[{"publication_status":"published","date_updated":"2026-02-02T21:38:34Z","article_type":"original","intvolume":"        13","year":"2026","title":"Approximating Incoherent Monochromatic Light Sources in FDTD Simulations","publication_identifier":{"issn":["2304-6732"]},"author":[{"full_name":"Metzner, Dominik","last_name":"Metzner","first_name":"Dominik"},{"first_name":"Jens","last_name":"Potthoff","full_name":"Potthoff, Jens"},{"id":"30525","full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas"},{"full_name":"Förstner, Jens","last_name":"Förstner","first_name":"Jens","orcid":"0000-0001-7059-9862","id":"158"}],"doi":"10.3390/photonics13020128","article_number":"128","main_file_link":[{"open_access":"1","url":"https://www.mdpi.com/2304-6732/13/2/128"}],"language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Light-emitting diodes (LEDs) are becoming increasingly important across various sectors of the lighting industry and are being used more frequently. In the field of symbolic projection, research is increasingly focusing on implementing light modulation using energy-efficient, incoherent LEDs rather than lasers. Since light modulation in micro- and nano-optics is typically achieved through phase modulation, Finite-Difference Time-Domain (FDTD) simulations are employed for analysis. The objective of this article is to investigate different approaches for approximating incoherent monochromatic light sources within FDTD simulations. To this end, two approaches based on dipole sources are considered, as well as a method involving plane waves with modulated wavefronts based on Cosine–Fourier functions and a method based on the superposition of Gaussian beams. These methods are evaluated in terms of their accuracy using a two-dimensional double-slit configuration and are compared against a fully incoherent analytical reference."}],"issue":"2","publication":"Photonics","keyword":["tet_topic_opticalantenna","tet_topic_numerics","tet_topic_meta"],"type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"61"}],"date_created":"2026-02-02T07:18:03Z","status":"public","user_id":"158","volume":13,"_id":"63827","publisher":"MDPI AG","quality_controlled":"1","citation":{"bibtex":"@article{Metzner_Potthoff_Zentgraf_Förstner_2026, title={Approximating Incoherent Monochromatic Light Sources in FDTD Simulations}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>}, number={2128}, journal={Photonics}, publisher={MDPI AG}, author={Metzner, Dominik and Potthoff, Jens and Zentgraf, Thomas and Förstner, Jens}, year={2026} }","ama":"Metzner D, Potthoff J, Zentgraf T, Förstner J. Approximating Incoherent Monochromatic Light Sources in FDTD Simulations. <i>Photonics</i>. 2026;13(2). doi:<a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>","mla":"Metzner, Dominik, et al. “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations.” <i>Photonics</i>, vol. 13, no. 2, 128, MDPI AG, 2026, doi:<a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>.","short":"D. Metzner, J. Potthoff, T. Zentgraf, J. Förstner, Photonics 13 (2026).","chicago":"Metzner, Dominik, Jens Potthoff, Thomas Zentgraf, and Jens Förstner. “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations.” <i>Photonics</i> 13, no. 2 (2026). <a href=\"https://doi.org/10.3390/photonics13020128\">https://doi.org/10.3390/photonics13020128</a>.","ieee":"D. Metzner, J. Potthoff, T. Zentgraf, and J. Förstner, “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations,” <i>Photonics</i>, vol. 13, no. 2, Art. no. 128, 2026, doi: <a href=\"https://doi.org/10.3390/photonics13020128\">10.3390/photonics13020128</a>.","apa":"Metzner, D., Potthoff, J., Zentgraf, T., &#38; Förstner, J. (2026). Approximating Incoherent Monochromatic Light Sources in FDTD Simulations. <i>Photonics</i>, <i>13</i>(2), Article 128. <a href=\"https://doi.org/10.3390/photonics13020128\">https://doi.org/10.3390/photonics13020128</a>"},"oa":"1"},{"publication":"Duke Math. Journal ","citation":{"apa":"Lutsko, C., Weich, T., &#38; Wolf, L. L. (2026). Polyhedral bounds on the joint spectrum and temperedness of locally  symmetric spaces. <i>Duke Math. Journal </i>, <i>(to appear)</i>.","ieee":"C. Lutsko, T. Weich, and L. L. Wolf, “Polyhedral bounds on the joint spectrum and temperedness of locally  symmetric spaces,” <i>Duke Math. Journal </i>, vol. (to appear), 2026.","short":"C. Lutsko, T. Weich, L.L. Wolf, Duke Math. Journal  (to appear) (2026).","chicago":"Lutsko, Christopher, Tobias Weich, and Lasse Lennart Wolf. “Polyhedral Bounds on the Joint Spectrum and Temperedness of Locally  Symmetric Spaces.” <i>Duke Math. Journal </i> (to appear) (2026).","mla":"Lutsko, Christopher, et al. “Polyhedral Bounds on the Joint Spectrum and Temperedness of Locally  Symmetric Spaces.” <i>Duke Math. Journal </i>, vol. (to appear), 2026.","ama":"Lutsko C, Weich T, Wolf LL. Polyhedral bounds on the joint spectrum and temperedness of locally  symmetric spaces. <i>Duke Math Journal </i>. 2026;(to appear).","bibtex":"@article{Lutsko_Weich_Wolf_2026, title={Polyhedral bounds on the joint spectrum and temperedness of locally  symmetric spaces}, volume={(to appear)}, journal={Duke Math. Journal }, author={Lutsko, Christopher and Weich, Tobias and Wolf, Lasse Lennart}, year={2026} }"},"abstract":[{"lang":"eng","text":"Given a real semisimple connected Lie group $G$ and a discrete torsion-free\r\nsubgroup $\\Gamma < G$ we prove a precise connection between growth rates of the\r\ngroup $\\Gamma$, polyhedral bounds on the joint spectrum of the ring of\r\ninvariant differential operators, and the decay of matrix coefficients. In\r\nparticular, this allows us to completely characterize temperedness of\r\n$L^2(\\Gamma\\backslash G)$ in this general setting."}],"external_id":{"arxiv":["2402.02530"]},"date_created":"2024-02-06T20:35:36Z","type":"journal_article","department":[{"_id":"10"},{"_id":"623"},{"_id":"548"}],"status":"public","year":"2026","title":"Polyhedral bounds on the joint spectrum and temperedness of locally  symmetric spaces","author":[{"full_name":"Lutsko, Christopher","first_name":"Christopher","last_name":"Lutsko"},{"orcid":"0000-0002-9648-6919","first_name":"Tobias","last_name":"Weich","full_name":"Weich, Tobias","id":"49178"},{"id":"45027","full_name":"Wolf, Lasse Lennart","first_name":"Lasse Lennart","orcid":"0000-0001-8893-2045","last_name":"Wolf"}],"date_updated":"2026-02-18T10:37:47Z","_id":"51204","language":[{"iso":"eng"}],"user_id":"49178","volume":"(to appear)"},{"abstract":[{"lang":"eng","text":"Probing novel properties, arising from twisted interfaces, has traditionally relied on the stacking of exfoliated two-dimensional materials and the spontaneous formation of van der Waals bonds. So far, investigations involving intimate covalent or ionic bonds have not been a focus. Yet, we show here that an established technique, involving thermocompressional wafer bonding, works well for creating twisted non-van der Waals interfaces. We have successfully bonded z-cut lithium niobate single crystals to create ferroelectric oxide interfaces with strong polar discontinuities and have mapped the associated emergent interfacial conductivity. In some instances, a dramatic change in microstructure occurs, involving local dipolar switching. A twist-induced collapse in the capability of the system to effec8tively screen interfacial bound charge is implied. Importantly, this only occurs around specific moiré twist angles with sparse coincident lattices and associated short-range aperiodicity. In quasicrystals, aperiodicity is known to induce pseudo-bandgaps and we suspect a similar phenomenon here."}],"publication":"Nature Communications","issue":"1","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2026-03-08T09:20:13Z","intvolume":"        17","article_type":"original","date_updated":"2026-03-08T09:22:25Z","publication_status":"published","author":[{"first_name":"Andrew","last_name":"Rogers","full_name":"Rogers, Andrew"},{"full_name":"Holsgrove, Kristina","last_name":"Holsgrove","first_name":"Kristina"},{"full_name":"Schäfer, Nils A.","first_name":"Nils A.","last_name":"Schäfer"},{"last_name":"Koppitz","first_name":"Boris","full_name":"Koppitz, Boris"},{"first_name":"Conor J.","last_name":"McCluskey","full_name":"McCluskey, Conor J."},{"last_name":"Yedama","first_name":"Shivani","full_name":"Yedama, Shivani"},{"full_name":"Lynch, Ronan","first_name":"Ronan","last_name":"Lynch"},{"full_name":"Sloan, Keelan","first_name":"Keelan","last_name":"Sloan"},{"last_name":"Porter","first_name":"Barry","full_name":"Porter, Barry"},{"first_name":"Adam","last_name":"Sykes","full_name":"Sykes, Adam"},{"full_name":"Catalan Daniels, Alex","first_name":"Alex","last_name":"Catalan Daniels"},{"full_name":"Silva, Romualdo S.","last_name":"Silva","first_name":"Romualdo S."},{"last_name":"Bruno","first_name":"Flavio Y.","full_name":"Bruno, Flavio Y."},{"full_name":"Seddon, Sam D.","first_name":"Sam D.","last_name":"Seddon"},{"first_name":"Haidong","last_name":"Lu","full_name":"Lu, Haidong"},{"orcid":"0000-0003-4682-4577","last_name":"Rüsing","first_name":"Michael","full_name":"Rüsing, Michael","id":"22501"},{"first_name":"Christa","last_name":"Fink","full_name":"Fink, Christa"},{"full_name":"Fahler-Muenzer, Philipp","last_name":"Fahler-Muenzer","first_name":"Philipp"},{"full_name":"Fearn, Sarah","last_name":"Fearn","first_name":"Sarah"},{"full_name":"Heutz, Sandrine E. M.","last_name":"Heutz","first_name":"Sandrine E. M."},{"last_name":"Hadjimichael","first_name":"Marios","full_name":"Hadjimichael, Marios"},{"first_name":"Quentin M.","last_name":"Ramasse","full_name":"Ramasse, Quentin M."},{"full_name":"Alexe, Marin","last_name":"Alexe","first_name":"Marin"},{"last_name":"Kumar","first_name":"Amit","full_name":"Kumar, Amit"},{"full_name":"McQuaid, Raymond G. P.","first_name":"Raymond G. P.","last_name":"McQuaid"},{"full_name":"Gruverman, Alexei","last_name":"Gruverman","first_name":"Alexei"},{"full_name":"Sanna, Simone","last_name":"Sanna","first_name":"Simone"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"full_name":"Gregg, J. Marty","last_name":"Gregg","first_name":"J. Marty"}],"publication_identifier":{"issn":["2041-1723"]},"year":"2026","title":"Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces","doi":"10.1038/s41467-026-68553-7","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://www.nature.com/articles/s41467-026-68553-7"}],"article_number":"1842","quality_controlled":"1","citation":{"ieee":"A. Rogers <i>et al.</i>, “Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces,” <i>Nature Communications</i>, vol. 17, no. 1, Art. no. 1842, 2026, doi: <a href=\"https://doi.org/10.1038/s41467-026-68553-7\">10.1038/s41467-026-68553-7</a>.","apa":"Rogers, A., Holsgrove, K., Schäfer, N. A., Koppitz, B., McCluskey, C. J., Yedama, S., Lynch, R., Sloan, K., Porter, B., Sykes, A., Catalan Daniels, A., Silva, R. S., Bruno, F. Y., Seddon, S. D., Lu, H., Rüsing, M., Fink, C., Fahler-Muenzer, P., Fearn, S., … Gregg, J. M. (2026). Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces. <i>Nature Communications</i>, <i>17</i>(1), Article 1842. <a href=\"https://doi.org/10.1038/s41467-026-68553-7\">https://doi.org/10.1038/s41467-026-68553-7</a>","chicago":"Rogers, Andrew, Kristina Holsgrove, Nils A. Schäfer, Boris Koppitz, Conor J. McCluskey, Shivani Yedama, Ronan Lynch, et al. “Polar Discontinuities, Emergent Conductivity, and Critical Twist-Angle-Dependent Behaviour at Wafer-Bonded Ferroelectric Interfaces.” <i>Nature Communications</i> 17, no. 1 (2026). <a href=\"https://doi.org/10.1038/s41467-026-68553-7\">https://doi.org/10.1038/s41467-026-68553-7</a>.","short":"A. Rogers, K. Holsgrove, N.A. Schäfer, B. Koppitz, C.J. McCluskey, S. Yedama, R. Lynch, K. Sloan, B. Porter, A. Sykes, A. Catalan Daniels, R.S. Silva, F.Y. Bruno, S.D. Seddon, H. Lu, M. Rüsing, C. Fink, P. Fahler-Muenzer, S. Fearn, S.E.M. Heutz, M. Hadjimichael, Q.M. Ramasse, M. Alexe, A. Kumar, R.G.P. McQuaid, A. Gruverman, S. Sanna, L.M. Eng, J.M. Gregg, Nature Communications 17 (2026).","mla":"Rogers, Andrew, et al. “Polar Discontinuities, Emergent Conductivity, and Critical Twist-Angle-Dependent Behaviour at Wafer-Bonded Ferroelectric Interfaces.” <i>Nature Communications</i>, vol. 17, no. 1, 1842, Springer Science and Business Media LLC, 2026, doi:<a href=\"https://doi.org/10.1038/s41467-026-68553-7\">10.1038/s41467-026-68553-7</a>.","bibtex":"@article{Rogers_Holsgrove_Schäfer_Koppitz_McCluskey_Yedama_Lynch_Sloan_Porter_Sykes_et al._2026, title={Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces}, volume={17}, DOI={<a href=\"https://doi.org/10.1038/s41467-026-68553-7\">10.1038/s41467-026-68553-7</a>}, number={11842}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Rogers, Andrew and Holsgrove, Kristina and Schäfer, Nils A. and Koppitz, Boris and McCluskey, Conor J. and Yedama, Shivani and Lynch, Ronan and Sloan, Keelan and Porter, Barry and Sykes, Adam and et al.}, year={2026} }","ama":"Rogers A, Holsgrove K, Schäfer NA, et al. Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces. <i>Nature Communications</i>. 2026;17(1). doi:<a href=\"https://doi.org/10.1038/s41467-026-68553-7\">10.1038/s41467-026-68553-7</a>"},"oa":"1","status":"public","volume":17,"user_id":"22501","_id":"64864","publisher":"Springer Science and Business Media LLC"},{"status":"public","_id":"64873","publisher":"American Chemical Society (ACS)","volume":11,"user_id":"30525","citation":{"bibtex":"@article{Killi_Kumar_Nebhani_Obst_Richter_Reineke Matsudo_Zentgraf_Kuckling_2026, title={Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction}, volume={11}, DOI={<a href=\"https://doi.org/10.1021/acsomega.5c09476\">10.1021/acsomega.5c09476</a>}, number={914448}, journal={ACS Omega}, publisher={American Chemical Society (ACS)}, author={Killi, Naresh and Kumar, Amit and Nebhani, Leena and Obst, Franziska and Richter, Andreas and Reineke Matsudo, Bernhard and Zentgraf, Thomas and Kuckling, Dirk}, year={2026} }","ama":"Killi N, Kumar A, Nebhani L, et al. Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction. <i>ACS Omega</i>. 2026;11(9). doi:<a href=\"https://doi.org/10.1021/acsomega.5c09476\">10.1021/acsomega.5c09476</a>","mla":"Killi, Naresh, et al. “Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction.” <i>ACS Omega</i>, vol. 11, no. 9, 14448, American Chemical Society (ACS), 2026, doi:<a href=\"https://doi.org/10.1021/acsomega.5c09476\">10.1021/acsomega.5c09476</a>.","chicago":"Killi, Naresh, Amit Kumar, Leena Nebhani, Franziska Obst, Andreas Richter, Bernhard Reineke Matsudo, Thomas Zentgraf, and Dirk Kuckling. “Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction.” <i>ACS Omega</i> 11, no. 9 (2026). <a href=\"https://doi.org/10.1021/acsomega.5c09476\">https://doi.org/10.1021/acsomega.5c09476</a>.","short":"N. Killi, A. Kumar, L. Nebhani, F. Obst, A. Richter, B. Reineke Matsudo, T. Zentgraf, D. Kuckling, ACS Omega 11 (2026).","ieee":"N. Killi <i>et al.</i>, “Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction,” <i>ACS Omega</i>, vol. 11, no. 9, Art. no. 14448, 2026, doi: <a href=\"https://doi.org/10.1021/acsomega.5c09476\">10.1021/acsomega.5c09476</a>.","apa":"Killi, N., Kumar, A., Nebhani, L., Obst, F., Richter, A., Reineke Matsudo, B., Zentgraf, T., &#38; Kuckling, D. (2026). Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction. <i>ACS Omega</i>, <i>11</i>(9), Article 14448. <a href=\"https://doi.org/10.1021/acsomega.5c09476\">https://doi.org/10.1021/acsomega.5c09476</a>"},"quality_controlled":"1","oa":"1","publication_identifier":{"issn":["2470-1343","2470-1343"]},"author":[{"full_name":"Killi, Naresh","first_name":"Naresh","last_name":"Killi"},{"last_name":"Kumar","first_name":"Amit","full_name":"Kumar, Amit"},{"full_name":"Nebhani, Leena","first_name":"Leena","last_name":"Nebhani"},{"first_name":"Franziska","last_name":"Obst","full_name":"Obst, Franziska"},{"first_name":"Andreas","last_name":"Richter","full_name":"Richter, Andreas"},{"first_name":"Bernhard","last_name":"Reineke Matsudo","full_name":"Reineke Matsudo, Bernhard"},{"id":"30525","full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","first_name":"Thomas","last_name":"Zentgraf"},{"id":"287","full_name":"Kuckling, Dirk","last_name":"Kuckling","first_name":"Dirk"}],"year":"2026","title":"Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction","intvolume":"        11","article_type":"original","date_updated":"2026-03-10T08:27:15Z","publication_status":"published","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://pubs.acs.org/doi/abs/10.1021/acsomega.5c09476","open_access":"1"}],"article_number":"14448","doi":"10.1021/acsomega.5c09476","publication":"ACS Omega","issue":"9","abstract":[{"lang":"eng","text":"Continuous flow catalysis utilizing gel-bound organocatalysts within a microfluidic reactor represents a compelling strategy in the realm of organic synthesis. In this study, a quinuclidine-based catalytic monomer (QMA) was synthesized to create polymer gel dots through the process of photopolymerization that serve as a support for the catalyst. The resulting gel-bound organocatalysts were assembled within a continuous microfluidic reactor to facilitate the Baylis–Hillman reaction between various aldehydes and acrylonitrile at a temperature of 50 °C. The conversion of the product was assessed using 1H NMR spectroscopy as an offline analytical method over a duration of 8 h. The findings indicated that highly reactive aldehydes achieved conversion rates exceeding 90%, in contrast to their less reactive counterparts. Furthermore, these results were juxtaposed with previously published data derived from alternative synthetic methodologies, revealing that the continuous microfluidic reactions employing integrated organocatalysts within polymer networks exhibited significantly higher conversions with reduced reaction times (8 h) at the same temperature (50 °C). Additionally, the influence of different geometries (round, triangular, and square) of the gel dots on catalytic activity was investigated, with round and square gel dots demonstrating slightly superior performance compared with triangular gel dots, attributed to their increased surface area. Moreover, an extended reaction period of 6 days was conducted using 4-bromobenzaldehyde and acrylonitrile, resulting in a conversion rate exceeding 70%, which remained stable for 5 days before experiencing a slight decline due to product accumulation on the gel dots."}],"date_created":"2026-03-10T08:23:43Z","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"2"},{"_id":"311"}],"type":"journal_article"},{"doi":"10.1002/adma.202511823","main_file_link":[{"url":"https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202511823","open_access":"1"}],"article_number":"e11823","language":[{"iso":"eng"}],"date_updated":"2026-03-10T08:32:37Z","publication_status":"published","intvolume":"        38","article_type":"original","year":"2026","title":"Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation","publication_identifier":{"issn":["0935-9648","1521-4095"]},"author":[{"first_name":"Xiao","last_name":"Jin","full_name":"Jin, Xiao"},{"full_name":"Zentgraf, Thomas","first_name":"Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","id":"30525"}],"type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"date_created":"2025-10-06T05:42:21Z","abstract":[{"text":"Abstract</jats:title><jats:p>Metasurface holography offers a powerful approach for manipulating wavefronts at the nano and micro scale. Extensive research has been conducted to enhance the multiplexing capacity for diverse wavefronts. However, the independence of multiplexed channels is fundamentally restricted in techniques using single‐layer metasurfaces, resulting in unavoidable crosstalk and the need for post‐filtering of the output wavefronts. Here, a universal wavefront multiplexing concept is presented based on non‐injective transformation. By employing joint optimization on two metasurfaces, different channels can be independently designed without any constraints on the output wavefronts. To validate this approach, ultra‐compact orbital angular momentum (OAM) sorters are designed. In these experiments, the output beams from different channels can be independently mapped to 2D positions with high fineness. In another application of wavefront‐multiplexed holography, 10‐channel multiplexing is experimentally achieved with minimal crosstalk and without the need for post‐processing. These results demonstrate the independence between channels enabled by the non‐injective transformation in the method. The precise wavefront control and high multiplexing capacity underscore its potential for scalable wavefront manipulation devices.","lang":"eng"}],"publication":"Advanced Materials","user_id":"30525","volume":38,"publisher":"Wiley","_id":"61523","status":"public","oa":"1","quality_controlled":"1","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"54","name":"TRR 142 - Project Area A"},{"_id":"55","name":"TRR 142 - Project Area B"},{"_id":"65","name":"TRR 142; TP A08: Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten"},{"name":"TRR 142; TP B09: Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen","_id":"170"}],"citation":{"apa":"Jin, X., &#38; Zentgraf, T. (2026). Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation. <i>Advanced Materials</i>, <i>38</i>, Article e11823. <a href=\"https://doi.org/10.1002/adma.202511823\">https://doi.org/10.1002/adma.202511823</a>","ieee":"X. Jin and T. Zentgraf, “Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation,” <i>Advanced Materials</i>, vol. 38, Art. no. e11823, 2026, doi: <a href=\"https://doi.org/10.1002/adma.202511823\">10.1002/adma.202511823</a>.","short":"X. Jin, T. Zentgraf, Advanced Materials 38 (2026).","chicago":"Jin, Xiao, and Thomas Zentgraf. “Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation.” <i>Advanced Materials</i> 38 (2026). <a href=\"https://doi.org/10.1002/adma.202511823\">https://doi.org/10.1002/adma.202511823</a>.","mla":"Jin, Xiao, and Thomas Zentgraf. “Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation.” <i>Advanced Materials</i>, vol. 38, e11823, Wiley, 2026, doi:<a href=\"https://doi.org/10.1002/adma.202511823\">10.1002/adma.202511823</a>.","ama":"Jin X, Zentgraf T. Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation. <i>Advanced Materials</i>. 2026;38. doi:<a href=\"https://doi.org/10.1002/adma.202511823\">10.1002/adma.202511823</a>","bibtex":"@article{Jin_Zentgraf_2026, title={Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation}, volume={38}, DOI={<a href=\"https://doi.org/10.1002/adma.202511823\">10.1002/adma.202511823</a>}, number={e11823}, journal={Advanced Materials}, publisher={Wiley}, author={Jin, Xiao and Zentgraf, Thomas}, year={2026} }"}},{"citation":{"mla":"Doshi, Siddharth, et al. “Soft Photonic Skins with Dynamic Texture and Colour Control.” <i>Nature</i>, vol. 649, no. 8096, Springer Science and Business Media LLC, 2026, pp. 345–52, doi:<a href=\"https://doi.org/10.1038/s41586-025-09948-2\">10.1038/s41586-025-09948-2</a>.","ama":"Doshi S, Güsken NA, Dijk G, et al. Soft photonic skins with dynamic texture and colour control. <i>Nature</i>. 2026;649(8096):345-352. doi:<a href=\"https://doi.org/10.1038/s41586-025-09948-2\">10.1038/s41586-025-09948-2</a>","bibtex":"@article{Doshi_Güsken_Dijk_Carlström_Ortiz-Cárdenas_Suzuki_Li_Fordyce_Salleo_Melosh_et al._2026, title={Soft photonic skins with dynamic texture and colour control}, volume={649}, DOI={<a href=\"https://doi.org/10.1038/s41586-025-09948-2\">10.1038/s41586-025-09948-2</a>}, number={8096}, journal={Nature}, publisher={Springer Science and Business Media LLC}, author={Doshi, Siddharth and Güsken, Nicholas Alexander and Dijk, Gerwin and Carlström, Johan and Ortiz-Cárdenas, Jennifer E. and Suzuki, Peter and Li, Bohan and Fordyce, Polly M. and Salleo, Alberto and Melosh, Nicholas A. and et al.}, year={2026}, pages={345–352} }","apa":"Doshi, S., Güsken, N. A., Dijk, G., Carlström, J., Ortiz-Cárdenas, J. E., Suzuki, P., Li, B., Fordyce, P. M., Salleo, A., Melosh, N. A., &#38; Brongersma, M. L. (2026). Soft photonic skins with dynamic texture and colour control. <i>Nature</i>, <i>649</i>(8096), 345–352. <a href=\"https://doi.org/10.1038/s41586-025-09948-2\">https://doi.org/10.1038/s41586-025-09948-2</a>","ieee":"S. Doshi <i>et al.</i>, “Soft photonic skins with dynamic texture and colour control,” <i>Nature</i>, vol. 649, no. 8096, pp. 345–352, 2026, doi: <a href=\"https://doi.org/10.1038/s41586-025-09948-2\">10.1038/s41586-025-09948-2</a>.","short":"S. Doshi, N.A. Güsken, G. Dijk, J. Carlström, J.E. Ortiz-Cárdenas, P. Suzuki, B. Li, P.M. Fordyce, A. Salleo, N.A. Melosh, M.L. Brongersma, Nature 649 (2026) 345–352.","chicago":"Doshi, Siddharth, Nicholas Alexander Güsken, Gerwin Dijk, Johan Carlström, Jennifer E. Ortiz-Cárdenas, Peter Suzuki, Bohan Li, et al. “Soft Photonic Skins with Dynamic Texture and Colour Control.” <i>Nature</i> 649, no. 8096 (2026): 345–52. <a href=\"https://doi.org/10.1038/s41586-025-09948-2\">https://doi.org/10.1038/s41586-025-09948-2</a>."},"volume":649,"user_id":"112030","publisher":"Springer Science and Business Media LLC","_id":"63531","page":"345-352","status":"public","department":[{"_id":"623"},{"_id":"15"},{"_id":"230"}],"type":"journal_article","date_created":"2026-01-08T12:55:30Z","publication":"Nature","issue":"8096","doi":"10.1038/s41586-025-09948-2","language":[{"iso":"eng"}],"intvolume":"       649","date_updated":"2026-01-08T13:22:16Z","publication_status":"published","publication_identifier":{"issn":["0028-0836","1476-4687"]},"author":[{"full_name":"Doshi, Siddharth","first_name":"Siddharth","last_name":"Doshi"},{"first_name":"Nicholas Alexander","orcid":"0000-0002-4816-0666","last_name":"Güsken","full_name":"Güsken, Nicholas Alexander","id":"112030"},{"full_name":"Dijk, Gerwin","last_name":"Dijk","first_name":"Gerwin"},{"first_name":"Johan","last_name":"Carlström","full_name":"Carlström, Johan"},{"full_name":"Ortiz-Cárdenas, Jennifer E.","last_name":"Ortiz-Cárdenas","first_name":"Jennifer E."},{"full_name":"Suzuki, Peter","first_name":"Peter","last_name":"Suzuki"},{"first_name":"Bohan","last_name":"Li","full_name":"Li, Bohan"},{"full_name":"Fordyce, Polly M.","last_name":"Fordyce","first_name":"Polly M."},{"last_name":"Salleo","first_name":"Alberto","full_name":"Salleo, Alberto"},{"full_name":"Melosh, Nicholas A.","last_name":"Melosh","first_name":"Nicholas A."},{"last_name":"Brongersma","first_name":"Mark L.","full_name":"Brongersma, Mark L."}],"title":"Soft photonic skins with dynamic texture and colour control","year":"2026"},{"department":[{"_id":"61"},{"_id":"623"}],"type":"journal_article","keyword":["tet_topic_opticalantenna"],"date_created":"2026-01-08T20:48:26Z","file":[{"creator":"fossie","date_created":"2026-01-08T20:51:12Z","relation":"main_file","date_updated":"2026-01-08T20:51:12Z","file_name":"2026-01 Jeong-Hui-Kim - JACS - Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing (with Purdue).pdf","access_level":"closed","file_size":5453427,"file_id":"63533","success":1,"content_type":"application/pdf"}],"abstract":[{"text":"Room-temperature lasing is a key milestone in the development of miniaturized optoelectronic and photonic devices. We present a simple approach to synthesize phase-pure quasi-2D layered tin perovskite nanowires with varying quantum well thicknesses (n = 1 to 4). By incorporating a new organic spacer capable of forming a hydrogen-bonded organic framework, this method promoted anisotropic crystal growth and enhanced lattice rigidity. Furthermore, introducing molecular intercalants enabled controlled crystallization into well-defined nanowires that function as Fabry–Pérot cavities. Cavities made from n = 2 to 4 perovskites support efficient and robust near-infrared, room-temperature optically pumped lasing with the threshold as low as 75.8 μJ/cm2, cavity quality factor over 3000, and negligible degradation over 106 pulses. A cleaved coupled nanolaser was fabricated as a proof-of-concept device for photonic applications.","lang":"eng"}],"publication":"Journal of the American Chemical Society","doi":"10.1021/jacs.5c14431","language":[{"iso":"eng"}],"article_type":"original","date_updated":"2026-01-08T20:54:59Z","publication_status":"published","publication_identifier":{"issn":["0002-7863","1520-5126"]},"author":[{"full_name":"Kim, Jeong Hui","last_name":"Kim","first_name":"Jeong Hui"},{"full_name":"Simon, Jeffrey","last_name":"Simon","first_name":"Jeffrey"},{"first_name":"Wenhao","last_name":"Shao","full_name":"Shao, Wenhao"},{"last_name":"Nian","first_name":"Zhichen","full_name":"Nian, Zhichen"},{"first_name":"Hanjun","last_name":"Yang","full_name":"Yang, Hanjun"},{"full_name":"Chen, Peigang","last_name":"Chen","first_name":"Peigang"},{"full_name":"Triplett, Brandon","first_name":"Brandon","last_name":"Triplett"},{"full_name":"Li, Zhixu","first_name":"Zhixu","last_name":"Li"},{"first_name":"Pengfei","last_name":"Wu","full_name":"Wu, Pengfei"},{"full_name":"Chen, Yuheng","first_name":"Yuheng","last_name":"Chen"},{"id":"53444","full_name":"Farheen, Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489","first_name":"Henna"},{"full_name":"Pagadala, Karthik","last_name":"Pagadala","first_name":"Karthik"},{"full_name":"Choi, Kyu Ri","first_name":"Kyu Ri","last_name":"Choi"},{"first_name":"Colton B.","last_name":"Fruhling","full_name":"Fruhling, Colton B."},{"id":"158","last_name":"Förstner","first_name":"Jens","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens"},{"full_name":"Boltasseva, Alexandra","last_name":"Boltasseva","first_name":"Alexandra"},{"last_name":"Savoie","first_name":"Brett M.","full_name":"Savoie, Brett M."},{"first_name":"Vladimir M.","last_name":"Shalaev","full_name":"Shalaev, Vladimir M."},{"full_name":"Dou, Letian","last_name":"Dou","first_name":"Letian"}],"title":"Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing","year":"2026","citation":{"bibtex":"@article{Kim_Simon_Shao_Nian_Yang_Chen_Triplett_Li_Wu_Chen_et al._2026, title={Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing}, DOI={<a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>}, journal={Journal of the American Chemical Society}, publisher={American Chemical Society (ACS)}, author={Kim, Jeong Hui and Simon, Jeffrey and Shao, Wenhao and Nian, Zhichen and Yang, Hanjun and Chen, Peigang and Triplett, Brandon and Li, Zhixu and Wu, Pengfei and Chen, Yuheng and et al.}, year={2026}, pages={jacs.5c14431} }","ama":"Kim JH, Simon J, Shao W, et al. Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing. <i>Journal of the American Chemical Society</i>. Published online 2026:jacs.5c14431. doi:<a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>","mla":"Kim, Jeong Hui, et al. “Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing.” <i>Journal of the American Chemical Society</i>, American Chemical Society (ACS), 2026, p. jacs.5c14431, doi:<a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>.","short":"J.H. Kim, J. Simon, W. Shao, Z. Nian, H. Yang, P. Chen, B. Triplett, Z. Li, P. Wu, Y. Chen, H. Farheen, K. Pagadala, K.R. Choi, C.B. Fruhling, J. Förstner, A. Boltasseva, B.M. Savoie, V.M. Shalaev, L. Dou, Journal of the American Chemical Society (2026) jacs.5c14431.","chicago":"Kim, Jeong Hui, Jeffrey Simon, Wenhao Shao, Zhichen Nian, Hanjun Yang, Peigang Chen, Brandon Triplett, et al. “Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing.” <i>Journal of the American Chemical Society</i>, 2026, jacs.5c14431. <a href=\"https://doi.org/10.1021/jacs.5c14431\">https://doi.org/10.1021/jacs.5c14431</a>.","ieee":"J. H. Kim <i>et al.</i>, “Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing,” <i>Journal of the American Chemical Society</i>, p. jacs.5c14431, 2026, doi: <a href=\"https://doi.org/10.1021/jacs.5c14431\">10.1021/jacs.5c14431</a>.","apa":"Kim, J. H., Simon, J., Shao, W., Nian, Z., Yang, H., Chen, P., Triplett, B., Li, Z., Wu, P., Chen, Y., Farheen, H., Pagadala, K., Choi, K. R., Fruhling, C. B., Förstner, J., Boltasseva, A., Savoie, B. M., Shalaev, V. M., &#38; Dou, L. (2026). Hydrogen-Bonded Organic Framework Enables Phase-Pure Layered Tin Perovskite Nanowires for Room-Temperature Lasing. <i>Journal of the American Chemical Society</i>, jacs.5c14431. <a href=\"https://doi.org/10.1021/jacs.5c14431\">https://doi.org/10.1021/jacs.5c14431</a>"},"file_date_updated":"2026-01-08T20:51:12Z","ddc":["530"],"user_id":"158","_id":"63532","publisher":"American Chemical Society (ACS)","page":"jacs.5c14431","has_accepted_license":"1","status":"public"},{"language":[{"iso":"eng"}],"_id":"64877","doi":"10.48550/ARXIV.2603.01656","user_id":"16199","author":[{"full_name":"Taheri, Behnood","first_name":"Behnood","last_name":"Taheri"},{"full_name":"Kopylov, Denis","last_name":"Kopylov","first_name":"Denis","id":"98502"},{"last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred","full_name":"Hammer, Manfred","id":"48077"},{"full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten","id":"344"},{"id":"158","orcid":"0000-0001-7059-9862","first_name":"Jens","last_name":"Förstner","full_name":"Förstner, Jens"},{"id":"60286","first_name":"Polina R.","last_name":"Sharapova","full_name":"Sharapova, Polina R."}],"title":"Gain-induced spectral non-degeneracy in type-II parametric down-conversion","status":"public","year":"2026","date_updated":"2026-03-10T15:41:18Z","date_created":"2026-03-10T15:37:22Z","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"34"},{"_id":"61"},{"_id":"230"},{"_id":"623"},{"_id":"429"}],"type":"journal_article","citation":{"ieee":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, and P. R. Sharapova, “Gain-induced spectral non-degeneracy in type-II parametric down-conversion,” <i>arXiv</i>, 2026, doi: <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>.","apa":"Taheri, B., Kopylov, D., Hammer, M., Meier, T., Förstner, J., &#38; Sharapova, P. R. (2026). Gain-induced spectral non-degeneracy in type-II parametric down-conversion. <i>ArXiv</i>. <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">https://doi.org/10.48550/ARXIV.2603.01656</a>","short":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, P.R. Sharapova, ArXiv (2026).","chicago":"Taheri, Behnood, Denis Kopylov, Manfred Hammer, Torsten Meier, Jens Förstner, and Polina R. Sharapova. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” <i>ArXiv</i>, 2026. <a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">https://doi.org/10.48550/ARXIV.2603.01656</a>.","mla":"Taheri, Behnood, et al. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” <i>ArXiv</i>, 2026, doi:<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>.","bibtex":"@article{Taheri_Kopylov_Hammer_Meier_Förstner_Sharapova_2026, title={Gain-induced spectral non-degeneracy in type-II parametric down-conversion}, DOI={<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>}, journal={arXiv}, author={Taheri, Behnood and Kopylov, Denis and Hammer, Manfred and Meier, Torsten and Förstner, Jens and Sharapova, Polina R.}, year={2026} }","ama":"Taheri B, Kopylov D, Hammer M, Meier T, Förstner J, Sharapova PR. Gain-induced spectral non-degeneracy in type-II parametric down-conversion. <i>arXiv</i>. Published online 2026. doi:<a href=\"https://doi.org/10.48550/ARXIV.2603.01656\">10.48550/ARXIV.2603.01656</a>"},"publication":"arXiv","project":[{"name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"}]},{"main_file_link":[{"open_access":"1","url":"https://www.researching.cn/Articles/OJafd1e3b9e643c6be"}],"article_number":"26010","language":[{"iso":"eng"}],"doi":"10.1117/1.ap.8.2.026010","year":"2026","title":"Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection","publication_identifier":{"issn":["2577-5421"]},"author":[{"full_name":"Jin, Xiao","first_name":"Xiao","last_name":"Jin"},{"orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas","full_name":"Zentgraf, Thomas","id":"30525"}],"date_updated":"2026-03-16T07:20:07Z","publication_status":"published","intvolume":"         8","article_type":"original","date_created":"2026-03-16T07:17:52Z","type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"publication":"Advanced Photonics","issue":"02","abstract":[{"lang":"eng","text":"The degrees of freedom (DoFs) of light determine the maximum number of independent signal\r\nchannels an optical system can support. However, the polarization DoF is intrinsically limited to two by\r\northogonality, which causes unavoidable crosstalk and often forces position multiplexing, where different\r\nchannels are assigned to distinct spatial locations to suppress crosstalk. This research introduces a multilayer\r\nsynchronous polarization projection method that fundamentally increases the DoF for polarization\r\nmultiplexing. The DoF equals twice the number of projection layers. We experimentally demonstrate six-\r\nchannel polarization multiplexing holography without position multiplexing. The six-channel multiplexing\r\nresults indicate that our approach exceeds the conventional polarization multiplexing method, yielding an\r\naverage 3.79 dB improvement in extinction ratio across the six channels. Compared with the theoretical\r\nlimit of traditional polarization multiplexing, our method reduces crosstalk by an average of 6.52 dB across\r\nall channels in a seven-channel design. The polarization projection method breaks the DoF limitation\r\nof polarization multiplexing, opening a path toward high-dimensional photonic information encoding for\r\ncommunication, encryption, and imaging."}],"_id":"64978","publisher":"SPIE-Intl Soc Optical Eng","user_id":"30525","volume":8,"status":"public","oa":"1","citation":{"chicago":"Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom for Polarization through Multilayer Synchronous Polarization Projection.” <i>Advanced Photonics</i> 8, no. 02 (2026). <a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">https://doi.org/10.1117/1.ap.8.2.026010</a>.","short":"X. Jin, T. Zentgraf, Advanced Photonics 8 (2026).","ieee":"X. Jin and T. Zentgraf, “Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection,” <i>Advanced Photonics</i>, vol. 8, no. 02, Art. no. 26010, 2026, doi: <a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>.","apa":"Jin, X., &#38; Zentgraf, T. (2026). Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection. <i>Advanced Photonics</i>, <i>8</i>(02), Article 26010. <a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">https://doi.org/10.1117/1.ap.8.2.026010</a>","bibtex":"@article{Jin_Zentgraf_2026, title={Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection}, volume={8}, DOI={<a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>}, number={0226010}, journal={Advanced Photonics}, publisher={SPIE-Intl Soc Optical Eng}, author={Jin, Xiao and Zentgraf, Thomas}, year={2026} }","ama":"Jin X, Zentgraf T. Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection. <i>Advanced Photonics</i>. 2026;8(02). doi:<a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>","mla":"Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom for Polarization through Multilayer Synchronous Polarization Projection.” <i>Advanced Photonics</i>, vol. 8, no. 02, 26010, SPIE-Intl Soc Optical Eng, 2026, doi:<a href=\"https://doi.org/10.1117/1.ap.8.2.026010\">10.1117/1.ap.8.2.026010</a>."},"quality_controlled":"1"},{"doi":"10.1103/cwsx-42c4","article_number":"034031","language":[{"iso":"eng"}],"date_updated":"2026-03-25T07:59:04Z","publication_status":"published","intvolume":"        25","title":"Toward integrated sensors for optimized optical coherence tomography with undetected photons","year":"2026","publication_identifier":{"issn":["2331-7019"]},"author":[{"first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz","id":"88149"},{"full_name":"Pollmann, René","first_name":"René","last_name":"Pollmann","id":"78890"},{"full_name":"Quiring, Viktor","first_name":"Viktor","last_name":"Quiring"},{"full_name":"Eigner, Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof","id":"13244"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 "},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"}],"type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"date_created":"2026-03-23T12:28:33Z","abstract":[{"text":"<jats:p>\r\n                    The development of practical sensors for optical coherence tomography (OCT) with undetected photons requires miniaturization via integration. To be practical, these sensors must exhibit a large spectral bandwidth and a high brightness, which are linked to a high axial resolution and a sufficient signal-to-noise ratio, respectively. Here, we combine these requirements in a scheme for OCT measurements with undetected photons based on nonlinear\r\n                    <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\">\r\n                      <a:mi>Ti</a:mi>\r\n                      <a:mo>:</a:mo>\r\n                      <a:msub>\r\n                        <a:mrow>\r\n                          <a:mi>Li</a:mi>\r\n                          <a:mi>Nb</a:mi>\r\n                          <a:mi mathvariant=\"normal\">O</a:mi>\r\n                        </a:mrow>\r\n                        <a:mn>3</a:mn>\r\n                      </a:msub>\r\n                    </a:math>\r\n                    waveguides. We investigate the performance benchmarks of the commonly used SU(1,1) scheme in comparison to an induced-coherence scheme and find that the latter is actually better suited when implementing measurements with undetected photons in integrated systems. In both schemes, we perform pump-gain optimization and OCT measurements with undetected photons with an axial resolution as low as\r\n                    <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\">\r\n                      <d:mn>28</d:mn>\r\n                      <d:mspace width=\"0.2em\"/>\r\n                      <d:mtext fontfamily=\"times\">μ</d:mtext>\r\n                      <d:mrow>\r\n                        <d:mi mathvariant=\"normal\">m</d:mi>\r\n                      </d:mrow>\r\n                    </d:math>\r\n                    .\r\n                  </jats:p>","lang":"eng"}],"publication":"Physical Review Applied","issue":"3","user_id":"27150","volume":25,"publisher":"American Physical Society (APS)","_id":"65094","status":"public","citation":{"ama":"Roeder F, Pollmann R, Quiring V, Eigner C, Brecht B, Silberhorn C. Toward integrated sensors for optimized optical coherence tomography with undetected photons. <i>Physical Review Applied</i>. 2026;25(3). doi:<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>","bibtex":"@article{Roeder_Pollmann_Quiring_Eigner_Brecht_Silberhorn_2026, title={Toward integrated sensors for optimized optical coherence tomography with undetected photons}, volume={25}, DOI={<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>}, number={3034031}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Roeder, Franz and Pollmann, René and Quiring, Viktor and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2026} }","mla":"Roeder, Franz, et al. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” <i>Physical Review Applied</i>, vol. 25, no. 3, 034031, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>.","short":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, C. Silberhorn, Physical Review Applied 25 (2026).","chicago":"Roeder, Franz, René Pollmann, Viktor Quiring, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” <i>Physical Review Applied</i> 25, no. 3 (2026). <a href=\"https://doi.org/10.1103/cwsx-42c4\">https://doi.org/10.1103/cwsx-42c4</a>.","apa":"Roeder, F., Pollmann, R., Quiring, V., Eigner, C., Brecht, B., &#38; Silberhorn, C. (2026). Toward integrated sensors for optimized optical coherence tomography with undetected photons. <i>Physical Review Applied</i>, <i>25</i>(3), Article 034031. <a href=\"https://doi.org/10.1103/cwsx-42c4\">https://doi.org/10.1103/cwsx-42c4</a>","ieee":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, and C. Silberhorn, “Toward integrated sensors for optimized optical coherence tomography with undetected photons,” <i>Physical Review Applied</i>, vol. 25, no. 3, Art. no. 034031, 2026, doi: <a href=\"https://doi.org/10.1103/cwsx-42c4\">10.1103/cwsx-42c4</a>."}},{"status":"public","publisher":"Optica Publishing Group","_id":"65096","user_id":"27150","volume":13,"citation":{"bibtex":"@article{Folge_Serino_Mišta_Brecht_Silberhorn_Řeháček_Hradil_2026, title={Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals}, volume={13}, DOI={<a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>}, number={3548}, journal={Optica}, publisher={Optica Publishing Group}, author={Folge, Patrick Fabian and Serino, Laura Maria and Mišta, Ladislav and Brecht, Benjamin and Silberhorn, Christine and Řeháček, Jaroslav and Hradil, Zdeněk}, year={2026} }","ama":"Folge PF, Serino LM, Mišta L, et al. Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals. <i>Optica</i>. 2026;13(3). doi:<a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>","mla":"Folge, Patrick Fabian, et al. “Quantum-Limited Detection of the Arrival Time and the Carrier Frequency of Time-Dependent Signals.” <i>Optica</i>, vol. 13, no. 3, 548, Optica Publishing Group, 2026, doi:<a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>.","chicago":"Folge, Patrick Fabian, Laura Maria Serino, Ladislav Mišta, Benjamin Brecht, Christine Silberhorn, Jaroslav Řeháček, and Zdeněk Hradil. “Quantum-Limited Detection of the Arrival Time and the Carrier Frequency of Time-Dependent Signals.” <i>Optica</i> 13, no. 3 (2026). <a href=\"https://doi.org/10.1364/optica.579459\">https://doi.org/10.1364/optica.579459</a>.","short":"P.F. Folge, L.M. Serino, L. Mišta, B. Brecht, C. Silberhorn, J. Řeháček, Z. Hradil, Optica 13 (2026).","ieee":"P. F. Folge <i>et al.</i>, “Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals,” <i>Optica</i>, vol. 13, no. 3, Art. no. 548, 2026, doi: <a href=\"https://doi.org/10.1364/optica.579459\">10.1364/optica.579459</a>.","apa":"Folge, P. F., Serino, L. M., Mišta, L., Brecht, B., Silberhorn, C., Řeháček, J., &#38; Hradil, Z. (2026). Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals. <i>Optica</i>, <i>13</i>(3), Article 548. <a href=\"https://doi.org/10.1364/optica.579459\">https://doi.org/10.1364/optica.579459</a>"},"year":"2026","title":"Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals","publication_identifier":{"issn":["2334-2536"]},"author":[{"id":"88605","full_name":"Folge, Patrick Fabian","last_name":"Folge","first_name":"Patrick Fabian"},{"full_name":"Serino, Laura Maria","last_name":"Serino","first_name":"Laura Maria","id":"88242"},{"first_name":"Ladislav","last_name":"Mišta","full_name":"Mišta, Ladislav"},{"full_name":"Brecht, Benjamin","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","id":"27150"},{"last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine","id":"26263"},{"last_name":"Řeháček","first_name":"Jaroslav","full_name":"Řeháček, Jaroslav"},{"first_name":"Zdeněk","last_name":"Hradil","full_name":"Hradil, Zdeněk"}],"date_updated":"2026-03-25T07:59:23Z","publication_status":"published","intvolume":"        13","article_number":"548","language":[{"iso":"eng"}],"doi":"10.1364/optica.579459","issue":"3","publication":"Optica","abstract":[{"lang":"eng","text":"<jats:p>\r\n                    Precise measurements of both the arrival time and carrier frequency of light pulses are essential for time–frequency-encoded quantum technologies. Quantum mechanics, however, imposes fundamental limits on the simultaneous determination of these quantities. In this work, we derive and experimentally verify the quantum uncertainty bounds governing joint time–frequency measurements. We show that when detection is restricted to finite time windows, the problem is naturally described by a quantum rotor, rendering the commonly used Heisenberg uncertainty relation inapplicable. We further propose an optimal detection scheme that saturates these fundamental limits. By sampling the\r\n                    <jats:italic toggle=\"yes\">Q</jats:italic>\r\n                    -function, we demonstrate the reconstruction of the Wigner function beyond the harmonic oscillator. Using an experimental implementation based on a quantum pulse gate, we confirm that the proposed scheme approaches the ultimate quantum limit for simultaneous time–frequency measurements. These results provide a framework for joint time–frequency detection with direct implications for precision measurements and quantum information processing.\r\n                  </jats:p>"}],"date_created":"2026-03-23T12:30:02Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}]},{"author":[{"full_name":"Schapeler, Timon","last_name":"Schapeler","first_name":"Timon","orcid":"0000-0001-7652-1716","id":"55629"},{"last_name":"Mischke","first_name":"Isabell","full_name":"Mischke, Isabell"},{"id":"63579","last_name":"Schlue","first_name":"Fabian","full_name":"Schlue, Fabian"},{"last_name":"Stefszky","first_name":"Michael","full_name":"Stefszky, Michael","id":"42777"},{"full_name":"Brecht, Benjamin","first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","id":"27150"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"},{"full_name":"Bartley, Tim","first_name":"Tim","last_name":"Bartley","id":"49683"}],"publication_identifier":{"issn":["2835-0103"]},"year":"2026","title":"Practical considerations for assignment of photon numbers with SNSPDs","intvolume":"         3","date_updated":"2026-03-25T08:00:27Z","publication_status":"published","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1"}],"article_number":"016102","doi":"10.1063/5.0304127","publication":"APL Quantum","issue":"1","abstract":[{"text":"<jats:p>Superconducting nanowire single-photon detectors (SNSPDs) can enable photon-number resolution (PNR) based on accurate measurements of the detector’s response time to few-photon optical pulses. In this work, we investigate the impact of the optical pulse shape and duration on the accuracy of this method. We find that Gaussian temporal pulse shapes yield cleaner arrival-time histograms and, thus, more accurate PNR, compared to bandpass-filtered pulses of equal bandwidth. For low system jitter and an optical pulse duration comparable to the other jitter contributions, photon numbers can be discriminated in our system with a commercial SNSPD. At 60 ps optical pulse duration, photon-number discrimination is significantly reduced. Furthermore, we highlight the importance of using the correct arrival-time histogram model when analyzing photon-number assignment. Using exponentially modified Gaussian distributions, instead of the commonly used Gaussian distributions, we can more accurately determine photon-number misidentification probabilities. Finally, we reconstruct the positive operator-valued measures of the detector, revealing sharp features that indicate the intrinsic PNR capabilities.</jats:p>","lang":"eng"}],"date_created":"2026-01-05T10:00:58Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","status":"public","_id":"63451","publisher":"AIP Publishing","volume":3,"user_id":"27150","citation":{"apa":"Schapeler, T., Mischke, I., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., &#38; Bartley, T. (2026). Practical considerations for assignment of photon numbers with SNSPDs. <i>APL Quantum</i>, <i>3</i>(1), Article 016102. <a href=\"https://doi.org/10.1063/5.0304127\">https://doi.org/10.1063/5.0304127</a>","ieee":"T. Schapeler <i>et al.</i>, “Practical considerations for assignment of photon numbers with SNSPDs,” <i>APL Quantum</i>, vol. 3, no. 1, Art. no. 016102, 2026, doi: <a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>.","short":"T. Schapeler, I. Mischke, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley, APL Quantum 3 (2026).","chicago":"Schapeler, Timon, Isabell Mischke, Fabian Schlue, Michael Stefszky, Benjamin Brecht, Christine Silberhorn, and Tim Bartley. “Practical Considerations for Assignment of Photon Numbers with SNSPDs.” <i>APL Quantum</i> 3, no. 1 (2026). <a href=\"https://doi.org/10.1063/5.0304127\">https://doi.org/10.1063/5.0304127</a>.","mla":"Schapeler, Timon, et al. “Practical Considerations for Assignment of Photon Numbers with SNSPDs.” <i>APL Quantum</i>, vol. 3, no. 1, 016102, AIP Publishing, 2026, doi:<a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>.","ama":"Schapeler T, Mischke I, Schlue F, et al. Practical considerations for assignment of photon numbers with SNSPDs. <i>APL Quantum</i>. 2026;3(1). doi:<a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>","bibtex":"@article{Schapeler_Mischke_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2026, title={Practical considerations for assignment of photon numbers with SNSPDs}, volume={3}, DOI={<a href=\"https://doi.org/10.1063/5.0304127\">10.1063/5.0304127</a>}, number={1016102}, journal={APL Quantum}, publisher={AIP Publishing}, author={Schapeler, Timon and Mischke, Isabell and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Bartley, Tim}, year={2026} }"},"project":[{"_id":"191","name":"PhoQuant: Photonische Quantencomputer -  Quantencomputing Testplattform"},{"_id":"239","name":"ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications"}],"oa":"1"},{"citation":{"ieee":"L. M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, and C. Silberhorn, “Experimental entropic uncertainty relations in dimensions three to five,” <i>Physical Review A</i>, vol. 113, no. 3, Art. no. 032420, 2026, doi: <a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>.","apa":"Serino, L. M., Chesi, G., Brecht, B., Maccone, L., Macchiavello, C., &#38; Silberhorn, C. (2026). Experimental entropic uncertainty relations in dimensions three to five. <i>Physical Review A</i>, <i>113</i>(3), Article 032420. <a href=\"https://doi.org/10.1103/f6c4-jtlc\">https://doi.org/10.1103/f6c4-jtlc</a>","mla":"Serino, Laura Maria, et al. “Experimental Entropic Uncertainty Relations in Dimensions Three to Five.” <i>Physical Review A</i>, vol. 113, no. 3, 032420, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>.","bibtex":"@article{Serino_Chesi_Brecht_Maccone_Macchiavello_Silberhorn_2026, title={Experimental entropic uncertainty relations in dimensions three to five}, volume={113}, DOI={<a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>}, number={3032420}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Serino, Laura Maria and Chesi, Giovanni and Brecht, Benjamin and Maccone, Lorenzo and Macchiavello, Chiara and Silberhorn, Christine}, year={2026} }","ama":"Serino LM, Chesi G, Brecht B, Maccone L, Macchiavello C, Silberhorn C. Experimental entropic uncertainty relations in dimensions three to five. <i>Physical Review A</i>. 2026;113(3). doi:<a href=\"https://doi.org/10.1103/f6c4-jtlc\">10.1103/f6c4-jtlc</a>","short":"L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn, Physical Review A 113 (2026).","chicago":"Serino, Laura Maria, Giovanni Chesi, Benjamin Brecht, Lorenzo Maccone, Chiara Macchiavello, and Christine Silberhorn. “Experimental Entropic Uncertainty Relations in Dimensions Three to Five.” <i>Physical Review A</i> 113, no. 3 (2026). <a href=\"https://doi.org/10.1103/f6c4-jtlc\">https://doi.org/10.1103/f6c4-jtlc</a>."},"status":"public","user_id":"27150","volume":113,"_id":"65095","publisher":"American Physical Society (APS)","abstract":[{"text":"<jats:p>\r\n                    We provide experimental validation of tight entropic uncertainty relations for the Shannon entropies of observables with mutually unbiased eigenstates in high dimensions. In particular, we address the cases of dimensions\r\n                    <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\">\r\n                      <a:mrow>\r\n                        <a:mi>d</a:mi>\r\n                        <a:mo>=</a:mo>\r\n                        <a:mn>3</a:mn>\r\n                      </a:mrow>\r\n                    </a:math>\r\n                    , 4, and 5 and consider from 2 to\r\n                    <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\">\r\n                      <b:mrow>\r\n                        <b:mi>d</b:mi>\r\n                        <b:mo>+</b:mo>\r\n                        <b:mn>1</b:mn>\r\n                      </b:mrow>\r\n                    </b:math>\r\n                    mutually unbiased bases. The experiment is based on pulsed frequency bins measured with a multioutput quantum pulse gate, which can perform projective measurements on a complete high-dimensional basis in the time-frequency domain. Our results fit the theoretical predictions: the bound on the sum of the entropies is never violated and is saturated by the states that minimize the uncertainty relations.\r\n                  </jats:p>","lang":"eng"}],"issue":"3","publication":"Physical Review A","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"date_created":"2026-03-23T12:29:23Z","publication_status":"published","date_updated":"2026-03-25T07:59:36Z","intvolume":"       113","year":"2026","title":"Experimental entropic uncertainty relations in dimensions three to five","author":[{"full_name":"Serino, Laura Maria","first_name":"Laura Maria","last_name":"Serino","id":"88242"},{"last_name":"Chesi","first_name":"Giovanni","full_name":"Chesi, Giovanni"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 "},{"full_name":"Maccone, Lorenzo","first_name":"Lorenzo","last_name":"Maccone"},{"first_name":"Chiara","last_name":"Macchiavello","full_name":"Macchiavello, Chiara"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"doi":"10.1103/f6c4-jtlc","article_number":"032420","language":[{"iso":"eng"}]},{"doi":"10.1117/12.3095416","user_id":"30525","editor":[{"last_name":"Razeghi","first_name":"Manijeh","full_name":"Razeghi, Manijeh"},{"full_name":"Khodaparast, Giti A.","first_name":"Giti A.","last_name":"Khodaparast"},{"full_name":"Vitiello, Miriam S.","last_name":"Vitiello","first_name":"Miriam S."}],"_id":"65357","publisher":"SPIE","language":[{"iso":"eng"}],"date_updated":"2026-04-07T04:30:07Z","publication_status":"published","title":"Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting","status":"public","year":"2026","author":[{"first_name":"Minjun","last_name":"Kim","full_name":"Kim, Minjun"},{"full_name":"Devaraj, Vasanthan","last_name":"Devaraj","first_name":"Vasanthan"},{"full_name":"Seo, Hyeon-Seok","last_name":"Seo","first_name":"Hyeon-Seok"},{"full_name":"Eom, Seongjae","first_name":"Seongjae","last_name":"Eom"},{"full_name":"Lee, Jeong-Su","last_name":"Lee","first_name":"Jeong-Su"},{"last_name":"Lee","first_name":"Donghan","full_name":"Lee, Donghan"},{"full_name":"Zentgraf, Thomas","last_name":"Zentgraf","first_name":"Thomas","orcid":"0000-0002-8662-1101","id":"30525"},{"full_name":"Lee, Jong-Min","last_name":"Lee","first_name":"Jong-Min"},{"first_name":"Min Yong","last_name":"Jeon","full_name":"Jeon, Min Yong"}],"type":"conference","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"date_created":"2026-04-07T04:29:28Z","publication":"Quantum Sensing and Nano Electronics and Photonics XXII","citation":{"ieee":"M. Kim <i>et al.</i>, “Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting,” in <i>Quantum Sensing and Nano Electronics and Photonics XXII</i>, 2026, doi: <a href=\"https://doi.org/10.1117/12.3095416\">10.1117/12.3095416</a>.","apa":"Kim, M., Devaraj, V., Seo, H.-S., Eom, S., Lee, J.-S., Lee, D., Zentgraf, T., Lee, J.-M., &#38; Jeon, M. Y. (2026). Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting. In M. Razeghi, G. A. Khodaparast, &#38; M. S. Vitiello (Eds.), <i>Quantum Sensing and Nano Electronics and Photonics XXII</i>. SPIE. <a href=\"https://doi.org/10.1117/12.3095416\">https://doi.org/10.1117/12.3095416</a>","mla":"Kim, Minjun, et al. “Fabrication of Uniform, High-Field-Enhanced Plasmonic Satellite Clusters Using Multidewetting.” <i>Quantum Sensing and Nano Electronics and Photonics XXII</i>, edited by Manijeh Razeghi et al., SPIE, 2026, doi:<a href=\"https://doi.org/10.1117/12.3095416\">10.1117/12.3095416</a>.","bibtex":"@inproceedings{Kim_Devaraj_Seo_Eom_Lee_Lee_Zentgraf_Lee_Jeon_2026, title={Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting}, DOI={<a href=\"https://doi.org/10.1117/12.3095416\">10.1117/12.3095416</a>}, booktitle={Quantum Sensing and Nano Electronics and Photonics XXII}, publisher={SPIE}, author={Kim, Minjun and Devaraj, Vasanthan and Seo, Hyeon-Seok and Eom, Seongjae and Lee, Jeong-Su and Lee, Donghan and Zentgraf, Thomas and Lee, Jong-Min and Jeon, Min Yong}, editor={Razeghi, Manijeh and Khodaparast, Giti A. and Vitiello, Miriam S.}, year={2026} }","ama":"Kim M, Devaraj V, Seo H-S, et al. Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting. In: Razeghi M, Khodaparast GA, Vitiello MS, eds. <i>Quantum Sensing and Nano Electronics and Photonics XXII</i>. SPIE; 2026. doi:<a href=\"https://doi.org/10.1117/12.3095416\">10.1117/12.3095416</a>","short":"M. Kim, V. Devaraj, H.-S. Seo, S. Eom, J.-S. Lee, D. Lee, T. Zentgraf, J.-M. Lee, M.Y. Jeon, in: M. Razeghi, G.A. Khodaparast, M.S. Vitiello (Eds.), Quantum Sensing and Nano Electronics and Photonics XXII, SPIE, 2026.","chicago":"Kim, Minjun, Vasanthan Devaraj, Hyeon-Seok Seo, Seongjae Eom, Jeong-Su Lee, Donghan Lee, Thomas Zentgraf, Jong-Min Lee, and Min Yong Jeon. “Fabrication of Uniform, High-Field-Enhanced Plasmonic Satellite Clusters Using Multidewetting.” In <i>Quantum Sensing and Nano Electronics and Photonics XXII</i>, edited by Manijeh Razeghi, Giti A. Khodaparast, and Miriam S. Vitiello. SPIE, 2026. <a href=\"https://doi.org/10.1117/12.3095416\">https://doi.org/10.1117/12.3095416</a>."}},{"doi":"10.1021/acsphotonics.6c00096","main_file_link":[{"url":"https://pubs.acs.org/doi/10.1021/acsphotonics.6c00096"}],"article_number":"acsphotonics.6c00096","language":[{"iso":"eng"}],"date_updated":"2026-04-20T05:01:00Z","publication_status":"published","article_type":"original","title":"Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light","year":"2026","publication_identifier":{"issn":["2330-4022","2330-4022"]},"author":[{"full_name":"Aschwanden, Rebecca","first_name":"Rebecca","last_name":"Aschwanden"},{"last_name":"Claro-Rodríguez","first_name":"Nicolás","full_name":"Claro-Rodríguez, Nicolás"},{"first_name":"Ruizhe","last_name":"Zhao","full_name":"Zhao, Ruizhe"},{"id":"72332","orcid":"0009-0007-5230-0223","last_name":"Kallert","first_name":"Patricia Anna Maria","full_name":"Kallert, Patricia Anna Maria"},{"first_name":"Tobias","last_name":"Krieger","full_name":"Krieger, Tobias"},{"first_name":"Quirin","last_name":"Buchinger","full_name":"Buchinger, Quirin"},{"last_name":"Covre da Silva","first_name":"Saimon F.","full_name":"Covre da Silva, Saimon F."},{"last_name":"Stroj","first_name":"Sandra","full_name":"Stroj, Sandra"},{"full_name":"Rota, Michele","first_name":"Michele","last_name":"Rota"},{"full_name":"Höfling, Sven","first_name":"Sven","last_name":"Höfling"},{"full_name":"Huber-Loyola, Tobias","first_name":"Tobias","last_name":"Huber-Loyola"},{"full_name":"Rastelli, Armando","last_name":"Rastelli","first_name":"Armando"},{"full_name":"Trotta, Rinaldo","last_name":"Trotta","first_name":"Rinaldo"},{"full_name":"Huang, Lingling","first_name":"Lingling","last_name":"Huang"},{"id":"49683","first_name":"Tim","last_name":"Bartley","full_name":"Bartley, Tim"},{"full_name":"Jöns, Klaus","first_name":"Klaus","last_name":"Jöns","id":"85353"},{"id":"30525","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas","full_name":"Zentgraf, Thomas"}],"type":"journal_article","keyword":["metasurface","beamsplitter","interferometer","quantum network","single photons","nanophotonics"],"department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"date_created":"2026-04-20T04:52:59Z","abstract":[{"text":"Beamsplitters represent fundamental components in both classical and quantum optical systems, enabling the distribution of light, as well as the generation of interference, superposition, and entanglement. However, optical networks constructed from conventional bulk 2 × 2-beamsplitters encounter inherent scalability issues, as the number of required beamsplitters scales quadratically with the number of optical modes for a fully connected network. Metasurfaces offer a promising route to\r\novercome these constraints. By manipulating light at the wavelength scale, compact optical components with advanced functionalities can be constructed, which address several modes simultaneously. In this work, we design and experimentally utilize a metasurface as a multiport beamsplitter. Furthermore, we realized a multimode interferometer composed of two cascaded metasurfaces. We characterize the individual and cascaded metasurfaces by using classical light, showing controllable splitting ratios through tunable phase relations. We then expand the approach to quantum light, employing single photons to demonstrate second- and third-order photon correlations as well as single photon interference across multiple spatial paths. These results establish metasurface-based multiport beamsplitters as a scalable and reconfigurable platform bridging classical and quantum photonics. ","lang":"eng"}],"publication":"ACS Photonics","user_id":"30525","_id":"65460","publisher":"American Chemical Society (ACS)","status":"public","external_id":{"arxiv":["2603.25090"]},"quality_controlled":"1","project":[{"name":"TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142; TP A08: Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten","_id":"65"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"}],"citation":{"short":"R. Aschwanden, N. Claro-Rodríguez, R. Zhao, P.A.M. Kallert, T. Krieger, Q. Buchinger, S.F. Covre da Silva, S. Stroj, M. Rota, S. Höfling, T. Huber-Loyola, A. Rastelli, R. Trotta, L. Huang, T. Bartley, K. Jöns, T. Zentgraf, ACS Photonics (2026).","chicago":"Aschwanden, Rebecca, Nicolás Claro-Rodríguez, Ruizhe Zhao, Patricia Anna Maria Kallert, Tobias Krieger, Quirin Buchinger, Saimon F. Covre da Silva, et al. “Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light.” <i>ACS Photonics</i>, 2026. <a href=\"https://doi.org/10.1021/acsphotonics.6c00096\">https://doi.org/10.1021/acsphotonics.6c00096</a>.","ieee":"R. Aschwanden <i>et al.</i>, “Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light,” <i>ACS Photonics</i>, Art. no. acsphotonics.6c00096, 2026, doi: <a href=\"https://doi.org/10.1021/acsphotonics.6c00096\">10.1021/acsphotonics.6c00096</a>.","apa":"Aschwanden, R., Claro-Rodríguez, N., Zhao, R., Kallert, P. A. M., Krieger, T., Buchinger, Q., Covre da Silva, S. F., Stroj, S., Rota, M., Höfling, S., Huber-Loyola, T., Rastelli, A., Trotta, R., Huang, L., Bartley, T., Jöns, K., &#38; Zentgraf, T. (2026). Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light. <i>ACS Photonics</i>, Article acsphotonics.6c00096. <a href=\"https://doi.org/10.1021/acsphotonics.6c00096\">https://doi.org/10.1021/acsphotonics.6c00096</a>","bibtex":"@article{Aschwanden_Claro-Rodríguez_Zhao_Kallert_Krieger_Buchinger_Covre da Silva_Stroj_Rota_Höfling_et al._2026, title={Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light}, DOI={<a href=\"https://doi.org/10.1021/acsphotonics.6c00096\">10.1021/acsphotonics.6c00096</a>}, number={acsphotonics.6c00096}, journal={ACS Photonics}, publisher={American Chemical Society (ACS)}, author={Aschwanden, Rebecca and Claro-Rodríguez, Nicolás and Zhao, Ruizhe and Kallert, Patricia Anna Maria and Krieger, Tobias and Buchinger, Quirin and Covre da Silva, Saimon F. and Stroj, Sandra and Rota, Michele and Höfling, Sven and et al.}, year={2026} }","ama":"Aschwanden R, Claro-Rodríguez N, Zhao R, et al. Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light. <i>ACS Photonics</i>. Published online 2026. doi:<a href=\"https://doi.org/10.1021/acsphotonics.6c00096\">10.1021/acsphotonics.6c00096</a>","mla":"Aschwanden, Rebecca, et al. “Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light.” <i>ACS Photonics</i>, acsphotonics.6c00096, American Chemical Society (ACS), 2026, doi:<a href=\"https://doi.org/10.1021/acsphotonics.6c00096\">10.1021/acsphotonics.6c00096</a>."}},{"main_file_link":[{"url":"https://pubs.acs.org/doi/10.1021/acsphotonics.5c02865"}],"language":[{"iso":"eng"}],"doi":"10.1021/acsphotonics.5c02865","year":"2026","title":"Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling","publication_identifier":{"issn":["2330-4022","2330-4022"]},"author":[{"full_name":"Wetter, Helene","last_name":"Wetter","first_name":"Helene"},{"id":"69187","last_name":"Wingenbach","first_name":"Jan","full_name":"Wingenbach, Jan"},{"full_name":"Rehberg, Falk","first_name":"Falk","last_name":"Rehberg"},{"full_name":"Gao, Wenlong","last_name":"Gao","first_name":"Wenlong"},{"id":"27271","first_name":"Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan"},{"id":"30525","full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas"}],"date_updated":"2026-04-20T05:09:57Z","publication_status":"published","intvolume":"        13","date_created":"2026-04-02T07:25:30Z","keyword":["metasurface","waveguides","Dirac point","polarization","negative coupling"],"type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"publication":"ACS Photonics","abstract":[{"text":"Metasurfaces are powerful tools for manipulating light using small structures on the nanoscale. In most metasurfaces, near-field couplings are treated as being unfavorable perturbations. Here, we experimentally investigate a structure consisting of sinusoidally modulated silicon waveguides where near-field coupling of local resonances leads to negative coupling, i.e., a negative coupling constant. This gives rise to wave-vector-dependent eigenstates of elliptical, linear, and circular polarizations. In particular, fully circular polarization states are not only present at a single point in momentum space (k-space) but also along a line. This circular polarization line, as well as a linear polarization line, emanates from a polarization degeneracy at the Dirac point. We experimentally validate the existence of these eigenstates and demonstrate the energy-, polarization-, and wave vector dependence of this metasurface as well as its sensitivity to fabrication tolerances. By tuning the incident k-vector, certain polarization-energy eigenstates are strongly reflected, allowing for uses in angle-tunable polarization filters and light sources.","lang":"eng"}],"page":"2128-2133","_id":"65316","publisher":"American Chemical Society (ACS)","user_id":"30525","volume":13,"status":"public","external_id":{"arxiv":["2512.14452"]},"citation":{"ieee":"H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, and T. Zentgraf, “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling,” <i>ACS Photonics</i>, vol. 13, pp. 2128–2133, 2026, doi: <a href=\"https://doi.org/10.1021/acsphotonics.5c02865\">10.1021/acsphotonics.5c02865</a>.","apa":"Wetter, H., Wingenbach, J., Rehberg, F., Gao, W., Schumacher, S., &#38; Zentgraf, T. (2026). Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. <i>ACS Photonics</i>, <i>13</i>, 2128–2133. <a href=\"https://doi.org/10.1021/acsphotonics.5c02865\">https://doi.org/10.1021/acsphotonics.5c02865</a>","short":"H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, T. Zentgraf, ACS Photonics 13 (2026) 2128–2133.","chicago":"Wetter, Helene, Jan Wingenbach, Falk Rehberg, Wenlong Gao, Stefan Schumacher, and Thomas Zentgraf. “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling.” <i>ACS Photonics</i> 13 (2026): 2128–33. <a href=\"https://doi.org/10.1021/acsphotonics.5c02865\">https://doi.org/10.1021/acsphotonics.5c02865</a>.","mla":"Wetter, Helene, et al. “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling.” <i>ACS Photonics</i>, vol. 13, American Chemical Society (ACS), 2026, pp. 2128–33, doi:<a href=\"https://doi.org/10.1021/acsphotonics.5c02865\">10.1021/acsphotonics.5c02865</a>.","bibtex":"@article{Wetter_Wingenbach_Rehberg_Gao_Schumacher_Zentgraf_2026, title={Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling}, volume={13}, DOI={<a href=\"https://doi.org/10.1021/acsphotonics.5c02865\">10.1021/acsphotonics.5c02865</a>}, journal={ACS Photonics}, publisher={American Chemical Society (ACS)}, author={Wetter, Helene and Wingenbach, Jan and Rehberg, Falk and Gao, Wenlong and Schumacher, Stefan and Zentgraf, Thomas}, year={2026}, pages={2128–2133} }","ama":"Wetter H, Wingenbach J, Rehberg F, Gao W, Schumacher S, Zentgraf T. Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. <i>ACS Photonics</i>. 2026;13:2128-2133. doi:<a href=\"https://doi.org/10.1021/acsphotonics.5c02865\">10.1021/acsphotonics.5c02865</a>"},"quality_controlled":"1"},{"abstract":[{"lang":"eng","text":"We present an extremely simple polynomial-space exponential-time\r\n$(1-\\varepsilon)$-approximation algorithm for MAX-k-SAT that is (slightly)\r\nfaster than the previous known polynomial-space $(1-\\varepsilon)$-approximation\r\nalgorithms by Hirsch (Discrete Applied Mathematics, 2003) and Escoffier,\r\nPaschos and Tourniaire (Theoretical Computer Science, 2014). Our algorithm\r\nrepeatedly samples an assignment uniformly at random until finding an\r\nassignment that satisfies a large enough fraction of clauses. Surprisingly, we\r\ncan show the efficiency of this simpler approach by proving that in any\r\ninstance of MAX-k-SAT (or more generally any instance of MAXCSP), an\r\nexponential number of assignments satisfy a fraction of clauses close to the\r\noptimal value."}],"publication":"SIAM Symposium on Simplicity in Algorithms (SOSA)","citation":{"apa":"Buhrman, H., Gharibian, S., Landau, Z., Gall, F. L., Schuch, N., &#38; Tamaki, S. (n.d.). A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT. <i>SIAM Symposium on Simplicity in Algorithms (SOSA)</i>, 247–253.","ieee":"H. Buhrman, S. Gharibian, Z. Landau, F. L. Gall, N. Schuch, and S. Tamaki, “A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT,” in <i>SIAM Symposium on Simplicity in Algorithms (SOSA)</i>, pp. 247–253.","short":"H. Buhrman, S. Gharibian, Z. Landau, F.L. Gall, N. Schuch, S. Tamaki, in: SIAM Symposium on Simplicity in Algorithms (SOSA), n.d., pp. 247–253.","chicago":"Buhrman, Harry, Sevag Gharibian, Zeph Landau, François Le Gall, Norbert Schuch, and Suguru Tamaki. “A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT.” In <i>SIAM Symposium on Simplicity in Algorithms (SOSA)</i>, 247–53, n.d.","mla":"Buhrman, Harry, et al. “A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT.” <i>SIAM Symposium on Simplicity in Algorithms (SOSA)</i>, pp. 247–53.","ama":"Buhrman H, Gharibian S, Landau Z, Gall FL, Schuch N, Tamaki S. A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT. In: <i>SIAM Symposium on Simplicity in Algorithms (SOSA)</i>. ; :247-253.","bibtex":"@inproceedings{Buhrman_Gharibian_Landau_Gall_Schuch_Tamaki, title={A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT}, booktitle={SIAM Symposium on Simplicity in Algorithms (SOSA)}, author={Buhrman, Harry and Gharibian, Sevag and Landau, Zeph and Gall, François Le and Schuch, Norbert and Tamaki, Suguru}, pages={247–253} }"},"type":"conference","department":[{"_id":"7"},{"_id":"623"}],"external_id":{"arxiv":["2510.18164"]},"date_created":"2025-10-22T09:33:22Z","publication_status":"inpress","date_updated":"2026-04-20T13:53:03Z","status":"public","title":"A Simpler Exponential-Time Approximation Algorithm for MAX-k-SAT","year":"2026","author":[{"full_name":"Buhrman, Harry","first_name":"Harry","last_name":"Buhrman"},{"id":"71541","full_name":"Gharibian, Sevag","orcid":"0000-0002-9992-3379","first_name":"Sevag","last_name":"Gharibian"},{"first_name":"Zeph","last_name":"Landau","full_name":"Landau, Zeph"},{"first_name":"François Le","last_name":"Gall","full_name":"Gall, François Le"},{"full_name":"Schuch, Norbert","last_name":"Schuch","first_name":"Norbert"},{"first_name":"Suguru","last_name":"Tamaki","full_name":"Tamaki, Suguru"}],"user_id":"71541","page":"247-253","_id":"61922","language":[{"iso":"eng"}]},{"publisher":"Springer Nature Switzerland","_id":"65518","language":[{"iso":"eng"}],"doi":"10.1007/978-3-032-08340-1_4","user_id":"13256","editor":[{"full_name":"Scheytt, J. Christoph","first_name":"J. Christoph","last_name":"Scheytt"},{"full_name":"Kress, Christian","last_name":"Kress","first_name":"Christian"},{"first_name":"Manfred","last_name":"Berroth","full_name":"Berroth, Manfred"},{"last_name":"Pachnicke","first_name":"Stephan","full_name":"Pachnicke, Stephan"},{"full_name":"Witzens, Jeremy","last_name":"Witzens","first_name":"Jeremy"}],"status":"public","year":"2026","title":"Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter","author":[{"last_name":"Scheytt","first_name":"J. Christoph","orcid":"0000-0002-5950-6618 ","full_name":"Scheytt, J. Christoph","id":"37144"},{"id":"39217","last_name":"Schwabe","first_name":"Tobias","full_name":"Schwabe, Tobias"},{"last_name":"Singh","first_name":"Karanveer","full_name":"Singh, Karanveer"},{"orcid":"0000-0002-4403-2237","last_name":"Kress","first_name":"Christian","full_name":"Kress, Christian","id":"13256"},{"full_name":"Schneider, Thomas","first_name":"Thomas","last_name":"Schneider"}],"publication_identifier":{"isbn":["9783032083395","9783032083401"]},"date_updated":"2026-04-29T14:28:40Z","publication_status":"published","place":"Cham","date_created":"2026-04-29T14:14:21Z","type":"book_chapter","department":[{"_id":"58"},{"_id":"623"}],"publication":"Electronic-Photonic Integrated Systems for Ultrafast Signal Processing","citation":{"short":"J.C. Scheytt, T. Schwabe, K. Singh, C. Kress, T. Schneider, in: J.C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, J. Witzens (Eds.), Electronic-Photonic Integrated Systems for Ultrafast Signal Processing, Springer Nature Switzerland, Cham, 2026.","chicago":"Scheytt, J. Christoph, Tobias Schwabe, Karanveer Singh, Christian Kress, and Thomas Schneider. “Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter.” In <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>, edited by J. Christoph Scheytt, Christian Kress, Manfred Berroth, Stephan Pachnicke, and Jeremy Witzens. Cham: Springer Nature Switzerland, 2026. <a href=\"https://doi.org/10.1007/978-3-032-08340-1_4\">https://doi.org/10.1007/978-3-032-08340-1_4</a>.","ieee":"J. C. Scheytt, T. Schwabe, K. Singh, C. Kress, and T. Schneider, “Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter,” in <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>, J. C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, and J. Witzens, Eds. Cham: Springer Nature Switzerland, 2026.","apa":"Scheytt, J. C., Schwabe, T., Singh, K., Kress, C., &#38; Schneider, T. (2026). Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter. In J. C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, &#38; J. Witzens (Eds.), <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Springer Nature Switzerland. <a href=\"https://doi.org/10.1007/978-3-032-08340-1_4\">https://doi.org/10.1007/978-3-032-08340-1_4</a>","bibtex":"@inbook{Scheytt_Schwabe_Singh_Kress_Schneider_2026, place={Cham}, title={Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter}, DOI={<a href=\"https://doi.org/10.1007/978-3-032-08340-1_4\">10.1007/978-3-032-08340-1_4</a>}, booktitle={Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}, publisher={Springer Nature Switzerland}, author={Scheytt, J. Christoph and Schwabe, Tobias and Singh, Karanveer and Kress, Christian and Schneider, Thomas}, editor={Scheytt, J. Christoph and Kress, Christian and Berroth, Manfred and Pachnicke, Stephan and Witzens, Jeremy}, year={2026} }","ama":"Scheytt JC, Schwabe T, Singh K, Kress C, Schneider T. Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter. In: Scheytt JC, Kress C, Berroth M, Pachnicke S, Witzens J, eds. <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Springer Nature Switzerland; 2026. doi:<a href=\"https://doi.org/10.1007/978-3-032-08340-1_4\">10.1007/978-3-032-08340-1_4</a>","mla":"Scheytt, J. Christoph, et al. “Precise Optical Nyquist Pulse Synthesizer Digital-to-Analog Converter.” <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>, edited by J. Christoph Scheytt et al., Springer Nature Switzerland, 2026, doi:<a href=\"https://doi.org/10.1007/978-3-032-08340-1_4\">10.1007/978-3-032-08340-1_4</a>."},"abstract":[{"text":"<jats:title>Abstract</jats:title>\r\n                  <jats:p>Optically assisted digital-to-analog converters (DACs) using Nyquist pulse sequences (NPSs) are presented and investigated. Therefore, NPSs are mathematically described and analyzed. Based on this, the operating principle of a precise optical Nyquist pulse synthesizer digital-to-analog converter (PONyDAC) is described. Possible architectures of PONyDAC are derived and compared in terms of performance and practicability. Moreover, the limits of PONyDAC systems and their superiority over classical electronic DACs are discussed. Furthermore, discrete building-block based implementations and monolithic implementations in electronic-photonic integrated circuits (EPICs) are presented. To enable a practicable monolithic integration, a shrinkage of the Mach-Zehnder modulators (MZMs) has been performed by applying forward-biased phase shifters (FB-PSs). These FB-PSs are analyzed and modeled to allow the precise and reliable design of PONyDAC systems with multiple MZMs. Finally, data conversion and data transmission experiments are carried out to demonstrate the systems functionality, quantify its performance, and prove their superiority over purely electronic DACs.</jats:p>","lang":"eng"}]},{"citation":{"ama":"Scheytt JC, Kress C, Berroth M, Pachnicke S, Witzens J, eds. <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Springer Nature Switzerland; 2026. doi:<a href=\"https://doi.org/10.1007/978-3-032-08340-1\">10.1007/978-3-032-08340-1</a>","bibtex":"@book{Scheytt_Kress_Berroth_Pachnicke_Witzens_2026, place={Cham}, title={Electronic-Photonic Integrated Systems for Ultrafast Signal Processing}, DOI={<a href=\"https://doi.org/10.1007/978-3-032-08340-1\">10.1007/978-3-032-08340-1</a>}, publisher={Springer Nature Switzerland}, year={2026} }","mla":"Scheytt, J. Christoph, et al., editors. <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Springer Nature Switzerland, 2026, doi:<a href=\"https://doi.org/10.1007/978-3-032-08340-1\">10.1007/978-3-032-08340-1</a>.","short":"J.C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, J. Witzens, eds., Electronic-Photonic Integrated Systems for Ultrafast Signal Processing, Springer Nature Switzerland, Cham, 2026.","chicago":"Scheytt, J. Christoph, Christian Kress, Manfred Berroth, Stephan Pachnicke, and Jeremy Witzens, eds. <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Cham: Springer Nature Switzerland, 2026. <a href=\"https://doi.org/10.1007/978-3-032-08340-1\">https://doi.org/10.1007/978-3-032-08340-1</a>.","apa":"Scheytt, J. C., Kress, C., Berroth, M., Pachnicke, S., &#38; Witzens, J. (Eds.). (2026). <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Springer Nature Switzerland. <a href=\"https://doi.org/10.1007/978-3-032-08340-1\">https://doi.org/10.1007/978-3-032-08340-1</a>","ieee":"J. C. Scheytt, C. Kress, M. Berroth, S. Pachnicke, and J. Witzens, Eds., <i>Electronic-Photonic Integrated Systems for Ultrafast Signal Processing</i>. Cham: Springer Nature Switzerland, 2026."},"date_created":"2026-03-31T09:02:20Z","place":"Cham","department":[{"_id":"58"},{"_id":"623"}],"type":"book_editor","publication_identifier":{"isbn":["9783032083395","9783032083401"]},"year":"2026","title":"Electronic-Photonic Integrated Systems for Ultrafast Signal Processing","status":"public","publication_status":"published","date_updated":"2026-04-30T06:10:44Z","_id":"65256","language":[{"iso":"eng"}],"publisher":"Springer Nature Switzerland","editor":[{"full_name":"Scheytt, J. Christoph","first_name":"J. Christoph","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","id":"37144"},{"full_name":"Kress, Christian","last_name":"Kress","first_name":"Christian","orcid":"0000-0002-4403-2237","id":"13256"},{"full_name":"Berroth, Manfred","first_name":"Manfred","last_name":"Berroth"},{"last_name":"Pachnicke","first_name":"Stephan","full_name":"Pachnicke, Stephan"},{"full_name":"Witzens, Jeremy","last_name":"Witzens","first_name":"Jeremy"}],"user_id":"13256","doi":"10.1007/978-3-032-08340-1"},{"publication":"Physical Review Applied","issue":"5","abstract":[{"lang":"eng","text":"<jats:p>For the ever-growing field of quantum information processing, large-scale, efficient multiport interferometers serving as photonic processors are required. In this context, the suitability of quantum walks as the interferometric base for universal computation has been theoretically proven. In this work, we bridge the gap between theoretical proposals and state-of-the-art experimental capabilities by providing the recipe for the implementation of a universal photonic processor in discrete-time quantum walks. Specifically, we present the protocol for translating arbitrary linear transformations into the coin and step operator of a quantum walk and map these to the experimental parameters of the established time-multiplexed platform [A. Schreiber , Phys. Rev. Lett. , 050502 (2010)]. We show that our interface is highly scalable and resource efficient due to the hybrid encoding consisting of multiple degrees of freedom. Finally, we prove that our system is highly resilient against experimental imperfections and show that it compares favorably against existing architectures.</jats:p>"}],"date_created":"2026-05-07T07:00:08Z","type":"journal_article","department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"}],"year":"2026","title":"Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures","author":[{"last_name":"Lammers","first_name":"Jonas","full_name":"Lammers, Jonas"},{"full_name":"Ares, Laura","last_name":"Ares","first_name":"Laura"},{"last_name":"Pegoraro","first_name":"Federico","full_name":"Pegoraro, Federico","id":"88928"},{"id":"68236","full_name":"Held, Philip","first_name":"Philip","last_name":"Held"},{"id":"27150","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin"},{"full_name":"Sperling, Jan","first_name":"Jan","last_name":"Sperling","orcid":"0000-0002-5844-3205","id":"75127"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["2331-7019"]},"date_updated":"2026-05-07T07:01:09Z","publication_status":"published","intvolume":"        25","article_number":"054011","language":[{"iso":"eng"}],"doi":"10.1103/x99y-2sms","citation":{"ieee":"J. Lammers <i>et al.</i>, “Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures,” <i>Physical Review Applied</i>, vol. 25, no. 5, Art. no. 054011, 2026, doi: <a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>.","apa":"Lammers, J., Ares, L., Pegoraro, F., Held, P., Brecht, B., Sperling, J., &#38; Silberhorn, C. (2026). Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures. <i>Physical Review Applied</i>, <i>25</i>(5), Article 054011. <a href=\"https://doi.org/10.1103/x99y-2sms\">https://doi.org/10.1103/x99y-2sms</a>","short":"J. Lammers, L. Ares, F. Pegoraro, P. Held, B. Brecht, J. Sperling, C. Silberhorn, Physical Review Applied 25 (2026).","chicago":"Lammers, Jonas, Laura Ares, Federico Pegoraro, Philip Held, Benjamin Brecht, Jan Sperling, and Christine Silberhorn. “Resource-Efficient Universal Photonic Processors Based on Time-Multiplexed Hybrid Architectures.” <i>Physical Review Applied</i> 25, no. 5 (2026). <a href=\"https://doi.org/10.1103/x99y-2sms\">https://doi.org/10.1103/x99y-2sms</a>.","mla":"Lammers, Jonas, et al. “Resource-Efficient Universal Photonic Processors Based on Time-Multiplexed Hybrid Architectures.” <i>Physical Review Applied</i>, vol. 25, no. 5, 054011, American Physical Society (APS), 2026, doi:<a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>.","bibtex":"@article{Lammers_Ares_Pegoraro_Held_Brecht_Sperling_Silberhorn_2026, title={Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures}, volume={25}, DOI={<a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>}, number={5054011}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Lammers, Jonas and Ares, Laura and Pegoraro, Federico and Held, Philip and Brecht, Benjamin and Sperling, Jan and Silberhorn, Christine}, year={2026} }","ama":"Lammers J, Ares L, Pegoraro F, et al. Resource-efficient universal photonic processors based on time-multiplexed hybrid architectures. <i>Physical Review Applied</i>. 2026;25(5). doi:<a href=\"https://doi.org/10.1103/x99y-2sms\">10.1103/x99y-2sms</a>"},"status":"public","_id":"65575","publisher":"American Physical Society (APS)","user_id":"75127","volume":25}]