[{"year":"2023","citation":{"apa":"Geromel, R., Rennerich, R., Zentgraf, T., & Kitzerow, H.-S. (2023). Geometric-phase metalens to be used for tunable optical tweezers in microfluidics. Liquid Crystals, 50(7–10), 1193–1203. https://doi.org/10.1080/02678292.2023.2171146","mla":"Geromel, René, et al. “Geometric-Phase Metalens to Be Used for Tunable Optical Tweezers in Microfluidics.” Liquid Crystals, vol. 50, no. 7–10, Taylor & Francis, 2023, pp. 1193–203, doi:10.1080/02678292.2023.2171146.","bibtex":"@article{Geromel_Rennerich_Zentgraf_Kitzerow_2023, title={Geometric-phase metalens to be used for tunable optical tweezers in microfluidics}, volume={50}, DOI={10.1080/02678292.2023.2171146}, number={7–10}, journal={Liquid Crystals}, publisher={Taylor & Francis}, author={Geromel, René and Rennerich, Roman and Zentgraf, Thomas and Kitzerow, Heinz-Siegfried}, year={2023}, pages={1193–1203} }","short":"R. Geromel, R. Rennerich, T. Zentgraf, H.-S. Kitzerow, Liquid Crystals 50 (2023) 1193–1203.","ieee":"R. Geromel, R. Rennerich, T. Zentgraf, and H.-S. Kitzerow, “Geometric-phase metalens to be used for tunable optical tweezers in microfluidics,” Liquid Crystals, vol. 50, no. 7–10, pp. 1193–1203, 2023, doi: 10.1080/02678292.2023.2171146.","chicago":"Geromel, René, Roman Rennerich, Thomas Zentgraf, and Heinz-Siegfried Kitzerow. “Geometric-Phase Metalens to Be Used for Tunable Optical Tweezers in Microfluidics.” Liquid Crystals 50, no. 7–10 (2023): 1193–1203. https://doi.org/10.1080/02678292.2023.2171146.","ama":"Geromel R, Rennerich R, Zentgraf T, Kitzerow H-S. Geometric-phase metalens to be used for tunable optical tweezers in microfluidics. Liquid Crystals. 2023;50(7-10):1193-1203. doi:10.1080/02678292.2023.2171146"},"intvolume":" 50","page":"1193-1203","quality_controlled":"1","issue":"7-10","title":"Geometric-phase metalens to be used for tunable optical tweezers in microfluidics","doi":"10.1080/02678292.2023.2171146","publisher":"Taylor & Francis","date_updated":"2025-05-23T05:52:46Z","author":[{"first_name":"René","last_name":"Geromel","full_name":"Geromel, René"},{"first_name":"Roman","last_name":"Rennerich","full_name":"Rennerich, Roman"},{"full_name":"Zentgraf, Thomas","id":"30525","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","first_name":"Thomas"},{"first_name":"Heinz-Siegfried","full_name":"Kitzerow, Heinz-Siegfried","id":"254","last_name":"Kitzerow"}],"date_created":"2023-01-27T12:42:16Z","volume":50,"abstract":[{"lang":"eng","text":"Geometric-phase dielectric meta-lenses made of silicon with high numerical aperture and short focal lengths are fabricated and characterised. For circularly polarised light, the same meta-lens can act as a converging or diverging lens, depending on the handedness of the circular polarisation. This effect enables application for optical tweezers that trap or release µm-size polymer beads floating in a microfluidic channel on demand. An electrically addressable polarisation converter based on liquid crystals may be used to switch between the two states of polarisation, at which the light transmitted through the meta-lens is focused (trapping) or defocussed (releasing), respectively."}],"status":"public","type":"journal_article","publication":"Liquid Crystals","language":[{"iso":"eng"}],"project":[{"_id":"53","name":"TRR 142: TRR 142","grant_number":"231447078"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"grant_number":"231447078","name":"TRR 142 - B09: TRR 142 - Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen (B09*)","_id":"170"}],"_id":"40513","user_id":"30525","department":[{"_id":"313"},{"_id":"230"},{"_id":"638"},{"_id":"15"},{"_id":"623"}]},{"doi":"10.1103/physrevresearch.5.043158","main_file_link":[{"url":"https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.5.043158","open_access":"1"}],"title":"Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers","volume":5,"author":[{"last_name":"Scharwald","orcid":"0009-0007-5654-5412","full_name":"Scharwald, Dennis","id":"55907","first_name":"Dennis"},{"first_name":"Torsten","id":"344","full_name":"Meier, Torsten","orcid":"0000-0001-8864-2072","last_name":"Meier"},{"first_name":"Polina","last_name":"Sharapova","full_name":"Sharapova, Polina"}],"date_created":"2024-08-30T04:48:05Z","date_updated":"2026-02-01T13:21:22Z","publisher":"American Physical Society (APS)","oa":"1","intvolume":" 5","citation":{"ieee":"D. Scharwald, T. Meier, and P. Sharapova, “Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers,” Physical Review Research, vol. 5, no. 4, Art. no. 043158, 2023, doi: 10.1103/physrevresearch.5.043158.","chicago":"Scharwald, Dennis, Torsten Meier, and Polina Sharapova. “Phase Sensitivity of Spatially Broadband High-Gain SU(1,1) Interferometers.” Physical Review Research 5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043158.","ama":"Scharwald D, Meier T, Sharapova P. Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers. Physical Review Research. 2023;5(4). doi:10.1103/physrevresearch.5.043158","apa":"Scharwald, D., Meier, T., & Sharapova, P. (2023). Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers. Physical Review Research, 5(4), Article 043158. https://doi.org/10.1103/physrevresearch.5.043158","bibtex":"@article{Scharwald_Meier_Sharapova_2023, title={Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers}, volume={5}, DOI={10.1103/physrevresearch.5.043158}, number={4043158}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Scharwald, Dennis and Meier, Torsten and Sharapova, Polina}, year={2023} }","mla":"Scharwald, Dennis, et al. “Phase Sensitivity of Spatially Broadband High-Gain SU(1,1) Interferometers.” Physical Review Research, vol. 5, no. 4, 043158, American Physical Society (APS), 2023, doi:10.1103/physrevresearch.5.043158.","short":"D. Scharwald, T. Meier, P. Sharapova, Physical Review Research 5 (2023)."},"year":"2023","issue":"4","publication_identifier":{"issn":["2643-1564"]},"publication_status":"published","language":[{"iso":"eng"}],"article_number":"043158","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"230"},{"_id":"429"},{"_id":"623"},{"_id":"27"}],"user_id":"55907","_id":"55900","project":[{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"_id":"174","name":"TRR 142 - C10: TRR 142 - Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse (C10*)"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"status":"public","publication":"Physical Review Research","type":"journal_article"},{"title":"On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs","publisher":"Wiley","date_created":"2025-09-12T11:11:56Z","year":"2023","issue":"1","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"AbstractThe biexciton‐exciton emission cascade commonly used in quantum‐dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work, it focuses on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishability. It achieves this goal by selectively reducing the biexciton lifetime with an optical resonator. It demonstrates that a suitably tailored circular Bragg reflector fulfills the requirements of sufficient selective Purcell enhancement of biexciton emission paired with spectrally broad photon extraction and twofold degenerate optical modes. The in‐depth theoretical study combines (i) the optimization of realistic photonic structures solving Maxwell's equations from which model parameters are extracted as input for (ii) microscopic simulations of quantum‐dot cavity excitation dynamics with full access to photon properties. It reports non‐trivial dependencies on system parameters and use the predictive power of the combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values, here specifically for the telecom C‐band at 1550 nm."}],"publication":"Advanced Quantum Technologies","doi":"10.1002/qute.202300142","date_updated":"2025-09-12T11:16:12Z","volume":7,"author":[{"first_name":"David","last_name":"Bauch","full_name":"Bauch, David"},{"last_name":"Siebert","full_name":"Siebert, Dustin","first_name":"Dustin"},{"full_name":"Jöns, Klaus D.","id":"85353","last_name":"Jöns","first_name":"Klaus D."},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"},{"first_name":"Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","id":"27271","full_name":"Schumacher, Stefan"}],"intvolume":" 7","citation":{"ama":"Bauch D, Siebert D, Jöns KD, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies. 2023;7(1). doi:10.1002/qute.202300142","chicago":"Bauch, David, Dustin Siebert, Klaus D. Jöns, Jens Förstner, and Stefan Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” Advanced Quantum Technologies 7, no. 1 (2023). https://doi.org/10.1002/qute.202300142.","ieee":"D. Bauch, D. Siebert, K. D. Jöns, J. Förstner, and S. Schumacher, “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” Advanced Quantum Technologies, vol. 7, no. 1, Art. no. 2300142, 2023, doi: 10.1002/qute.202300142.","short":"D. Bauch, D. Siebert, K.D. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies 7 (2023).","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, volume={7}, DOI={10.1002/qute.202300142}, number={12300142}, journal={Advanced Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus D. and Förstner, Jens and Schumacher, Stefan}, year={2023} }","mla":"Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” Advanced Quantum Technologies, vol. 7, no. 1, 2300142, Wiley, 2023, doi:10.1002/qute.202300142.","apa":"Bauch, D., Siebert, D., Jöns, K. D., Förstner, J., & Schumacher, S. (2023). On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies, 7(1), Article 2300142. https://doi.org/10.1002/qute.202300142"},"publication_identifier":{"issn":["2511-9044","2511-9044"]},"publication_status":"published","article_number":"2300142","_id":"61252","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"55","name":"TRR 142 - Project Area B"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142; TP B06: Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems","_id":"167"},{"_id":"173","name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen"},{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"642"},{"_id":"61"},{"_id":"230"},{"_id":"35"},{"_id":"34"},{"_id":"429"},{"_id":"27"},{"_id":"623"}],"user_id":"16199","status":"public","type":"journal_article"},{"status":"public","abstract":[{"text":"We study the interaction of gray tracking and DC ionic conductivity in Potassium Titanyl Phosphate (KTiOPO4, KTP) and present a novel way to reduce conductivity via a potassium nitrate treatment improving the device quality.","lang":"eng"}],"type":"conference","publication":"CLEO 2023","language":[{"iso":"eng"}],"user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"288"},{"_id":"230"},{"_id":"429"},{"_id":"35"},{"_id":"27"}],"project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_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":"168","name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"_id":"166","name":"TRR 142 - Subproject A11"}],"_id":"61362","citation":{"ama":"Eigner C, Padberg L, Quiring V, et al. Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance. In: CLEO 2023. Optica Publishing Group; 2023. doi:10.1364/cleo_at.2023.jw2a.57","ieee":"C. Eigner et al., “Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance,” 2023, doi: 10.1364/cleo_at.2023.jw2a.57.","chicago":"Eigner, Christof, Laura Padberg, Viktor Quiring, Adriana Bocchini, Matteo Santandrea, Uwe Gerstmann, Wolf Gero Schmidt, and Christine Silberhorn. “Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance.” In CLEO 2023. Optica Publishing Group, 2023. https://doi.org/10.1364/cleo_at.2023.jw2a.57.","apa":"Eigner, C., Padberg, L., Quiring, V., Bocchini, A., Santandrea, M., Gerstmann, U., Schmidt, W. G., & Silberhorn, C. (2023). Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance. CLEO 2023. https://doi.org/10.1364/cleo_at.2023.jw2a.57","short":"C. Eigner, L. Padberg, V. Quiring, A. Bocchini, M. Santandrea, U. Gerstmann, W.G. Schmidt, C. Silberhorn, in: CLEO 2023, Optica Publishing Group, 2023.","mla":"Eigner, Christof, et al. “Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance.” CLEO 2023, Optica Publishing Group, 2023, doi:10.1364/cleo_at.2023.jw2a.57.","bibtex":"@inproceedings{Eigner_Padberg_Quiring_Bocchini_Santandrea_Gerstmann_Schmidt_Silberhorn_2023, title={Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance}, DOI={10.1364/cleo_at.2023.jw2a.57}, booktitle={CLEO 2023}, publisher={Optica Publishing Group}, author={Eigner, Christof and Padberg, Laura and Quiring, Viktor and Bocchini, Adriana and Santandrea, Matteo and Gerstmann, Uwe and Schmidt, Wolf Gero and Silberhorn, Christine}, year={2023} }"},"year":"2023","publication_status":"published","doi":"10.1364/cleo_at.2023.jw2a.57","title":"Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance","author":[{"last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","full_name":"Eigner, Christof","id":"13244","first_name":"Christof"},{"first_name":"Laura","full_name":"Padberg, Laura","id":"40300","last_name":"Padberg"},{"first_name":"Viktor","full_name":"Quiring, Viktor","last_name":"Quiring"},{"last_name":"Bocchini","orcid":"0000-0002-2134-3075","id":"58349","full_name":"Bocchini, Adriana","first_name":"Adriana"},{"last_name":"Santandrea","orcid":"0000-0001-5718-358X","full_name":"Santandrea, Matteo","id":"55095","first_name":"Matteo"},{"first_name":"Uwe","full_name":"Gerstmann, Uwe","id":"171","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"first_name":"Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076","full_name":"Schmidt, Wolf Gero","id":"468"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"}],"date_created":"2025-09-18T12:06:19Z","date_updated":"2025-09-18T12:08:56Z","publisher":"Optica Publishing Group"},{"type":"journal_article","status":"public","department":[{"_id":"15"},{"_id":"170"},{"_id":"705"},{"_id":"297"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"user_id":"16199","_id":"36416","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"},{"name":"TRR 142 - A4: TRR 142 - Subproject A4","_id":"61"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"}],"publication_identifier":{"issn":["0002-7863","1520-5126"]},"publication_status":"published","page":"1557-1563","intvolume":" 145","citation":{"ama":"De J, Ma X, Yin F, et al. Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates. Journal of the American Chemical Society (JACS). 2023;145(3):1557-1563. doi:10.1021/jacs.2c07557","ieee":"J. De et al., “Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates,” Journal of the American Chemical Society (JACS), vol. 145, no. 3, pp. 1557–1563, 2023, doi: 10.1021/jacs.2c07557.","chicago":"De, Jianbo, Xuekai Ma, Fan Yin, Jiahuan Ren, Jiannian Yao, Stefan Schumacher, Qing Liao, Hongbing Fu, Guillaume Malpuech, and Dmitry Solnyshkov. “Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates.” Journal of the American Chemical Society (JACS) 145, no. 3 (2023): 1557–63. https://doi.org/10.1021/jacs.2c07557.","mla":"De, Jianbo, et al. “Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates.” Journal of the American Chemical Society (JACS), vol. 145, no. 3, American Chemical Society (ACS), 2023, pp. 1557–63, doi:10.1021/jacs.2c07557.","bibtex":"@article{De_Ma_Yin_Ren_Yao_Schumacher_Liao_Fu_Malpuech_Solnyshkov_2023, title={Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates}, volume={145}, DOI={10.1021/jacs.2c07557}, number={3}, journal={Journal of the American Chemical Society (JACS)}, publisher={American Chemical Society (ACS)}, author={De, Jianbo and Ma, Xuekai and Yin, Fan and Ren, Jiahuan and Yao, Jiannian and Schumacher, Stefan and Liao, Qing and Fu, Hongbing and Malpuech, Guillaume and Solnyshkov, Dmitry}, year={2023}, pages={1557–1563} }","short":"J. De, X. Ma, F. Yin, J. Ren, J. Yao, S. Schumacher, Q. Liao, H. Fu, G. Malpuech, D. Solnyshkov, Journal of the American Chemical Society (JACS) 145 (2023) 1557–1563.","apa":"De, J., Ma, X., Yin, F., Ren, J., Yao, J., Schumacher, S., Liao, Q., Fu, H., Malpuech, G., & Solnyshkov, D. (2023). Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates. Journal of the American Chemical Society (JACS), 145(3), 1557–1563. https://doi.org/10.1021/jacs.2c07557"},"volume":145,"author":[{"last_name":"De","full_name":"De, Jianbo","first_name":"Jianbo"},{"id":"59416","full_name":"Ma, Xuekai","last_name":"Ma","first_name":"Xuekai"},{"first_name":"Fan","full_name":"Yin, Fan","last_name":"Yin"},{"first_name":"Jiahuan","full_name":"Ren, Jiahuan","last_name":"Ren"},{"first_name":"Jiannian","full_name":"Yao, Jiannian","last_name":"Yao"},{"first_name":"Stefan","id":"27271","full_name":"Schumacher, Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher"},{"first_name":"Qing","full_name":"Liao, Qing","last_name":"Liao"},{"full_name":"Fu, Hongbing","last_name":"Fu","first_name":"Hongbing"},{"last_name":"Malpuech","full_name":"Malpuech, Guillaume","first_name":"Guillaume"},{"full_name":"Solnyshkov, Dmitry","last_name":"Solnyshkov","first_name":"Dmitry"}],"date_updated":"2025-12-05T13:50:32Z","doi":"10.1021/jacs.2c07557","publication":"Journal of the American Chemical Society (JACS)","language":[{"iso":"eng"}],"keyword":["Colloid and Surface Chemistry","Biochemistry","General Chemistry","Catalysis"],"issue":"3","year":"2023","date_created":"2023-01-12T12:07:52Z","publisher":"American Chemical Society (ACS)","title":"Room-Temperature Electrical Field-Enhanced Ultrafast Switch in Organic Microcavity Polariton Condensates"},{"intvolume":" 30","citation":{"ieee":"A. Widhalm, C. Golla, N. Weber, P. Mackwitz, A. Zrenner, and C. Meier, “Electric-field-induced second harmonic generation in silicon dioxide,” Optics Express, vol. 30, no. 4, Art. no. 4867, 2022, doi: 10.1364/oe.443489.","chicago":"Widhalm, Alex, Christian Golla, Nils Weber, Peter Mackwitz, Artur Zrenner, and Cedrik Meier. “Electric-Field-Induced Second Harmonic Generation in Silicon Dioxide.” Optics Express 30, no. 4 (2022). https://doi.org/10.1364/oe.443489.","ama":"Widhalm A, Golla C, Weber N, Mackwitz P, Zrenner A, Meier C. Electric-field-induced second harmonic generation in silicon dioxide. Optics Express. 2022;30(4). doi:10.1364/oe.443489","apa":"Widhalm, A., Golla, C., Weber, N., Mackwitz, P., Zrenner, A., & Meier, C. (2022). Electric-field-induced second harmonic generation in silicon dioxide. Optics Express, 30(4), Article 4867. https://doi.org/10.1364/oe.443489","short":"A. Widhalm, C. Golla, N. Weber, P. Mackwitz, A. Zrenner, C. Meier, Optics Express 30 (2022).","mla":"Widhalm, Alex, et al. “Electric-Field-Induced Second Harmonic Generation in Silicon Dioxide.” Optics Express, vol. 30, no. 4, 4867, The Optical Society, 2022, doi:10.1364/oe.443489.","bibtex":"@article{Widhalm_Golla_Weber_Mackwitz_Zrenner_Meier_2022, title={Electric-field-induced second harmonic generation in silicon dioxide}, volume={30}, DOI={10.1364/oe.443489}, number={44867}, journal={Optics Express}, publisher={The Optical Society}, author={Widhalm, Alex and Golla, Christian and Weber, Nils and Mackwitz, Peter and Zrenner, Artur and Meier, Cedrik}, year={2022} }"},"year":"2022","issue":"4","publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","doi":"10.1364/oe.443489","title":"Electric-field-induced second harmonic generation in silicon dioxide","volume":30,"date_created":"2022-02-01T15:36:34Z","author":[{"first_name":"Alex","full_name":"Widhalm, Alex","last_name":"Widhalm"},{"last_name":"Golla","full_name":"Golla, Christian","first_name":"Christian"},{"first_name":"Nils","last_name":"Weber","full_name":"Weber, Nils"},{"last_name":"Mackwitz","full_name":"Mackwitz, Peter","first_name":"Peter"},{"first_name":"Artur","id":"606","full_name":"Zrenner, Artur","last_name":"Zrenner","orcid":"0000-0002-5190-0944"},{"first_name":"Cedrik","id":"20798","full_name":"Meier, Cedrik","last_name":"Meier","orcid":"https://orcid.org/0000-0002-3787-3572"}],"publisher":"The Optical Society","date_updated":"2022-02-07T14:20:13Z","status":"public","publication":"Optics Express","type":"journal_article","language":[{"iso":"eng"}],"keyword":["Atomic and Molecular Physics","and Optics"],"article_number":"4867","department":[{"_id":"15"}],"user_id":"20798","_id":"29716","project":[{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"}]},{"date_created":"2022-03-21T10:12:58Z","publisher":"SPIE","title":"Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber","year":"2022","language":[{"iso":"eng"}],"keyword":["tet_topic_waveguide"],"ddc":["530"],"publication":"Complex Light and Optical Forces XVI","file":[{"date_updated":"2022-03-22T18:03:50Z","creator":"fossie","date_created":"2022-03-22T18:03:50Z","file_size":2015899,"file_id":"30444","file_name":"2022-03 Hammer - SPIE Photonics West 2022 - Resonant evanescent excitation of OAM modes in a high-contrast circular (official version).pdf","access_level":"open_access","content_type":"application/pdf","relation":"main_file"}],"abstract":[{"text":"Resonant evanescent coupling can be utilized to selectively excite orbital angular momentum (OAM) modes of high angular order supported by a thin circular dielectric rod. Our 2.5-D hybrid-analytical coupled mode model combines the vectorial fields associated with the fundamental TE- and TM-modes of a standard silicon photonics slab waveguide, propagating at oblique angles with respect to the rod axis, and the hybrid modes supported by the rod. One observes an efficient resonant interaction in cases where the common axial wavenumber of the waves in the slab matches the propagation constant of one or more modes of the rod. For certain modes of high angular order, the incident wave is able to transfer its directionality to the field in the fiber, exciting effectively only one of a pair of degenerate OAM modes","lang":"eng"}],"author":[{"orcid":"0000-0002-6331-9348","last_name":"Hammer","id":"48077","full_name":"Hammer, Manfred","first_name":"Manfred"},{"first_name":"Lena","last_name":"Ebers","id":"40428","full_name":"Ebers, Lena"},{"first_name":"Jens","id":"158","full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner"}],"oa":"1","date_updated":"2022-03-22T18:04:20Z","doi":"10.1117/12.2612179","has_accepted_license":"1","publication_status":"published","page":"120170F","citation":{"apa":"Hammer, M., Ebers, L., & Förstner, J. (2022). Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber. In D. L. Andrews, E. J. Galvez, & H. Rubinsztein-Dunlop (Eds.), Complex Light and Optical Forces XVI (p. 120170F). SPIE. https://doi.org/10.1117/12.2612179","short":"M. Hammer, L. Ebers, J. Förstner, in: D.L. Andrews, E.J. Galvez, H. Rubinsztein-Dunlop (Eds.), Complex Light and Optical Forces XVI, SPIE, 2022, p. 120170F.","mla":"Hammer, Manfred, et al. “Resonant Evanescent Excitation of OAM Modes in a High-Contrast Circular Step-Index Fiber.” Complex Light and Optical Forces XVI, edited by David L. Andrews et al., SPIE, 2022, p. 120170F, doi:10.1117/12.2612179.","bibtex":"@inproceedings{Hammer_Ebers_Förstner_2022, title={Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber}, DOI={10.1117/12.2612179}, booktitle={Complex Light and Optical Forces XVI}, publisher={SPIE}, author={Hammer, Manfred and Ebers, Lena and Förstner, Jens}, editor={Andrews, David L. and Galvez, Enrique J. and Rubinsztein-Dunlop, Halina}, year={2022}, pages={120170F} }","ieee":"M. Hammer, L. Ebers, and J. Förstner, “Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber,” in Complex Light and Optical Forces XVI, 2022, p. 120170F, doi: 10.1117/12.2612179.","chicago":"Hammer, Manfred, Lena Ebers, and Jens Förstner. “Resonant Evanescent Excitation of OAM Modes in a High-Contrast Circular Step-Index Fiber.” In Complex Light and Optical Forces XVI, edited by David L. Andrews, Enrique J. Galvez, and Halina Rubinsztein-Dunlop, 120170F. SPIE, 2022. https://doi.org/10.1117/12.2612179.","ama":"Hammer M, Ebers L, Förstner J. Resonant evanescent excitation of OAM modes in a high-contrast circular step-index fiber. In: Andrews DL, Galvez EJ, Rubinsztein-Dunlop H, eds. Complex Light and Optical Forces XVI. SPIE; 2022:120170F. doi:10.1117/12.2612179"},"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","_id":"30387","project":[{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"}],"file_date_updated":"2022-03-22T18:03:50Z","type":"conference","status":"public","editor":[{"first_name":"David L.","full_name":"Andrews, David L.","last_name":"Andrews"},{"first_name":"Enrique J.","full_name":"Galvez, Enrique J.","last_name":"Galvez"},{"first_name":"Halina","last_name":"Rubinsztein-Dunlop","full_name":"Rubinsztein-Dunlop, Halina"}]},{"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1002/advs.202104508"}],"doi":"10.1002/advs.202104508","author":[{"full_name":"Reineke Matsudo, Bernhard","last_name":"Reineke Matsudo","first_name":"Bernhard"},{"first_name":"Basudeb","full_name":"Sain, Basudeb","last_name":"Sain"},{"first_name":"Luca","full_name":"Carletti, Luca","last_name":"Carletti"},{"full_name":"Zhang, Xue","last_name":"Zhang","first_name":"Xue"},{"last_name":"Gao","full_name":"Gao, Wenlong","first_name":"Wenlong"},{"full_name":"Angelis, Costantino","last_name":"Angelis","first_name":"Costantino"},{"full_name":"Huang, Lingling","last_name":"Huang","first_name":"Lingling"},{"full_name":"Zentgraf, Thomas","id":"30525","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","first_name":"Thomas"}],"volume":9,"date_updated":"2022-04-25T13:04:44Z","oa":"1","citation":{"ama":"Reineke Matsudo B, Sain B, Carletti L, et al. Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces. Advanced Science. 2022;9(12). doi:10.1002/advs.202104508","ieee":"B. Reineke Matsudo et al., “Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces,” Advanced Science, vol. 9, no. 12, Art. no. 2104508, 2022, doi: 10.1002/advs.202104508.","chicago":"Reineke Matsudo, Bernhard, Basudeb Sain, Luca Carletti, Xue Zhang, Wenlong Gao, Costantino Angelis, Lingling Huang, and Thomas Zentgraf. “Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces.” Advanced Science 9, no. 12 (2022). https://doi.org/10.1002/advs.202104508.","short":"B. Reineke Matsudo, B. Sain, L. Carletti, X. Zhang, W. Gao, C. Angelis, L. Huang, T. Zentgraf, Advanced Science 9 (2022).","bibtex":"@article{Reineke Matsudo_Sain_Carletti_Zhang_Gao_Angelis_Huang_Zentgraf_2022, title={Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces}, volume={9}, DOI={10.1002/advs.202104508}, number={122104508}, journal={Advanced Science}, publisher={Wiley}, author={Reineke Matsudo, Bernhard and Sain, Basudeb and Carletti, Luca and Zhang, Xue and Gao, Wenlong and Angelis, Costantino and Huang, Lingling and Zentgraf, Thomas}, year={2022} }","mla":"Reineke Matsudo, Bernhard, et al. “Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces.” Advanced Science, vol. 9, no. 12, 2104508, Wiley, 2022, doi:10.1002/advs.202104508.","apa":"Reineke Matsudo, B., Sain, B., Carletti, L., Zhang, X., Gao, W., Angelis, C., Huang, L., & Zentgraf, T. (2022). Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces. Advanced Science, 9(12), Article 2104508. https://doi.org/10.1002/advs.202104508"},"intvolume":" 9","publication_status":"published","publication_identifier":{"issn":["2198-3844","2198-3844"]},"has_accepted_license":"1","file_date_updated":"2022-03-03T07:23:15Z","article_type":"original","article_number":"2104508","user_id":"30525","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"}],"project":[{"name":"TRR 142: TRR 142","_id":"53"},{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"name":"TRR 142 - C5: TRR 142 - Subproject C5","_id":"75"}],"_id":"29902","status":"public","type":"journal_article","title":"Efficient Frequency Conversion with Geometric Phase Control in Optical Metasurfaces","date_created":"2022-02-21T08:09:02Z","publisher":"Wiley","year":"2022","issue":"12","quality_controlled":"1","language":[{"iso":"eng"}],"ddc":["530"],"keyword":["General Physics and Astronomy","General Engineering","Biochemistry","Genetics and Molecular Biology (miscellaneous)","General Materials Science","General Chemical Engineering","Medicine (miscellaneous)"],"file":[{"date_created":"2022-03-03T07:23:15Z","creator":"zentgraf","date_updated":"2022-03-03T07:23:15Z","file_name":"2022_ACSPhotonics_NonlinearChiral_Arxiv.pdf","access_level":"closed","file_id":"30196","file_size":1001422,"content_type":"application/pdf","relation":"main_file","success":1}],"publication":"Advanced Science"},{"publisher":"Wiley","date_created":"2024-06-24T05:59:11Z","title":"Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons","issue":"2","year":"2022","language":[{"iso":"eng"}],"publication":"physica status solidi (b)","abstract":[{"lang":"eng","text":"The third‐order susceptibility of lithium niobate (LiNbO3) is calculated within a Berry‐phase formulation of the dynamical polarization based on the electronic structure obtained within density‐functional theory (DFT). Maximum values of the order of m V are calculated for photon energies between 1.2 and 2 eV, i.e., in the lower half of the optical bandgap of lithium niobate. Both free and bound electron (bi)polarons are found to lead to a remarkable enhancement of the third‐order susceptibility for photon energies below 1 eV."}],"date_updated":"2024-06-24T06:02:58Z","volume":260,"author":[{"full_name":"Kozub, Agnieszka L.","last_name":"Kozub","first_name":"Agnieszka L."},{"first_name":"Uwe","last_name":"Gerstmann","orcid":"0000-0002-4476-223X","id":"171","full_name":"Gerstmann, Uwe"},{"first_name":"Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076","full_name":"Schmidt, Wolf Gero","id":"468"}],"doi":"10.1002/pssb.202200453","publication_identifier":{"issn":["0370-1972","1521-3951"]},"publication_status":"published","intvolume":" 260","citation":{"ieee":"A. L. Kozub, U. Gerstmann, and W. G. Schmidt, “Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons,” physica status solidi (b), vol. 260, no. 2, 2022, doi: 10.1002/pssb.202200453.","chicago":"Kozub, Agnieszka L., Uwe Gerstmann, and Wolf Gero Schmidt. “Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons.” Physica Status Solidi (b) 260, no. 2 (2022). https://doi.org/10.1002/pssb.202200453.","ama":"Kozub AL, Gerstmann U, Schmidt WG. Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons. physica status solidi (b). 2022;260(2). doi:10.1002/pssb.202200453","bibtex":"@article{Kozub_Gerstmann_Schmidt_2022, title={Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons}, volume={260}, DOI={10.1002/pssb.202200453}, number={2}, journal={physica status solidi (b)}, publisher={Wiley}, author={Kozub, Agnieszka L. and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2022} }","mla":"Kozub, Agnieszka L., et al. “Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons.” Physica Status Solidi (b), vol. 260, no. 2, Wiley, 2022, doi:10.1002/pssb.202200453.","short":"A.L. Kozub, U. Gerstmann, W.G. Schmidt, Physica Status Solidi (b) 260 (2022).","apa":"Kozub, A. L., Gerstmann, U., & Schmidt, W. G. (2022). Third‐Order Susceptibility of Lithium Niobate: Influence of Polarons and Bipolarons. Physica Status Solidi (b), 260(2). https://doi.org/10.1002/pssb.202200453"},"_id":"54849","project":[{"grant_number":"231447078","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"230"},{"_id":"429"},{"_id":"27"}],"user_id":"16199","type":"journal_article","status":"public"},{"issue":"1","year":"2022","date_created":"2021-12-08T07:14:39Z","title":"Optimization of optical waveguide antennas for directive emission of light","publication":"Journal of the Optical Society of America B","abstract":[{"text":"Optical traveling wave antennas offer unique opportunities to control and selectively guide light into a specific direction, which renders them excellent candidates for optical communication and sensing. These applications require state-of-the-art engineering to reach optimized functionalities such as high directivity and radiation efficiency, low sidelobe levels, broadband and tunable capabilities, and compact design. In this work, we report on the numerical optimization of the directivity of optical traveling wave antennas made from low-loss dielectric materials using full-wave numerical simulations in conjunction with the particle swarm optimization algorithm. The antennas are composed of a reflector and a director deposited on a glass substrate, and an emitter placed in the feed gap between them serves as an internal source of excitation. In particular, we analyze antennas with rectangular- and horn-shaped directors made of either hafnium dioxide or silicon. The optimized antennas produce highly directional emissions due to the presence of two dominant guided TE modes in the director in addition to leaky modes. These guided modes dominate the far-field emission pattern and govern the direction of the main lobe emission, which predominately originates from the end facet of the director. Our work also provides a comprehensive analysis of the modes, radiation patterns, parametric influences, and bandwidths of the antennas, which highlights their robust nature.","lang":"eng"}],"file":[{"relation":"main_file","embargo_to":"open_access","content_type":"application/pdf","file_size":14029741,"access_level":"local","file_id":"28417","file_name":"2021-12 Farheen - JOSA B - Optimization of optical nanoantennas.pdf","embargo":"2022-12-08","date_updated":"2021-12-08T08:26:57Z","date_created":"2021-12-08T08:26:57Z","creator":"fossie"},{"file_name":"2021-12 Farheen - JOSA B - Optimization of optical nanoantennas SUPPLEMENTARY MATERIAL.pdf","access_level":"open_access","file_id":"28418","file_size":655495,"date_created":"2021-12-08T08:29:49Z","creator":"fossie","date_updated":"2021-12-08T08:29:49Z","relation":"supplementary_material","content_type":"application/pdf"}],"keyword":["tet_topic_opticalantenna"],"ddc":["530"],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["0740-3224","1520-8540"]},"has_accepted_license":"1","publication_status":"published","intvolume":" 39","page":"83","citation":{"mla":"Farheen, Henna, et al. “Optimization of Optical Waveguide Antennas for Directive Emission of Light.” Journal of the Optical Society of America B, vol. 39, no. 1, 2022, p. 83, doi:10.1364/josab.438514.","bibtex":"@article{Farheen_Leuteritz_Linden_Myroshnychenko_Förstner_2022, title={Optimization of optical waveguide antennas for directive emission of light}, volume={39}, DOI={10.1364/josab.438514}, number={1}, journal={Journal of the Optical Society of America B}, author={Farheen, Henna and Leuteritz, Till and Linden, Stefan and Myroshnychenko, Viktor and Förstner, Jens}, year={2022}, pages={83} }","short":"H. Farheen, T. Leuteritz, S. Linden, V. Myroshnychenko, J. Förstner, Journal of the Optical Society of America B 39 (2022) 83.","apa":"Farheen, H., Leuteritz, T., Linden, S., Myroshnychenko, V., & Förstner, J. (2022). Optimization of optical waveguide antennas for directive emission of light. Journal of the Optical Society of America B, 39(1), 83. https://doi.org/10.1364/josab.438514","ama":"Farheen H, Leuteritz T, Linden S, Myroshnychenko V, Förstner J. Optimization of optical waveguide antennas for directive emission of light. Journal of the Optical Society of America B. 2022;39(1):83. doi:10.1364/josab.438514","ieee":"H. Farheen, T. Leuteritz, S. Linden, V. Myroshnychenko, and J. Förstner, “Optimization of optical waveguide antennas for directive emission of light,” Journal of the Optical Society of America B, vol. 39, no. 1, p. 83, 2022, doi: 10.1364/josab.438514.","chicago":"Farheen, Henna, Till Leuteritz, Stefan Linden, Viktor Myroshnychenko, and Jens Förstner. “Optimization of Optical Waveguide Antennas for Directive Emission of Light.” Journal of the Optical Society of America B 39, no. 1 (2022): 83. https://doi.org/10.1364/josab.438514."},"oa":"1","date_updated":"2024-07-22T07:45:12Z","volume":39,"author":[{"last_name":"Farheen","orcid":"0000-0001-7730-3489","full_name":"Farheen, Henna","id":"53444","first_name":"Henna"},{"full_name":"Leuteritz, Till","last_name":"Leuteritz","first_name":"Till"},{"last_name":"Linden","full_name":"Linden, Stefan","first_name":"Stefan"},{"first_name":"Viktor","last_name":"Myroshnychenko","full_name":"Myroshnychenko, Viktor","id":"46371"},{"full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"}],"doi":"10.1364/josab.438514","type":"journal_article","status":"public","_id":"28413","project":[{"grant_number":"231447078","_id":"53","name":"TRR 142"},{"name":"TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - Subproject C5","_id":"75","grant_number":"231447078"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","file_date_updated":"2021-12-08T08:29:49Z"},{"doi":"10.1103/physrevb.106.205408","volume":106,"author":[{"first_name":"S.","full_name":"Grisard, S.","last_name":"Grisard"},{"first_name":"Hendrik","orcid":"0000-0002-3079-5428","last_name":"Rose","full_name":"Rose, Hendrik","id":"55958"},{"first_name":"A. V.","full_name":"Trifonov, A. V.","last_name":"Trifonov"},{"last_name":"Reichhardt","full_name":"Reichhardt, R.","first_name":"R."},{"first_name":"D. E.","full_name":"Reiter, D. E.","last_name":"Reiter"},{"first_name":"Matthias","id":"138","full_name":"Reichelt, Matthias","last_name":"Reichelt"},{"last_name":"Schneider","full_name":"Schneider, C.","first_name":"C."},{"first_name":"M.","full_name":"Kamp, M.","last_name":"Kamp"},{"first_name":"S.","last_name":"Höfling","full_name":"Höfling, S."},{"full_name":"Bayer, M.","last_name":"Bayer","first_name":"M."},{"first_name":"Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","id":"344","full_name":"Meier, Torsten"},{"full_name":"Akimov, I. A.","last_name":"Akimov","first_name":"I. A."}],"date_updated":"2023-04-20T14:53:19Z","intvolume":" 106","citation":{"bibtex":"@article{Grisard_Rose_Trifonov_Reichhardt_Reiter_Reichelt_Schneider_Kamp_Höfling_Bayer_et al._2022, title={Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses}, volume={106}, DOI={10.1103/physrevb.106.205408}, number={20205408}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Grisard, S. and Rose, Hendrik and Trifonov, A. V. and Reichhardt, R. and Reiter, D. E. and Reichelt, Matthias and Schneider, C. and Kamp, M. and Höfling, S. and Bayer, M. and et al.}, year={2022} }","mla":"Grisard, S., et al. “Multiple Rabi Rotations of Trions in InGaAs Quantum Dots Observed by Photon Echo Spectroscopy with Spatially Shaped Laser Pulses.” Physical Review B, vol. 106, no. 20, 205408, American Physical Society (APS), 2022, doi:10.1103/physrevb.106.205408.","short":"S. Grisard, H. Rose, A.V. Trifonov, R. Reichhardt, D.E. Reiter, M. Reichelt, C. Schneider, M. Kamp, S. Höfling, M. Bayer, T. Meier, I.A. Akimov, Physical Review B 106 (2022).","apa":"Grisard, S., Rose, H., Trifonov, A. V., Reichhardt, R., Reiter, D. E., Reichelt, M., Schneider, C., Kamp, M., Höfling, S., Bayer, M., Meier, T., & Akimov, I. A. (2022). Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses. Physical Review B, 106(20), Article 205408. https://doi.org/10.1103/physrevb.106.205408","ama":"Grisard S, Rose H, Trifonov AV, et al. Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses. Physical Review B. 2022;106(20). doi:10.1103/physrevb.106.205408","ieee":"S. Grisard et al., “Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses,” Physical Review B, vol. 106, no. 20, Art. no. 205408, 2022, doi: 10.1103/physrevb.106.205408.","chicago":"Grisard, S., Hendrik Rose, A. V. Trifonov, R. Reichhardt, D. E. Reiter, Matthias Reichelt, C. Schneider, et al. “Multiple Rabi Rotations of Trions in InGaAs Quantum Dots Observed by Photon Echo Spectroscopy with Spatially Shaped Laser Pulses.” Physical Review B 106, no. 20 (2022). https://doi.org/10.1103/physrevb.106.205408."},"publication_identifier":{"issn":["2469-9950","2469-9969"]},"publication_status":"published","article_number":"205408","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"623"},{"_id":"35"},{"_id":"429"}],"user_id":"16199","_id":"37319","project":[{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"status":"public","type":"journal_article","title":"Multiple Rabi rotations of trions in InGaAs quantum dots observed by photon echo spectroscopy with spatially shaped laser pulses","date_created":"2023-01-18T10:58:12Z","publisher":"American Physical Society (APS)","year":"2022","issue":"20","language":[{"iso":"eng"}],"publication":"Physical Review B"},{"type":"conference","publication":"Ultrafast Phenomena and Nanophotonics XXVI","editor":[{"last_name":"Betz","full_name":"Betz, Markus","first_name":"Markus"},{"first_name":"Abdulhakem Y.","last_name":"Elezzabi","full_name":"Elezzabi, Abdulhakem Y."}],"status":"public","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - A7: TRR 142 - Subproject A7","_id":"64"}],"_id":"37329","series_title":"SPIE Proceedings","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"language":[{"iso":"eng"}],"publication_status":"published","year":"2022","citation":{"mla":"Trautmann, Alexander, et al. “Microscopic Simulations of High Harmonic Generation from Semiconductors.” Ultrafast Phenomena and Nanophotonics XXVI, edited by Markus Betz and Abdulhakem Y. Elezzabi, vol. 11999, 2022, doi:10.1117/12.2607447.","short":"A. Trautmann, R. Zuo, G. Wang, W.-R. Hannes, S. Yang, L.H. Thong, C. Ngo, J. Steiner, M. Ciappina, M. Reichelt, H.T. Duc, X. Song, W. Yang, T. Meier, in: M. Betz, A.Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXVI, 2022.","bibtex":"@inproceedings{Trautmann_Zuo_Wang_Hannes_Yang_Thong_Ngo_Steiner_Ciappina_Reichelt_et al._2022, series={SPIE Proceedings}, title={Microscopic simulations of high harmonic generation from semiconductors}, volume={11999}, DOI={10.1117/12.2607447}, booktitle={Ultrafast Phenomena and Nanophotonics XXVI}, author={Trautmann, Alexander and Zuo, Ruixin and Wang, Guifang and Hannes, Wolf-Rüdiger and Yang, Shidong and Thong, Le Huu and Ngo, Cong and Steiner, Johannes and Ciappina, Marcelo and Reichelt, Matthias and et al.}, editor={Betz, Markus and Elezzabi, Abdulhakem Y.}, year={2022}, collection={SPIE Proceedings} }","apa":"Trautmann, A., Zuo, R., Wang, G., Hannes, W.-R., Yang, S., Thong, L. H., Ngo, C., Steiner, J., Ciappina, M., Reichelt, M., Duc, H. T., Song, X., Yang, W., & Meier, T. (2022). Microscopic simulations of high harmonic generation from semiconductors. In M. Betz & A. Y. Elezzabi (Eds.), Ultrafast Phenomena and Nanophotonics XXVI (Vol. 11999). https://doi.org/10.1117/12.2607447","ieee":"A. Trautmann et al., “Microscopic simulations of high harmonic generation from semiconductors,” in Ultrafast Phenomena and Nanophotonics XXVI, 2022, vol. 11999, doi: 10.1117/12.2607447.","chicago":"Trautmann, Alexander, Ruixin Zuo, Guifang Wang, Wolf-Rüdiger Hannes, Shidong Yang, Le Huu Thong, Cong Ngo, et al. “Microscopic Simulations of High Harmonic Generation from Semiconductors.” In Ultrafast Phenomena and Nanophotonics XXVI, edited by Markus Betz and Abdulhakem Y. Elezzabi, Vol. 11999. SPIE Proceedings, 2022. https://doi.org/10.1117/12.2607447.","ama":"Trautmann A, Zuo R, Wang G, et al. Microscopic simulations of high harmonic generation from semiconductors. In: Betz M, Elezzabi AY, eds. Ultrafast Phenomena and Nanophotonics XXVI. Vol 11999. SPIE Proceedings. ; 2022. doi:10.1117/12.2607447"},"intvolume":" 11999","date_updated":"2023-04-20T14:52:24Z","author":[{"last_name":"Trautmann","full_name":"Trautmann, Alexander","id":"38163","first_name":"Alexander"},{"last_name":"Zuo","full_name":"Zuo, Ruixin","first_name":"Ruixin"},{"first_name":"Guifang","last_name":"Wang","full_name":"Wang, Guifang"},{"first_name":"Wolf-Rüdiger","full_name":"Hannes, Wolf-Rüdiger","last_name":"Hannes"},{"full_name":"Yang, Shidong","last_name":"Yang","first_name":"Shidong"},{"full_name":"Thong, Le Huu","last_name":"Thong","first_name":"Le Huu"},{"first_name":"Cong","last_name":"Ngo","full_name":"Ngo, Cong"},{"full_name":"Steiner, Johannes","last_name":"Steiner","first_name":"Johannes"},{"full_name":"Ciappina, Marcelo","last_name":"Ciappina","first_name":"Marcelo"},{"full_name":"Reichelt, Matthias","id":"138","last_name":"Reichelt","first_name":"Matthias"},{"first_name":"Huynh Thanh","full_name":"Duc, Huynh Thanh","last_name":"Duc"},{"first_name":"Xiaohong","last_name":"Song","full_name":"Song, Xiaohong"},{"first_name":"Weifeng","full_name":"Yang, Weifeng","last_name":"Yang"},{"full_name":"Meier, Torsten","id":"344","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten"}],"date_created":"2023-01-18T11:22:45Z","volume":11999,"title":"Microscopic simulations of high harmonic generation from semiconductors","doi":"10.1117/12.2607447"},{"project":[{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_id":"59","name":"TRR 142 - A02: TRR 142 - Subproject A02"}],"_id":"37323","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"article_number":"115307","language":[{"iso":"eng"}],"type":"journal_article","publication":"Physical Review B","status":"public","publisher":"American Physical Society (APS)","date_updated":"2023-04-20T14:50:24Z","author":[{"first_name":"J.","full_name":"Paul, J.","last_name":"Paul"},{"last_name":"Rose","orcid":"0000-0002-3079-5428","id":"55958","full_name":"Rose, Hendrik","first_name":"Hendrik"},{"last_name":"Swagel","full_name":"Swagel, E.","first_name":"E."},{"first_name":"Torsten","full_name":"Meier, Torsten","id":"344","orcid":"0000-0001-8864-2072","last_name":"Meier"},{"last_name":"Wahlstrand","full_name":"Wahlstrand, J. K.","first_name":"J. K."},{"first_name":"A. D.","last_name":"Bristow","full_name":"Bristow, A. D."}],"date_created":"2023-01-18T11:10:42Z","volume":105,"title":"Coherent contributions to population dynamics in a semiconductor microcavity","doi":"10.1103/physrevb.105.115307","publication_status":"published","publication_identifier":{"issn":["2469-9950","2469-9969"]},"issue":"11","year":"2022","citation":{"mla":"Paul, J., et al. “Coherent Contributions to Population Dynamics in a Semiconductor Microcavity.” Physical Review B, vol. 105, no. 11, 115307, American Physical Society (APS), 2022, doi:10.1103/physrevb.105.115307.","bibtex":"@article{Paul_Rose_Swagel_Meier_Wahlstrand_Bristow_2022, title={Coherent contributions to population dynamics in a semiconductor microcavity}, volume={105}, DOI={10.1103/physrevb.105.115307}, number={11115307}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Paul, J. and Rose, Hendrik and Swagel, E. and Meier, Torsten and Wahlstrand, J. K. and Bristow, A. D.}, year={2022} }","short":"J. Paul, H. Rose, E. Swagel, T. Meier, J.K. Wahlstrand, A.D. Bristow, Physical Review B 105 (2022).","apa":"Paul, J., Rose, H., Swagel, E., Meier, T., Wahlstrand, J. K., & Bristow, A. D. (2022). Coherent contributions to population dynamics in a semiconductor microcavity. Physical Review B, 105(11), Article 115307. https://doi.org/10.1103/physrevb.105.115307","ama":"Paul J, Rose H, Swagel E, Meier T, Wahlstrand JK, Bristow AD. Coherent contributions to population dynamics in a semiconductor microcavity. Physical Review B. 2022;105(11). doi:10.1103/physrevb.105.115307","ieee":"J. Paul, H. Rose, E. Swagel, T. Meier, J. K. Wahlstrand, and A. D. Bristow, “Coherent contributions to population dynamics in a semiconductor microcavity,” Physical Review B, vol. 105, no. 11, Art. no. 115307, 2022, doi: 10.1103/physrevb.105.115307.","chicago":"Paul, J., Hendrik Rose, E. Swagel, Torsten Meier, J. K. Wahlstrand, and A. D. Bristow. “Coherent Contributions to Population Dynamics in a Semiconductor Microcavity.” Physical Review B 105, no. 11 (2022). https://doi.org/10.1103/physrevb.105.115307."},"intvolume":" 105"},{"type":"journal_article","status":"public","_id":"40523","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - A03: TRR 142 - Subproject A03","_id":"60"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"15"},{"_id":"297"},{"_id":"230"},{"_id":"429"},{"_id":"27"},{"_id":"623"},{"_id":"170"},{"_id":"35"}],"user_id":"16199","article_number":"1387","publication_identifier":{"issn":["2041-1723"]},"publication_status":"published","intvolume":" 13","citation":{"bibtex":"@article{Jonas_Heinze_Schöll_Kallert_Langer_Krehs_Widhalm_Jöns_Reuter_Schumacher_et al._2022, title={Nonlinear down-conversion in a single quantum dot}, volume={13}, DOI={10.1038/s41467-022-28993-3}, number={11387}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Jonas, B. and Heinze, Dirk Florian and Schöll, E. and Kallert, P. and Langer, T. and Krehs, S. and Widhalm, A. and Jöns, Klaus and Reuter, Dirk and Schumacher, Stefan and et al.}, year={2022} }","mla":"Jonas, B., et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” Nature Communications, vol. 13, no. 1, 1387, Springer Science and Business Media LLC, 2022, doi:10.1038/s41467-022-28993-3.","short":"B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, S. Schumacher, A. Zrenner, Nature Communications 13 (2022).","apa":"Jonas, B., Heinze, D. F., Schöll, E., Kallert, P., Langer, T., Krehs, S., Widhalm, A., Jöns, K., Reuter, D., Schumacher, S., & Zrenner, A. (2022). Nonlinear down-conversion in a single quantum dot. Nature Communications, 13(1), Article 1387. https://doi.org/10.1038/s41467-022-28993-3","ama":"Jonas B, Heinze DF, Schöll E, et al. Nonlinear down-conversion in a single quantum dot. Nature Communications. 2022;13(1). doi:10.1038/s41467-022-28993-3","chicago":"Jonas, B., Dirk Florian Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” Nature Communications 13, no. 1 (2022). https://doi.org/10.1038/s41467-022-28993-3.","ieee":"B. Jonas et al., “Nonlinear down-conversion in a single quantum dot,” Nature Communications, vol. 13, no. 1, Art. no. 1387, 2022, doi: 10.1038/s41467-022-28993-3."},"date_updated":"2023-04-20T15:18:31Z","volume":13,"author":[{"last_name":"Jonas","full_name":"Jonas, B.","first_name":"B."},{"last_name":"Heinze","full_name":"Heinze, Dirk Florian","id":"10904","first_name":"Dirk Florian"},{"last_name":"Schöll","full_name":"Schöll, E.","first_name":"E."},{"first_name":"P.","last_name":"Kallert","full_name":"Kallert, P."},{"last_name":"Langer","full_name":"Langer, T.","first_name":"T."},{"full_name":"Krehs, S.","last_name":"Krehs","first_name":"S."},{"first_name":"A.","full_name":"Widhalm, A.","last_name":"Widhalm"},{"first_name":"Klaus","id":"85353","full_name":"Jöns, Klaus","last_name":"Jöns"},{"first_name":"Dirk","full_name":"Reuter, Dirk","id":"37763","last_name":"Reuter"},{"id":"27271","full_name":"Schumacher, Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","first_name":"Stefan"},{"first_name":"Artur","orcid":"0000-0002-5190-0944","last_name":"Zrenner","id":"606","full_name":"Zrenner, Artur"}],"doi":"10.1038/s41467-022-28993-3","publication":"Nature Communications","abstract":[{"text":"AbstractTailored nanoscale quantum light sources, matching the specific needs of use cases, are crucial building blocks for photonic quantum technologies. Several different approaches to realize solid-state quantum emitters with high performance have been pursued and different concepts for energy tuning have been established. However, the properties of the emitted photons are always defined by the individual quantum emitter and can therefore not be controlled with full flexibility. Here we introduce an all-optical nonlinear method to tailor and control the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a semiconductor quantum three-level system. Based on this concept, we realize energy tuning and polarization control of the single photon emission with a control-laser field. Our results mark an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles.","lang":"eng"}],"keyword":["General Physics and Astronomy","General Biochemistry","Genetics and Molecular Biology","General Chemistry","Multidisciplinary"],"language":[{"iso":"eng"}],"issue":"1","year":"2022","publisher":"Springer Science and Business Media LLC","date_created":"2023-01-27T13:41:42Z","title":"Nonlinear down-conversion in a single quantum dot"},{"year":"2022","issue":"4","title":"Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton","publisher":"American Physical Society (APS)","date_created":"2023-01-26T15:45:42Z","publication":"Physical Review B","language":[{"iso":"eng"}],"intvolume":" 105","citation":{"chicago":"Praschan, Tom, Dirk Heinze, Dominik Breddermann, Artur Zrenner, Andrea Walther, and Stefan Schumacher. “Pulse Shaping for On-Demand Emission of Single Raman Photons from a Quantum-Dot Biexciton.” Physical Review B 105, no. 4 (2022). https://doi.org/10.1103/physrevb.105.045302.","ieee":"T. Praschan, D. Heinze, D. Breddermann, A. Zrenner, A. Walther, and S. Schumacher, “Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton,” Physical Review B, vol. 105, no. 4, Art. no. 045302, 2022, doi: 10.1103/physrevb.105.045302.","ama":"Praschan T, Heinze D, Breddermann D, Zrenner A, Walther A, Schumacher S. Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton. Physical Review B. 2022;105(4). doi:10.1103/physrevb.105.045302","bibtex":"@article{Praschan_Heinze_Breddermann_Zrenner_Walther_Schumacher_2022, title={Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton}, volume={105}, DOI={10.1103/physrevb.105.045302}, number={4045302}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Praschan, Tom and Heinze, Dirk and Breddermann, Dominik and Zrenner, Artur and Walther, Andrea and Schumacher, Stefan}, year={2022} }","short":"T. Praschan, D. Heinze, D. Breddermann, A. Zrenner, A. Walther, S. Schumacher, Physical Review B 105 (2022).","mla":"Praschan, Tom, et al. “Pulse Shaping for On-Demand Emission of Single Raman Photons from a Quantum-Dot Biexciton.” Physical Review B, vol. 105, no. 4, 045302, American Physical Society (APS), 2022, doi:10.1103/physrevb.105.045302.","apa":"Praschan, T., Heinze, D., Breddermann, D., Zrenner, A., Walther, A., & Schumacher, S. (2022). Pulse shaping for on-demand emission of single Raman photons from a quantum-dot biexciton. Physical Review B, 105(4), Article 045302. https://doi.org/10.1103/physrevb.105.045302"},"publication_identifier":{"issn":["2469-9950","2469-9969"]},"publication_status":"published","doi":"10.1103/physrevb.105.045302","date_updated":"2023-04-20T15:19:24Z","volume":105,"author":[{"last_name":"Praschan","full_name":"Praschan, Tom","first_name":"Tom"},{"first_name":"Dirk","full_name":"Heinze, Dirk","last_name":"Heinze"},{"first_name":"Dominik","full_name":"Breddermann, Dominik","last_name":"Breddermann"},{"orcid":"0000-0002-5190-0944","last_name":"Zrenner","full_name":"Zrenner, Artur","id":"606","first_name":"Artur"},{"full_name":"Walther, Andrea","last_name":"Walther","first_name":"Andrea"},{"full_name":"Schumacher, Stefan","id":"27271","last_name":"Schumacher","orcid":"0000-0003-4042-4951","first_name":"Stefan"}],"status":"public","type":"journal_article","article_number":"045302","_id":"40431","project":[{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"_id":"60","name":"TRR 142 - A3: TRR 142 - Subproject A3"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"290"},{"_id":"230"},{"_id":"429"},{"_id":"623"},{"_id":"35"}],"user_id":"16199"},{"citation":{"mla":"Jonas, Björn, et al. Nonlinear Down-Conversion in a Single Quantum Dot. LibreCat University, 2022, doi:10.5281/ZENODO.6024228.","short":"B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, A. Zrenner, Nonlinear Down-Conversion in a Single Quantum Dot, LibreCat University, 2022.","bibtex":"@book{Jonas_Heinze_Schöll_Kallert_Langer_Krehs_Widhalm_Jöns_Reuter_Zrenner_2022, title={Nonlinear down-conversion in a single quantum dot}, DOI={10.5281/ZENODO.6024228}, publisher={LibreCat University}, author={Jonas, Björn and Heinze, Dirk Florian and Schöll, Eva and Kallert, Patricia and Langer, Timo and Krehs, Sebastian and Widhalm, Alex and Jöns, Klaus and Reuter, Dirk and Zrenner, Artur}, year={2022} }","apa":"Jonas, B., Heinze, D. F., Schöll, E., Kallert, P., Langer, T., Krehs, S., Widhalm, A., Jöns, K., Reuter, D., & Zrenner, A. (2022). Nonlinear down-conversion in a single quantum dot. LibreCat University. https://doi.org/10.5281/ZENODO.6024228","ieee":"B. Jonas et al., Nonlinear down-conversion in a single quantum dot. LibreCat University, 2022.","chicago":"Jonas, Björn, Dirk Florian Heinze, Eva Schöll, Patricia Kallert, Timo Langer, Sebastian Krehs, Alex Widhalm, Klaus Jöns, Dirk Reuter, and Artur Zrenner. Nonlinear Down-Conversion in a Single Quantum Dot. LibreCat University, 2022. https://doi.org/10.5281/ZENODO.6024228.","ama":"Jonas B, Heinze DF, Schöll E, et al. Nonlinear Down-Conversion in a Single Quantum Dot. LibreCat University; 2022. doi:10.5281/ZENODO.6024228"},"year":"2022","doi":"10.5281/ZENODO.6024228","title":"Nonlinear down-conversion in a single quantum dot","author":[{"first_name":"Björn","full_name":"Jonas, Björn","last_name":"Jonas"},{"first_name":"Dirk Florian","last_name":"Heinze","full_name":"Heinze, Dirk Florian","id":"10904"},{"first_name":"Eva","full_name":"Schöll, Eva","last_name":"Schöll"},{"first_name":"Patricia","full_name":"Kallert, Patricia","last_name":"Kallert"},{"full_name":"Langer, Timo","last_name":"Langer","first_name":"Timo"},{"first_name":"Sebastian","last_name":"Krehs","full_name":"Krehs, Sebastian"},{"full_name":"Widhalm, Alex","last_name":"Widhalm","first_name":"Alex"},{"first_name":"Klaus","full_name":"Jöns, Klaus","id":"85353","last_name":"Jöns"},{"full_name":"Reuter, Dirk","id":"37763","last_name":"Reuter","first_name":"Dirk"},{"id":"606","full_name":"Zrenner, Artur","last_name":"Zrenner","orcid":"0000-0002-5190-0944","first_name":"Artur"}],"date_created":"2023-01-26T15:38:28Z","publisher":"LibreCat University","date_updated":"2023-04-20T15:18:48Z","status":"public","type":"research_data","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"290"},{"_id":"292"},{"_id":"642"},{"_id":"230"},{"_id":"429"},{"_id":"35"}],"user_id":"16199","_id":"40428","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"},{"name":"TRR 142 - A3: TRR 142 - Subproject A3","_id":"60"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}]},{"type":"journal_article","publication":"Applied Physics A","abstract":[{"lang":"eng","text":"AbstractPolarons influence decisively the performance of lithium niobate for optical applications. In this work, the formation of (defect) bound polarons in lithium niobate is studied by ab initio molecular dynamics. The calculations show a broad scatter of polaron formation times. Rising temperature increases the share of trajectories with long formation times, which leads to an overall increase of the average formation time with temperature. However, even at elevated temperatures, the average formation time does not exceed the value of 100 femtoseconds, i.e., a value close to the time measured for free, i.e., self-trapped polarons. Analyzing individual trajectories, it is found that the time required for the structural relaxation of the polarons depends sensitively on the excitation of the lithium niobate high-frequency phonon modes and their phase relation."}],"status":"public","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - A11: TRR 142 - Subproject A11","_id":"166"},{"name":"TRR 142 - B07: TRR 142 - Subproject B07","_id":"168"}],"_id":"37711","user_id":"171","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"230"},{"_id":"429"},{"_id":"35"},{"_id":"790"}],"keyword":["General Materials Science","General Chemistry"],"language":[{"iso":"eng"}],"publication_status":"published","publication_identifier":{"issn":["0947-8396","1432-0630"]},"year":"2022","citation":{"apa":"Krenz, M., Gerstmann, U., & Schmidt, W. G. (2022). Bound polaron formation in lithium niobate from ab initio molecular dynamics. Applied Physics A, 128, 480. https://doi.org/10.1007/s00339-022-05577-y","mla":"Krenz, Marvin, et al. “Bound Polaron Formation in Lithium Niobate from Ab Initio Molecular Dynamics.” Applied Physics A, vol. 128, Springer Science and Business Media LLC, 2022, p. 480, doi:10.1007/s00339-022-05577-y.","short":"M. Krenz, U. Gerstmann, W.G. Schmidt, Applied Physics A 128 (2022) 480.","bibtex":"@article{Krenz_Gerstmann_Schmidt_2022, title={Bound polaron formation in lithium niobate from ab initio molecular dynamics}, volume={128}, DOI={10.1007/s00339-022-05577-y}, journal={Applied Physics A}, publisher={Springer Science and Business Media LLC}, author={Krenz, Marvin and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2022}, pages={480} }","chicago":"Krenz, Marvin, Uwe Gerstmann, and Wolf Gero Schmidt. “Bound Polaron Formation in Lithium Niobate from Ab Initio Molecular Dynamics.” Applied Physics A 128 (2022): 480. https://doi.org/10.1007/s00339-022-05577-y.","ieee":"M. Krenz, U. Gerstmann, and W. G. Schmidt, “Bound polaron formation in lithium niobate from ab initio molecular dynamics,” Applied Physics A, vol. 128, p. 480, 2022, doi: 10.1007/s00339-022-05577-y.","ama":"Krenz M, Gerstmann U, Schmidt WG. Bound polaron formation in lithium niobate from ab initio molecular dynamics. Applied Physics A. 2022;128:480. doi:10.1007/s00339-022-05577-y"},"intvolume":" 128","page":"480","publisher":"Springer Science and Business Media LLC","date_updated":"2023-04-21T11:06:37Z","date_created":"2023-01-20T11:18:44Z","author":[{"first_name":"Marvin","full_name":"Krenz, Marvin","id":"52309","last_name":"Krenz"},{"first_name":"Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann","id":"171","full_name":"Gerstmann, Uwe"},{"first_name":"Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076","full_name":"Schmidt, Wolf Gero","id":"468"}],"volume":128,"title":"Bound polaron formation in lithium niobate from ab initio molecular dynamics","doi":"10.1007/s00339-022-05577-y"},{"_id":"33484","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_id":"168","name":"TRR 142 - B07: TRR 142 - Subproject B07"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - A11: TRR 142 - Subproject A11","_id":"166"}],"department":[{"_id":"15"},{"_id":"288"},{"_id":"623"},{"_id":"170"},{"_id":"295"},{"_id":"230"},{"_id":"429"},{"_id":"35"},{"_id":"790"}],"user_id":"171","language":[{"iso":"eng"}],"publication":"Crystals","type":"journal_article","abstract":[{"text":"We study the DC conductivity in potassium titanyl phosphate (KTiOPO4, KTP) and its isomorphs KTiOAsO4 (KTA) and Rb1%K99%TiOPO4 (RKTP) and introduce a method by which to reduce the overall ionic conductivity in KTP by a potassium nitrate treatment. Furthermore, we create so-called gray tracking in KTP and investigate the ionic conductivity in theses areas. A local unintended reduction of the ionic conductivity is observed in the gray-tracked regions, which also induce additional optical absorption in the material. We show that a thermal treatment in an oxygen-rich atmosphere removes the gray tracking and brings the ionic conductivity as well as the optical transmission back to the original level. These studies can help to choose the best material and treatment for specific applications.","lang":"eng"}],"status":"public","oa":"1","date_updated":"2023-04-21T11:07:11Z","volume":12,"date_created":"2022-09-26T13:12:48Z","author":[{"first_name":"Laura","id":"40300","full_name":"Padberg, Laura","last_name":"Padberg"},{"first_name":"Viktor","last_name":"Quiring","full_name":"Quiring, Viktor"},{"id":"58349","full_name":"Bocchini, Adriana","last_name":"Bocchini","orcid":"0000-0002-2134-3075","first_name":"Adriana"},{"last_name":"Santandrea","orcid":"0000-0001-5718-358X","full_name":"Santandrea, Matteo","id":"55095","first_name":"Matteo"},{"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"},{"full_name":"Silberhorn, Christine","id":"26263","last_name":"Silberhorn","first_name":"Christine"},{"full_name":"Eigner, Christof","id":"13244","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","first_name":"Christof"}],"title":"DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking","doi":"10.3390/cryst12101359","main_file_link":[{"open_access":"1"}],"publication_identifier":{"issn":["2073-4352"]},"year":"2022","intvolume":" 12","page":"1359","citation":{"apa":"Padberg, L., Quiring, V., Bocchini, A., Santandrea, M., Gerstmann, U., Schmidt, W. G., Silberhorn, C., & Eigner, C. (2022). DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking. Crystals, 12, 1359. https://doi.org/10.3390/cryst12101359","bibtex":"@article{Padberg_Quiring_Bocchini_Santandrea_Gerstmann_Schmidt_Silberhorn_Eigner_2022, title={DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking}, volume={12}, DOI={10.3390/cryst12101359}, journal={Crystals}, author={Padberg, Laura and Quiring, Viktor and Bocchini, Adriana and Santandrea, Matteo and Gerstmann, Uwe and Schmidt, Wolf Gero and Silberhorn, Christine and Eigner, Christof}, year={2022}, pages={1359} }","short":"L. Padberg, V. Quiring, A. Bocchini, M. Santandrea, U. Gerstmann, W.G. Schmidt, C. Silberhorn, C. Eigner, Crystals 12 (2022) 1359.","mla":"Padberg, Laura, et al. “DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking.” Crystals, vol. 12, 2022, p. 1359, doi:10.3390/cryst12101359.","ieee":"L. Padberg et al., “DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking,” Crystals, vol. 12, p. 1359, 2022, doi: 10.3390/cryst12101359.","chicago":"Padberg, Laura, Viktor Quiring, Adriana Bocchini, Matteo Santandrea, Uwe Gerstmann, Wolf Gero Schmidt, Christine Silberhorn, and Christof Eigner. “DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking.” Crystals 12 (2022): 1359. https://doi.org/10.3390/cryst12101359.","ama":"Padberg L, Quiring V, Bocchini A, et al. DC Ionic Conductivity in KTP and Its Isomorphs: Properties, Methods for Suppression, and Its Connection to Gray Tracking. Crystals. 2022;12:1359. doi:10.3390/cryst12101359"}},{"ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"publication":"Integrated Optics: Devices, Materials, and Technologies XXVI","abstract":[{"lang":"eng","text":"Online solvers for a series of standard 1-D or 2-D problems in integrated optics will be discussed. Implemented on the basis of HTML/JavaScript/SVG with core routines compiled from well tested C++-sources, the quasi-analytical algorithms require a computational load that can be handled easily even by current mobile devices. So far the series covers the 1-D guided modes of dielectric multilayer slab waveguides and the oblique plane wave reflection from these, the modes of rectangular channel waveguides (in an approximation of effective indices), bend modes of curved multilayer slabs, whispering-gallery resonances (“Quasi-Normal-Modes”) supported by circular dielectric cavities, the hybrid modes of circular multi-step-index optical fibers, bound and leaky modes of 1-D complex multilayers, including plasmonic surface modes, and, with restrictions, quite general rectangular scattering problems in 2-D."}],"file":[{"creator":"fossie","date_created":"2022-03-22T18:05:02Z","date_updated":"2022-03-22T18:05:02Z","file_id":"30445","file_name":"2022-03 Hammer - SPIE Photonics West 2022 - Small-scale online simulations in guided-wave photonics (official version).pdf","access_level":"open_access","file_size":868473,"content_type":"application/pdf","relation":"main_file"}],"publisher":"SPIE","date_created":"2022-03-21T10:17:30Z","title":"Small-scale online simulations in guided-wave photonics","year":"2022","project":[{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"name":"TRR 142 - C05: TRR 142 - Subproject C05","_id":"75"}],"_id":"30389","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"file_date_updated":"2022-03-22T18:05:02Z","type":"conference","editor":[{"full_name":"García-Blanco, Sonia M.","last_name":"García-Blanco","first_name":"Sonia M."},{"full_name":"Cheben, Pavel","last_name":"Cheben","first_name":"Pavel"}],"status":"public","date_updated":"2023-04-20T10:10:55Z","oa":"1","author":[{"full_name":"Hammer, Manfred","id":"48077","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"}],"doi":"10.1117/12.2612208","publication_status":"published","has_accepted_license":"1","citation":{"apa":"Hammer, M. (2022). Small-scale online simulations in guided-wave photonics. In S. M. García-Blanco & P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVI (p. 1200414). SPIE. https://doi.org/10.1117/12.2612208","mla":"Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.” Integrated Optics: Devices, Materials, and Technologies XXVI, edited by Sonia M. García-Blanco and Pavel Cheben, SPIE, 2022, p. 1200414, doi:10.1117/12.2612208.","bibtex":"@inproceedings{Hammer_2022, title={Small-scale online simulations in guided-wave photonics}, DOI={10.1117/12.2612208}, booktitle={Integrated Optics: Devices, Materials, and Technologies XXVI}, publisher={SPIE}, author={Hammer, Manfred}, editor={García-Blanco, Sonia M. and Cheben, Pavel}, year={2022}, pages={1200414} }","short":"M. Hammer, in: S.M. García-Blanco, P. Cheben (Eds.), Integrated Optics: Devices, Materials, and Technologies XXVI, SPIE, 2022, p. 1200414.","chicago":"Hammer, Manfred. “Small-Scale Online Simulations in Guided-Wave Photonics.” In Integrated Optics: Devices, Materials, and Technologies XXVI, edited by Sonia M. García-Blanco and Pavel Cheben, 1200414. SPIE, 2022. https://doi.org/10.1117/12.2612208.","ieee":"M. Hammer, “Small-scale online simulations in guided-wave photonics,” in Integrated Optics: Devices, Materials, and Technologies XXVI, 2022, p. 1200414, doi: 10.1117/12.2612208.","ama":"Hammer M. Small-scale online simulations in guided-wave photonics. In: García-Blanco SM, Cheben P, eds. Integrated Optics: Devices, Materials, and Technologies XXVI. SPIE; 2022:1200414. doi:10.1117/12.2612208"},"page":"1200414"},{"year":"2022","issue":"1","quality_controlled":"1","title":"Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4","date_created":"2021-10-20T13:00:04Z","publisher":"IOP Publishing","file":[{"content_type":"application/pdf","relation":"main_file","date_updated":"2021-11-22T17:57:00Z","date_created":"2021-11-22T17:57:00Z","creator":"schindlm","description":"Creative Commons Attribution 4.0 International Public License (CC BY 4.0)","file_size":2687065,"title":"Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4","file_name":"Neufeld_2022_J._Phys._Mater._5_015002.pdf","file_id":"27705","access_level":"open_access"}],"abstract":[{"text":"Many-body perturbation theory based on density-functional theory calculations is used to determine the quasiparticle band structures and the dielectric functions of the isomorphic ferroelectrics rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenide (KTiOAsO4). Self-energy corrections of more than 2 eV are found to widen the transport band gaps of both materials considerably to 5.3 and 5.2 eV, respectively. At the same time, both materials are characterized by strong exciton binding energies of 1.4 and 1.5 eV, respectively. The solution of the Bethe-Salpeter equation based on the quasiparticle energies results in onsets of the optical absorption within the range of the measured data.","lang":"eng"}],"publication":"Journal of Physics: Materials","language":[{"iso":"eng"}],"ddc":["530"],"external_id":{"isi":["000721060500001"]},"intvolume":" 5","citation":{"chicago":"Neufeld, Sergej, Arno Schindlmayr, and Wolf Gero Schmidt. “Quasiparticle Energies and Optical Response of RbTiOPO4 and KTiOAsO4.” Journal of Physics: Materials 5, no. 1 (2022). https://doi.org/10.1088/2515-7639/ac3384.","ieee":"S. Neufeld, A. Schindlmayr, and W. G. Schmidt, “Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4,” Journal of Physics: Materials, vol. 5, no. 1, Art. no. 015002, 2022, doi: 10.1088/2515-7639/ac3384.","ama":"Neufeld S, Schindlmayr A, Schmidt WG. Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4. Journal of Physics: Materials. 2022;5(1). doi:10.1088/2515-7639/ac3384","short":"S. Neufeld, A. Schindlmayr, W.G. Schmidt, Journal of Physics: Materials 5 (2022).","mla":"Neufeld, Sergej, et al. “Quasiparticle Energies and Optical Response of RbTiOPO4 and KTiOAsO4.” Journal of Physics: Materials, vol. 5, no. 1, 015002, IOP Publishing, 2022, doi:10.1088/2515-7639/ac3384.","bibtex":"@article{Neufeld_Schindlmayr_Schmidt_2022, title={Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4}, volume={5}, DOI={10.1088/2515-7639/ac3384}, number={1015002}, journal={Journal of Physics: Materials}, publisher={IOP Publishing}, author={Neufeld, Sergej and Schindlmayr, Arno and Schmidt, Wolf Gero}, year={2022} }","apa":"Neufeld, S., Schindlmayr, A., & Schmidt, W. G. (2022). Quasiparticle energies and optical response of RbTiOPO4 and KTiOAsO4. Journal of Physics: Materials, 5(1), Article 015002. https://doi.org/10.1088/2515-7639/ac3384"},"has_accepted_license":"1","publication_identifier":{"eissn":["2515-7639"]},"publication_status":"published","doi":"10.1088/2515-7639/ac3384","volume":5,"author":[{"first_name":"Sergej","last_name":"Neufeld","full_name":"Neufeld, Sergej","id":"23261"},{"first_name":"Arno","last_name":"Schindlmayr","orcid":"0000-0002-4855-071X","id":"458","full_name":"Schindlmayr, Arno"},{"first_name":"Wolf Gero","id":"468","full_name":"Schmidt, Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076"}],"date_updated":"2023-04-20T14:01:16Z","oa":"1","status":"public","type":"journal_article","file_date_updated":"2021-11-22T17:57:00Z","funded_apc":"1","article_type":"original","article_number":"015002","isi":"1","department":[{"_id":"296"},{"_id":"295"},{"_id":"230"},{"_id":"429"},{"_id":"15"},{"_id":"170"},{"_id":"35"}],"user_id":"16199","_id":"26627","project":[{"name":"TRR 142","_id":"53"},{"_id":"55","name":"TRR 142 - Project Area B"},{"name":"TRR 142 - Subproject B4","_id":"69"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142 - B07: TRR 142 - Subproject B07","_id":"168"}]}]