[{"year":"2026","citation":{"apa":"Taheri, B., Kopylov, D., Hammer, M., Meier, T., Förstner, J., & Sharapova, P. R. (2026). Gain-induced spectral non-degeneracy in type-II parametric down-conversion. ArXiv. https://doi.org/10.48550/ARXIV.2603.01656","bibtex":"@article{Taheri_Kopylov_Hammer_Meier_Förstner_Sharapova_2026, title={Gain-induced spectral non-degeneracy in type-II parametric down-conversion}, DOI={10.48550/ARXIV.2603.01656}, journal={arXiv}, author={Taheri, Behnood and Kopylov, Denis and Hammer, Manfred and Meier, Torsten and Förstner, Jens and Sharapova, Polina R.}, year={2026} }","mla":"Taheri, Behnood, et al. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” ArXiv, 2026, doi:10.48550/ARXIV.2603.01656.","short":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, P.R. Sharapova, ArXiv (2026).","ieee":"B. Taheri, D. Kopylov, M. Hammer, T. Meier, J. Förstner, and P. R. Sharapova, “Gain-induced spectral non-degeneracy in type-II parametric down-conversion,” arXiv, 2026, doi: 10.48550/ARXIV.2603.01656.","chicago":"Taheri, Behnood, Denis Kopylov, Manfred Hammer, Torsten Meier, Jens Förstner, and Polina R. Sharapova. “Gain-Induced Spectral Non-Degeneracy in Type-II Parametric down-Conversion.” ArXiv, 2026. https://doi.org/10.48550/ARXIV.2603.01656.","ama":"Taheri B, Kopylov D, Hammer M, Meier T, Förstner J, Sharapova PR. Gain-induced spectral non-degeneracy in type-II parametric down-conversion. arXiv. Published online 2026. doi:10.48550/ARXIV.2603.01656"},"title":"Gain-induced spectral non-degeneracy in type-II parametric down-conversion","doi":"10.48550/ARXIV.2603.01656","date_updated":"2026-03-10T15:41:18Z","author":[{"full_name":"Taheri, Behnood","last_name":"Taheri","first_name":"Behnood"},{"first_name":"Denis","full_name":"Kopylov, Denis","id":"98502","last_name":"Kopylov"},{"full_name":"Hammer, Manfred","id":"48077","last_name":"Hammer","orcid":"0000-0002-6331-9348","first_name":"Manfred"},{"id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"},{"full_name":"Sharapova, Polina R.","id":"60286","last_name":"Sharapova","first_name":"Polina R."}],"date_created":"2026-03-10T15:37:22Z","status":"public","type":"journal_article","publication":"arXiv","language":[{"iso":"eng"}],"project":[{"_id":"168","name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"}],"_id":"64877","user_id":"16199","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"34"},{"_id":"61"},{"_id":"230"},{"_id":"623"},{"_id":"429"}]},{"_id":"63744","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"35"},{"_id":"429"}],"user_id":"55907","article_type":"original","article_number":"016112","type":"journal_article","status":"public","oa":"1","date_updated":"2026-02-01T13:19:20Z","volume":10,"author":[{"orcid":"0009-0007-5654-5412","last_name":"Scharwald","id":"55907","full_name":"Scharwald, Dennis","first_name":"Dennis"},{"first_name":"Lucas","last_name":"Gehse","full_name":"Gehse, Lucas"},{"first_name":"Polina","last_name":"Sharapova","id":"60286","full_name":"Sharapova, Polina"}],"doi":"10.1063/5.0229802","main_file_link":[{"url":"https://pubs.aip.org/aip/app/article-pdf/doi/10.1063/5.0229802/20352749/016112_1_5.0229802.pdf","open_access":"1"}],"publication_identifier":{"issn":["2378-0967"]},"publication_status":"published","intvolume":" 10","citation":{"bibtex":"@article{Scharwald_Gehse_Sharapova_2025, title={Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams}, volume={10}, DOI={10.1063/5.0229802}, number={1016112}, journal={APL Photonics}, publisher={AIP Publishing}, author={Scharwald, Dennis and Gehse, Lucas and Sharapova, Polina}, year={2025} }","short":"D. Scharwald, L. Gehse, P. Sharapova, APL Photonics 10 (2025).","mla":"Scharwald, Dennis, et al. “Schmidt Modes Carrying Orbital Angular Momentum Generated by Cascaded Systems Pumped with Laguerre–Gaussian Beams.” APL Photonics, vol. 10, no. 1, 016112, AIP Publishing, 2025, doi:10.1063/5.0229802.","apa":"Scharwald, D., Gehse, L., & Sharapova, P. (2025). Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams. APL Photonics, 10(1), Article 016112. https://doi.org/10.1063/5.0229802","ama":"Scharwald D, Gehse L, Sharapova P. Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams. APL Photonics. 2025;10(1). doi:10.1063/5.0229802","ieee":"D. Scharwald, L. Gehse, and P. Sharapova, “Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams,” APL Photonics, vol. 10, no. 1, Art. no. 016112, 2025, doi: 10.1063/5.0229802.","chicago":"Scharwald, Dennis, Lucas Gehse, and Polina Sharapova. “Schmidt Modes Carrying Orbital Angular Momentum Generated by Cascaded Systems Pumped with Laguerre–Gaussian Beams.” APL Photonics 10, no. 1 (2025). https://doi.org/10.1063/5.0229802."},"language":[{"iso":"eng"}],"publication":"APL Photonics","abstract":[{"lang":"eng","text":"Orbital angular momentum (OAM) modes are an important resource used in various branches of quantum science and technology due to their unique helical structure and countably infinite basis. Generating light that simultaneously carries high-order orbital angular momenta and exhibits quantum correlations is a challenging task. In this work, we present a theoretical approach to the generation of correlated Schmidt modes carrying OAM via parametric down-conversion (PDC) in cascaded nonlinear systems (nonlinear interferometers) pumped by Laguerre–Gaussian beams. We demonstrate how the number of generated modes and their population can be controlled by varying the pump parameters, the gain of the PDC process, and the distance between the crystals. We investigate the angular displacement measurement uncertainty of these interferometers and demonstrate that it can overcome the classical shot noise limit."}],"publisher":"AIP Publishing","date_created":"2026-01-26T15:48:54Z","title":"Schmidt modes carrying orbital angular momentum generated by cascaded systems pumped with Laguerre–Gaussian beams","issue":"1","year":"2025"},{"_id":"63745","project":[{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"35"},{"_id":"429"}],"user_id":"55907","article_type":"original","article_number":"36","language":[{"iso":"eng"}],"publication":"Optica Quantum","type":"journal_article","abstract":[{"lang":"eng","text":"Multimode squeezed light is an increasingly popular tool in photonic quantum technologies, including sensing, imaging, and computation. Meanwhile, the existing methods of its characterization are technically complicated, which reduces the level of squeezing, and mostly deal with a single mode at a time. Here, for the first time, to the best of our knowledge, we employ optical parametric amplification to characterize multiple squeezing eigenmodes simultaneously. We retrieve the shapes and squeezing degrees of all modes at once through direct detection followed by modal decomposition. This method is tolerant to inefficient detection and does not require a local oscillator. For a spectrally and spatially multimode squeezed vacuum, we characterize eight strongest spatial modes, obtaining squeezing and anti-squeezing values of up to −5.2 ± 0.2 dB and 8.6 ± 0.3 dB, respectively, despite the 50% detection loss. This work, being the first exploration of an optical parametric amplifier’s multimode capability for squeezing detection, paves the way for the real-time detection of multimode squeezing."}],"status":"public","date_updated":"2026-02-10T22:44:44Z","publisher":"Optica Publishing Group","oa":"1","volume":3,"date_created":"2026-01-26T15:57:13Z","author":[{"full_name":"Barakat, Ismail","last_name":"Barakat","first_name":"Ismail"},{"last_name":"Kalash","full_name":"Kalash, Mahmoud","first_name":"Mahmoud"},{"id":"55907","full_name":"Scharwald, Dennis","orcid":"0009-0007-5654-5412","last_name":"Scharwald","first_name":"Dennis"},{"id":"60286","full_name":"Sharapova, Polina","last_name":"Sharapova","first_name":"Polina"},{"first_name":"Norbert","full_name":"Lindlein, Norbert","last_name":"Lindlein"},{"first_name":"Maria","last_name":"Chekhova","full_name":"Chekhova, Maria"}],"title":"Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification","doi":"10.1364/opticaq.524682","main_file_link":[{"url":"https://opg.optica.org/opticaq/viewmedia.cfm?uri=opticaq-3-1-36&seq=0","open_access":"1"}],"publication_identifier":{"issn":["2837-6714"]},"publication_status":"published","issue":"1","year":"2025","intvolume":" 3","citation":{"ama":"Barakat I, Kalash M, Scharwald D, Sharapova P, Lindlein N, Chekhova M. Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification. Optica Quantum. 2025;3(1). doi:10.1364/opticaq.524682","ieee":"I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, and M. Chekhova, “Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification,” Optica Quantum, vol. 3, no. 1, Art. no. 36, 2025, doi: 10.1364/opticaq.524682.","chicago":"Barakat, Ismail, Mahmoud Kalash, Dennis Scharwald, Polina Sharapova, Norbert Lindlein, and Maria Chekhova. “Simultaneous Measurement of Multimode Squeezing through Multimode Phase-Sensitive Amplification.” Optica Quantum 3, no. 1 (2025). https://doi.org/10.1364/opticaq.524682.","short":"I. Barakat, M. Kalash, D. Scharwald, P. Sharapova, N. Lindlein, M. Chekhova, Optica Quantum 3 (2025).","bibtex":"@article{Barakat_Kalash_Scharwald_Sharapova_Lindlein_Chekhova_2025, title={Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification}, volume={3}, DOI={10.1364/opticaq.524682}, number={136}, journal={Optica Quantum}, publisher={Optica Publishing Group}, author={Barakat, Ismail and Kalash, Mahmoud and Scharwald, Dennis and Sharapova, Polina and Lindlein, Norbert and Chekhova, Maria}, year={2025} }","mla":"Barakat, Ismail, et al. “Simultaneous Measurement of Multimode Squeezing through Multimode Phase-Sensitive Amplification.” Optica Quantum, vol. 3, no. 1, 36, Optica Publishing Group, 2025, doi:10.1364/opticaq.524682.","apa":"Barakat, I., Kalash, M., Scharwald, D., Sharapova, P., Lindlein, N., & Chekhova, M. (2025). Simultaneous measurement of multimode squeezing through multimode phase-sensitive amplification. Optica Quantum, 3(1), Article 36. https://doi.org/10.1364/opticaq.524682"}},{"issue":"10","year":"2025","date_created":"2025-07-09T08:58:32Z","publisher":"American Physical Society (APS)","title":"Microscopic origin of gray tracks in KTiOPO4","publication":"Physical Review B","language":[{"iso":"eng"}],"publication_status":"published","publication_identifier":{"issn":["2469-9950","2469-9969"]},"citation":{"apa":"Bocchini, A., Gerstmann, U., & Schmidt, W. G. (2025). Microscopic origin of gray tracks in <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>. Physical Review B, 111(10), Article 104103. https://doi.org/10.1103/physrevb.111.104103","short":"A. Bocchini, U. Gerstmann, W.G. Schmidt, Physical Review B 111 (2025).","mla":"Bocchini, Adriana, et al. “Microscopic Origin of Gray Tracks in <mml:Math Xmlns:Mml=\"http://Www.W3.Org/1998/Math/MathML\"><mml:Msub><mml:Mi>KTiOPO</Mml:Mi><mml:Mn>4</Mml:Mn></Mml:Msub></Mml:Math>.” Physical Review B, vol. 111, no. 10, 104103, American Physical Society (APS), 2025, doi:10.1103/physrevb.111.104103.","bibtex":"@article{Bocchini_Gerstmann_Schmidt_2025, title={Microscopic origin of gray tracks in <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>}, volume={111}, DOI={10.1103/physrevb.111.104103}, number={10104103}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Bocchini, Adriana and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2025} }","ama":"Bocchini A, Gerstmann U, Schmidt WG. Microscopic origin of gray tracks in <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>. Physical Review B. 2025;111(10). doi:10.1103/physrevb.111.104103","ieee":"A. Bocchini, U. Gerstmann, and W. G. Schmidt, “Microscopic origin of gray tracks in <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:msub><mml:mi>KTiOPO</mml:mi><mml:mn>4</mml:mn></mml:msub></mml:math>,” Physical Review B, vol. 111, no. 10, Art. no. 104103, 2025, doi: 10.1103/physrevb.111.104103.","chicago":"Bocchini, Adriana, Uwe Gerstmann, and Wolf Gero Schmidt. “Microscopic Origin of Gray Tracks in <mml:Math Xmlns:Mml=\"http://Www.W3.Org/1998/Math/MathML\"><mml:Msub><mml:Mi>KTiOPO</Mml:Mi><mml:Mn>4</Mml:Mn></Mml:Msub></Mml:Math>.” Physical Review B 111, no. 10 (2025). https://doi.org/10.1103/physrevb.111.104103."},"intvolume":" 111","author":[{"first_name":"Adriana","id":"58349","full_name":"Bocchini, Adriana","orcid":"0000-0002-2134-3075","last_name":"Bocchini"},{"first_name":"Uwe","full_name":"Gerstmann, Uwe","id":"171","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"first_name":"Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt","full_name":"Schmidt, Wolf Gero","id":"468"}],"volume":111,"date_updated":"2025-07-09T09:30:31Z","doi":"10.1103/physrevb.111.104103","type":"journal_article","status":"public","user_id":"16199","department":[{"_id":"15"},{"_id":"295"},{"_id":"790"},{"_id":"230"},{"_id":"429"},{"_id":"35"},{"_id":"170"},{"_id":"27"}],"project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"grant_number":"231447078","_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"_id":"168","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","grant_number":"231447078"},{"_id":"166","name":"TRR 142 - A11: TRR 142 - Subproject A11"}],"_id":"60565","article_number":"104103"},{"author":[{"first_name":"Mohammad Amin","full_name":"Zare Pour, Mohammad Amin","last_name":"Zare Pour"},{"last_name":"Shekarabi","full_name":"Shekarabi, Sahar","first_name":"Sahar"},{"orcid":"0000-0002-4710-1170","last_name":"Ruiz Alvarado","id":"79462","full_name":"Ruiz Alvarado, Isaac Azahel","first_name":"Isaac Azahel"},{"first_name":"Jonathan","full_name":"Diederich, Jonathan","last_name":"Diederich"},{"first_name":"Yuyings","last_name":"Gao","full_name":"Gao, Yuyings"},{"full_name":"Paszuk, Agnieszka","last_name":"Paszuk","first_name":"Agnieszka"},{"full_name":"Moritz, Dominik C.","last_name":"Moritz","first_name":"Dominik C."},{"last_name":"Jaegermann","full_name":"Jaegermann, Wolfram","first_name":"Wolfram"},{"full_name":"Friedrich, Dennis","last_name":"Friedrich","first_name":"Dennis"},{"first_name":"Roel","last_name":"van de Krol","full_name":"van de Krol, Roel"},{"id":"468","full_name":"Schmidt, Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076","first_name":"Wolf Gero"},{"last_name":"Hannappel","full_name":"Hannappel, Thomas","first_name":"Thomas"}],"date_created":"2025-07-09T13:33:15Z","publisher":"Wiley","date_updated":"2025-07-09T13:54:05Z","doi":"10.1002/adfm.202423702","title":"Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction","publication_identifier":{"issn":["1616-301X","1616-3028"]},"publication_status":"published","citation":{"ieee":"M. A. Zare Pour et al., “Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction,” Advanced Functional Materials, 2025, doi: 10.1002/adfm.202423702.","chicago":"Zare Pour, Mohammad Amin, Sahar Shekarabi, Isaac Azahel Ruiz Alvarado, Jonathan Diederich, Yuyings Gao, Agnieszka Paszuk, Dominik C. Moritz, et al. “Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.” Advanced Functional Materials, 2025. https://doi.org/10.1002/adfm.202423702.","ama":"Zare Pour MA, Shekarabi S, Ruiz Alvarado IA, et al. Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction. Advanced Functional Materials. Published online 2025. doi:10.1002/adfm.202423702","mla":"Zare Pour, Mohammad Amin, et al. “Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction.” Advanced Functional Materials, Wiley, 2025, doi:10.1002/adfm.202423702.","bibtex":"@article{Zare Pour_Shekarabi_Ruiz Alvarado_Diederich_Gao_Paszuk_Moritz_Jaegermann_Friedrich_van de Krol_et al._2025, title={Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction}, DOI={10.1002/adfm.202423702}, journal={Advanced Functional Materials}, publisher={Wiley}, author={Zare Pour, Mohammad Amin and Shekarabi, Sahar and Ruiz Alvarado, Isaac Azahel and Diederich, Jonathan and Gao, Yuyings and Paszuk, Agnieszka and Moritz, Dominik C. and Jaegermann, Wolfram and Friedrich, Dennis and van de Krol, Roel and et al.}, year={2025} }","short":"M.A. Zare Pour, S. Shekarabi, I.A. Ruiz Alvarado, J. Diederich, Y. Gao, A. Paszuk, D.C. Moritz, W. Jaegermann, D. Friedrich, R. van de Krol, W.G. Schmidt, T. Hannappel, Advanced Functional Materials (2025).","apa":"Zare Pour, M. A., Shekarabi, S., Ruiz Alvarado, I. A., Diederich, J., Gao, Y., Paszuk, A., Moritz, D. C., Jaegermann, W., Friedrich, D., van de Krol, R., Schmidt, W. G., & Hannappel, T. (2025). Exploring Electronic States and Ultrafast Electron Dynamics in AlInP Window Layers: The Role of Surface Reconstruction. Advanced Functional Materials. https://doi.org/10.1002/adfm.202423702"},"year":"2025","department":[{"_id":"15"},{"_id":"170"},{"_id":"230"},{"_id":"27"},{"_id":"295"}],"user_id":"79462","_id":"60580","language":[{"iso":"eng"}],"publication":"Advanced Functional Materials","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"AbstractAlInP (001) is widely utilized as a window layer in optoelectronic devices, including world‐record III‐V multi‐junction solar cells and photoelectrochemical (PEC) cells. The chemical and electronic properties of AlInP (001) depend on its surface reconstruction, which impacts its interaction with electrolytes in PEC applications and passivation layers. This study investigates AlInP (001) surface reconstructions using density functional theory and experimental methods. Phosphorus‐rich (P‐rich) and indium‐rich (In‐rich) AlInP surfaces are prepared with in situ monitoring of the process by reflection anisotropy (RA) spectroscopy and confirmed by low‐energy electron diffraction and photoemission spectroscopy. The experimental RA spectra closely match the theoretical predictions obtained by solving the Bethe–Salpeter equation. It is shown that missing hydrogen on P‐rich surfaces and formation of In–In 1D atomic chains on In‐rich surfaces introduce mid‐gap surface states that pin the Fermi level and induce band bending. Time‐resolved two‐photon photoemission measurements reveal ultrafast near‐surface electron dynamics for both P‐rich and In‐rich surfaces, demonstrating photoexcited electrons reaching the surface conduction band minimum and relaxing to mid‐gap surface states on about hundreds of fs. This work provides the most extensive AlInP surface analysis to date, allowing for more targeted surface and interface engineering, which is crucial for the optimization and design of III‐V heterostructures."}]},{"year":"2025","quality_controlled":"1","title":"Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror","date_created":"2025-02-14T08:13:10Z","publisher":"Royal Society of Chemistry (RSC)","abstract":[{"text":"We present a cost-effective self-assembly method to fabricate low-density dimer NPs in an NPoM architecture, using the M13 phage as a spacer layer. This will enable the development of dynamic plasmonic devices and advanced sensing applications.","lang":"eng"}],"publication":"Nanoscale Horizons","language":[{"iso":"eng"}],"citation":{"ama":"Devaraj V, Ruiz Alvarado IA, Lee J-M, et al. Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror. Nanoscale Horizons. 2025;10:537-548. doi:10.1039/d4nh00546e","chicago":"Devaraj, Vasanthan, Isaac Azahel Ruiz Alvarado, Jong-Min Lee, Jin-Woo Oh, Uwe Gerstmann, Wolf Gero Schmidt, and Thomas Zentgraf. “Self-Assembly of Isolated Plasmonic Dimers with Sub-5 Nm Gaps on a Metallic Mirror.” Nanoscale Horizons 10 (2025): 537–48. https://doi.org/10.1039/d4nh00546e.","ieee":"V. Devaraj et al., “Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror,” Nanoscale Horizons, vol. 10, pp. 537–548, 2025, doi: 10.1039/d4nh00546e.","bibtex":"@article{Devaraj_Ruiz Alvarado_Lee_Oh_Gerstmann_Schmidt_Zentgraf_2025, title={Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror}, volume={10}, DOI={10.1039/d4nh00546e}, journal={Nanoscale Horizons}, publisher={Royal Society of Chemistry (RSC)}, author={Devaraj, Vasanthan and Ruiz Alvarado, Isaac Azahel and Lee, Jong-Min and Oh, Jin-Woo and Gerstmann, Uwe and Schmidt, Wolf Gero and Zentgraf, Thomas}, year={2025}, pages={537–548} }","mla":"Devaraj, Vasanthan, et al. “Self-Assembly of Isolated Plasmonic Dimers with Sub-5 Nm Gaps on a Metallic Mirror.” Nanoscale Horizons, vol. 10, Royal Society of Chemistry (RSC), 2025, pp. 537–48, doi:10.1039/d4nh00546e.","short":"V. Devaraj, I.A. Ruiz Alvarado, J.-M. Lee, J.-W. Oh, U. Gerstmann, W.G. Schmidt, T. Zentgraf, Nanoscale Horizons 10 (2025) 537–548.","apa":"Devaraj, V., Ruiz Alvarado, I. A., Lee, J.-M., Oh, J.-W., Gerstmann, U., Schmidt, W. G., & Zentgraf, T. (2025). Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror. Nanoscale Horizons, 10, 537–548. https://doi.org/10.1039/d4nh00546e"},"page":"537-548","intvolume":" 10","publication_status":"published","publication_identifier":{"issn":["2055-6756","2055-6764"]},"doi":"10.1039/d4nh00546e","author":[{"first_name":"Vasanthan","last_name":"Devaraj","id":"103814","full_name":"Devaraj, Vasanthan"},{"first_name":"Isaac Azahel","id":"79462","full_name":"Ruiz Alvarado, Isaac Azahel","orcid":"0000-0002-4710-1170","last_name":"Ruiz Alvarado"},{"first_name":"Jong-Min","full_name":"Lee, Jong-Min","last_name":"Lee"},{"first_name":"Jin-Woo","last_name":"Oh","full_name":"Oh, Jin-Woo"},{"full_name":"Gerstmann, Uwe","id":"171","orcid":"0000-0002-4476-223X","last_name":"Gerstmann","first_name":"Uwe"},{"orcid":"0000-0002-2717-5076","last_name":"Schmidt","full_name":"Schmidt, Wolf Gero","id":"468","first_name":"Wolf Gero"},{"first_name":"Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","id":"30525","full_name":"Zentgraf, Thomas"}],"volume":10,"date_updated":"2025-07-09T14:04:39Z","status":"public","type":"journal_article","article_type":"original","user_id":"16199","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"35"},{"_id":"295"},{"_id":"170"},{"_id":"429"},{"_id":"27"}],"project":[{"grant_number":"231447078","_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"168","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","grant_number":"231447078"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"name":"Hochleistungsrechner Noctua in Paderborn","_id":"445","grant_number":"367360193"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"58642"},{"doi":"10.1103/physreva.111.032404","author":[{"full_name":"Barkhausen, Franziska","id":"63631","last_name":"Barkhausen","first_name":"Franziska"},{"first_name":"Laura","full_name":"Ares Santos, Laura","last_name":"Ares Santos"},{"first_name":"Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan","id":"27271"},{"first_name":"Jan","last_name":"Sperling","orcid":"0000-0002-5844-3205","id":"75127","full_name":"Sperling, Jan"}],"volume":111,"date_updated":"2025-09-12T10:42:16Z","citation":{"ama":"Barkhausen F, Ares Santos L, Schumacher S, Sperling J. Entanglement between dependent degrees of freedom: Quasiparticle correlations. Physical Review A. 2025;111(3). doi:10.1103/physreva.111.032404","chicago":"Barkhausen, Franziska, Laura Ares Santos, Stefan Schumacher, and Jan Sperling. “Entanglement between Dependent Degrees of Freedom: Quasiparticle Correlations.” Physical Review A 111, no. 3 (2025). https://doi.org/10.1103/physreva.111.032404.","ieee":"F. Barkhausen, L. Ares Santos, S. Schumacher, and J. Sperling, “Entanglement between dependent degrees of freedom: Quasiparticle correlations,” Physical Review A, vol. 111, no. 3, Art. no. 032404, 2025, doi: 10.1103/physreva.111.032404.","apa":"Barkhausen, F., Ares Santos, L., Schumacher, S., & Sperling, J. (2025). Entanglement between dependent degrees of freedom: Quasiparticle correlations. Physical Review A, 111(3), Article 032404. https://doi.org/10.1103/physreva.111.032404","short":"F. Barkhausen, L. Ares Santos, S. Schumacher, J. Sperling, Physical Review A 111 (2025).","mla":"Barkhausen, Franziska, et al. “Entanglement between Dependent Degrees of Freedom: Quasiparticle Correlations.” Physical Review A, vol. 111, no. 3, 032404, American Physical Society (APS), 2025, doi:10.1103/physreva.111.032404.","bibtex":"@article{Barkhausen_Ares Santos_Schumacher_Sperling_2025, title={Entanglement between dependent degrees of freedom: Quasiparticle correlations}, volume={111}, DOI={10.1103/physreva.111.032404}, number={3032404}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Barkhausen, Franziska and Ares Santos, Laura and Schumacher, Stefan and Sperling, Jan}, year={2025} }"},"intvolume":" 111","publication_status":"published","publication_identifier":{"issn":["2469-9926","2469-9934"]},"article_number":"032404","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"706"},{"_id":"35"},{"_id":"230"},{"_id":"623"},{"_id":"429"}],"project":[{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"61","name":"TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit Polaritonen in Mikrokavitäten"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"},{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"_id":"61245","status":"public","type":"journal_article","title":"Entanglement between dependent degrees of freedom: Quasiparticle correlations","date_created":"2025-09-12T10:37:34Z","publisher":"American Physical Society (APS)","year":"2025","issue":"3","language":[{"iso":"eng"}],"publication":"Physical Review A"},{"abstract":[{"text":"Abstract\r\n The time-dependent one-dimensional nonlinear Schrödinger equation (NLSE) is solved numerically by a hybrid pseudospectral-variational quantum algorithm that connects a pseudospectral step for the Hamiltonian term with a variational step for the nonlinear term. The Hamiltonian term is treated as an integrating factor by forward and backward Fourier transforms, which are here carried out classically. This split allows us to avoid higher-order time integration schemes, to apply a first-order explicit time stepping for the remaining nonlinear NLSE term in a variational algorithm block, and thus to avoid numerical instabilities. We demonstrate that the analytical solution is reproduced with a small root mean square error for a long time interval over which a nonlinear soliton propagates significantly forward in space while keeping its shape. We analyze the accuracy and complexity of the quantum algorithm, the expressibility of the ansatz circuit and compare it with classical approaches. Furthermore, we investigate the influence of algorithm parameters on the accuracy of the results, including the temporal step width and the depth of the quantum circuit.","lang":"eng"}],"status":"public","publication":"Scientific Reports","type":"journal_article","article_number":"23478","language":[{"iso":"eng"}],"_id":"61246","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"Hochleistungsrechner Noctua in Paderborn","_id":"445"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"35"},{"_id":"230"},{"_id":"27"}],"user_id":"16199","year":"2025","intvolume":" 15","citation":{"ama":"Köcher N, Rose H, Bharadwaj SS, Schumacher J, Schumacher S. Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm. Scientific Reports. 2025;15(1). doi:10.1038/s41598-025-05660-3","chicago":"Köcher, Nikolas, Hendrik Rose, Sachin S. Bharadwaj, Jörg Schumacher, and Stefan Schumacher. “Numerical Solution of Nonlinear Schrödinger Equation by a Hybrid Pseudospectral-Variational Quantum Algorithm.” Scientific Reports 15, no. 1 (2025). https://doi.org/10.1038/s41598-025-05660-3.","ieee":"N. Köcher, H. Rose, S. S. Bharadwaj, J. Schumacher, and S. Schumacher, “Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm,” Scientific Reports, vol. 15, no. 1, Art. no. 23478, 2025, doi: 10.1038/s41598-025-05660-3.","apa":"Köcher, N., Rose, H., Bharadwaj, S. S., Schumacher, J., & Schumacher, S. (2025). Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm. Scientific Reports, 15(1), Article 23478. https://doi.org/10.1038/s41598-025-05660-3","short":"N. Köcher, H. Rose, S.S. Bharadwaj, J. Schumacher, S. Schumacher, Scientific Reports 15 (2025).","bibtex":"@article{Köcher_Rose_Bharadwaj_Schumacher_Schumacher_2025, title={Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm}, volume={15}, DOI={10.1038/s41598-025-05660-3}, number={123478}, journal={Scientific Reports}, publisher={Springer Science and Business Media LLC}, author={Köcher, Nikolas and Rose, Hendrik and Bharadwaj, Sachin S. and Schumacher, Jörg and Schumacher, Stefan}, year={2025} }","mla":"Köcher, Nikolas, et al. “Numerical Solution of Nonlinear Schrödinger Equation by a Hybrid Pseudospectral-Variational Quantum Algorithm.” Scientific Reports, vol. 15, no. 1, 23478, Springer Science and Business Media LLC, 2025, doi:10.1038/s41598-025-05660-3."},"publication_identifier":{"issn":["2045-2322"]},"publication_status":"published","issue":"1","title":"Numerical solution of nonlinear Schrödinger equation by a hybrid pseudospectral-variational quantum algorithm","doi":"10.1038/s41598-025-05660-3","date_updated":"2025-09-12T10:57:22Z","publisher":"Springer Science and Business Media LLC","volume":15,"date_created":"2025-09-12T10:43:29Z","author":[{"last_name":"Köcher","full_name":"Köcher, Nikolas","id":"79191","first_name":"Nikolas"},{"orcid":"0000-0002-3079-5428","last_name":"Rose","id":"55958","full_name":"Rose, Hendrik","first_name":"Hendrik"},{"first_name":"Sachin S.","full_name":"Bharadwaj, Sachin S.","last_name":"Bharadwaj"},{"last_name":"Schumacher","full_name":"Schumacher, Jörg","first_name":"Jörg"},{"first_name":"Stefan","id":"27271","full_name":"Schumacher, Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher"}]},{"status":"public","type":"journal_article","publication":"Physical Review Applied","language":[{"iso":"eng"}],"article_number":"024029","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"230"},{"_id":"35"},{"_id":"27"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"61249","citation":{"ama":"Ai Q, Wingenbach J, Yang X, et al. Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice. Physical Review Applied. 2025;23(2). doi:10.1103/physrevapplied.23.024029","ieee":"Q. Ai et al., “Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice,” Physical Review Applied, vol. 23, no. 2, Art. no. 024029, 2025, doi: 10.1103/physrevapplied.23.024029.","chicago":"Ai, Qiang, Jan Wingenbach, Xinmiao Yang, Jing Wei, Zaharias Hatzopoulos, Pavlos G. Savvidis, Stefan Schumacher, Xuekai Ma, and Tingge Gao. “Optically and Remotely Controlling Localization of Exciton-Polariton Condensates in a Potential Lattice.” Physical Review Applied 23, no. 2 (2025). https://doi.org/10.1103/physrevapplied.23.024029.","apa":"Ai, Q., Wingenbach, J., Yang, X., Wei, J., Hatzopoulos, Z., Savvidis, P. G., Schumacher, S., Ma, X., & Gao, T. (2025). Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice. Physical Review Applied, 23(2), Article 024029. https://doi.org/10.1103/physrevapplied.23.024029","bibtex":"@article{Ai_Wingenbach_Yang_Wei_Hatzopoulos_Savvidis_Schumacher_Ma_Gao_2025, title={Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice}, volume={23}, DOI={10.1103/physrevapplied.23.024029}, number={2024029}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Ai, Qiang and Wingenbach, Jan and Yang, Xinmiao and Wei, Jing and Hatzopoulos, Zaharias and Savvidis, Pavlos G. and Schumacher, Stefan and Ma, Xuekai and Gao, Tingge}, year={2025} }","short":"Q. Ai, J. Wingenbach, X. Yang, J. Wei, Z. Hatzopoulos, P.G. Savvidis, S. Schumacher, X. Ma, T. Gao, Physical Review Applied 23 (2025).","mla":"Ai, Qiang, et al. “Optically and Remotely Controlling Localization of Exciton-Polariton Condensates in a Potential Lattice.” Physical Review Applied, vol. 23, no. 2, 024029, American Physical Society (APS), 2025, doi:10.1103/physrevapplied.23.024029."},"intvolume":" 23","year":"2025","issue":"2","publication_status":"published","publication_identifier":{"issn":["2331-7019"]},"doi":"10.1103/physrevapplied.23.024029","title":"Optically and remotely controlling localization of exciton-polariton condensates in a potential lattice","date_created":"2025-09-12T11:01:17Z","author":[{"first_name":"Qiang","last_name":"Ai","full_name":"Ai, Qiang"},{"full_name":"Wingenbach, Jan","id":"69187","last_name":"Wingenbach","first_name":"Jan"},{"last_name":"Yang","full_name":"Yang, Xinmiao","first_name":"Xinmiao"},{"first_name":"Jing","last_name":"Wei","full_name":"Wei, Jing"},{"last_name":"Hatzopoulos","full_name":"Hatzopoulos, Zaharias","first_name":"Zaharias"},{"full_name":"Savvidis, Pavlos G.","last_name":"Savvidis","first_name":"Pavlos G."},{"orcid":"0000-0003-4042-4951","last_name":"Schumacher","full_name":"Schumacher, Stefan","id":"27271","first_name":"Stefan"},{"last_name":"Ma","full_name":"Ma, Xuekai","id":"59416","first_name":"Xuekai"},{"last_name":"Gao","full_name":"Gao, Tingge","first_name":"Tingge"}],"volume":23,"publisher":"American Physical Society (APS)","date_updated":"2025-09-12T11:02:33Z"},{"title":"Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface","doi":"10.1002/admi.202500463","date_updated":"2025-09-18T11:06:59Z","publisher":"Wiley","date_created":"2025-09-18T11:03:16Z","author":[{"first_name":"Jonathan","last_name":"Diederich","full_name":"Diederich, Jonathan"},{"full_name":"Paszuk, Agnieszka","last_name":"Paszuk","first_name":"Agnieszka"},{"orcid":"0000-0002-4710-1170","last_name":"Ruiz Alvarado","id":"79462","full_name":"Ruiz Alvarado, Isaac Azahel","first_name":"Isaac Azahel"},{"first_name":"Marvin","full_name":"Krenz, Marvin","last_name":"Krenz"},{"first_name":"Mohammad Amin","last_name":"Zare Pour","full_name":"Zare Pour, Mohammad Amin"},{"first_name":"Diwakar Suresh","last_name":"Babu","full_name":"Babu, Diwakar Suresh"},{"first_name":"Jennifer","last_name":"Velazquez Rojas","full_name":"Velazquez Rojas, Jennifer"},{"last_name":"Höhn","full_name":"Höhn, Christian","first_name":"Christian"},{"first_name":"Yuying","full_name":"Gao, Yuying","last_name":"Gao"},{"last_name":"Schwarzburg","full_name":"Schwarzburg, Klaus","first_name":"Klaus"},{"first_name":"David","full_name":"Ostheimer, David","last_name":"Ostheimer"},{"full_name":"Eichberger, Rainer","last_name":"Eichberger","first_name":"Rainer"},{"full_name":"Schmidt, Wolf Gero","id":"468","orcid":"0000-0002-2717-5076","last_name":"Schmidt","first_name":"Wolf Gero"},{"full_name":"Hannappel, Thomas","last_name":"Hannappel","first_name":"Thomas"},{"first_name":"Roel van","full_name":"de Krol, Roel van","last_name":"de Krol"},{"last_name":"Friedrich","full_name":"Friedrich, Dennis","first_name":"Dennis"}],"volume":12,"year":"2025","citation":{"ama":"Diederich J, Paszuk A, Ruiz Alvarado IA, et al. Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface. Advanced Materials Interfaces. 2025;12(16). doi:10.1002/admi.202500463","ieee":"J. Diederich et al., “Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface,” Advanced Materials Interfaces, vol. 12, no. 16, Art. no. e00463, 2025, doi: 10.1002/admi.202500463.","chicago":"Diederich, Jonathan, Agnieszka Paszuk, Isaac Azahel Ruiz Alvarado, Marvin Krenz, Mohammad Amin Zare Pour, Diwakar Suresh Babu, Jennifer Velazquez Rojas, et al. “Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface.” Advanced Materials Interfaces 12, no. 16 (2025). https://doi.org/10.1002/admi.202500463.","mla":"Diederich, Jonathan, et al. “Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface.” Advanced Materials Interfaces, vol. 12, no. 16, e00463, Wiley, 2025, doi:10.1002/admi.202500463.","short":"J. Diederich, A. Paszuk, I.A. Ruiz Alvarado, M. Krenz, M.A. Zare Pour, D.S. Babu, J. Velazquez Rojas, C. Höhn, Y. Gao, K. Schwarzburg, D. Ostheimer, R. Eichberger, W.G. Schmidt, T. Hannappel, R. van de Krol, D. Friedrich, Advanced Materials Interfaces 12 (2025).","bibtex":"@article{Diederich_Paszuk_Ruiz Alvarado_Krenz_Zare Pour_Babu_Velazquez Rojas_Höhn_Gao_Schwarzburg_et al._2025, title={Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface}, volume={12}, DOI={10.1002/admi.202500463}, number={16e00463}, journal={Advanced Materials Interfaces}, publisher={Wiley}, author={Diederich, Jonathan and Paszuk, Agnieszka and Ruiz Alvarado, Isaac Azahel and Krenz, Marvin and Zare Pour, Mohammad Amin and Babu, Diwakar Suresh and Velazquez Rojas, Jennifer and Höhn, Christian and Gao, Yuying and Schwarzburg, Klaus and et al.}, year={2025} }","apa":"Diederich, J., Paszuk, A., Ruiz Alvarado, I. A., Krenz, M., Zare Pour, M. A., Babu, D. S., Velazquez Rojas, J., Höhn, C., Gao, Y., Schwarzburg, K., Ostheimer, D., Eichberger, R., Schmidt, W. G., Hannappel, T., de Krol, R. van, & Friedrich, D. (2025). Ultrafast Electron Dynamics at the Water‐Modified InP(100) Surface. Advanced Materials Interfaces, 12(16), Article e00463. https://doi.org/10.1002/admi.202500463"},"intvolume":" 12","publication_status":"published","publication_identifier":{"issn":["2196-7350","2196-7350"]},"issue":"16","article_number":"e00463","language":[{"iso":"eng"}],"project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"61351","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"35"},{"_id":"230"},{"_id":"27"},{"_id":"429"}],"abstract":[{"lang":"eng","text":"AbstractThe interaction of water molecules with semiconductor surfaces is relevant to various optoelectronic phenomena and physicochemical processes. Despite advances in fundamental understanding of water‐exposed surfaces, the detailed time‐ and energy‐resolved behavior of excited electrons remains largely unexplored. Here, the effects of water exposure on the near‐surface electron dynamics of phosphorus‐terminated p(2×2)/c(4×2)‐reconstructed indium phosphide (100) (P‐rich InP) are studied experimentally and matched to theoretical calculations. The P‐rich InP surface, consisting of H‐passivated P‐dimers, serves as a model for other P‐containing III‐V semiconductors such as gallium phosphide (GaP) or aluminum indium phosphide (AlInP). Electron dynamics near the surface are probed with femtosecond resolution using time‐resolved two‐photon photoemission (tr‐2PPE), a pump‐probe spectroscopic technique. Pulsed water exposure preserves electronic states and significantly increases lifetimes at the conduction band minimum (CBM). Density‐functional theory (DFT) calculations attribute these findings to suppression of surface vibrational modes in the top P‐layer by water exposure, reducing electronic transition probabilities of near‐band‐gap surface states. The results suggest that many near‐surface state lifetimes reported in ultra‐high vacuum may change significantly upon electrolyte exposure. These states may thus contribute more strongly to surface reactions than traditionally assumed. Demonstrating this effect for the technologically relevant P‐rich InP surface opens new opportunities in this underexplored area of surface electrochemistry."}],"status":"public","type":"journal_article","publication":"Advanced Materials Interfaces"},{"language":[{"iso":"eng"}],"abstract":[{"text":"First-principles calculations reveal how topological defects in semiconducting carbon nanotubes trap triplet excitons and enable single-photon emission at telecom wavelengths, offering new insights into their potential for photonic devices.","lang":"eng"}],"publication":"Nanoscale","title":"Topological defects in semiconducting carbon nanotubes as triplet exciton traps and single-photon emitters","date_created":"2025-09-18T11:23:25Z","publisher":"Royal Society of Chemistry (RSC)","year":"2025","issue":"11","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"35"},{"_id":"230"},{"_id":"27"},{"_id":"429"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"55","name":"TRR 142 - Project Area B"},{"_id":"168","name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"name":"TRR 142 - Subproject A11","_id":"166"}],"_id":"61356","status":"public","type":"journal_article","doi":"10.1039/d4nr03904a","author":[{"first_name":"Timur","last_name":"Biktagirov","full_name":"Biktagirov, Timur","id":"65612"},{"first_name":"Uwe","id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"last_name":"Schmidt","orcid":"0000-0002-2717-5076","full_name":"Schmidt, Wolf Gero","id":"468","first_name":"Wolf Gero"}],"volume":17,"date_updated":"2025-09-18T11:26:23Z","citation":{"ieee":"T. Biktagirov, U. Gerstmann, and W. G. Schmidt, “Topological defects in semiconducting carbon nanotubes as triplet exciton traps and single-photon emitters,” Nanoscale, vol. 17, no. 11, pp. 6884–6891, 2025, doi: 10.1039/d4nr03904a.","chicago":"Biktagirov, Timur, Uwe Gerstmann, and Wolf Gero Schmidt. “Topological Defects in Semiconducting Carbon Nanotubes as Triplet Exciton Traps and Single-Photon Emitters.” Nanoscale 17, no. 11 (2025): 6884–91. https://doi.org/10.1039/d4nr03904a.","ama":"Biktagirov T, Gerstmann U, Schmidt WG. Topological defects in semiconducting carbon nanotubes as triplet exciton traps and single-photon emitters. Nanoscale. 2025;17(11):6884-6891. doi:10.1039/d4nr03904a","bibtex":"@article{Biktagirov_Gerstmann_Schmidt_2025, title={Topological defects in semiconducting carbon nanotubes as triplet exciton traps and single-photon emitters}, volume={17}, DOI={10.1039/d4nr03904a}, number={11}, journal={Nanoscale}, publisher={Royal Society of Chemistry (RSC)}, author={Biktagirov, Timur and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2025}, pages={6884–6891} }","mla":"Biktagirov, Timur, et al. “Topological Defects in Semiconducting Carbon Nanotubes as Triplet Exciton Traps and Single-Photon Emitters.” Nanoscale, vol. 17, no. 11, Royal Society of Chemistry (RSC), 2025, pp. 6884–91, doi:10.1039/d4nr03904a.","short":"T. Biktagirov, U. Gerstmann, W.G. Schmidt, Nanoscale 17 (2025) 6884–6891.","apa":"Biktagirov, T., Gerstmann, U., & Schmidt, W. G. (2025). Topological defects in semiconducting carbon nanotubes as triplet exciton traps and single-photon emitters. Nanoscale, 17(11), 6884–6891. https://doi.org/10.1039/d4nr03904a"},"page":"6884-6891","intvolume":" 17","publication_status":"published","publication_identifier":{"issn":["2040-3364","2040-3372"]}},{"publisher":"Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften","date_updated":"2025-09-18T13:22:26Z","volume":9,"author":[{"first_name":"Denis A.","last_name":"Kopylov","full_name":"Kopylov, Denis A."},{"first_name":"Torsten","full_name":"Meier, Torsten","id":"344","last_name":"Meier","orcid":"0000-0001-8864-2072"},{"first_name":"Polina R.","last_name":"Sharapova","id":"60286","full_name":"Sharapova, Polina R."}],"date_created":"2025-02-05T12:57:37Z","title":"Theory of Multimode Squeezed Light Generation in Lossy Media","doi":"10.22331/q-2025-02-04-1621","publication_identifier":{"issn":["2521-327X"]},"publication_status":"published","year":"2025","intvolume":" 9","citation":{"apa":"Kopylov, D. A., Meier, T., & Sharapova, P. R. (2025). Theory of Multimode Squeezed Light Generation in Lossy Media. Quantum, 9, Article 1621. https://doi.org/10.22331/q-2025-02-04-1621","short":"D.A. Kopylov, T. Meier, P.R. Sharapova, Quantum 9 (2025).","bibtex":"@article{Kopylov_Meier_Sharapova_2025, title={Theory of Multimode Squeezed Light Generation in Lossy Media}, volume={9}, DOI={10.22331/q-2025-02-04-1621}, number={1621}, journal={Quantum}, publisher={Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften}, author={Kopylov, Denis A. and Meier, Torsten and Sharapova, Polina R.}, year={2025} }","mla":"Kopylov, Denis A., et al. “Theory of Multimode Squeezed Light Generation in Lossy Media.” Quantum, vol. 9, 1621, Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften, 2025, doi:10.22331/q-2025-02-04-1621.","ama":"Kopylov DA, Meier T, Sharapova PR. Theory of Multimode Squeezed Light Generation in Lossy Media. Quantum. 2025;9. doi:10.22331/q-2025-02-04-1621","chicago":"Kopylov, Denis A., Torsten Meier, and Polina R. Sharapova. “Theory of Multimode Squeezed Light Generation in Lossy Media.” Quantum 9 (2025). https://doi.org/10.22331/q-2025-02-04-1621.","ieee":"D. A. Kopylov, T. Meier, and P. R. Sharapova, “Theory of Multimode Squeezed Light Generation in Lossy Media,” Quantum, vol. 9, Art. no. 1621, 2025, doi: 10.22331/q-2025-02-04-1621."},"_id":"58519","project":[{"_id":"266","name":"PhoQC: PhoQC: Photonisches Quantencomputing"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"230"},{"_id":"623"},{"_id":"27"}],"user_id":"16199","article_number":"1621","language":[{"iso":"eng"}],"publication":"Quantum","type":"journal_article","abstract":[{"text":"A unified theoretical approach to describe the properties of multimode squeezed light generated in a lossy medium is presented. This approach is valid for Markovian environments and includes both a model of discrete losses based on the beamsplitter approach and a generalized continuous loss model based on the spatial Langevin equation. For an important class of Gaussian states, we derive master equations for the second-order correlation functions and illustrate their solution for both frequency-independent and frequency-dependent losses. Studying the mode structure, we demonstrate that in a lossy environment no broadband basis without quadrature correlations between the different broadband modes exists. Therefore, various techniques and strategies to introduce broadband modes can be considered. We show that the Mercer expansion and the Williamson-Euler decomposition do not provide modes in which the maximal squeezing contained in the system can be measured. In turn, we find a new broadband basis that maximizes squeezing in the lossy system and present an algorithm to construct it.","lang":"eng"}],"status":"public"},{"type":"journal_article","status":"public","user_id":"458","department":[{"_id":"296"},{"_id":"15"},{"_id":"170"},{"_id":"35"},{"_id":"230"}],"_id":"61279","file_date_updated":"2025-09-24T07:19:36Z","article_number":"4431","isi":"1","article_type":"review","publication_status":"published","publication_identifier":{"eissn":["1996-1944"]},"has_accepted_license":"1","citation":{"chicago":"Neugum, Michael, and Arno Schindlmayr. “Ab Initio Calculations of Spin Waves: A Review of Theoretical Approaches and Applications.” Materials 18, no. 18 (2025). https://doi.org/10.3390/ma18184431.","ieee":"M. Neugum and A. Schindlmayr, “Ab initio calculations of spin waves: A review of theoretical approaches and applications,” Materials, vol. 18, no. 18, Art. no. 4431, 2025, doi: 10.3390/ma18184431.","ama":"Neugum M, Schindlmayr A. Ab initio calculations of spin waves: A review of theoretical approaches and applications. Materials. 2025;18(18). doi:10.3390/ma18184431","apa":"Neugum, M., & Schindlmayr, A. (2025). Ab initio calculations of spin waves: A review of theoretical approaches and applications. Materials, 18(18), Article 4431. https://doi.org/10.3390/ma18184431","mla":"Neugum, Michael, and Arno Schindlmayr. “Ab Initio Calculations of Spin Waves: A Review of Theoretical Approaches and Applications.” Materials, vol. 18, no. 18, 4431, MDPI, 2025, doi:10.3390/ma18184431.","bibtex":"@article{Neugum_Schindlmayr_2025, title={Ab initio calculations of spin waves: A review of theoretical approaches and applications}, volume={18}, DOI={10.3390/ma18184431}, number={184431}, journal={Materials}, publisher={MDPI}, author={Neugum, Michael and Schindlmayr, Arno}, year={2025} }","short":"M. Neugum, A. Schindlmayr, Materials 18 (2025)."},"intvolume":" 18","author":[{"full_name":"Neugum, Michael","id":"80813","last_name":"Neugum","first_name":"Michael"},{"full_name":"Schindlmayr, Arno","id":"458","last_name":"Schindlmayr","orcid":"0000-0002-4855-071X","first_name":"Arno"}],"volume":18,"oa":"1","date_updated":"2025-10-10T07:31:23Z","doi":"10.3390/ma18184431","publication":"Materials","file":[{"relation":"main_file","date_created":"2025-09-24T07:19:36Z","date_updated":"2025-09-24T07:19:36Z","access_level":"open_access","file_id":"61422","description":"Creative Commons Attribution 4.0 International Public License (CC BY 4.0)","title":"Ab initio calculations of spin waves: A review of theoretical approaches and applications","content_type":"application/pdf","creator":"schindlm","file_name":"materials-18-04431.pdf","file_size":611341}],"license":"https://creativecommons.org/licenses/by/4.0/","abstract":[{"text":"Spin waves represent an important class of low-energy excitations in magnetic solids, which influence the thermodynamic properties and play a major role in technical applications, such as spintronics or magnetic data storage. Despite the enormous advances of ab initio simulations in materials science, quantitative calculations of spin-wave spectra still pose a significant challenge, because the collective nature of the spin dynamics requires an accurate treatment of the Coulomb interaction between the electrons. As a consequence, simple lattice models like the Heisenberg Hamiltonian are still widespread in practical investigations, but modern techniques like time-dependent density-functional theory or many-body perturbation theory also open a route to material-specific spin-wave calculations from first principles. Although both are in principle exact, actual implementations necessarily employ approximations for electronic exchange and correlation as well as additional numerical simplifications. In this review, we recapitulate the theoretical foundations of ab initio spin-wave calculations and analyze the common approximations that underlie present implementations. In addition, we survey the available results for spin-wave dispersions of various magnetic materials and compare the performance of different computational approaches. In this way, we provide an overview of the present state of the art and identify directions for further developments.","lang":"eng"}],"external_id":{"isi":["001580599300001"]},"language":[{"iso":"eng"}],"ddc":["530"],"issue":"18","quality_controlled":"1","year":"2025","date_created":"2025-09-15T16:14:59Z","publisher":"MDPI","title":"Ab initio calculations of spin waves: A review of theoretical approaches and applications"},{"external_id":{"isi":["001581270200001"]},"language":[{"iso":"eng"}],"ddc":["530"],"publication":"Dynamics","file":[{"date_updated":"2025-08-28T12:27:05Z","creator":"schindlm","date_created":"2025-08-28T12:23:26Z","title":"Generalized Miller formulae for quantum anharmonic oscillators","description":"Creative Commons Attribution 4.0 International Public License (CC BY 4.0)","file_size":375897,"access_level":"open_access","file_name":"dynamics-05-00034.pdf","file_id":"61056","content_type":"application/pdf","relation":"main_file"}],"abstract":[{"lang":"eng","text":"Miller's rule originated as an empirical relation between the nonlinear and linear optical coefficients of materials. It is now accepted as a useful tool for guiding experiments and computational materials discovery, but its theoretical foundation had long been limited to a derivation for the classical Lorentz model with a weak anharmonic perturbation. Recently, we developed a mathematical framework which enabled us to prove that Miller's rule is equally valid for quantum anharmonic oscillators, despite different dynamics due to zero-point fluctuations and further quantum-mechanical effects. However, our previous derivation applied only to one-dimensional oscillators and to the special case of second- and third-harmonic generation in a monochromatic electric field. Here we extend the proof to three-dimensional quantum anharmonic oscillators and also treat all orders of the nonlinear response to an arbitrary multi-frequency field. This makes the results applicable to a much larger range of physical systems and nonlinear optical processes. The obtained generalized Miller formulae rigorously express all tensor elements of the frequency-dependent nonlinear susceptibilities in terms of the linear susceptibility and thus allow a computationally inexpensive quantitative prediction of arbitrary parametric frequency-mixing processes from a small initial dataset."}],"date_created":"2025-08-20T09:46:13Z","publisher":"MDPI","title":"Generalized Miller formulae for quantum anharmonic oscillators","issue":"3","quality_controlled":"1","year":"2025","department":[{"_id":"296"},{"_id":"230"},{"_id":"15"},{"_id":"170"},{"_id":"35"}],"user_id":"458","_id":"60959","file_date_updated":"2025-08-28T12:27:05Z","isi":"1","article_number":"34","article_type":"original","type":"journal_article","status":"public","volume":5,"author":[{"first_name":"Maximilian Tim","id":"77895","full_name":"Meyer, Maximilian Tim","orcid":"0009-0003-4899-0920","last_name":"Meyer"},{"full_name":"Schindlmayr, Arno","id":"458","last_name":"Schindlmayr","orcid":"0000-0002-4855-071X","first_name":"Arno"}],"oa":"1","date_updated":"2025-10-10T07:29:36Z","doi":"10.3390/dynamics5030034","has_accepted_license":"1","publication_identifier":{"eissn":["2673-8716"]},"publication_status":"published","intvolume":" 5","citation":{"short":"M.T. Meyer, A. Schindlmayr, Dynamics 5 (2025).","mla":"Meyer, Maximilian Tim, and Arno Schindlmayr. “Generalized Miller Formulae for Quantum Anharmonic Oscillators.” Dynamics, vol. 5, no. 3, 34, MDPI, 2025, doi:10.3390/dynamics5030034.","bibtex":"@article{Meyer_Schindlmayr_2025, title={Generalized Miller formulae for quantum anharmonic oscillators}, volume={5}, DOI={10.3390/dynamics5030034}, number={334}, journal={Dynamics}, publisher={MDPI}, author={Meyer, Maximilian Tim and Schindlmayr, Arno}, year={2025} }","apa":"Meyer, M. T., & Schindlmayr, A. (2025). Generalized Miller formulae for quantum anharmonic oscillators. Dynamics, 5(3), Article 34. https://doi.org/10.3390/dynamics5030034","chicago":"Meyer, Maximilian Tim, and Arno Schindlmayr. “Generalized Miller Formulae for Quantum Anharmonic Oscillators.” Dynamics 5, no. 3 (2025). https://doi.org/10.3390/dynamics5030034.","ieee":"M. T. Meyer and A. Schindlmayr, “Generalized Miller formulae for quantum anharmonic oscillators,” Dynamics, vol. 5, no. 3, Art. no. 34, 2025, doi: 10.3390/dynamics5030034.","ama":"Meyer MT, Schindlmayr A. Generalized Miller formulae for quantum anharmonic oscillators. Dynamics. 2025;5(3). doi:10.3390/dynamics5030034"}},{"doi":"10.1002/lpor.202501874","title":"Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals","author":[{"first_name":"Ying","full_name":"Ji, Ying","last_name":"Ji"},{"first_name":"Xuekai","id":"59416","full_name":"Ma, Xuekai","last_name":"Ma"},{"first_name":"Han","full_name":"Huang, Han","last_name":"Huang"},{"first_name":"Yibo","last_name":"Deng","full_name":"Deng, Yibo"},{"first_name":"Pingyang","last_name":"Wang","full_name":"Wang, Pingyang"},{"first_name":"Teng","full_name":"Long, Teng","last_name":"Long"},{"first_name":"Yuan","last_name":"Li","full_name":"Li, Yuan"},{"first_name":"Ruiyang","last_name":"Zhao","full_name":"Zhao, Ruiyang"},{"first_name":"Yunfei","full_name":"Li, Yunfei","last_name":"Li"},{"last_name":"An","full_name":"An, Cunbin","first_name":"Cunbin"},{"orcid":"0000-0003-4042-4951","last_name":"Schumacher","full_name":"Schumacher, Stefan","id":"27271","first_name":"Stefan"},{"first_name":"Chunling","full_name":"Gu, Chunling","last_name":"Gu"},{"first_name":"Bo","last_name":"Liao","full_name":"Liao, Bo"},{"first_name":"Hongbing","full_name":"Fu, Hongbing","last_name":"Fu"},{"last_name":"Liao","full_name":"Liao, Qing","first_name":"Qing"}],"date_created":"2025-12-04T12:33:48Z","date_updated":"2025-12-04T12:34:45Z","publisher":"Wiley","citation":{"ama":"Ji Y, Ma X, Huang H, et al. Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals. Laser &amp; Photonics Reviews. Published online 2025. doi:10.1002/lpor.202501874","ieee":"Y. Ji et al., “Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals,” Laser &amp; Photonics Reviews, Art. no. e01874, 2025, doi: 10.1002/lpor.202501874.","chicago":"Ji, Ying, Xuekai Ma, Han Huang, Yibo Deng, Pingyang Wang, Teng Long, Yuan Li, et al. “Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals.” Laser &amp; Photonics Reviews, 2025. https://doi.org/10.1002/lpor.202501874.","short":"Y. Ji, X. Ma, H. Huang, Y. Deng, P. Wang, T. Long, Y. Li, R. Zhao, Y. Li, C. An, S. Schumacher, C. Gu, B. Liao, H. Fu, Q. Liao, Laser &amp; Photonics Reviews (2025).","bibtex":"@article{Ji_Ma_Huang_Deng_Wang_Long_Li_Zhao_Li_An_et al._2025, title={Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals}, DOI={10.1002/lpor.202501874}, number={e01874}, journal={Laser &amp; Photonics Reviews}, publisher={Wiley}, author={Ji, Ying and Ma, Xuekai and Huang, Han and Deng, Yibo and Wang, Pingyang and Long, Teng and Li, Yuan and Zhao, Ruiyang and Li, Yunfei and An, Cunbin and et al.}, year={2025} }","mla":"Ji, Ying, et al. “Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals.” Laser &amp; Photonics Reviews, e01874, Wiley, 2025, doi:10.1002/lpor.202501874.","apa":"Ji, Y., Ma, X., Huang, H., Deng, Y., Wang, P., Long, T., Li, Y., Zhao, R., Li, Y., An, C., Schumacher, S., Gu, C., Liao, B., Fu, H., & Liao, Q. (2025). Molecular Orientation‐Dependent Photonic Spin–Orbit Coupling in Organic Microcavities Filled with 2D Polymorphic Crystals. Laser &amp; Photonics Reviews, Article e01874. https://doi.org/10.1002/lpor.202501874"},"year":"2025","publication_identifier":{"issn":["1863-8880","1863-8899"]},"publication_status":"published","language":[{"iso":"eng"}],"article_number":"e01874","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"230"}],"user_id":"16199","_id":"62867","status":"public","abstract":[{"text":"ABSTRACT\r\n Effective manipulation of photonic spin–orbit coupling (SOC) in microcavities is of fundamental importance within topological photonics and applications. Anisotropic organic single‐crystalline materials can induce abundant SOC phenomenon due to their flexible tunability of molecular geometries, however, the intrinsic relationship between molecular geometries/orientations in 3D space and photonic SOC is lacking. In this study, we design two kinds of 2D organic polymorphs for the construction of organic microcavities to investigate the structure‐performance relationships. In two polymorphic microcavities, two distinctive photonic SOC phenomena are observed regardless of the in‐plane anisotropy of organic polymorphs. Theoretical analysis indicates that the photonic SOC strength is strongly influenced by the synergies between the crystal anisotropy and the tilted collective molecular transition dipole moment. Our results uncover the correlation mechanism between the structure of molecules and photonic SOC and open an avenue to engineer complex photonic SOC by use of organic microstructures towards the development of diverse integrated photonic devices.","lang":"eng"}],"publication":"Laser & Photonics Reviews","type":"journal_article"},{"doi":"10.1063/5.0287076","title":"Tuning polariton vortices in an asymmetric ring potential","date_created":"2025-12-04T12:25:12Z","author":[{"last_name":"Ai","full_name":"Ai, Qiang","first_name":"Qiang"},{"last_name":"Ma","full_name":"Ma, Xuekai","id":"59416","first_name":"Xuekai"},{"first_name":"Franziska","full_name":"Barkhausen, Franziska","id":"63631","last_name":"Barkhausen"},{"full_name":"Zhai, Xiaokun","last_name":"Zhai","first_name":"Xiaokun"},{"last_name":"Xing","full_name":"Xing, Chunzi","first_name":"Chunzi"},{"first_name":"Xinmiao","full_name":"Yang, Xinmiao","last_name":"Yang"},{"last_name":"Wang","full_name":"Wang, Peilin","first_name":"Peilin"},{"last_name":"Liu","full_name":"Liu, Tianyu","first_name":"Tianyu"},{"first_name":"Yong","full_name":"Zhang, Yong","last_name":"Zhang"},{"first_name":"Yazhou","last_name":"Gu","full_name":"Gu, Yazhou"},{"first_name":"Peigang","full_name":"Li, Peigang","last_name":"Li"},{"last_name":"Li","full_name":"Li, Zhitong","first_name":"Zhitong"},{"first_name":"Zacharias","full_name":"Hatzopoulos, Zacharias","last_name":"Hatzopoulos"},{"full_name":"Savvidis, Pavlos G.","last_name":"Savvidis","first_name":"Pavlos G."},{"orcid":"0000-0003-4042-4951","last_name":"Schumacher","full_name":"Schumacher, Stefan","id":"27271","first_name":"Stefan"},{"first_name":"Tingge","full_name":"Gao, Tingge","last_name":"Gao"}],"volume":127,"publisher":"AIP Publishing","date_updated":"2025-12-04T12:27:02Z","citation":{"ama":"Ai Q, Ma X, Barkhausen F, et al. Tuning polariton vortices in an asymmetric ring potential. Applied Physics Letters. 2025;127(12). doi:10.1063/5.0287076","chicago":"Ai, Qiang, Xuekai Ma, Franziska Barkhausen, Xiaokun Zhai, Chunzi Xing, Xinmiao Yang, Peilin Wang, et al. “Tuning Polariton Vortices in an Asymmetric Ring Potential.” Applied Physics Letters 127, no. 12 (2025). https://doi.org/10.1063/5.0287076.","ieee":"Q. Ai et al., “Tuning polariton vortices in an asymmetric ring potential,” Applied Physics Letters, vol. 127, no. 12, Art. no. 121103, 2025, doi: 10.1063/5.0287076.","apa":"Ai, Q., Ma, X., Barkhausen, F., Zhai, X., Xing, C., Yang, X., Wang, P., Liu, T., Zhang, Y., Gu, Y., Li, P., Li, Z., Hatzopoulos, Z., Savvidis, P. G., Schumacher, S., & Gao, T. (2025). Tuning polariton vortices in an asymmetric ring potential. Applied Physics Letters, 127(12), Article 121103. https://doi.org/10.1063/5.0287076","mla":"Ai, Qiang, et al. “Tuning Polariton Vortices in an Asymmetric Ring Potential.” Applied Physics Letters, vol. 127, no. 12, 121103, AIP Publishing, 2025, doi:10.1063/5.0287076.","bibtex":"@article{Ai_Ma_Barkhausen_Zhai_Xing_Yang_Wang_Liu_Zhang_Gu_et al._2025, title={Tuning polariton vortices in an asymmetric ring potential}, volume={127}, DOI={10.1063/5.0287076}, number={12121103}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Ai, Qiang and Ma, Xuekai and Barkhausen, Franziska and Zhai, Xiaokun and Xing, Chunzi and Yang, Xinmiao and Wang, Peilin and Liu, Tianyu and Zhang, Yong and Gu, Yazhou and et al.}, year={2025} }","short":"Q. Ai, X. Ma, F. Barkhausen, X. Zhai, C. Xing, X. Yang, P. Wang, T. Liu, Y. Zhang, Y. Gu, P. Li, Z. Li, Z. Hatzopoulos, P.G. Savvidis, S. Schumacher, T. Gao, Applied Physics Letters 127 (2025)."},"intvolume":" 127","year":"2025","issue":"12","publication_status":"published","publication_identifier":{"issn":["0003-6951","1077-3118"]},"language":[{"iso":"eng"}],"article_number":"121103","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"230"},{"_id":"27"}],"project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"62862","status":"public","abstract":[{"text":"Exciton polariton condensates are macroscopic coherent states in which topological excitations can be observed. In this work, we observe the excitation of the vortices and realize tuning the topological charge by manipulating the pumping configurations. Using a digital micromirror device, we constructed an annular pumping pattern where the inner and outer rings can be easily tuned. Both the number and the topological charge of the vortices can be changed by slightly tuning the inner ring position against the outer ring. The experimental results can be reproduced in theory by the Gross–Pitaevskii equation. Our work offers to generate and manipulate vortices in exciton polariton condensates using a straightforward optical method.","lang":"eng"}],"type":"journal_article","publication":"Applied Physics Letters"},{"doi":"10.1103/p357-vyq8","title":"Higher-order dark solitons and control dynamics in microcavity polariton condensates","date_created":"2025-12-04T12:28:52Z","author":[{"first_name":"Jinming","last_name":"Sun","full_name":"Sun, Jinming"},{"last_name":"Chen","full_name":"Chen, Manna","first_name":"Manna"},{"first_name":"Stefan","id":"27271","full_name":"Schumacher, Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher"},{"last_name":"Hu","full_name":"Hu, Wei","first_name":"Wei"},{"first_name":"Xuekai","full_name":"Ma, Xuekai","id":"59416","last_name":"Ma"}],"volume":112,"date_updated":"2025-12-04T12:29:37Z","publisher":"American Physical Society (APS)","citation":{"ama":"Sun J, Chen M, Schumacher S, Hu W, Ma X. Higher-order dark solitons and control dynamics in microcavity polariton condensates. Physical Review B. 2025;112(11). doi:10.1103/p357-vyq8","chicago":"Sun, Jinming, Manna Chen, Stefan Schumacher, Wei Hu, and Xuekai Ma. “Higher-Order Dark Solitons and Control Dynamics in Microcavity Polariton Condensates.” Physical Review B 112, no. 11 (2025). https://doi.org/10.1103/p357-vyq8.","ieee":"J. Sun, M. Chen, S. Schumacher, W. Hu, and X. Ma, “Higher-order dark solitons and control dynamics in microcavity polariton condensates,” Physical Review B, vol. 112, no. 11, Art. no. 115305, 2025, doi: 10.1103/p357-vyq8.","apa":"Sun, J., Chen, M., Schumacher, S., Hu, W., & Ma, X. (2025). Higher-order dark solitons and control dynamics in microcavity polariton condensates. Physical Review B, 112(11), Article 115305. https://doi.org/10.1103/p357-vyq8","short":"J. Sun, M. Chen, S. Schumacher, W. Hu, X. Ma, Physical Review B 112 (2025).","mla":"Sun, Jinming, et al. “Higher-Order Dark Solitons and Control Dynamics in Microcavity Polariton Condensates.” Physical Review B, vol. 112, no. 11, 115305, American Physical Society (APS), 2025, doi:10.1103/p357-vyq8.","bibtex":"@article{Sun_Chen_Schumacher_Hu_Ma_2025, title={Higher-order dark solitons and control dynamics in microcavity polariton condensates}, volume={112}, DOI={10.1103/p357-vyq8}, number={11115305}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Sun, Jinming and Chen, Manna and Schumacher, Stefan and Hu, Wei and Ma, Xuekai}, year={2025} }"},"intvolume":" 112","year":"2025","issue":"11","publication_status":"published","publication_identifier":{"issn":["2469-9950","2469-9969"]},"language":[{"iso":"eng"}],"article_number":"115305","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"230"}],"_id":"62865","status":"public","type":"journal_article","publication":"Physical Review B"},{"publisher":"American Physical Society (APS)","date_updated":"2025-12-05T09:37:10Z","date_created":"2025-12-05T09:36:31Z","author":[{"full_name":"Ali, Usman","last_name":"Ali","first_name":"Usman"},{"full_name":"Holthaus, Martin","last_name":"Holthaus","first_name":"Martin"},{"last_name":"Meier","orcid":"0000-0001-8864-2072","id":"344","full_name":"Meier, Torsten","first_name":"Torsten"}],"volume":7,"title":"Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling","doi":"10.1103/physrevresearch.7.013141","publication_status":"published","publication_identifier":{"issn":["2643-1564"]},"issue":"1","year":"2025","citation":{"bibtex":"@article{Ali_Holthaus_Meier_2025, title={Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling}, volume={7}, DOI={10.1103/physrevresearch.7.013141}, number={1013141}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Ali, Usman and Holthaus, Martin and Meier, Torsten}, year={2025} }","mla":"Ali, Usman, et al. “Wave Packet Dynamics in Parabolic Optical Lattices: From Bloch Oscillations to Long-Range Dynamical Tunneling.” Physical Review Research, vol. 7, no. 1, 013141, American Physical Society (APS), 2025, doi:10.1103/physrevresearch.7.013141.","short":"U. Ali, M. Holthaus, T. Meier, Physical Review Research 7 (2025).","apa":"Ali, U., Holthaus, M., & Meier, T. (2025). Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling. Physical Review Research, 7(1), Article 013141. https://doi.org/10.1103/physrevresearch.7.013141","chicago":"Ali, Usman, Martin Holthaus, and Torsten Meier. “Wave Packet Dynamics in Parabolic Optical Lattices: From Bloch Oscillations to Long-Range Dynamical Tunneling.” Physical Review Research 7, no. 1 (2025). https://doi.org/10.1103/physrevresearch.7.013141.","ieee":"U. Ali, M. Holthaus, and T. Meier, “Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling,” Physical Review Research, vol. 7, no. 1, Art. no. 013141, 2025, doi: 10.1103/physrevresearch.7.013141.","ama":"Ali U, Holthaus M, Meier T. Wave packet dynamics in parabolic optical lattices: From Bloch oscillations to long-range dynamical tunneling. Physical Review Research. 2025;7(1). doi:10.1103/physrevresearch.7.013141"},"intvolume":" 7","_id":"62912","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"35"}],"article_number":"013141","language":[{"iso":"eng"}],"type":"journal_article","publication":"Physical Review Research","abstract":[{"lang":"eng","text":"We investigate the dynamics of wave packets in a parabolic optical lattice formed by combining an optical lattice with a global parabolic trap. Our study examines the phase space representation of the system's eigenstates by comparing them to the classical phase space of a pendulum, to which the system effectively maps. The analysis reveals that quantum states can exhibit mixed dynamics by straddling the separatrix. A key finding is that the dynamics around the separatrix enables the controlled creation of highly nonclassical states, distinguishing them from the classical oscillatory or rotational dynamics of the pendulum. By considering a finite momentum of the initial wave packet, we demonstrate various dynamical regimes. Furthermore, a slight energy mismatch between nearly degenerate states localized at opposite turning points of the trap potential results in controlled long-range dynamical tunneling. These results can be interpreted as quantum beating between a clockwise rotating and a counterclockwise rotating pendulum."}],"status":"public"},{"article_number":"033122","language":[{"iso":"eng"}],"_id":"62911","project":[{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"}],"department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"288"},{"_id":"230"},{"_id":"623"},{"_id":"429"},{"_id":"35"}],"user_id":"16199","abstract":[{"text":"In this paper, we theoretically study the spectral and temporal properties of pulsed spontaneous parametric down-conversion (SPDC) generated in lossy waveguides. Our theoretical approach is based on the formalism of Gaussian states and the Langevin equation, which is elaborated for weak parametric down-conversion and photon-number-unresolved click detection. Using the example of frequency-degenerate type-II SPDC generated under the pump-idler group-velocity-matching condition, we show how the joint-spectral intensity, mode structure, normalized second-order correlation function, and Hong-Ou-Mandel interference pattern depend on internal losses of the SPDC process. We found that the joint-spectral intensity is almost insensitive to internal losses, while the second-order correlation function shows a strong dependence on them, being different for the signal and idler beams in the presence of internal losses. Based on the sensitivity of the normalized second-order correlation function, we show how its measurement can be used to experimentally determine internal losses.","lang":"eng"}],"status":"public","publication":"Physical Review Research","type":"journal_article","title":"Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation","doi":"10.1103/zp72-7qwl","publisher":"American Physical Society (APS)","date_updated":"2025-12-05T09:55:22Z","volume":7,"date_created":"2025-12-05T09:33:36Z","author":[{"last_name":"Kopylov","full_name":"Kopylov, Denis A.","first_name":"Denis A."},{"last_name":"Stefszky","id":"42777","full_name":"Stefszky, Michael","first_name":"Michael"},{"first_name":"Torsten","id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072"},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"},{"first_name":"Polina R.","id":"60286","full_name":"Sharapova, Polina R.","last_name":"Sharapova"}],"year":"2025","intvolume":" 7","citation":{"apa":"Kopylov, D. A., Stefszky, M., Meier, T., Silberhorn, C., & Sharapova, P. R. (2025). Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation. Physical Review Research, 7(3), Article 033122. https://doi.org/10.1103/zp72-7qwl","short":"D.A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, P.R. Sharapova, Physical Review Research 7 (2025).","bibtex":"@article{Kopylov_Stefszky_Meier_Silberhorn_Sharapova_2025, title={Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation}, volume={7}, DOI={10.1103/zp72-7qwl}, number={3033122}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Kopylov, Denis A. and Stefszky, Michael and Meier, Torsten and Silberhorn, Christine and Sharapova, Polina R.}, year={2025} }","mla":"Kopylov, Denis A., et al. “Spectral and Temporal Properties of Type-II Parametric down-Conversion: The Impact of Losses during State Generation.” Physical Review Research, vol. 7, no. 3, 033122, American Physical Society (APS), 2025, doi:10.1103/zp72-7qwl.","ama":"Kopylov DA, Stefszky M, Meier T, Silberhorn C, Sharapova PR. Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation. Physical Review Research. 2025;7(3). doi:10.1103/zp72-7qwl","ieee":"D. A. Kopylov, M. Stefszky, T. Meier, C. Silberhorn, and P. R. Sharapova, “Spectral and temporal properties of type-II parametric down-conversion: The impact of losses during state generation,” Physical Review Research, vol. 7, no. 3, Art. no. 033122, 2025, doi: 10.1103/zp72-7qwl.","chicago":"Kopylov, Denis A., Michael Stefszky, Torsten Meier, Christine Silberhorn, and Polina R. Sharapova. “Spectral and Temporal Properties of Type-II Parametric down-Conversion: The Impact of Losses during State Generation.” Physical Review Research 7, no. 3 (2025). https://doi.org/10.1103/zp72-7qwl."},"publication_identifier":{"issn":["2643-1564"]},"publication_status":"published","issue":"3"},{"doi":"10.1109/cdc56724.2024.10886589","title":"Accelerating the analysis of optical quantum systems using the Koopman operator","date_created":"2025-12-05T09:37:58Z","author":[{"last_name":"Hunstig","full_name":"Hunstig, Anna","id":"73659","first_name":"Anna"},{"first_name":"Sebastian","full_name":"Peitz, Sebastian","id":"47427","last_name":"Peitz","orcid":"0000-0002-3389-793X"},{"last_name":"Rose","orcid":"0000-0002-3079-5428","full_name":"Rose, Hendrik","id":"55958","first_name":"Hendrik"},{"first_name":"Torsten","orcid":"0000-0001-8864-2072","last_name":"Meier","full_name":"Meier, Torsten","id":"344"}],"publisher":"IEEE","date_updated":"2025-12-05T09:40:24Z","citation":{"chicago":"Hunstig, Anna, Sebastian Peitz, Hendrik Rose, and Torsten Meier. “Accelerating the Analysis of Optical Quantum Systems Using the Koopman Operator.” In 2024 IEEE 63rd Conference on Decision and Control (CDC). IEEE, 2025. https://doi.org/10.1109/cdc56724.2024.10886589.","ieee":"A. Hunstig, S. Peitz, H. Rose, and T. Meier, “Accelerating the analysis of optical quantum systems using the Koopman operator,” 2025, doi: 10.1109/cdc56724.2024.10886589.","ama":"Hunstig A, Peitz S, Rose H, Meier T. Accelerating the analysis of optical quantum systems using the Koopman operator. In: 2024 IEEE 63rd Conference on Decision and Control (CDC). IEEE; 2025. doi:10.1109/cdc56724.2024.10886589","apa":"Hunstig, A., Peitz, S., Rose, H., & Meier, T. (2025). Accelerating the analysis of optical quantum systems using the Koopman operator. 2024 IEEE 63rd Conference on Decision and Control (CDC). https://doi.org/10.1109/cdc56724.2024.10886589","short":"A. Hunstig, S. Peitz, H. Rose, T. Meier, in: 2024 IEEE 63rd Conference on Decision and Control (CDC), IEEE, 2025.","mla":"Hunstig, Anna, et al. “Accelerating the Analysis of Optical Quantum Systems Using the Koopman Operator.” 2024 IEEE 63rd Conference on Decision and Control (CDC), IEEE, 2025, doi:10.1109/cdc56724.2024.10886589.","bibtex":"@inproceedings{Hunstig_Peitz_Rose_Meier_2025, title={Accelerating the analysis of optical quantum systems using the Koopman operator}, DOI={10.1109/cdc56724.2024.10886589}, booktitle={2024 IEEE 63rd Conference on Decision and Control (CDC)}, publisher={IEEE}, author={Hunstig, Anna and Peitz, Sebastian and Rose, Hendrik and Meier, Torsten}, year={2025} }"},"year":"2025","publication_status":"published","language":[{"iso":"eng"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"623"},{"_id":"35"}],"user_id":"16199","_id":"62913","project":[{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"status":"public","publication":"2024 IEEE 63rd Conference on Decision and Control (CDC)","type":"conference"}]