--- _id: '63827' 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. article_number: '128' article_type: original author: - first_name: Dominik full_name: Metzner, Dominik last_name: Metzner - first_name: Jens full_name: Potthoff, Jens last_name: Potthoff - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: 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 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 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} }' 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. 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.' 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. short: D. Metzner, J. Potthoff, T. Zentgraf, J. Förstner, Photonics 13 (2026). date_created: 2026-02-02T07:18:03Z date_updated: 2026-02-02T21:38:34Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' - _id: '61' doi: 10.3390/photonics13020128 intvolume: ' 13' issue: '2' keyword: - tet_topic_opticalantenna - tet_topic_numerics - tet_topic_meta language: - iso: eng main_file_link: - open_access: '1' url: https://www.mdpi.com/2304-6732/13/2/128 oa: '1' publication: Photonics publication_identifier: issn: - 2304-6732 publication_status: published publisher: MDPI AG quality_controlled: '1' status: public title: Approximating Incoherent Monochromatic Light Sources in FDTD Simulations type: journal_article user_id: '158' volume: 13 year: '2026' ... --- _id: '64864' 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. article_number: '1842' article_type: original author: - first_name: Andrew full_name: Rogers, Andrew last_name: Rogers - first_name: Kristina full_name: Holsgrove, Kristina last_name: Holsgrove - first_name: Nils A. full_name: Schäfer, Nils A. last_name: Schäfer - first_name: Boris full_name: Koppitz, Boris last_name: Koppitz - first_name: Conor J. full_name: McCluskey, Conor J. last_name: McCluskey - first_name: Shivani full_name: Yedama, Shivani last_name: Yedama - first_name: Ronan full_name: Lynch, Ronan last_name: Lynch - first_name: Keelan full_name: Sloan, Keelan last_name: Sloan - first_name: Barry full_name: Porter, Barry last_name: Porter - first_name: Adam full_name: Sykes, Adam last_name: Sykes - first_name: Alex full_name: Catalan Daniels, Alex last_name: Catalan Daniels - first_name: Romualdo S. full_name: Silva, Romualdo S. last_name: Silva - first_name: Flavio Y. full_name: Bruno, Flavio Y. last_name: Bruno - first_name: Sam D. full_name: Seddon, Sam D. last_name: Seddon - first_name: Haidong full_name: Lu, Haidong last_name: Lu - first_name: Michael full_name: Rüsing, Michael id: '22501' last_name: Rüsing orcid: 0000-0003-4682-4577 - first_name: Christa full_name: Fink, Christa last_name: Fink - first_name: Philipp full_name: Fahler-Muenzer, Philipp last_name: Fahler-Muenzer - first_name: Sarah full_name: Fearn, Sarah last_name: Fearn - first_name: Sandrine E. M. full_name: Heutz, Sandrine E. M. last_name: Heutz - first_name: Marios full_name: Hadjimichael, Marios last_name: Hadjimichael - first_name: Quentin M. full_name: Ramasse, Quentin M. last_name: Ramasse - first_name: Marin full_name: Alexe, Marin last_name: Alexe - first_name: Amit full_name: Kumar, Amit last_name: Kumar - first_name: Raymond G. P. full_name: McQuaid, Raymond G. P. last_name: McQuaid - first_name: Alexei full_name: Gruverman, Alexei last_name: Gruverman - first_name: Simone full_name: Sanna, Simone last_name: Sanna - first_name: Lukas M. full_name: Eng, Lukas M. last_name: Eng - first_name: J. Marty full_name: Gregg, J. Marty last_name: Gregg citation: 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 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 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} }' 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. 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.' 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. 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). date_created: 2026-03-08T09:20:13Z date_updated: 2026-03-08T09:22:25Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1038/s41467-026-68553-7 intvolume: ' 17' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://www.nature.com/articles/s41467-026-68553-7 oa: '1' publication: Nature Communications publication_identifier: issn: - 2041-1723 publication_status: published publisher: Springer Science and Business Media LLC quality_controlled: '1' status: public title: Polar discontinuities, emergent conductivity, and critical twist-angle-dependent behaviour at wafer-bonded ferroelectric interfaces type: journal_article user_id: '22501' volume: 17 year: '2026' ... --- _id: '64873' abstract: - lang: eng text: Continuous flow catalysis utilizing gel-bound organocatalysts within a microfluidic reactor represents a compelling strategy in the realm of organic synthesis. In this study, a quinuclidine-based catalytic monomer (QMA) was synthesized to create polymer gel dots through the process of photopolymerization that serve as a support for the catalyst. The resulting gel-bound organocatalysts were assembled within a continuous microfluidic reactor to facilitate the Baylis–Hillman reaction between various aldehydes and acrylonitrile at a temperature of 50 °C. The conversion of the product was assessed using 1H NMR spectroscopy as an offline analytical method over a duration of 8 h. The findings indicated that highly reactive aldehydes achieved conversion rates exceeding 90%, in contrast to their less reactive counterparts. Furthermore, these results were juxtaposed with previously published data derived from alternative synthetic methodologies, revealing that the continuous microfluidic reactions employing integrated organocatalysts within polymer networks exhibited significantly higher conversions with reduced reaction times (8 h) at the same temperature (50 °C). Additionally, the influence of different geometries (round, triangular, and square) of the gel dots on catalytic activity was investigated, with round and square gel dots demonstrating slightly superior performance compared with triangular gel dots, attributed to their increased surface area. Moreover, an extended reaction period of 6 days was conducted using 4-bromobenzaldehyde and acrylonitrile, resulting in a conversion rate exceeding 70%, which remained stable for 5 days before experiencing a slight decline due to product accumulation on the gel dots. article_number: '14448' article_type: original author: - first_name: Naresh full_name: Killi, Naresh last_name: Killi - first_name: Amit full_name: Kumar, Amit last_name: Kumar - first_name: Leena full_name: Nebhani, Leena last_name: Nebhani - first_name: Franziska full_name: Obst, Franziska last_name: Obst - first_name: Andreas full_name: Richter, Andreas last_name: Richter - first_name: Bernhard full_name: Reineke Matsudo, Bernhard last_name: Reineke Matsudo - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Dirk full_name: Kuckling, Dirk id: '287' last_name: Kuckling citation: 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 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 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} }' 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. 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.' 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. short: N. Killi, A. Kumar, L. Nebhani, F. Obst, A. Richter, B. Reineke Matsudo, T. Zentgraf, D. Kuckling, ACS Omega 11 (2026). date_created: 2026-03-10T08:23:43Z date_updated: 2026-03-10T08:27:15Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' - _id: '2' - _id: '311' doi: 10.1021/acsomega.5c09476 intvolume: ' 11' issue: '9' language: - iso: eng main_file_link: - open_access: '1' url: https://pubs.acs.org/doi/abs/10.1021/acsomega.5c09476 oa: '1' publication: ACS Omega publication_identifier: issn: - 2470-1343 - 2470-1343 publication_status: published publisher: American Chemical Society (ACS) quality_controlled: '1' status: public title: Integrating an Organocatalyst into a Polymeric Gel Framework for the Continuous Microflow Baylis–Hillman Reaction type: journal_article user_id: '30525' volume: 11 year: '2026' ... --- _id: '61523' 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. article_number: e11823 article_type: original author: - first_name: Xiao full_name: Jin, Xiao last_name: Jin - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: ama: Jin X, Zentgraf T. Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation. Advanced Materials. 2026;38. 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 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} }' 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. 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.' 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. short: X. Jin, T. Zentgraf, Advanced Materials 38 (2026). date_created: 2025-10-06T05:42:21Z date_updated: 2026-03-10T08:32:37Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1002/adma.202511823 intvolume: ' 38' language: - iso: eng main_file_link: - open_access: '1' url: https://advanced.onlinelibrary.wiley.com/doi/10.1002/adma.202511823 oa: '1' project: - _id: '53' name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '54' name: TRR 142 - Project Area A - _id: '55' name: TRR 142 - Project Area B - _id: '65' name: 'TRR 142; TP A08: Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten' - _id: '170' name: 'TRR 142; TP B09: Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen' publication: Advanced Materials publication_identifier: issn: - 0935-9648 - 1521-4095 publication_status: published publisher: Wiley quality_controlled: '1' status: public title: Independent Wavefront Multiplexing with Metasurfaces via Non‐Injective Transformation type: journal_article user_id: '30525' volume: 38 year: '2026' ... --- _id: '64978' 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." article_number: '26010' article_type: original author: - first_name: Xiao full_name: Jin, Xiao last_name: Jin - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: 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 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 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} }' 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. 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.' 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. short: X. Jin, T. Zentgraf, Advanced Photonics 8 (2026). date_created: 2026-03-16T07:17:52Z date_updated: 2026-03-16T07:20:07Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1117/1.ap.8.2.026010 intvolume: ' 8' issue: '02' language: - iso: eng main_file_link: - open_access: '1' url: https://www.researching.cn/Articles/OJafd1e3b9e643c6be oa: '1' publication: Advanced Photonics publication_identifier: issn: - 2577-5421 publication_status: published publisher: SPIE-Intl Soc Optical Eng quality_controlled: '1' status: public title: Increasing the design degree of freedom for polarization through multilayer synchronous polarization projection type: journal_article user_id: '30525' volume: 8 year: '2026' ... --- _id: '65094' abstract: - lang: eng 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 " article_number: '034031' author: - first_name: Franz full_name: Roeder, Franz id: '88149' last_name: Roeder - first_name: René full_name: Pollmann, René id: '78890' last_name: Pollmann - first_name: Viktor full_name: Quiring, Viktor last_name: Quiring - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: ama: Roeder F, Pollmann R, Quiring V, Eigner C, Brecht B, Silberhorn C. Toward integrated sensors for optimized optical coherence tomography with undetected photons. Physical Review Applied. 2026;25(3). doi: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 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} }' 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. 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.' 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. short: F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, C. Silberhorn, Physical Review Applied 25 (2026). date_created: 2026-03-23T12:28:33Z date_updated: 2026-03-25T07:59:04Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1103/cwsx-42c4 intvolume: ' 25' issue: '3' language: - iso: eng publication: Physical Review Applied publication_identifier: issn: - 2331-7019 publication_status: published publisher: American Physical Society (APS) status: public title: Toward integrated sensors for optimized optical coherence tomography with undetected photons type: journal_article user_id: '27150' volume: 25 year: '2026' ... --- _id: '65096' abstract: - lang: eng 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 " article_number: '548' author: - first_name: Patrick Fabian full_name: Folge, Patrick Fabian id: '88605' last_name: Folge - first_name: Laura Maria full_name: Serino, Laura Maria id: '88242' last_name: Serino - first_name: Ladislav full_name: Mišta, Ladislav last_name: Mišta - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Jaroslav full_name: Řeháček, Jaroslav last_name: Řeháček - first_name: Zdeněk full_name: Hradil, Zdeněk last_name: Hradil citation: 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 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 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} }' 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. 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.' 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. short: P.F. Folge, L.M. Serino, L. Mišta, B. Brecht, C. Silberhorn, J. Řeháček, Z. Hradil, Optica 13 (2026). date_created: 2026-03-23T12:30:02Z date_updated: 2026-03-25T07:59:23Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1364/optica.579459 intvolume: ' 13' issue: '3' language: - iso: eng publication: Optica publication_identifier: issn: - 2334-2536 publication_status: published publisher: Optica Publishing Group status: public title: Quantum-limited detection of the arrival time and the carrier frequency of time-dependent signals type: journal_article user_id: '27150' volume: 13 year: '2026' ... --- _id: '63451' abstract: - lang: eng 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. article_number: '016102' author: - first_name: Timon full_name: Schapeler, Timon id: '55629' last_name: Schapeler orcid: 0000-0001-7652-1716 - first_name: Isabell full_name: Mischke, Isabell last_name: Mischke - first_name: Fabian full_name: Schlue, Fabian id: '63579' last_name: Schlue - first_name: Michael full_name: Stefszky, Michael id: '42777' last_name: Stefszky - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley 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 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 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} }' 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. 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.' 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. short: T. Schapeler, I. Mischke, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley, APL Quantum 3 (2026). date_created: 2026-01-05T10:00:58Z date_updated: 2026-03-25T08:00:27Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1063/5.0304127 intvolume: ' 3' issue: '1' language: - iso: eng main_file_link: - open_access: '1' oa: '1' project: - _id: '191' name: 'PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform' - _id: '239' name: 'ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications' publication: APL Quantum publication_identifier: issn: - 2835-0103 publication_status: published publisher: AIP Publishing status: public title: Practical considerations for assignment of photon numbers with SNSPDs type: journal_article user_id: '27150' volume: 3 year: '2026' ... --- _id: '65095' abstract: - lang: eng 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 " article_number: '032420' author: - first_name: Laura Maria full_name: Serino, Laura Maria id: '88242' last_name: Serino - first_name: Giovanni full_name: Chesi, Giovanni last_name: Chesi - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Lorenzo full_name: Maccone, Lorenzo last_name: Maccone - first_name: Chiara full_name: Macchiavello, Chiara last_name: Macchiavello - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: 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 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 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} }' 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. 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.' 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. short: L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn, Physical Review A 113 (2026). date_created: 2026-03-23T12:29:23Z date_updated: 2026-03-25T07:59:36Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1103/f6c4-jtlc intvolume: ' 113' issue: '3' language: - iso: eng publication: Physical Review A publication_identifier: issn: - 2469-9926 - 2469-9934 publication_status: published publisher: American Physical Society (APS) status: public title: Experimental entropic uncertainty relations in dimensions three to five type: journal_article user_id: '27150' volume: 113 year: '2026' ... --- _id: '65357' author: - first_name: Minjun full_name: Kim, Minjun last_name: Kim - first_name: Vasanthan full_name: Devaraj, Vasanthan last_name: Devaraj - first_name: Hyeon-Seok full_name: Seo, Hyeon-Seok last_name: Seo - first_name: Seongjae full_name: Eom, Seongjae last_name: Eom - first_name: Jeong-Su full_name: Lee, Jeong-Su last_name: Lee - first_name: Donghan full_name: Lee, Donghan last_name: Lee - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Jong-Min full_name: Lee, Jong-Min last_name: Lee - first_name: Min Yong full_name: Jeon, Min Yong last_name: Jeon citation: 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' 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. 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. 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.' date_created: 2026-04-07T04:29:28Z date_updated: 2026-04-07T04:30:07Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1117/12.3095416 editor: - first_name: Manijeh full_name: Razeghi, Manijeh last_name: Razeghi - first_name: Giti A. full_name: Khodaparast, Giti A. last_name: Khodaparast - first_name: Miriam S. full_name: Vitiello, Miriam S. last_name: Vitiello language: - iso: eng publication: Quantum Sensing and Nano Electronics and Photonics XXII publication_status: published publisher: SPIE status: public title: Fabrication of uniform, high-field-enhanced plasmonic satellite clusters using multidewetting type: conference user_id: '30525' year: '2026' ... --- _id: '65460' 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. " article_number: acsphotonics.6c00096 article_type: original author: - first_name: Rebecca full_name: Aschwanden, Rebecca last_name: Aschwanden - first_name: Nicolás full_name: Claro-Rodríguez, Nicolás last_name: Claro-Rodríguez - first_name: Ruizhe full_name: Zhao, Ruizhe last_name: Zhao - first_name: Patricia Anna Maria full_name: Kallert, Patricia Anna Maria id: '72332' last_name: Kallert orcid: 0009-0007-5230-0223 - first_name: Tobias full_name: Krieger, Tobias last_name: Krieger - first_name: Quirin full_name: Buchinger, Quirin last_name: Buchinger - first_name: Saimon F. full_name: Covre da Silva, Saimon F. last_name: Covre da Silva - first_name: Sandra full_name: Stroj, Sandra last_name: Stroj - first_name: Michele full_name: Rota, Michele last_name: Rota - first_name: Sven full_name: Höfling, Sven last_name: Höfling - first_name: Tobias full_name: Huber-Loyola, Tobias last_name: Huber-Loyola - first_name: Armando full_name: Rastelli, Armando last_name: Rastelli - first_name: Rinaldo full_name: Trotta, Rinaldo last_name: Trotta - first_name: Lingling full_name: Huang, Lingling last_name: Huang - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: 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 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 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} }' 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. 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.' 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. 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). date_created: 2026-04-20T04:52:59Z date_updated: 2026-04-20T05:01:00Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1021/acsphotonics.6c00096 external_id: arxiv: - '2603.25090' keyword: - metasurface - beamsplitter - interferometer - quantum network - single photons - nanophotonics language: - iso: eng main_file_link: - url: https://pubs.acs.org/doi/10.1021/acsphotonics.6c00096 project: - _id: '54' name: TRR 142 - Project Area A - _id: '65' name: 'TRR 142; TP A08: Nichtlineare Kopplung von Zwischenschicht-Exzitonen in van der Waals-Heterostrukturen an plasmonische und dielektrische Nanokavitäten' - _id: '53' name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' publication: ACS Photonics publication_identifier: issn: - 2330-4022 - 2330-4022 publication_status: published publisher: American Chemical Society (ACS) quality_controlled: '1' status: public title: Cascaded Metasurface Interferometer for Multipath Interference with Classical and Quantum Light type: journal_article user_id: '30525' year: '2026' ... --- _id: '65316' 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. author: - first_name: Helene full_name: Wetter, Helene last_name: Wetter - first_name: Jan full_name: Wingenbach, Jan id: '69187' last_name: Wingenbach - first_name: Falk full_name: Rehberg, Falk last_name: Rehberg - first_name: Wenlong full_name: Gao, Wenlong last_name: Gao - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 citation: 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 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 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} }' 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.' 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.' 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. short: H. Wetter, J. Wingenbach, F. Rehberg, W. Gao, S. Schumacher, T. Zentgraf, ACS Photonics 13 (2026) 2128–2133. date_created: 2026-04-02T07:25:30Z date_updated: 2026-04-20T05:09:57Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1021/acsphotonics.5c02865 external_id: arxiv: - '2512.14452' intvolume: ' 13' keyword: - metasurface - waveguides - Dirac point - polarization - negative coupling language: - iso: eng main_file_link: - url: https://pubs.acs.org/doi/10.1021/acsphotonics.5c02865 page: 2128-2133 publication: ACS Photonics publication_identifier: issn: - 2330-4022 - 2330-4022 publication_status: published publisher: American Chemical Society (ACS) quality_controlled: '1' status: public title: Polarization- and Wave-Vector Selective Optical Metasurface with Near-Field Coupling type: journal_article user_id: '30525' volume: 13 year: '2026' ... --- _id: '65655' abstract: - lang: eng 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. article_type: original author: - first_name: Minjun full_name: Kim, Minjun last_name: Kim - first_name: Damun full_name: Heo, Damun last_name: Heo - first_name: Sung Yoon full_name: Cho, Sung Yoon last_name: Cho - first_name: Ye-Won full_name: Lee, Ye-Won last_name: Lee - first_name: Sun-Hwa full_name: Gu, Sun-Hwa last_name: Gu - first_name: Samir full_name: Adhikari, Samir last_name: Adhikari - first_name: Donghan full_name: Lee, Donghan last_name: Lee - first_name: Seok Soon full_name: Jeong, Seok Soon last_name: Jeong - first_name: Hyuck Soo full_name: Kim, Hyuck Soo last_name: Kim - first_name: Vasanthan full_name: Devaraj, Vasanthan last_name: Devaraj - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Min Yong full_name: Jeon, Min Yong last_name: Jeon - first_name: Jong-Min full_name: Lee, Jong-Min last_name: Lee citation: 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 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} }' 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.' 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.' 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. 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. date_created: 2026-05-20T06:53:30Z date_updated: 2026-05-20T06:55:49Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1039/d5nr03414k intvolume: ' 18' issue: '8' language: - iso: eng main_file_link: - url: https://pubs.rsc.org/en/content/articlelanding/2026/nr/d5nr03414k page: 4292-4299 publication: Nanoscale publication_identifier: issn: - 2040-3364 - 2040-3372 publication_status: published publisher: Royal Society of Chemistry (RSC) quality_controlled: '1' status: public title: A functionalization-free plasmonic hole-sphere nanogap SERS platform for reliable on-site analysis and oxide-state classification type: journal_article user_id: '30525' volume: 18 year: '2026' ... --- _id: '65847' 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. article_number: '89' article_type: original author: - first_name: Jan-Lucas full_name: Eickmann, Jan-Lucas id: '73665' last_name: Eickmann orcid: 0009-0008-6524-7684 - first_name: Kai-Hong full_name: Luo, Kai-Hong id: '36389' last_name: Luo orcid: 0000-0003-1008-4976 - first_name: Mikhail full_name: Roiz, Mikhail id: '114114' last_name: Roiz - first_name: Jonas full_name: Lammers, Jonas last_name: Lammers - first_name: Simone full_name: Atzeni, Simone id: '98338' last_name: Atzeni - first_name: Cheeranjiv full_name: Pandey, Cheeranjiv last_name: Pandey - first_name: Florian full_name: Lütkewitte, Florian last_name: Lütkewitte - first_name: Reza G. full_name: Shirazi, Reza G. last_name: Shirazi - first_name: Fabian full_name: Schlue, Fabian id: '63579' last_name: Schlue - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Vladimir V. full_name: Rybkin, Vladimir V. last_name: Rybkin - first_name: Michael full_name: Stefszky, Michael id: '42777' last_name: Stefszky - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: 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' 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' 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} }' 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.' 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.' 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.' 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). date_created: 2026-06-12T08:14:35Z date_updated: 2026-06-12T08:28:02Z department: - _id: '288' - _id: '623' - _id: '15' doi: 10.1038/s41534-026-01250-x intvolume: ' 12' issue: '1' language: - iso: eng main_file_link: - open_access: '1' url: https://www.nature.com/articles/s41534-026-01250-x.pdf oa: '1' project: - _id: '191' name: 'PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform' publication: npj Quantum Information publication_identifier: issn: - 2056-6387 publication_status: published publisher: Springer Science and Business Media LLC related_material: link: - relation: research_data url: https://doi.org/10.5281/zenodo.18969354 status: public title: 'Bridging chemistry and Gaussian boson sampling: a photonic hierarchy of approximations for molecular vibronic spectra' type: journal_article user_id: '73665' volume: 12 year: '2026' ... --- _id: '65906' article_number: '1407507' author: - first_name: Xiao full_name: Jin, Xiao last_name: Jin - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 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' 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 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} }' 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. 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.' 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.' conference: location: Strasbourg, France name: SPIE Photonics Europe 2026 date_created: 2026-06-16T07:37:13Z date_updated: 2026-06-16T07:40:15Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1117/12.3096579 editor: - first_name: Kevin F. full_name: MacDonald, Kevin F. last_name: MacDonald - first_name: Anatoly V. full_name: Zayats, Anatoly V. last_name: Zayats - first_name: Isabelle full_name: Staude, Isabelle last_name: Staude intvolume: ' 14075' language: - iso: eng 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 publication: Metamaterials XV publication_status: published publisher: SPIE status: public title: OAM-multiplexed holography via cascaded metasurfaces without post sampling and position multiplexing type: conference user_id: '30525' volume: 14075 year: '2026' ... --- _id: '66555' 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.' article_number: e71610 article_type: original author: - first_name: Minjun full_name: Kim, Minjun last_name: Kim - first_name: Vasanthan full_name: Devaraj, Vasanthan id: '103814' last_name: Devaraj - first_name: Hyeon‐Seok full_name: Seo, Hyeon‐Seok last_name: Seo - first_name: Seong‐Jae full_name: Eom, Seong‐Jae last_name: Eom - first_name: Jeong‐Su full_name: Lee, Jeong‐Su last_name: Lee - first_name: Donghan full_name: Lee, Donghan last_name: Lee - first_name: Min Yong full_name: Jeon, Min Yong last_name: Jeon - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Jong‐Min full_name: Lee, Jong‐Min last_name: Lee citation: 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 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 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} }' 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. 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.' 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. 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). date_created: 2026-07-22T05:49:50Z date_updated: 2026-07-22T05:52:38Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1002/lpor.71610 language: - iso: eng main_file_link: - open_access: '1' url: https://onlinelibrary.wiley.com/doi/10.1002/lpor.71610 oa: '1' publication: Laser & Photonics Reviews publication_identifier: issn: - 1863-8880 - 1863-8899 publication_status: published publisher: Wiley quality_controlled: '1' status: public title: Engineering Disordered Many‐Particle Plasmonic Nanoclusters for Wafer‐Scale Uniform and Giant Electromagnetic Field Enhancement type: journal_article user_id: '30525' year: '2026' ... --- _id: '66741' 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 " article_number: '074509' author: - first_name: Martin full_name: Houde, Martin last_name: Houde - first_name: Franz full_name: Roeder, Franz id: '88149' last_name: Roeder - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Nicolás full_name: Quesada, Nicolás last_name: Quesada citation: 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 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} }' 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. 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.' 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. short: M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, New Journal of Physics 28 (2026). date_created: 2026-08-18T10:21:08Z date_updated: 2026-08-18T10:21:29Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1088/1367-2630/ae8692 intvolume: ' 28' issue: '7' language: - iso: eng publication: New Journal of Physics publication_identifier: issn: - 1367-2630 publication_status: published publisher: IOP Publishing status: public title: High-gain effects in broadband continuous-wave parametric down conversion sources and measurements with undetected photons type: journal_article user_id: '27150' volume: 28 year: '2026' ... --- _id: '66740' abstract: - lang: eng 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 " article_number: '035013' author: - first_name: Martin full_name: Houde, Martin last_name: Houde - first_name: Franz full_name: Roeder, Franz id: '88149' last_name: Roeder - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Nicolás full_name: Quesada, Nicolás last_name: Quesada citation: 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' 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' 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} }' 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.' 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.' 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.' short: 'M. Houde, F. Roeder, C. Silberhorn, B. Brecht, N. Quesada, Journal of Physics: Photonics 8 (2026).' date_created: 2026-08-18T10:20:21Z date_updated: 2026-08-18T10:20:54Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1088/2515-7647/ae82a2 intvolume: ' 8' issue: '3' language: - iso: eng publication: 'Journal of Physics: Photonics' publication_identifier: issn: - 2515-7647 publication_status: published publisher: IOP Publishing status: public title: Quantum fisher information analysis for absorption measurements with undetected photons type: journal_article user_id: '27150' volume: 8 year: '2026' ... --- _id: '66094' abstract: - lang: eng text: The two-qubit controlled-not (C-NOT) gate is an essential component for gate-based quantum circuits. In fact, its operation, combined with single qubit rotations allows to realise any quantum circuit. Several strategies have been adopted in order to build quantum gates. Among them, photonics offers the dual advantage of excellent isolation from the environment and ease of manipulation at the single qubit level. Here we adopt a scalable time-multiplexed approach in order to build a fully reconfigurable architecture capable of implementing a post-selected C-NOT gate with a fidelity of (93.8 ± 1.4)%. We then show how our time-multiplexed platform can be employed to combine a C-NOT and a single qubit gate in order to generate the four Bell states. article_number: '5683' article_type: original author: - first_name: Federico full_name: Pegoraro, Federico id: '88928' last_name: Pegoraro - first_name: Philip full_name: Held, Philip id: '68236' last_name: Held - first_name: Jonas full_name: Lammers, Jonas last_name: Lammers - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: ama: Pegoraro F, Held P, Lammers J, Brecht B, Silberhorn C. Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor. Nature Communications. 2026;17(1). doi:10.1038/s41467-026-74861-9 apa: Pegoraro, F., Held, P., Lammers, J., Brecht, B., & Silberhorn, C. (2026). Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor. Nature Communications, 17(1), Article 5683. https://doi.org/10.1038/s41467-026-74861-9 bibtex: '@article{Pegoraro_Held_Lammers_Brecht_Silberhorn_2026, title={Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor}, volume={17}, DOI={10.1038/s41467-026-74861-9}, number={15683}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Pegoraro, Federico and Held, Philip and Lammers, Jonas and Brecht, Benjamin and Silberhorn, Christine}, year={2026} }' chicago: Pegoraro, Federico, Philip Held, Jonas Lammers, Benjamin Brecht, and Christine Silberhorn. “Demonstration of a Quantum C-NOT Gate in a Time-Multiplexed Fully Reconfigurable Photonic Processor.” Nature Communications 17, no. 1 (2026). https://doi.org/10.1038/s41467-026-74861-9. ieee: 'F. Pegoraro, P. Held, J. Lammers, B. Brecht, and C. Silberhorn, “Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor,” Nature Communications, vol. 17, no. 1, Art. no. 5683, 2026, doi: 10.1038/s41467-026-74861-9.' mla: Pegoraro, Federico, et al. “Demonstration of a Quantum C-NOT Gate in a Time-Multiplexed Fully Reconfigurable Photonic Processor.” Nature Communications, vol. 17, no. 1, 5683, Springer Science and Business Media LLC, 2026, doi:10.1038/s41467-026-74861-9. short: F. Pegoraro, P. Held, J. Lammers, B. Brecht, C. Silberhorn, Nature Communications 17 (2026). date_created: 2026-07-01T07:47:15Z date_updated: 2026-07-01T08:15:21Z department: - _id: '288' - _id: '623' - _id: '15' doi: 10.1038/s41467-026-74861-9 intvolume: ' 17' issue: '1' keyword: - Photonic Quantum Computing - Time-multiplexing - Quantum Information language: - iso: eng main_file_link: - open_access: '1' url: https://www.nature.com/articles/s41467-026-74861-9 oa: '1' publication: Nature Communications publication_identifier: issn: - 2041-1723 publication_status: published publisher: Springer Science and Business Media LLC related_material: link: - description: Supplementary notes to the main article relation: supplementary_material url: https://static-content.springer.com/esm/art%3A10.1038%2Fs41467-026-74861-9/MediaObjects/41467_2026_74861_MOESM1_ESM.pdf - description: Datasets and code relation: supplementary_material url: https://doi.org/10.5281/zenodo.20396394 status: public title: Demonstration of a quantum C-NOT gate in a time-multiplexed fully reconfigurable photonic processor type: journal_article user_id: '88928' volume: 17 year: '2026' ... --- _id: '66632' abstract: - lang: eng text: Three‐dimensional (3D) assemblies of gold nanoparticles (AuNPs) offer a rich platform for plasmonic coupling and near‐field engineering, yet their optical behavior is often complex due to structural disorder and fabrication‐induced variability. Here, we present a systematic optical investigation of large‐scale 3D AuNP assemblies fabricated via meniscus‐guided assembly, focusing on the reproducibility, spatial uniformity, and mode evolution of their plasmonic responses. Spatially‐resolved dark‐field scattering measurements reveal that high‐aspect‐ratio AuNP pillars exhibit uniform scattering spectra along their height and across different pillars, despite variations in geometry and structure. Electromagnetic simulations suggest that this robustness arises from a collective many‐particle plasmonic response that remains optically active despite structural perturbations. The corresponding near‐field and surface‐charge distributions remain spatially distributed under representative structural perturbations, consistent with volumetric averaging across the three‐dimensional assembly. Building on this robust platform, we introduce compositional modulation through a core–satellite architecture by incorporating smaller AuNPs. This yields a composition‐dependent spectral redistribution, including the emergence of an additional long‐wavelength spectral feature in the core–satellite assemblies. Wavelength‐dependent surface‐enhanced Raman scattering measurements reveal contrasting responses under 633 and 785 nm excitation, reflecting redistribution of local plasmonic coupling pathways. These results provide process‐enabled guidelines for using meniscus‐guided 3D‐nanoprinting to realize robust nanoparticle assemblies. article_number: e71686 article_type: original author: - first_name: Vasanthan full_name: Devaraj, Vasanthan id: '103814' last_name: Devaraj - first_name: Sunghyun full_name: Kwak, Sunghyun last_name: Kwak - first_name: Hyeongjip full_name: Kim, Hyeongjip last_name: Kim - first_name: Sang‐Keun full_name: Sung, Sang‐Keun last_name: Sung - first_name: Jong‐Min full_name: Lee, Jong‐Min last_name: Lee - first_name: Thomas full_name: Zentgraf, Thomas id: '30525' last_name: Zentgraf orcid: 0000-0002-8662-1101 - first_name: Won‐Geun full_name: Kim, Won‐Geun last_name: Kim citation: ama: Devaraj V, Kwak S, Kim H, et al. Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies. Laser &amp; Photonics Reviews. Published online 2026. doi:10.1002/lpor.71686 apa: Devaraj, V., Kwak, S., Kim, H., Sung, S., Lee, J., Zentgraf, T., & Kim, W. (2026). Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies. Laser &amp; Photonics Reviews, Article e71686. https://doi.org/10.1002/lpor.71686 bibtex: '@article{Devaraj_Kwak_Kim_Sung_Lee_Zentgraf_Kim_2026, title={Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies}, DOI={10.1002/lpor.71686}, number={e71686}, journal={Laser &amp; Photonics Reviews}, publisher={Wiley}, author={Devaraj, Vasanthan and Kwak, Sunghyun and Kim, Hyeongjip and Sung, Sang‐Keun and Lee, Jong‐Min and Zentgraf, Thomas and Kim, Won‐Geun}, year={2026} }' chicago: Devaraj, Vasanthan, Sunghyun Kwak, Hyeongjip Kim, Sang‐Keun Sung, Jong‐Min Lee, Thomas Zentgraf, and Won‐Geun Kim. “Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies.” Laser &amp; Photonics Reviews, 2026. https://doi.org/10.1002/lpor.71686. ieee: 'V. Devaraj et al., “Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies,” Laser &amp; Photonics Reviews, Art. no. e71686, 2026, doi: 10.1002/lpor.71686.' mla: Devaraj, Vasanthan, et al. “Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies.” Laser &amp; Photonics Reviews, e71686, Wiley, 2026, doi:10.1002/lpor.71686. short: V. Devaraj, S. Kwak, H. Kim, S. Sung, J. Lee, T. Zentgraf, W. Kim, Laser &amp; Photonics Reviews (2026). date_created: 2026-08-03T06:43:03Z date_updated: 2026-08-03T06:45:01Z department: - _id: '15' - _id: '230' - _id: '289' - _id: '623' doi: 10.1002/lpor.71686 language: - iso: eng main_file_link: - open_access: '1' url: https://onlinelibrary.wiley.com/doi/10.1002/lpor.71686 oa: '1' publication: Laser & Photonics Reviews publication_identifier: issn: - 1863-8880 - 1863-8899 publication_status: published publisher: Wiley quality_controlled: '1' status: public title: Spatially Uniform and Defect‐Tolerant Plasmonic Responses in 3D Printed Gold Nanoparticle Assemblies type: journal_article user_id: '30525' year: '2026' ...