[{"date_created":"2026-02-02T07:18:03Z","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"61"}],"keyword":["tet_topic_opticalantenna","tet_topic_numerics","tet_topic_meta"],"type":"journal_article","publication":"Photonics","issue":"2","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."}],"language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://www.mdpi.com/2304-6732/13/2/128"}],"article_number":"128","doi":"10.3390/photonics13020128","author":[{"first_name":"Dominik","last_name":"Metzner","full_name":"Metzner, Dominik"},{"full_name":"Potthoff, Jens","last_name":"Potthoff","first_name":"Jens"},{"id":"30525","first_name":"Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","full_name":"Zentgraf, Thomas"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"}],"publication_identifier":{"issn":["2304-6732"]},"title":"Approximating Incoherent Monochromatic Light Sources in FDTD Simulations","year":"2026","intvolume":" 13","article_type":"original","date_updated":"2026-02-02T21:38:34Z","publication_status":"published","oa":"1","citation":{"chicago":"Metzner, Dominik, Jens Potthoff, Thomas Zentgraf, and Jens Förstner. “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations.” Photonics 13, no. 2 (2026). https://doi.org/10.3390/photonics13020128.","short":"D. Metzner, J. Potthoff, T. Zentgraf, J. Förstner, Photonics 13 (2026).","apa":"Metzner, D., Potthoff, J., Zentgraf, T., & Förstner, J. (2026). Approximating Incoherent Monochromatic Light Sources in FDTD Simulations. Photonics, 13(2), Article 128. https://doi.org/10.3390/photonics13020128","ieee":"D. Metzner, J. Potthoff, T. Zentgraf, and J. Förstner, “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations,” Photonics, vol. 13, no. 2, Art. no. 128, 2026, doi: 10.3390/photonics13020128.","ama":"Metzner D, Potthoff J, Zentgraf T, Förstner J. Approximating Incoherent Monochromatic Light Sources in FDTD Simulations. Photonics. 2026;13(2). doi:10.3390/photonics13020128","bibtex":"@article{Metzner_Potthoff_Zentgraf_Förstner_2026, title={Approximating Incoherent Monochromatic Light Sources in FDTD Simulations}, volume={13}, DOI={10.3390/photonics13020128}, number={2128}, journal={Photonics}, publisher={MDPI AG}, author={Metzner, Dominik and Potthoff, Jens and Zentgraf, Thomas and Förstner, Jens}, year={2026} }","mla":"Metzner, Dominik, et al. “Approximating Incoherent Monochromatic Light Sources in FDTD Simulations.” Photonics, vol. 13, no. 2, 128, MDPI AG, 2026, doi:10.3390/photonics13020128."},"quality_controlled":"1","_id":"63827","publisher":"MDPI AG","volume":13,"user_id":"158","status":"public"},{"oa":"1","quality_controlled":"1","citation":{"mla":"Rogers, Andrew, et al. “Polar Discontinuities, Emergent Conductivity, and Critical Twist-Angle-Dependent Behaviour at Wafer-Bonded Ferroelectric Interfaces.” Nature Communications, vol. 17, no. 1, 1842, Springer Science and Business Media LLC, 2026, doi:10.1038/s41467-026-68553-7.","ama":"Rogers A, Holsgrove K, Schäfer NA, et al. Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces. Nature Communications. 2026;17(1). doi:10.1038/s41467-026-68553-7","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={10.1038/s41467-026-68553-7}, 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} }","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. Nature Communications, 17(1), Article 1842. https://doi.org/10.1038/s41467-026-68553-7","ieee":"A. Rogers et al., “Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces,” Nature Communications, vol. 17, no. 1, Art. no. 1842, 2026, doi: 10.1038/s41467-026-68553-7.","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).","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.” Nature Communications 17, no. 1 (2026). https://doi.org/10.1038/s41467-026-68553-7."},"volume":17,"user_id":"22501","publisher":"Springer Science and Business Media LLC","_id":"64864","status":"public","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2026-03-08T09:20:13Z","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."}],"issue":"1","publication":"Nature Communications","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","intvolume":" 17","article_type":"original","date_updated":"2026-03-08T09:22:25Z","publication_status":"published","publication_identifier":{"issn":["2041-1723"]},"author":[{"last_name":"Rogers","first_name":"Andrew","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"},{"last_name":"McCluskey","first_name":"Conor J.","full_name":"McCluskey, Conor J."},{"full_name":"Yedama, Shivani","first_name":"Shivani","last_name":"Yedama"},{"last_name":"Lynch","first_name":"Ronan","full_name":"Lynch, Ronan"},{"last_name":"Sloan","first_name":"Keelan","full_name":"Sloan, Keelan"},{"full_name":"Porter, Barry","first_name":"Barry","last_name":"Porter"},{"full_name":"Sykes, Adam","first_name":"Adam","last_name":"Sykes"},{"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."},{"first_name":"Sam D.","last_name":"Seddon","full_name":"Seddon, Sam D."},{"full_name":"Lu, Haidong","first_name":"Haidong","last_name":"Lu"},{"full_name":"Rüsing, Michael","last_name":"Rüsing","first_name":"Michael","orcid":"0000-0003-4682-4577","id":"22501"},{"last_name":"Fink","first_name":"Christa","full_name":"Fink, Christa"},{"first_name":"Philipp","last_name":"Fahler-Muenzer","full_name":"Fahler-Muenzer, Philipp"},{"full_name":"Fearn, Sarah","last_name":"Fearn","first_name":"Sarah"},{"first_name":"Sandrine E. M.","last_name":"Heutz","full_name":"Heutz, Sandrine E. M."},{"full_name":"Hadjimichael, Marios","first_name":"Marios","last_name":"Hadjimichael"},{"full_name":"Ramasse, Quentin M.","first_name":"Quentin M.","last_name":"Ramasse"},{"full_name":"Alexe, Marin","last_name":"Alexe","first_name":"Marin"},{"first_name":"Amit","last_name":"Kumar","full_name":"Kumar, Amit"},{"full_name":"McQuaid, Raymond G. P.","last_name":"McQuaid","first_name":"Raymond G. P."},{"full_name":"Gruverman, Alexei","last_name":"Gruverman","first_name":"Alexei"},{"last_name":"Sanna","first_name":"Simone","full_name":"Sanna, Simone"},{"last_name":"Eng","first_name":"Lukas M.","full_name":"Eng, Lukas M."},{"full_name":"Gregg, J. Marty","first_name":"J. Marty","last_name":"Gregg"}],"year":"2026","title":"Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces"},{"status":"public","_id":"64873","publisher":"American Chemical Society (ACS)","volume":11,"user_id":"30525","citation":{"mla":"Killi, Naresh, et al. “Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction.” ACS Omega, vol. 11, no. 9, 14448, American Chemical Society (ACS), 2026, doi:10.1021/acsomega.5c09476.","ama":"Killi N, Kumar A, Nebhani L, et al. Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction. ACS Omega. 2026;11(9). doi:10.1021/acsomega.5c09476","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={10.1021/acsomega.5c09476}, 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} }","apa":"Killi, N., Kumar, A., Nebhani, L., Obst, F., Richter, A., Reineke Matsudo, B., Zentgraf, T., & Kuckling, D. (2026). Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction. ACS Omega, 11(9), Article 14448. https://doi.org/10.1021/acsomega.5c09476","ieee":"N. Killi et al., “Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction,” ACS Omega, vol. 11, no. 9, Art. no. 14448, 2026, doi: 10.1021/acsomega.5c09476.","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.” ACS Omega 11, no. 9 (2026). https://doi.org/10.1021/acsomega.5c09476.","short":"N. Killi, A. Kumar, L. Nebhani, F. Obst, A. Richter, B. Reineke Matsudo, T. Zentgraf, D. Kuckling, ACS Omega 11 (2026)."},"quality_controlled":"1","oa":"1","author":[{"full_name":"Killi, Naresh","first_name":"Naresh","last_name":"Killi"},{"last_name":"Kumar","first_name":"Amit","full_name":"Kumar, Amit"},{"first_name":"Leena","last_name":"Nebhani","full_name":"Nebhani, Leena"},{"full_name":"Obst, Franziska","last_name":"Obst","first_name":"Franziska"},{"last_name":"Richter","first_name":"Andreas","full_name":"Richter, Andreas"},{"first_name":"Bernhard","last_name":"Reineke Matsudo","full_name":"Reineke Matsudo, Bernhard"},{"full_name":"Zentgraf, Thomas","last_name":"Zentgraf","first_name":"Thomas","orcid":"0000-0002-8662-1101","id":"30525"},{"id":"287","full_name":"Kuckling, Dirk","last_name":"Kuckling","first_name":"Dirk"}],"publication_identifier":{"issn":["2470-1343","2470-1343"]},"title":"Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction","year":"2026","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":[{"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.","lang":"eng"}],"date_created":"2026-03-10T08:23:43Z","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"2"},{"_id":"311"}],"type":"journal_article"},{"article_number":"e11823","main_file_link":[{"open_access":"1","url":"https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202511823"}],"language":[{"iso":"eng"}],"doi":"10.1002/adma.202511823","title":"Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation","year":"2026","publication_identifier":{"issn":["0935-9648","1521-4095"]},"author":[{"full_name":"Jin, Xiao","first_name":"Xiao","last_name":"Jin"},{"full_name":"Zentgraf, Thomas","last_name":"Zentgraf","first_name":"Thomas","orcid":"0000-0002-8662-1101","id":"30525"}],"publication_status":"published","date_updated":"2026-03-10T08:32:37Z","article_type":"original","intvolume":" 38","date_created":"2025-10-06T05:42:21Z","type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"publication":"Advanced Materials","abstract":[{"lang":"eng","text":"AbstractMetasurface 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."}],"publisher":"Wiley","_id":"61523","user_id":"30525","volume":38,"status":"public","oa":"1","citation":{"bibtex":"@article{Jin_Zentgraf_2026, title={Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation}, volume={38}, DOI={10.1002/adma.202511823}, number={e11823}, journal={Advanced Materials}, publisher={Wiley}, author={Jin, Xiao and Zentgraf, Thomas}, year={2026} }","ama":"Jin X, Zentgraf T. Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation. Advanced Materials. 2026;38. doi:10.1002/adma.202511823","mla":"Jin, Xiao, and Thomas Zentgraf. “Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation.” Advanced Materials, vol. 38, e11823, Wiley, 2026, doi:10.1002/adma.202511823.","chicago":"Jin, Xiao, and Thomas Zentgraf. “Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation.” Advanced Materials 38 (2026). https://doi.org/10.1002/adma.202511823.","short":"X. Jin, T. Zentgraf, Advanced Materials 38 (2026).","ieee":"X. Jin and T. Zentgraf, “Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation,” Advanced Materials, vol. 38, Art. no. e11823, 2026, doi: 10.1002/adma.202511823.","apa":"Jin, X., & Zentgraf, T. (2026). Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation. Advanced Materials, 38, Article e11823. https://doi.org/10.1002/adma.202511823"},"quality_controlled":"1","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"55","name":"TRR 142 - Project Area B"},{"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; TP B09: Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen","_id":"170"}]},{"issue":"02","publication":"Advanced Photonics","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."}],"date_created":"2026-03-16T07:17:52Z","type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"title":"Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection","year":"2026","publication_identifier":{"issn":["2577-5421"]},"author":[{"full_name":"Jin, Xiao","first_name":"Xiao","last_name":"Jin"},{"full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","first_name":"Thomas","last_name":"Zentgraf","id":"30525"}],"date_updated":"2026-03-16T07:20:07Z","publication_status":"published","intvolume":" 8","article_type":"original","main_file_link":[{"url":"https://www.researching.cn/Articles/OJafd1e3b9e643c6be","open_access":"1"}],"article_number":"26010","language":[{"iso":"eng"}],"doi":"10.1117/1.ap.8.2.026010","citation":{"apa":"Jin, X., & Zentgraf, T. (2026). Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection. Advanced Photonics, 8(02), Article 26010. https://doi.org/10.1117/1.ap.8.2.026010","ieee":"X. Jin and T. Zentgraf, “Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection,” Advanced Photonics, vol. 8, no. 02, Art. no. 26010, 2026, doi: 10.1117/1.ap.8.2.026010.","chicago":"Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom for Polarization through Multilayer Synchronous Polarization Projection.” Advanced Photonics 8, no. 02 (2026). https://doi.org/10.1117/1.ap.8.2.026010.","short":"X. Jin, T. Zentgraf, Advanced Photonics 8 (2026).","mla":"Jin, Xiao, and Thomas Zentgraf. “Increasing the Design Degree of Freedom for Polarization through Multilayer Synchronous Polarization Projection.” Advanced Photonics, vol. 8, no. 02, 26010, SPIE-Intl Soc Optical Eng, 2026, doi:10.1117/1.ap.8.2.026010.","ama":"Jin X, Zentgraf T. Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection. Advanced Photonics. 2026;8(02). doi:10.1117/1.ap.8.2.026010","bibtex":"@article{Jin_Zentgraf_2026, title={Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection}, volume={8}, DOI={10.1117/1.ap.8.2.026010}, number={0226010}, journal={Advanced Photonics}, publisher={SPIE-Intl Soc Optical Eng}, author={Jin, Xiao and Zentgraf, Thomas}, year={2026} }"},"quality_controlled":"1","oa":"1","status":"public","publisher":"SPIE-Intl Soc Optical Eng","_id":"64978","user_id":"30525","volume":8},{"publisher":"American Physical Society (APS)","_id":"65094","user_id":"27150","volume":25,"status":"public","citation":{"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.” Physical Review Applied 25, no. 3 (2026). https://doi.org/10.1103/cwsx-42c4.","apa":"Roeder, F., Pollmann, R., Quiring, V., Eigner, C., Brecht, B., & Silberhorn, C. (2026). Toward integrated sensors for optimized optical coherence tomography with undetected photons. Physical Review Applied, 25(3), Article 034031. https://doi.org/10.1103/cwsx-42c4","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,” Physical Review Applied, vol. 25, no. 3, Art. no. 034031, 2026, doi: 10.1103/cwsx-42c4.","ama":"Roeder F, Pollmann R, Quiring V, Eigner C, Brecht B, Silberhorn C. Toward integrated sensors for optimized optical coherence tomography with undetected photons. Physical Review Applied. 2026;25(3). doi:10.1103/cwsx-42c4","bibtex":"@article{Roeder_Pollmann_Quiring_Eigner_Brecht_Silberhorn_2026, title={Toward integrated sensors for optimized optical coherence tomography with undetected photons}, volume={25}, DOI={10.1103/cwsx-42c4}, 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.” Physical Review Applied, vol. 25, no. 3, 034031, American Physical Society (APS), 2026, doi:10.1103/cwsx-42c4."},"article_number":"034031","language":[{"iso":"eng"}],"doi":"10.1103/cwsx-42c4","year":"2026","title":"Toward integrated sensors for optimized optical coherence tomography with undetected photons","publication_identifier":{"issn":["2331-7019"]},"author":[{"id":"88149","first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz"},{"full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René","id":"78890"},{"last_name":"Quiring","first_name":"Viktor","full_name":"Quiring, Viktor"},{"id":"13244","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof"},{"first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin","id":"27150"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"}],"publication_status":"published","date_updated":"2026-03-25T07:59:04Z","intvolume":" 25","date_created":"2026-03-23T12:28:33Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"publication":"Physical Review Applied","issue":"3","abstract":[{"text":"\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 \r\n Ti\r\n :\r\n \r\n \r\n Li\r\n Nb\r\n O\r\n \r\n 3\r\n \r\n \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 \r\n 28\r\n \r\n μ\r\n \r\n m\r\n \r\n \r\n .\r\n ","lang":"eng"}]},{"type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"date_created":"2026-03-23T12:30:02Z","abstract":[{"text":"\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 Q\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 ","lang":"eng"}],"publication":"Optica","issue":"3","doi":"10.1364/optica.579459","article_number":"548","language":[{"iso":"eng"}],"date_updated":"2026-03-25T07:59:23Z","publication_status":"published","intvolume":" 13","title":"Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals","year":"2026","publication_identifier":{"issn":["2334-2536"]},"author":[{"last_name":"Folge","first_name":"Patrick Fabian","full_name":"Folge, Patrick Fabian","id":"88605"},{"id":"88242","last_name":"Serino","first_name":"Laura Maria","full_name":"Serino, Laura Maria"},{"full_name":"Mišta, Ladislav","last_name":"Mišta","first_name":"Ladislav"},{"id":"27150","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"},{"full_name":"Řeháček, Jaroslav","first_name":"Jaroslav","last_name":"Řeháček"},{"full_name":"Hradil, Zdeněk","first_name":"Zdeněk","last_name":"Hradil"}],"citation":{"mla":"Folge, Patrick Fabian, et al. “Quantum-Limited Detection of the Arrival Time and the Carrier Frequency of Time-Dependent Signals.” Optica, vol. 13, no. 3, 548, Optica Publishing Group, 2026, doi:10.1364/optica.579459.","ama":"Folge PF, Serino LM, Mišta L, et al. Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals. Optica. 2026;13(3). doi:10.1364/optica.579459","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={10.1364/optica.579459}, 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} }","apa":"Folge, P. F., Serino, L. M., Mišta, L., Brecht, B., Silberhorn, C., Řeháček, J., & Hradil, Z. (2026). Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals. Optica, 13(3), Article 548. https://doi.org/10.1364/optica.579459","ieee":"P. F. Folge et al., “Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals,” Optica, vol. 13, no. 3, Art. no. 548, 2026, doi: 10.1364/optica.579459.","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.” Optica 13, no. 3 (2026). https://doi.org/10.1364/optica.579459.","short":"P.F. Folge, L.M. Serino, L. Mišta, B. Brecht, C. Silberhorn, J. Řeháček, Z. Hradil, Optica 13 (2026)."},"user_id":"27150","volume":13,"_id":"65096","publisher":"Optica Publishing Group","status":"public"},{"issue":"1","publication":"APL Quantum","abstract":[{"text":"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.","lang":"eng"}],"date_created":"2026-01-05T10:00:58Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","publication_identifier":{"issn":["2835-0103"]},"author":[{"id":"55629","full_name":"Schapeler, Timon","last_name":"Schapeler","first_name":"Timon","orcid":"0000-0001-7652-1716"},{"first_name":"Isabell","last_name":"Mischke","full_name":"Mischke, Isabell"},{"first_name":"Fabian","last_name":"Schlue","full_name":"Schlue, Fabian","id":"63579"},{"id":"42777","full_name":"Stefszky, Michael","first_name":"Michael","last_name":"Stefszky"},{"id":"27150","full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin"},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"},{"id":"49683","full_name":"Bartley, Tim","last_name":"Bartley","first_name":"Tim"}],"year":"2026","title":"Practical considerations for assignment of photon numbers with SNSPDs","intvolume":" 3","publication_status":"published","date_updated":"2026-03-25T08:00:27Z","language":[{"iso":"eng"}],"article_number":"016102","main_file_link":[{"open_access":"1"}],"doi":"10.1063/5.0304127","citation":{"ama":"Schapeler T, Mischke I, Schlue F, et al. Practical considerations for assignment of photon numbers with SNSPDs. APL Quantum. 2026;3(1). doi:10.1063/5.0304127","bibtex":"@article{Schapeler_Mischke_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2026, title={Practical considerations for assignment of photon numbers with SNSPDs}, volume={3}, DOI={10.1063/5.0304127}, 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} }","mla":"Schapeler, Timon, et al. “Practical Considerations for Assignment of Photon Numbers with SNSPDs.” APL Quantum, vol. 3, no. 1, 016102, AIP Publishing, 2026, doi:10.1063/5.0304127.","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.” APL Quantum 3, no. 1 (2026). https://doi.org/10.1063/5.0304127.","short":"T. Schapeler, I. Mischke, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley, APL Quantum 3 (2026).","apa":"Schapeler, T., Mischke, I., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., & Bartley, T. (2026). Practical considerations for assignment of photon numbers with SNSPDs. APL Quantum, 3(1), Article 016102. https://doi.org/10.1063/5.0304127","ieee":"T. Schapeler et al., “Practical considerations for assignment of photon numbers with SNSPDs,” APL Quantum, vol. 3, no. 1, Art. no. 016102, 2026, doi: 10.1063/5.0304127."},"project":[{"name":"PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform","_id":"191"},{"_id":"239","name":"ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications"}],"oa":"1","status":"public","_id":"63451","publisher":"AIP Publishing","volume":3,"user_id":"27150"},{"citation":{"mla":"Serino, Laura Maria, et al. “Experimental Entropic Uncertainty Relations in Dimensions Three to Five.” Physical Review A, vol. 113, no. 3, 032420, American Physical Society (APS), 2026, doi:10.1103/f6c4-jtlc.","apa":"Serino, L. M., Chesi, G., Brecht, B., Maccone, L., Macchiavello, C., & Silberhorn, C. (2026). Experimental entropic uncertainty relations in dimensions three to five. Physical Review A, 113(3), Article 032420. https://doi.org/10.1103/f6c4-jtlc","ieee":"L. M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, and C. Silberhorn, “Experimental entropic uncertainty relations in dimensions three to five,” Physical Review A, vol. 113, no. 3, Art. no. 032420, 2026, doi: 10.1103/f6c4-jtlc.","ama":"Serino LM, Chesi G, Brecht B, Maccone L, Macchiavello C, Silberhorn C. Experimental entropic uncertainty relations in dimensions three to five. Physical Review A. 2026;113(3). doi:10.1103/f6c4-jtlc","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.” Physical Review A 113, no. 3 (2026). https://doi.org/10.1103/f6c4-jtlc.","bibtex":"@article{Serino_Chesi_Brecht_Maccone_Macchiavello_Silberhorn_2026, title={Experimental entropic uncertainty relations in dimensions three to five}, volume={113}, DOI={10.1103/f6c4-jtlc}, 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} }"},"status":"public","_id":"65095","publisher":"American Physical Society (APS)","volume":113,"user_id":"27150","issue":"3","publication":"Physical Review A","abstract":[{"text":"\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 \r\n \r\n d\r\n =\r\n 3\r\n \r\n \r\n , 4, and 5 and consider from 2 to\r\n \r\n \r\n d\r\n +\r\n 1\r\n \r\n \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 ","lang":"eng"}],"date_created":"2026-03-23T12:29:23Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","publication_identifier":{"issn":["2469-9926","2469-9934"]},"author":[{"id":"88242","first_name":"Laura Maria","last_name":"Serino","full_name":"Serino, Laura Maria"},{"last_name":"Chesi","first_name":"Giovanni","full_name":"Chesi, Giovanni"},{"full_name":"Brecht, Benjamin","last_name":"Brecht","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","id":"27150"},{"first_name":"Lorenzo","last_name":"Maccone","full_name":"Maccone, Lorenzo"},{"last_name":"Macchiavello","first_name":"Chiara","full_name":"Macchiavello, Chiara"},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"}],"title":"Experimental entropic uncertainty relations in dimensions three to five","year":"2026","intvolume":" 113","publication_status":"published","date_updated":"2026-03-25T07:59:36Z","language":[{"iso":"eng"}],"article_number":"032420","doi":"10.1103/f6c4-jtlc"},{"language":[{"iso":"eng"}],"_id":"65357","publisher":"SPIE","editor":[{"full_name":"Razeghi, Manijeh","first_name":"Manijeh","last_name":"Razeghi"},{"last_name":"Khodaparast","first_name":"Giti A.","full_name":"Khodaparast, Giti A."},{"last_name":"Vitiello","first_name":"Miriam S.","full_name":"Vitiello, Miriam S."}],"user_id":"30525","doi":"10.1117/12.3095416","author":[{"full_name":"Kim, Minjun","last_name":"Kim","first_name":"Minjun"},{"full_name":"Devaraj, Vasanthan","last_name":"Devaraj","first_name":"Vasanthan"},{"first_name":"Hyeon-Seok","last_name":"Seo","full_name":"Seo, Hyeon-Seok"},{"full_name":"Eom, Seongjae","first_name":"Seongjae","last_name":"Eom"},{"full_name":"Lee, Jeong-Su","first_name":"Jeong-Su","last_name":"Lee"},{"last_name":"Lee","first_name":"Donghan","full_name":"Lee, Donghan"},{"id":"30525","full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas"},{"first_name":"Jong-Min","last_name":"Lee","full_name":"Lee, Jong-Min"},{"last_name":"Jeon","first_name":"Min Yong","full_name":"Jeon, Min Yong"}],"year":"2026","status":"public","title":"Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting","publication_status":"published","date_updated":"2026-04-07T04:30:07Z","date_created":"2026-04-07T04:29:28Z","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"type":"conference","citation":{"ieee":"M. Kim et al., “Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting,” in Quantum Sensing and Nano Electronics and Photonics XXII, 2026, doi: 10.1117/12.3095416.","mla":"Kim, Minjun, et al. “Fabrication of Uniform, High-Field-Enhanced Plasmonic Satellite Clusters Using Multidewetting.” Quantum Sensing and Nano Electronics and Photonics XXII, edited by Manijeh Razeghi et al., SPIE, 2026, doi:10.1117/12.3095416.","apa":"Kim, M., Devaraj, V., Seo, H.-S., Eom, S., Lee, J.-S., Lee, D., Zentgraf, T., Lee, J.-M., & Jeon, M. Y. (2026). Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting. In M. Razeghi, G. A. Khodaparast, & M. S. Vitiello (Eds.), Quantum Sensing and Nano Electronics and Photonics XXII. SPIE. https://doi.org/10.1117/12.3095416","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={10.1117/12.3095416}, 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} }","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 Quantum Sensing and Nano Electronics and Photonics XXII, edited by Manijeh Razeghi, Giti A. Khodaparast, and Miriam S. Vitiello. SPIE, 2026. https://doi.org/10.1117/12.3095416.","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.","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. Quantum Sensing and Nano Electronics and Photonics XXII. SPIE; 2026. doi:10.1117/12.3095416"},"publication":"Quantum Sensing and Nano Electronics and Photonics XXII"},{"date_created":"2026-04-20T04:52:59Z","keyword":["metasurface","beamsplitter","interferometer","quantum network","single photons","nanophotonics"],"type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"publication":"ACS Photonics","abstract":[{"lang":"eng","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. "}],"main_file_link":[{"url":"https://pubs.acs.org/doi/10.1021/acsphotonics.6c00096"}],"article_number":"acsphotonics.6c00096","language":[{"iso":"eng"}],"doi":"10.1021/acsphotonics.6c00096","year":"2026","title":"Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light","author":[{"first_name":"Rebecca","last_name":"Aschwanden","full_name":"Aschwanden, Rebecca"},{"full_name":"Claro-Rodríguez, Nicolás","first_name":"Nicolás","last_name":"Claro-Rodríguez"},{"first_name":"Ruizhe","last_name":"Zhao","full_name":"Zhao, Ruizhe"},{"full_name":"Kallert, Patricia Anna Maria","last_name":"Kallert","orcid":"0009-0007-5230-0223","first_name":"Patricia Anna Maria","id":"72332"},{"full_name":"Krieger, Tobias","last_name":"Krieger","first_name":"Tobias"},{"full_name":"Buchinger, Quirin","first_name":"Quirin","last_name":"Buchinger"},{"last_name":"Covre da Silva","first_name":"Saimon F.","full_name":"Covre da Silva, Saimon F."},{"full_name":"Stroj, Sandra","first_name":"Sandra","last_name":"Stroj"},{"full_name":"Rota, Michele","first_name":"Michele","last_name":"Rota"},{"full_name":"Höfling, Sven","last_name":"Höfling","first_name":"Sven"},{"first_name":"Tobias","last_name":"Huber-Loyola","full_name":"Huber-Loyola, Tobias"},{"full_name":"Rastelli, Armando","first_name":"Armando","last_name":"Rastelli"},{"first_name":"Rinaldo","last_name":"Trotta","full_name":"Trotta, Rinaldo"},{"full_name":"Huang, Lingling","last_name":"Huang","first_name":"Lingling"},{"id":"49683","last_name":"Bartley","first_name":"Tim","full_name":"Bartley, Tim"},{"id":"85353","full_name":"Jöns, Klaus","last_name":"Jöns","first_name":"Klaus"},{"full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas","id":"30525"}],"publication_identifier":{"issn":["2330-4022","2330-4022"]},"date_updated":"2026-04-20T05:01:00Z","publication_status":"published","article_type":"original","external_id":{"arxiv":["2603.25090"]},"citation":{"mla":"Aschwanden, Rebecca, et al. “Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light.” ACS Photonics, acsphotonics.6c00096, American Chemical Society (ACS), 2026, doi:10.1021/acsphotonics.6c00096.","ama":"Aschwanden R, Claro-Rodríguez N, Zhao R, et al. Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light. ACS Photonics. Published online 2026. doi:10.1021/acsphotonics.6c00096","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={10.1021/acsphotonics.6c00096}, 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} }","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., & Zentgraf, T. (2026). Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light. ACS Photonics, Article acsphotonics.6c00096. https://doi.org/10.1021/acsphotonics.6c00096","ieee":"R. Aschwanden et al., “Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light,” ACS Photonics, Art. no. acsphotonics.6c00096, 2026, doi: 10.1021/acsphotonics.6c00096.","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.” ACS Photonics, 2026. https://doi.org/10.1021/acsphotonics.6c00096."},"quality_controlled":"1","project":[{"_id":"54","name":"TRR 142 - Project Area A"},{"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"}],"_id":"65460","publisher":"American Chemical Society (ACS)","user_id":"30525","status":"public"},{"abstract":[{"lang":"eng","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."}],"publication":"ACS Photonics","type":"journal_article","keyword":["metasurface","waveguides","Dirac point","polarization","negative coupling"],"department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"date_created":"2026-04-02T07:25:30Z","publication_status":"published","date_updated":"2026-04-20T05:09:57Z","intvolume":" 13","year":"2026","title":"Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling","author":[{"first_name":"Helene","last_name":"Wetter","full_name":"Wetter, Helene"},{"full_name":"Wingenbach, Jan","first_name":"Jan","last_name":"Wingenbach","id":"69187"},{"first_name":"Falk","last_name":"Rehberg","full_name":"Rehberg, Falk"},{"full_name":"Gao, Wenlong","first_name":"Wenlong","last_name":"Gao"},{"id":"27271","first_name":"Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan"},{"full_name":"Zentgraf, Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas","id":"30525"}],"publication_identifier":{"issn":["2330-4022","2330-4022"]},"doi":"10.1021/acsphotonics.5c02865","main_file_link":[{"url":"https://pubs.acs.org/doi/10.1021/acsphotonics.5c02865"}],"language":[{"iso":"eng"}],"quality_controlled":"1","citation":{"mla":"Wetter, Helene, et al. “Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling.” ACS Photonics, vol. 13, American Chemical Society (ACS), 2026, pp. 2128–33, doi:10.1021/acsphotonics.5c02865.","ama":"Wetter H, Wingenbach J, Rehberg F, Gao W, Schumacher S, Zentgraf T. Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. ACS Photonics. 2026;13:2128-2133. doi:10.1021/acsphotonics.5c02865","bibtex":"@article{Wetter_Wingenbach_Rehberg_Gao_Schumacher_Zentgraf_2026, title={Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling}, volume={13}, DOI={10.1021/acsphotonics.5c02865}, 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} }","apa":"Wetter, H., Wingenbach, J., Rehberg, F., Gao, W., Schumacher, S., & Zentgraf, T. (2026). Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling. ACS Photonics, 13, 2128–2133. https://doi.org/10.1021/acsphotonics.5c02865","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,” ACS Photonics, vol. 13, pp. 2128–2133, 2026, doi: 10.1021/acsphotonics.5c02865.","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.” ACS Photonics 13 (2026): 2128–33. https://doi.org/10.1021/acsphotonics.5c02865."},"external_id":{"arxiv":["2512.14452"]},"status":"public","user_id":"30525","volume":13,"page":"2128-2133","_id":"65316","publisher":"American Chemical Society (ACS)"},{"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://pubs.rsc.org/en/content/articlelanding/2026/nr/d5nr03414k"}],"doi":"10.1039/d5nr03414k","author":[{"first_name":"Minjun","last_name":"Kim","full_name":"Kim, Minjun"},{"full_name":"Heo, Damun","last_name":"Heo","first_name":"Damun"},{"full_name":"Cho, Sung Yoon","first_name":"Sung Yoon","last_name":"Cho"},{"full_name":"Lee, Ye-Won","first_name":"Ye-Won","last_name":"Lee"},{"last_name":"Gu","first_name":"Sun-Hwa","full_name":"Gu, Sun-Hwa"},{"full_name":"Adhikari, Samir","last_name":"Adhikari","first_name":"Samir"},{"full_name":"Lee, Donghan","last_name":"Lee","first_name":"Donghan"},{"first_name":"Seok Soon","last_name":"Jeong","full_name":"Jeong, Seok Soon"},{"first_name":"Hyuck Soo","last_name":"Kim","full_name":"Kim, Hyuck Soo"},{"first_name":"Vasanthan","last_name":"Devaraj","full_name":"Devaraj, Vasanthan"},{"orcid":"0000-0002-8662-1101","last_name":"Zentgraf","first_name":"Thomas","full_name":"Zentgraf, Thomas","id":"30525"},{"first_name":"Min Yong","last_name":"Jeon","full_name":"Jeon, Min Yong"},{"first_name":"Jong-Min","last_name":"Lee","full_name":"Lee, Jong-Min"}],"publication_identifier":{"issn":["2040-3364","2040-3372"]},"title":"A functionalization-free plasmonic hole-sphere nanogap SERS platform for reliable on-site analysis and oxide-state classification","year":"2026","article_type":"original","intvolume":" 18","publication_status":"published","date_updated":"2026-05-20T06:55:49Z","date_created":"2026-05-20T06:53:30Z","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"type":"journal_article","issue":"8","publication":"Nanoscale","abstract":[{"text":"A functionalization-free plasmonic nanogap platform enables reliable on-site SERS based oxidation-state differentiation of arsenic through uniform metal-vacuum-metal cavities with high electromagnetic enhancement and minimal background interference.","lang":"eng"}],"_id":"65655","publisher":"Royal Society of Chemistry (RSC)","page":"4292-4299","volume":18,"user_id":"30525","status":"public","citation":{"chicago":"Kim, Minjun, Damun Heo, Sung Yoon Cho, Ye-Won Lee, Sun-Hwa Gu, Samir Adhikari, Donghan Lee, et al. “A Functionalization-Free Plasmonic Hole-Sphere Nanogap SERS Platform for Reliable on-Site Analysis and Oxide-State Classification.” Nanoscale 18, no. 8 (2026): 4292–99. https://doi.org/10.1039/d5nr03414k.","short":"M. Kim, D. Heo, S.Y. Cho, Y.-W. Lee, S.-H. Gu, S. Adhikari, D. Lee, S.S. Jeong, H.S. Kim, V. Devaraj, T. Zentgraf, M.Y. Jeon, J.-M. Lee, Nanoscale 18 (2026) 4292–4299.","ieee":"M. Kim et al., “A functionalization-free plasmonic hole-sphere nanogap SERS platform for reliable on-site analysis and oxide-state classification,” Nanoscale, vol. 18, no. 8, pp. 4292–4299, 2026, doi: 10.1039/d5nr03414k.","apa":"Kim, M., Heo, D., Cho, S. Y., Lee, Y.-W., Gu, S.-H., Adhikari, S., Lee, D., Jeong, S. S., Kim, H. S., Devaraj, V., Zentgraf, T., Jeon, M. Y., & Lee, J.-M. (2026). A functionalization-free plasmonic hole-sphere nanogap SERS platform for reliable on-site analysis and oxide-state classification. Nanoscale, 18(8), 4292–4299. https://doi.org/10.1039/d5nr03414k","bibtex":"@article{Kim_Heo_Cho_Lee_Gu_Adhikari_Lee_Jeong_Kim_Devaraj_et al._2026, title={A functionalization-free plasmonic hole-sphere nanogap SERS platform for reliable on-site analysis and oxide-state classification}, volume={18}, DOI={10.1039/d5nr03414k}, number={8}, journal={Nanoscale}, publisher={Royal Society of Chemistry (RSC)}, author={Kim, Minjun and Heo, Damun and Cho, Sung Yoon and Lee, Ye-Won and Gu, Sun-Hwa and Adhikari, Samir and Lee, Donghan and Jeong, Seok Soon and Kim, Hyuck Soo and Devaraj, Vasanthan and et al.}, year={2026}, pages={4292–4299} }","ama":"Kim M, Heo D, Cho SY, et al. A functionalization-free plasmonic hole-sphere nanogap SERS platform for reliable on-site analysis and oxide-state classification. Nanoscale. 2026;18(8):4292-4299. doi:10.1039/d5nr03414k","mla":"Kim, Minjun, et al. “A Functionalization-Free Plasmonic Hole-Sphere Nanogap SERS Platform for Reliable on-Site Analysis and Oxide-State Classification.” Nanoscale, vol. 18, no. 8, Royal Society of Chemistry (RSC), 2026, pp. 4292–99, doi:10.1039/d5nr03414k."},"quality_controlled":"1"},{"department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"type":"journal_article","date_created":"2026-06-12T08:14:35Z","related_material":{"link":[{"url":"https://doi.org/10.5281/zenodo.18969354","relation":"research_data"}]},"abstract":[{"lang":"eng","text":"Simulating vibronic spectra is a central task in physical chemistry, offering insight into important properties of molecules. Recently, it has been experimentally demonstrated that photonic platforms based on Gaussian boson sampling (GBS) are capable of performing these simulations. However, whether an actual GBS approach is required depends on the molecule under investigation. To develop a better understanding on the requirements for simulating vibronic spectra, we explore connections between theoretical approximations in physical chemistry and their photonic counterparts. Mapping these approximations into photonics, we show that for certain molecules the GBS approach is unnecessary. We place special emphasis on the linear coupling approximation, which in photonics corresponds to sampling from multiple coherent states. By implementing this approach in experiments, we demonstrate improved similarities over previously reported GBS results for formic acid and identify the particular attributes that a molecule must exhibit for this, and other approximations, to be valid. These results highlight the importance in forming deeper connections between traditional methods and photonic approaches."}],"issue":"1","publication":"npj Quantum Information","doi":"10.1038/s41534-026-01250-x","language":[{"iso":"eng"}],"main_file_link":[{"url":"https://www.nature.com/articles/s41534-026-01250-x.pdf","open_access":"1"}],"article_number":"89","intvolume":" 12","article_type":"original","date_updated":"2026-06-12T08:28:02Z","publication_status":"published","author":[{"id":"73665","last_name":"Eickmann","first_name":"Jan-Lucas","orcid":"0009-0008-6524-7684","full_name":"Eickmann, Jan-Lucas"},{"id":"36389","first_name":"Kai-Hong","orcid":"0000-0003-1008-4976","last_name":"Luo","full_name":"Luo, Kai-Hong"},{"first_name":"Mikhail","last_name":"Roiz","full_name":"Roiz, Mikhail","id":"114114"},{"full_name":"Lammers, Jonas","last_name":"Lammers","first_name":"Jonas"},{"id":"98338","first_name":"Simone","last_name":"Atzeni","full_name":"Atzeni, Simone"},{"full_name":"Pandey, Cheeranjiv","last_name":"Pandey","first_name":"Cheeranjiv"},{"full_name":"Lütkewitte, Florian","last_name":"Lütkewitte","first_name":"Florian"},{"full_name":"Shirazi, Reza G.","last_name":"Shirazi","first_name":"Reza G."},{"id":"63579","last_name":"Schlue","first_name":"Fabian","full_name":"Schlue, Fabian"},{"full_name":"Brecht, Benjamin","first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","id":"27150"},{"last_name":"Rybkin","first_name":"Vladimir V.","full_name":"Rybkin, Vladimir V."},{"id":"42777","last_name":"Stefszky","first_name":"Michael","full_name":"Stefszky, Michael"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"}],"publication_identifier":{"issn":["2056-6387"]},"year":"2026","title":"Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra","oa":"1","project":[{"_id":"191","name":"PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform"}],"citation":{"ieee":"J.-L. Eickmann et al., “Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra,” npj Quantum Information, vol. 12, no. 1, Art. no. 89, 2026, doi: 10.1038/s41534-026-01250-x.","apa":"Eickmann, J.-L., Luo, K.-H., Roiz, M., Lammers, J., Atzeni, S., Pandey, C., Lütkewitte, F., Shirazi, R. G., Schlue, F., Brecht, B., Rybkin, V. V., Stefszky, M., & Silberhorn, C. (2026). Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra. Npj Quantum Information, 12(1), Article 89. https://doi.org/10.1038/s41534-026-01250-x","short":"J.-L. Eickmann, K.-H. Luo, M. Roiz, J. Lammers, S. Atzeni, C. Pandey, F. Lütkewitte, R.G. Shirazi, F. Schlue, B. Brecht, V.V. Rybkin, M. Stefszky, C. Silberhorn, Npj Quantum Information 12 (2026).","chicago":"Eickmann, Jan-Lucas, Kai-Hong Luo, Mikhail Roiz, Jonas Lammers, Simone Atzeni, Cheeranjiv Pandey, Florian Lütkewitte, et al. “Bridging Chemistry and Gaussian Boson Sampling: A Photonic Hierarchy of Approximations for Molecular Vibronic Spectra.” Npj Quantum Information 12, no. 1 (2026). https://doi.org/10.1038/s41534-026-01250-x.","mla":"Eickmann, Jan-Lucas, et al. “Bridging Chemistry and Gaussian Boson Sampling: A Photonic Hierarchy of Approximations for Molecular Vibronic Spectra.” Npj Quantum Information, vol. 12, no. 1, 89, Springer Science and Business Media LLC, 2026, doi:10.1038/s41534-026-01250-x.","bibtex":"@article{Eickmann_Luo_Roiz_Lammers_Atzeni_Pandey_Lütkewitte_Shirazi_Schlue_Brecht_et al._2026, title={Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra}, volume={12}, DOI={10.1038/s41534-026-01250-x}, number={189}, journal={npj Quantum Information}, publisher={Springer Science and Business Media LLC}, author={Eickmann, Jan-Lucas and Luo, Kai-Hong and Roiz, Mikhail and Lammers, Jonas and Atzeni, Simone and Pandey, Cheeranjiv and Lütkewitte, Florian and Shirazi, Reza G. and Schlue, Fabian and Brecht, Benjamin and et al.}, year={2026} }","ama":"Eickmann J-L, Luo K-H, Roiz M, et al. Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra. npj Quantum Information. 2026;12(1). doi:10.1038/s41534-026-01250-x"},"volume":12,"user_id":"73665","_id":"65847","publisher":"Springer Science and Business Media LLC","status":"public"},{"citation":{"ama":"Jin X, Zentgraf T. OAM-multiplexed holography via cascaded metasurfaces without post sampling and position multiplexing. In: MacDonald KF, Zayats AV, Staude I, eds. Metamaterials XV. Vol 14075. SPIE; 2026. doi:10.1117/12.3096579","bibtex":"@inproceedings{Jin_Zentgraf_2026, title={OAM-multiplexed holography via cascaded metasurfaces without post sampling and position multiplexing}, volume={14075}, DOI={10.1117/12.3096579}, number={1407507}, booktitle={Metamaterials XV}, publisher={SPIE}, author={Jin, Xiao and Zentgraf, Thomas}, editor={MacDonald, Kevin F. and Zayats, Anatoly V. and Staude, Isabelle}, year={2026} }","mla":"Jin, Xiao, and Thomas Zentgraf. “OAM-Multiplexed Holography via Cascaded Metasurfaces without Post Sampling and Position Multiplexing.” Metamaterials XV, edited by Kevin F. MacDonald et al., vol. 14075, 1407507, SPIE, 2026, doi:10.1117/12.3096579.","short":"X. Jin, T. Zentgraf, in: K.F. MacDonald, A.V. Zayats, I. Staude (Eds.), Metamaterials XV, SPIE, 2026.","chicago":"Jin, Xiao, and Thomas Zentgraf. “OAM-Multiplexed Holography via Cascaded Metasurfaces without Post Sampling and Position Multiplexing.” In Metamaterials XV, edited by Kevin F. MacDonald, Anatoly V. Zayats, and Isabelle Staude, Vol. 14075. SPIE, 2026. https://doi.org/10.1117/12.3096579.","apa":"Jin, X., & Zentgraf, T. (2026). OAM-multiplexed holography via cascaded metasurfaces without post sampling and position multiplexing. In K. F. MacDonald, A. V. Zayats, & I. Staude (Eds.), Metamaterials XV (No. 1407507; Vol. 14075). SPIE. https://doi.org/10.1117/12.3096579","ieee":"X. Jin and T. Zentgraf, “OAM-multiplexed holography via cascaded metasurfaces without post sampling and position multiplexing,” in Metamaterials XV, Strasbourg, France, 2026, vol. 14075, doi: 10.1117/12.3096579."},"status":"public","conference":{"name":"SPIE Photonics Europe 2026","location":"Strasbourg, France"},"user_id":"30525","editor":[{"full_name":"MacDonald, Kevin F.","last_name":"MacDonald","first_name":"Kevin F."},{"full_name":"Zayats, Anatoly V.","first_name":"Anatoly V.","last_name":"Zayats"},{"full_name":"Staude, Isabelle","last_name":"Staude","first_name":"Isabelle"}],"volume":14075,"_id":"65906","publisher":"SPIE","publication":"Metamaterials XV","type":"conference","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"date_created":"2026-06-16T07:37:13Z","date_updated":"2026-06-16T07:40:15Z","publication_status":"published","intvolume":" 14075","title":"OAM-multiplexed holography via cascaded metasurfaces without post sampling and position multiplexing","year":"2026","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"}],"doi":"10.1117/12.3096579","main_file_link":[{"url":"https://www.spiedigitallibrary.org/conference-proceedings-of-spie/14075/3096579/OAM-multiplexed-holography-via-cascaded-metasurfaces-without-post-sampling-and/10.1117/12.3096579.full"}],"article_number":"1407507","language":[{"iso":"eng"}]},{"publication":"Laser & Photonics Reviews","abstract":[{"lang":"eng","text":"Scalable plasmonic technologies face a critical trade‐off: few‐body architectures offer high enhancement but are sensitive to fabrication flaws, while scalable methods like solid‐state dewetting yield large, low‐enhancement gaps. We introduce a paradigm shift using a many‐body plasmonic architecture inspired by statistical mechanics. By moving toward the continuum limit, local geometric variations are statistically averaged out, effectively decoupling optical performance from microscopic disorder. We implement this concept via a lithography‐ and etching‐free, multi‐step dewetting strategy, creating wafer‐scale nanoclusters. This process strategically forms a robust many‐body system by introducing numerous small satellite nanoparticles between larger particles. Crucially, this design achieves a high collective enhancement that surpasses even optimized few‐body systems, despite having larger individual gaps. Under optimized conditions, these substrates exhibit a surface‐enhanced Raman scattering enhancement factor approaching 4 × 10^8 with unprecedented reproducibility (RSD of ∼10%). This scalable, low‐cost concept establishes a practical route toward reproducible wafer‐scale nanophotonic platforms for sensing, spectroscopy, and quantum technologies."}],"date_created":"2026-07-22T05:49:50Z","type":"journal_article","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"year":"2026","title":"Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement","author":[{"full_name":"Kim, Minjun","first_name":"Minjun","last_name":"Kim"},{"id":"103814","last_name":"Devaraj","first_name":"Vasanthan","full_name":"Devaraj, Vasanthan"},{"full_name":"Seo, Hyeon‐Seok","last_name":"Seo","first_name":"Hyeon‐Seok"},{"full_name":"Eom, Seong‐Jae","last_name":"Eom","first_name":"Seong‐Jae"},{"last_name":"Lee","first_name":"Jeong‐Su","full_name":"Lee, Jeong‐Su"},{"first_name":"Donghan","last_name":"Lee","full_name":"Lee, Donghan"},{"first_name":"Min Yong","last_name":"Jeon","full_name":"Jeon, Min Yong"},{"full_name":"Zentgraf, Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","first_name":"Thomas","id":"30525"},{"full_name":"Lee, Jong‐Min","first_name":"Jong‐Min","last_name":"Lee"}],"publication_identifier":{"issn":["1863-8880","1863-8899"]},"publication_status":"published","date_updated":"2026-07-22T05:52:38Z","article_type":"original","article_number":"e71610","main_file_link":[{"url":"https://onlinelibrary.wiley.com/doi/10.1002/lpor.71610","open_access":"1"}],"language":[{"iso":"eng"}],"doi":"10.1002/lpor.71610","citation":{"chicago":"Kim, Minjun, Vasanthan Devaraj, Hyeon‐Seok Seo, Seong‐Jae Eom, Jeong‐Su Lee, Donghan Lee, Min Yong Jeon, Thomas Zentgraf, and Jong‐Min Lee. “Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement.” Laser &amp; Photonics Reviews, 2026. https://doi.org/10.1002/lpor.71610.","short":"M. Kim, V. Devaraj, H. Seo, S. Eom, J. Lee, D. Lee, M.Y. Jeon, T. Zentgraf, J. Lee, Laser &amp; Photonics Reviews (2026).","apa":"Kim, M., Devaraj, V., Seo, H., Eom, S., Lee, J., Lee, D., Jeon, M. Y., Zentgraf, T., & Lee, J. (2026). Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement. Laser &amp; Photonics Reviews, Article e71610. https://doi.org/10.1002/lpor.71610","ieee":"M. Kim et al., “Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement,” Laser &amp; Photonics Reviews, Art. no. e71610, 2026, doi: 10.1002/lpor.71610.","ama":"Kim M, Devaraj V, Seo H, et al. Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement. Laser &amp; Photonics Reviews. Published online 2026. doi:10.1002/lpor.71610","bibtex":"@article{Kim_Devaraj_Seo_Eom_Lee_Lee_Jeon_Zentgraf_Lee_2026, title={Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement}, DOI={10.1002/lpor.71610}, number={e71610}, journal={Laser &amp; Photonics Reviews}, publisher={Wiley}, author={Kim, Minjun and Devaraj, Vasanthan and Seo, Hyeon‐Seok and Eom, Seong‐Jae and Lee, Jeong‐Su and Lee, Donghan and Jeon, Min Yong and Zentgraf, Thomas and Lee, Jong‐Min}, year={2026} }","mla":"Kim, Minjun, et al. “Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement.” Laser &amp; Photonics Reviews, e71610, Wiley, 2026, doi:10.1002/lpor.71610."},"quality_controlled":"1","oa":"1","status":"public","publisher":"Wiley","_id":"66555","user_id":"30525"},{"abstract":[{"lang":"eng","text":"Abstract\r\n \r\n We study theoretically how high-gain effects affect the measurement outcome of visible signal spectra in undetected photon measurement schemes. We consider two interferometric configurations: firstly, the SU(1,1) interferometer where the idler incurs loss and additional dispersion in between two identical, lossless, squeezers; secondly, the induced coherence interferometer where the idler incurs loss and additional dispersion in between two identical, lossless, squeezers and where the second squeezer is seeded by the idler and a vacuum ancilla mode. Furthermore, we consider a distributed loss configuration where the idler incurs loss as it propagates in the nonlinear medium. Motivated by experimental evidence and due to the fact that broadband sources are ideal for these measurement schemes, we use the dispersive data of a third-order dispersion engineered integrated waveguide parametric down conversion (PDC) source presented in Roeder\r\n et al\r\n (2024 New J. Phys.\r\n 26\r\n 123025) to model the PDC spectra in the three configurations. For each configuration we consider the case of idler-only (i) absorption, (ii) additional dispersion, and (iii) the combined effects. We obtain results which outline the strength and weaknesses of the different configurations at different operation points.\r\n "}],"issue":"7","publication":"New Journal of Physics","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2026-08-18T10:21:08Z","intvolume":" 28","date_updated":"2026-08-18T10:21:29Z","publication_status":"published","author":[{"full_name":"Houde, Martin","first_name":"Martin","last_name":"Houde"},{"first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz","id":"88149"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"},{"id":"27150","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin"},{"full_name":"Quesada, Nicolás","last_name":"Quesada","first_name":"Nicolás"}],"publication_identifier":{"issn":["1367-2630"]},"title":"High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons","year":"2026","doi":"10.1088/1367-2630/ae8692","language":[{"iso":"eng"}],"article_number":"074509","citation":{"chicago":"Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and Nicolás Quesada. “High-Gain Effects in Broadband Continuous-Wave Parametric down Conversion Sources and Measurements with Undetected Photons.” New Journal of Physics 28, no. 7 (2026). https://doi.org/10.1088/1367-2630/ae8692.","short":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, New Journal of Physics 28 (2026).","ieee":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons,” New Journal of Physics, vol. 28, no. 7, Art. no. 074509, 2026, doi: 10.1088/1367-2630/ae8692.","apa":"Houde, M., Roeder, F., Silberhorn, C., Brecht, B., & Quesada, N. (2026). High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons. New Journal of Physics, 28(7), Article 074509. https://doi.org/10.1088/1367-2630/ae8692","bibtex":"@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons}, volume={28}, DOI={10.1088/1367-2630/ae8692}, number={7074509}, journal={New Journal of Physics}, publisher={IOP Publishing}, author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin and Quesada, Nicolás}, year={2026} }","ama":"Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons. New Journal of Physics. 2026;28(7). doi:10.1088/1367-2630/ae8692","mla":"Houde, Martin, et al. “High-Gain Effects in Broadband Continuous-Wave Parametric down Conversion Sources and Measurements with Undetected Photons.” New Journal of Physics, vol. 28, no. 7, 074509, IOP Publishing, 2026, doi:10.1088/1367-2630/ae8692."},"status":"public","volume":28,"user_id":"27150","publisher":"IOP Publishing","_id":"66741"},{"_id":"66740","publisher":"IOP Publishing","volume":8,"user_id":"27150","status":"public","citation":{"mla":"Houde, Martin, et al. “Quantum Fisher Information Analysis for Absorption Measurements with Undetected Photons.” Journal of Physics: Photonics, vol. 8, no. 3, 035013, IOP Publishing, 2026, doi:10.1088/2515-7647/ae82a2.","ama":"Houde M, Roeder F, Silberhorn C, Brecht B, Quesada N. Quantum fisher information analysis for absorption measurements with undetected photons. Journal of Physics: Photonics. 2026;8(3). doi:10.1088/2515-7647/ae82a2","bibtex":"@article{Houde_Roeder_Silberhorn_Brecht_Quesada_2026, title={Quantum fisher information analysis for absorption measurements with undetected photons}, volume={8}, DOI={10.1088/2515-7647/ae82a2}, number={3035013}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Houde, Martin and Roeder, Franz and Silberhorn, Christine and Brecht, Benjamin and Quesada, Nicolás}, year={2026} }","apa":"Houde, M., Roeder, F., Silberhorn, C., Brecht, B., & Quesada, N. (2026). Quantum fisher information analysis for absorption measurements with undetected photons. Journal of Physics: Photonics, 8(3), Article 035013. https://doi.org/10.1088/2515-7647/ae82a2","ieee":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, and N. Quesada, “Quantum fisher information analysis for absorption measurements with undetected photons,” Journal of Physics: Photonics, vol. 8, no. 3, Art. no. 035013, 2026, doi: 10.1088/2515-7647/ae82a2.","short":"M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, Journal of Physics: Photonics 8 (2026).","chicago":"Houde, Martin, Franz Roeder, Christine Silberhorn, Benjamin Brecht, and Nicolás Quesada. “Quantum Fisher Information Analysis for Absorption Measurements with Undetected Photons.” Journal of Physics: Photonics 8, no. 3 (2026). https://doi.org/10.1088/2515-7647/ae82a2."},"language":[{"iso":"eng"}],"article_number":"035013","doi":"10.1088/2515-7647/ae82a2","publication_identifier":{"issn":["2515-7647"]},"author":[{"full_name":"Houde, Martin","first_name":"Martin","last_name":"Houde"},{"id":"88149","full_name":"Roeder, Franz","first_name":"Franz","last_name":"Roeder"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht","full_name":"Brecht, Benjamin","id":"27150"},{"full_name":"Quesada, Nicolás","last_name":"Quesada","first_name":"Nicolás"}],"year":"2026","title":"Quantum fisher information analysis for absorption measurements with undetected photons","intvolume":" 8","date_updated":"2026-08-18T10:20:54Z","publication_status":"published","date_created":"2026-08-18T10:20:21Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","issue":"3","publication":"Journal of Physics: Photonics","abstract":[{"text":"Abstract\r\n \r\n We theoretically compare the quantum Fisher information (QFI) for three configurations of absorption spectroscopy with undetected idler photons: an SU(1,1) interferometer with inter-source idler loss, an induced-coherence (IC) setup in which the idler partially seeds a second squeezer together with a vacuum ancilla, and a distributed-loss (DL) scheme with in-medium attenuation. We calculate the QFI as a function of parametric gain for both full and signal-only detection access. For losses below 99% and low to moderate gain, the SU(1,1) configuration provides the largest QFI. At high gain and intermediate loss, the IC scheme performs best, while under extreme attenuation (transmission\r\n \r\n \r\n \r\n \r\n \r\n \r\n <\r\n \r\n \r\n \r\n 1%) the DL model becomes optimal. These results delineate the measurement regimes in which each architecture is optimal in terms of information theory.\r\n ","lang":"eng"}]},{"type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"date_created":"2026-08-31T12:02:48Z","abstract":[{"lang":"eng","text":"Integrated photon-pair sources, providing scalability solutions, are crucial for large-scale realizations of quantum photonic technologies. Their traditional fabrication techniques, such as etching, are often complex, require long development cycles, and are resource inefficient in case of fabrication imperfections or failures. The two-photon polymerization (2PP) technique can offer a rapid, efficient, and reproducible alternative for the fabrication of integrated photonic devices. Here, we demonstrate an integrated photon-pair source based on a 2PP-defined strip-loaded waveguide on a periodically poled thin-film lithium niobate (TFLN) platform. The device generates photon pairs through type-II spontaneous parametric down-conversion (SPDC), employing first-order quasi-phase matching (QPM) with TM-polarized excitation light. The device achieves an on-chip pair generation rate of 4.357 MHz and a coincidence-to-accidental ratio (CAR) of ∼404. To prove the flexibility and versatility of the fabrication technique, the waveguides were erased from the LN substrate and reprinted, reaching comparable performance. This work demonstrates the potential of 2PP as a rapid production technique for high-performance integrated photon-pair sources, offering a practical solution to the limitations of traditional fabrication techniques and showcasing both reproducibility of the fabrication and the reusability of the substrate."}],"publication":"Optics Express","issue":"16","doi":"10.1364/oe.596879","article_number":"29244","main_file_link":[{"open_access":"1","url":"https://opg.optica.org/oe/fulltext.cfm?uri=oe-34-16-29244"}],"language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2026-08-31T12:11:43Z","article_type":"original","intvolume":" 34","title":"High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide","year":"2026","publication_identifier":{"issn":["1094-4087"]},"author":[{"full_name":"Sewidan, Muhamed A.","last_name":"Sewidan","first_name":"Muhamed A."},{"first_name":"Alexandra","last_name":"Rittmeier","full_name":"Rittmeier, Alexandra"},{"id":"61375","full_name":"Bollmers, Laura","first_name":"Laura","last_name":"Bollmers"},{"id":"63231","orcid":"https://orcid.org/0000-0002-1568-2580","last_name":"Babel","first_name":"Silia","full_name":"Babel, Silia"},{"full_name":"Chatzizyrli, Elisavet","last_name":"Chatzizyrli","first_name":"Elisavet"},{"first_name":"Juan S. S.","last_name":"Duran Gomez","full_name":"Duran Gomez, Juan S. S."},{"id":"40300","first_name":"Laura","last_name":"Padberg","full_name":"Padberg, Laura"},{"id":"13244","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof","last_name":"Eigner","full_name":"Eigner, Christof"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"},{"full_name":"Bremner, Douglas","last_name":"Bremner","first_name":"Douglas"},{"full_name":"Wienke, Andreas","last_name":"Wienke","first_name":"Andreas"},{"full_name":"Kracht, Dietmar","last_name":"Kracht","first_name":"Dietmar"},{"last_name":"Hinkelmann","first_name":"Moritz","full_name":"Hinkelmann, Moritz"},{"last_name":"Kues","first_name":"Michael","full_name":"Kues, Michael"}],"oa":"1","citation":{"chicago":"Sewidan, Muhamed A., Alexandra Rittmeier, Laura Bollmers, Silia Babel, Elisavet Chatzizyrli, Juan S. S. Duran Gomez, Laura Padberg, et al. “High-Performance Photon-Pair Source Using a Two-Photon-Polymerized Strip-Loaded Lithium Niobate Waveguide.” Optics Express 34, no. 16 (2026). https://doi.org/10.1364/oe.596879.","short":"M.A. Sewidan, A. Rittmeier, L. Bollmers, S. Babel, E. Chatzizyrli, J.S.S. Duran Gomez, L. Padberg, C. Eigner, C. Silberhorn, D. Bremner, A. Wienke, D. Kracht, M. Hinkelmann, M. Kues, Optics Express 34 (2026).","apa":"Sewidan, M. A., Rittmeier, A., Bollmers, L., Babel, S., Chatzizyrli, E., Duran Gomez, J. S. S., Padberg, L., Eigner, C., Silberhorn, C., Bremner, D., Wienke, A., Kracht, D., Hinkelmann, M., & Kues, M. (2026). High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide. Optics Express, 34(16), Article 29244. https://doi.org/10.1364/oe.596879","ieee":"M. A. Sewidan et al., “High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide,” Optics Express, vol. 34, no. 16, Art. no. 29244, 2026, doi: 10.1364/oe.596879.","ama":"Sewidan MA, Rittmeier A, Bollmers L, et al. High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide. Optics Express. 2026;34(16). doi:10.1364/oe.596879","bibtex":"@article{Sewidan_Rittmeier_Bollmers_Babel_Chatzizyrli_Duran Gomez_Padberg_Eigner_Silberhorn_Bremner_et al._2026, title={High-performance photon-pair source using a two-photon-polymerized strip-loaded lithium niobate waveguide}, volume={34}, DOI={10.1364/oe.596879}, number={1629244}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Sewidan, Muhamed A. and Rittmeier, Alexandra and Bollmers, Laura and Babel, Silia and Chatzizyrli, Elisavet and Duran Gomez, Juan S. S. and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Bremner, Douglas and et al.}, year={2026} }","mla":"Sewidan, Muhamed A., et al. “High-Performance Photon-Pair Source Using a Two-Photon-Polymerized Strip-Loaded Lithium Niobate Waveguide.” Optics Express, vol. 34, no. 16, 29244, Optica Publishing Group, 2026, doi:10.1364/oe.596879."},"user_id":"63231","volume":34,"publisher":"Optica Publishing Group","_id":"66877","status":"public"},{"oa":"1","citation":{"mla":"Roeder, Franz, et al. “Lithium Niobate Tantalate Mixed Crystals: A Versatile Platform for Nonlinear Quantum Processes.” Optical Materials Express, vol. 16, no. 8, 2668, Optica Publishing Group, 2026, doi:10.1364/ome.592892.","ama":"Roeder F, Rüsing M, Hehemann T, et al. Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes. Optical Materials Express. 2026;16(8). doi:10.1364/ome.592892","bibtex":"@article{Roeder_Rüsing_Hehemann_Gnanavel_Eigner_Brecht_Imlau_Silberhorn_2026, title={Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes}, volume={16}, DOI={10.1364/ome.592892}, number={82668}, journal={Optical Materials Express}, publisher={Optica Publishing Group}, author={Roeder, Franz and Rüsing, Michael and Hehemann, Tobias and Gnanavel, Abira and Eigner, Christof and Brecht, Benjamin and Imlau, Mirco and Silberhorn, Christine}, year={2026} }","apa":"Roeder, F., Rüsing, M., Hehemann, T., Gnanavel, A., Eigner, C., Brecht, B., Imlau, M., & Silberhorn, C. (2026). Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes. Optical Materials Express, 16(8), Article 2668. https://doi.org/10.1364/ome.592892","ieee":"F. Roeder et al., “Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes,” Optical Materials Express, vol. 16, no. 8, Art. no. 2668, 2026, doi: 10.1364/ome.592892.","short":"F. Roeder, M. Rüsing, T. Hehemann, A. Gnanavel, C. Eigner, B. Brecht, M. Imlau, C. Silberhorn, Optical Materials Express 16 (2026).","chicago":"Roeder, Franz, Michael Rüsing, Tobias Hehemann, Abira Gnanavel, Christof Eigner, Benjamin Brecht, Mirco Imlau, and Christine Silberhorn. “Lithium Niobate Tantalate Mixed Crystals: A Versatile Platform for Nonlinear Quantum Processes.” Optical Materials Express 16, no. 8 (2026). https://doi.org/10.1364/ome.592892."},"quality_controlled":"1","publisher":"Optica Publishing Group","_id":"66939","funded_apc":"1","user_id":"22501","volume":16,"status":"public","date_created":"2026-09-02T11:53:45Z","type":"journal_article","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"publication":"Optical Materials Express","issue":"8","abstract":[{"text":"Many quantum optical applications in spectroscopy, communication and signal analysis rely on spectrally-engineered nonlinear optical interactions to target specific wavelengths or bandwidth. Here, in an established material platform like lithium niobate the achievable wavelength and bandwidth combinations are usually limited by the material’s dispersion and its birefringence. In this regard, mixed crystals of lithium niobate tantalate (LNT) promise a novel material platform, because they allow tuning the birefringence, which is central for type II phase matching devices. Crucially, LNT offers crystal compositions without any birefringence, which still retain their second-order optical nonlinearity. Despite recent progress in the growth and fabrication of LNT, so far no works have investigated the unique properties of LNT for use in electro-optics, nonlinear or quantum optics. In this study, we explore nonlinear optical devices based on LNT for broad- and narrowband nonlinear optical interactions based on recently measured Sellmeier coefficients. Most interestingly, we find that compositions without birefringence allow the design of broadband, degenerate type II phase matching sources spanning the whole near- to mid-infrared range by only changing the poling period and pump wavelength. Such devices are not easily realizable in pure lithium niobate or lithium tantalate. This could potentially allow for\tmore flexible light sources and nonlinear devices in quantum metrology, quantum spectroscopy and quantum communication.","lang":"eng"}],"article_number":"2668","main_file_link":[{"open_access":"1","url":"https://doi.org/10.1364/OME.592892"}],"language":[{"iso":"eng"}],"doi":"10.1364/ome.592892","year":"2026","title":"Lithium niobate tantalate mixed crystals: a versatile platform for nonlinear quantum processes","publication_identifier":{"issn":["2159-3930"]},"author":[{"id":"88149","first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz"},{"id":"22501","full_name":"Rüsing, Michael","first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing"},{"last_name":"Hehemann","first_name":"Tobias","full_name":"Hehemann, Tobias"},{"full_name":"Gnanavel, Abira","first_name":"Abira","last_name":"Gnanavel","id":"81424"},{"id":"13244","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof","last_name":"Eigner"},{"last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","full_name":"Brecht, Benjamin","id":"27150"},{"full_name":"Imlau, Mirco","last_name":"Imlau","first_name":"Mirco"},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"}],"publication_status":"published","date_updated":"2026-09-02T13:35:22Z","article_type":"original","intvolume":" 16"}]