[{"user_id":"665","title":"Vergleichende Untersuchung der Wirkung verschiedener Mikrostrukturen auf die Flüssigkeitsausbreitung","status":"public","date_created":"2023-03-27T15:26:18Z","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"author":[{"first_name":"Christopher","full_name":"Dechert, Christopher","last_name":"Dechert","id":"69828"},{"full_name":"Kengni Nkouemou, Augustin","first_name":"Augustin","last_name":"Kengni Nkouemou"},{"first_name":"Eugeny Y.","full_name":"Kenig, Eugeny Y.","last_name":"Kenig","id":"665"}],"department":[{"_id":"9"},{"_id":"145"}],"date_updated":"2023-04-19T11:41:08Z","_id":"43111","conference":{"start_date":"2023-03-21","name":"Jahrestreffen der Fachgruppen Fluidverfahrenstechnik und Adsorption","location":"Frankfurt am Main","end_date":"2023-03-23"},"language":[{"iso":"eng"}],"type":"conference_abstract","year":"2023","citation":{"ieee":"C. Dechert, A. Kengni Nkouemou, and E. Y. Kenig, “Vergleichende Untersuchung der Wirkung verschiedener Mikrostrukturen auf die Flüssigkeitsausbreitung,” presented at the Jahrestreffen der Fachgruppen Fluidverfahrenstechnik und Adsorption, Frankfurt am Main, 2023.","short":"C. Dechert, A. Kengni Nkouemou, E.Y. Kenig, in: 2023.","mla":"Dechert, Christopher, et al. Vergleichende Untersuchung Der Wirkung Verschiedener Mikrostrukturen Auf Die Flüssigkeitsausbreitung. 2023.","bibtex":"@inproceedings{Dechert_Kengni Nkouemou_Kenig_2023, title={Vergleichende Untersuchung der Wirkung verschiedener Mikrostrukturen auf die Flüssigkeitsausbreitung}, author={Dechert, Christopher and Kengni Nkouemou, Augustin and Kenig, Eugeny Y.}, year={2023} }","chicago":"Dechert, Christopher, Augustin Kengni Nkouemou, and Eugeny Y. Kenig. “Vergleichende Untersuchung Der Wirkung Verschiedener Mikrostrukturen Auf Die Flüssigkeitsausbreitung,” 2023.","apa":"Dechert, C., Kengni Nkouemou, A., & Kenig, E. Y. (2023). Vergleichende Untersuchung der Wirkung verschiedener Mikrostrukturen auf die Flüssigkeitsausbreitung. Jahrestreffen der Fachgruppen Fluidverfahrenstechnik und Adsorption, Frankfurt am Main.","ama":"Dechert C, Kengni Nkouemou A, Kenig EY. Vergleichende Untersuchung der Wirkung verschiedener Mikrostrukturen auf die Flüssigkeitsausbreitung. In: ; 2023."}},{"intvolume":" 40","_id":"43245","issue":"4","citation":{"chicago":"Hammer, Manfred, Henna Farheen, and Jens Förstner. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” Journal of the Optical Society of America B 40, no. 4 (2023): 862. https://doi.org/10.1364/josab.485725.","ama":"Hammer M, Farheen H, Förstner J. How to suppress radiative losses in high-contrast integrated Bragg gratings. Journal of the Optical Society of America B. 2023;40(4):862. doi:10.1364/josab.485725","apa":"Hammer, M., Farheen, H., & Förstner, J. (2023). How to suppress radiative losses in high-contrast integrated Bragg gratings. Journal of the Optical Society of America B, 40(4), 862. https://doi.org/10.1364/josab.485725","bibtex":"@article{Hammer_Farheen_Förstner_2023, title={How to suppress radiative losses in high-contrast integrated Bragg gratings}, volume={40}, DOI={10.1364/josab.485725}, number={4}, journal={Journal of the Optical Society of America B}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Farheen, Henna and Förstner, Jens}, year={2023}, pages={862} }","mla":"Hammer, Manfred, et al. “How to Suppress Radiative Losses in High-Contrast Integrated Bragg Gratings.” Journal of the Optical Society of America B, vol. 40, no. 4, Optica Publishing Group, 2023, p. 862, doi:10.1364/josab.485725.","short":"M. Hammer, H. Farheen, J. Förstner, Journal of the Optical Society of America B 40 (2023) 862.","ieee":"M. Hammer, H. Farheen, and J. Förstner, “How to suppress radiative losses in high-contrast integrated Bragg gratings,” Journal of the Optical Society of America B, vol. 40, no. 4, p. 862, 2023, doi: 10.1364/josab.485725."},"type":"journal_article","year":"2023","page":"862","abstract":[{"text":"High-contrast slab waveguide Bragg gratings with 1D periodicity are investigated. For specific oblique excitation by semi-guided waves at sufficiently high angles of incidence, the idealized structures do not exhibit any radiative losses, such that reflectance and transmittance for the single port mode add strictly up to one. We consider a series of symmetric, fully and partly etched finite gratings, for parameters found in integrated silicon photonics. These can act as spectral filters with a reasonably flattop response. Apodization can lead to more box shaped reflectance and transmittance spectra. Together with a narrowband Fabry–Perot filter, these configurations are characterized by reflection bands, or transmittance peaks, with widths that span three orders of magnitude.","lang":"eng"}],"user_id":"158","ddc":["530"],"file":[{"file_size":1982311,"creator":"fossie","file_id":"43247","date_updated":"2023-03-31T13:14:59Z","content_type":"application/pdf","relation":"main_file","date_created":"2023-03-31T13:14:59Z","file_name":"ogr-afterreview.pdf","access_level":"open_access"}],"publisher":"Optica Publishing Group","author":[{"orcid":"0000-0002-6331-9348","full_name":"Hammer, Manfred","first_name":"Manfred","id":"48077","last_name":"Hammer"},{"last_name":"Farheen","first_name":"Henna","full_name":"Farheen, Henna"},{"orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","first_name":"Jens","id":"158","last_name":"Förstner"}],"publication":"Journal of the Optical Society of America B","file_date_updated":"2023-03-31T13:14:59Z","keyword":["tet_topic_waveguide"],"has_accepted_license":"1","status":"public","date_created":"2023-03-31T13:04:43Z","volume":40,"date_updated":"2023-04-20T10:03:40Z","oa":"1","doi":"10.1364/josab.485725","language":[{"iso":"eng"}],"title":"How to suppress radiative losses in high-contrast integrated Bragg gratings","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"project":[{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"_id":"167","name":"TRR 142 - B06: TRR 142 - Subproject B06"}],"publication_status":"published","publication_identifier":{"issn":["0740-3224","1520-8540"]}},{"date_updated":"2023-04-20T12:44:55Z","doi":"10.1103/prxquantum.4.020306","language":[{"iso":"eng"}],"title":"Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States","department":[{"_id":"288"},{"_id":"623"}],"publication_identifier":{"issn":["2691-3399"]},"publication_status":"published","intvolume":" 4","_id":"44081","article_number":"020306","issue":"2","citation":{"chicago":"Serino, Laura, Jano Gil López, Michael Stefszky, Raimund Ricken, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States.” PRX Quantum 4, no. 2 (2023). https://doi.org/10.1103/prxquantum.4.020306.","ama":"Serino L, Gil López J, Stefszky M, et al. Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States. PRX Quantum. 2023;4(2). doi:10.1103/prxquantum.4.020306","apa":"Serino, L., Gil López, J., Stefszky, M., Ricken, R., Eigner, C., Brecht, B., & Silberhorn, C. (2023). Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States. PRX Quantum, 4(2), Article 020306. https://doi.org/10.1103/prxquantum.4.020306","mla":"Serino, Laura, et al. “Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States.” PRX Quantum, vol. 4, no. 2, 020306, American Physical Society (APS), 2023, doi:10.1103/prxquantum.4.020306.","bibtex":"@article{Serino_Gil López_Stefszky_Ricken_Eigner_Brecht_Silberhorn_2023, title={Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States}, volume={4}, DOI={10.1103/prxquantum.4.020306}, number={2020306}, journal={PRX Quantum}, publisher={American Physical Society (APS)}, author={Serino, Laura and Gil López, Jano and Stefszky, Michael and Ricken, Raimund and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2023} }","short":"L. Serino, J. Gil López, M. Stefszky, R. Ricken, C. Eigner, B. Brecht, C. Silberhorn, PRX Quantum 4 (2023).","ieee":"L. Serino et al., “Realization of a Multi-Output Quantum Pulse Gate for Decoding High-Dimensional Temporal Modes of Single-Photon States,” PRX Quantum, vol. 4, no. 2, Art. no. 020306, 2023, doi: 10.1103/prxquantum.4.020306."},"year":"2023","type":"journal_article","user_id":"88242","keyword":["General Physics and Astronomy","Mathematical Physics","Applied Mathematics","Electronic","Optical and Magnetic Materials","Electrical and Electronic Engineering","General Computer Science"],"publication":"PRX Quantum","author":[{"first_name":"Laura","full_name":"Serino, Laura","last_name":"Serino","id":"88242"},{"full_name":"Gil López, Jano","first_name":"Jano","id":"51223","last_name":"Gil López"},{"first_name":"Michael","full_name":"Stefszky, Michael","last_name":"Stefszky","id":"42777"},{"first_name":"Raimund","full_name":"Ricken, Raimund","last_name":"Ricken"},{"last_name":"Eigner","id":"13244","first_name":"Christof","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083"},{"first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin","last_name":"Brecht","id":"27150"},{"last_name":"Silberhorn","id":"26263","first_name":"Christine","full_name":"Silberhorn, Christine"}],"publisher":"American Physical Society (APS)","volume":4,"date_created":"2023-04-20T12:38:23Z","status":"public"},{"_id":"44080","date_updated":"2023-04-20T12:42:35Z","type":"book","citation":{"mla":"Ribbat, Christoph. Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America. 2023.","bibtex":"@book{Ribbat_2023, title={Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America}, author={Ribbat, Christoph}, year={2023} }","chicago":"Ribbat, Christoph. Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America, 2023.","ama":"Ribbat C. Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America.; 2023.","apa":"Ribbat, C. (2023). Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America.","ieee":"C. Ribbat, Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America. 2023.","short":"C. Ribbat, Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America, 2023."},"year":"2023","language":[{"iso":"eng"}],"title":"Breathing in Manhattan: Carola Speads - The German Jewish Gymnastics Instructor Who Brought Mindfulness to America","user_id":"426","author":[{"id":"426","last_name":"Ribbat","full_name":"Ribbat, Christoph","first_name":"Christoph"}],"status":"public","date_created":"2023-04-20T12:38:58Z"},{"language":[{"iso":"eng"}],"series_title":"SPIE Proceedings","doi":"10.1117/12.2650291","date_updated":"2023-04-20T14:42:33Z","publication_status":"published","department":[{"_id":"293"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"}],"title":"Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields","year":"2023","type":"conference","citation":{"bibtex":"@inproceedings{Meier_Stein_Schäfer_Anders_Littmann_Fey_Trautmann_Ngo_Steiner_Reichelt_et al._2023, series={SPIE Proceedings}, title={Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields}, volume={12419}, DOI={10.1117/12.2650291}, number={1241909}, booktitle={Ultrafast Phenomena and Nanophotonics XXVII}, publisher={SPIE }, author={Meier, Torsten and Stein, M. and Schäfer, F. and Anders, D. and Littmann, J. H. and Fey, M. and Trautmann, Alexander and Ngo, C. and Steiner, J. T. and Reichelt, Matthias and et al.}, year={2023}, collection={SPIE Proceedings} }","mla":"Meier, Torsten, et al. “Experimental Studies of the Excitonic Nonlinear Response of GaAs-Based Type-I and Type-II Quantum Well Structures Interacting with Optical and Terahertz Fields.” Ultrafast Phenomena and Nanophotonics XXVII, vol. 12419, 1241909, SPIE , 2023, doi:10.1117/12.2650291.","ama":"Meier T, Stein M, Schäfer F, et al. Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields. In: Ultrafast Phenomena and Nanophotonics XXVII. Vol 12419. SPIE Proceedings. SPIE ; 2023. doi:10.1117/12.2650291","apa":"Meier, T., Stein, M., Schäfer, F., Anders, D., Littmann, J. H., Fey, M., Trautmann, A., Ngo, C., Steiner, J. T., Reichelt, M., Fuchs, C., Volz, K., & Chatterjee, S. (2023). Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields. Ultrafast Phenomena and Nanophotonics XXVII, 12419, Article 1241909. https://doi.org/10.1117/12.2650291","chicago":"Meier, Torsten, M. Stein, F. Schäfer, D. Anders, J. H. Littmann, M. Fey, Alexander Trautmann, et al. “Experimental Studies of the Excitonic Nonlinear Response of GaAs-Based Type-I and Type-II Quantum Well Structures Interacting with Optical and Terahertz Fields.” In Ultrafast Phenomena and Nanophotonics XXVII, Vol. 12419. SPIE Proceedings. SPIE , 2023. https://doi.org/10.1117/12.2650291.","ieee":"T. Meier et al., “Experimental studies of the excitonic nonlinear response of GaAs-based type-I and type-II quantum well structures interacting with optical and terahertz fields,” in Ultrafast Phenomena and Nanophotonics XXVII, 2023, vol. 12419, doi: 10.1117/12.2650291.","short":"T. Meier, M. Stein, F. Schäfer, D. Anders, J.H. Littmann, M. Fey, A. Trautmann, C. Ngo, J.T. Steiner, M. Reichelt, C. Fuchs, K. Volz, S. Chatterjee, in: Ultrafast Phenomena and Nanophotonics XXVII, SPIE , 2023."},"article_number":"1241909","intvolume":" 12419","_id":"43189","volume":12419,"status":"public","date_created":"2023-03-29T20:15:43Z","author":[{"last_name":"Meier","id":"344","first_name":"Torsten","orcid":"0000-0001-8864-2072","full_name":"Meier, Torsten"},{"full_name":"Stein, M.","first_name":"M.","last_name":"Stein"},{"last_name":"Schäfer","full_name":"Schäfer, F.","first_name":"F."},{"first_name":"D.","full_name":"Anders, D.","last_name":"Anders"},{"full_name":"Littmann, J. H.","first_name":"J. H.","last_name":"Littmann"},{"last_name":"Fey","full_name":"Fey, M.","first_name":"M."},{"full_name":"Trautmann, Alexander","first_name":"Alexander","id":"38163","last_name":"Trautmann"},{"last_name":"Ngo","first_name":"C.","full_name":"Ngo, C."},{"last_name":"Steiner","first_name":"J. T.","full_name":"Steiner, J. T."},{"full_name":"Reichelt, Matthias","first_name":"Matthias","id":"138","last_name":"Reichelt"},{"last_name":"Fuchs","full_name":"Fuchs, C.","first_name":"C."},{"first_name":"K.","full_name":"Volz, K.","last_name":"Volz"},{"full_name":"Chatterjee, S.","first_name":"S.","last_name":"Chatterjee"}],"publisher":"SPIE ","publication":"Ultrafast Phenomena and Nanophotonics XXVII","user_id":"16199","abstract":[{"lang":"eng","text":"The nonlinear optical response of quantum well excitons is investigated experimentally using polarization resolved four wave mixing, optical-pump optical-probe, and optical-pump Terahertz-probe spectroscopy. The four-wave mixing data reveal clear signatures of coherent biexcitons which concur with straight-forward polarization selection rules at the Γ point. The type-I samples show the well-established time-domain beating signatures in the transients as well as the corresponding spectral signatures clearly. The latter are also present in type-II samples; however, the smaller exciton and biexciton binding energies in these structures infer longer beating times which, in turn, are accompanied by faster dephasing of the type-II exciton coherences. Furthermore, the THz absorption following spectrally narrow, picosecond excitation at energies in the vicinity of the 1s exciton resonance are discussed. Here, the optical signatures yield the well-established redshifts and blueshifts for the appropriate polarization geometries in type-I quantum well samples also termed “AC Stark Effect”. The THz probe reveals intriguing spectral features which can be ascribed to coherent negative absorption following an excitation into a virtual state for an excitation below the 1s exciton resonance. Furthermore, the scattering and ionization of excitons is discussed for several excitation geometries yielding control rules for elastic and inelastic quasiparticle collisions."}]},{"intvolume":" 12419","_id":"43191","article_number":"124190G","type":"conference","citation":{"chicago":"Meier, Torsten, C. Ngo, S. Priyadarshi, H. T. Duc, and M. Bieler. “Terahertz-Induced Anomalous Currents Following the Optical Excitation of Excitons in Semiconductor Quantum Wells.” In Ultrafast Phenomena and Nanophotonics XXVII, Vol. 12419. SPIE Proceedings. SPIE, 2023. https://doi.org/10.1117/12.2646022.","ama":"Meier T, Ngo C, Priyadarshi S, Duc HT, Bieler M. Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells. In: Ultrafast Phenomena and Nanophotonics XXVII. Vol 12419. SPIE Proceedings. SPIE; 2023. doi:10.1117/12.2646022","apa":"Meier, T., Ngo, C., Priyadarshi, S., Duc, H. T., & Bieler, M. (2023). Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells. Ultrafast Phenomena and Nanophotonics XXVII, 12419, Article 124190G. https://doi.org/10.1117/12.2646022","bibtex":"@inproceedings{Meier_Ngo_Priyadarshi_Duc_Bieler_2023, series={SPIE Proceedings}, title={Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells}, volume={12419}, DOI={10.1117/12.2646022}, number={124190G}, booktitle={Ultrafast Phenomena and Nanophotonics XXVII}, publisher={SPIE}, author={Meier, Torsten and Ngo, C. and Priyadarshi, S. and Duc, H. T. and Bieler, M.}, year={2023}, collection={SPIE Proceedings} }","mla":"Meier, Torsten, et al. “Terahertz-Induced Anomalous Currents Following the Optical Excitation of Excitons in Semiconductor Quantum Wells.” Ultrafast Phenomena and Nanophotonics XXVII, vol. 12419, 124190G, SPIE, 2023, doi:10.1117/12.2646022.","short":"T. Meier, C. Ngo, S. Priyadarshi, H.T. Duc, M. Bieler, in: Ultrafast Phenomena and Nanophotonics XXVII, SPIE, 2023.","ieee":"T. Meier, C. Ngo, S. Priyadarshi, H. T. Duc, and M. Bieler, “Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells,” in Ultrafast Phenomena and Nanophotonics XXVII, 2023, vol. 12419, doi: 10.1117/12.2646022."},"year":"2023","abstract":[{"text":"Anomalous currents refer to electronic currents that flow perpendicularly to the direction of the accelerating electric field. Such anomalous currents can be generated when Terahertz fields are applied after an optical interband excitation of GaAs quantum wells. The underlying processes are investigated by numerical solutions of the semiconductor Bloch equations in the length gauge. Excitonic effects are included by treating the manybody Coulomb interaction in time-dependent Hartree-Fock approximation and additionally also carrier-phonon scattering processes are considered. The band structure and matrix elements are obtained from a 14-band k · p model within the envelope function approximation. The random phase factors of the matrix elements that appear due to the separate numerical diagonalization at each k-point are treated by applying a smooth gauge transformation. We present the macroscopic Berry curvature and anomalous current transients with and without excitonic effects. It is demonstrated that the resonant optical excitation of excitonic resonances can significantly enhance the Berry curvature and the anomalous currents.","lang":"eng"}],"user_id":"16199","publication":"Ultrafast Phenomena and Nanophotonics XXVII","publisher":"SPIE","author":[{"id":"344","last_name":"Meier","orcid":"0000-0001-8864-2072","full_name":"Meier, Torsten","first_name":"Torsten"},{"first_name":"C.","full_name":"Ngo, C.","last_name":"Ngo"},{"full_name":"Priyadarshi, S.","first_name":"S.","last_name":"Priyadarshi"},{"last_name":"Duc","first_name":"H. T.","full_name":"Duc, H. T."},{"last_name":"Bieler","full_name":"Bieler, M.","first_name":"M."}],"date_created":"2023-03-29T20:25:19Z","status":"public","volume":12419,"date_updated":"2023-04-20T14:40:44Z","doi":"10.1117/12.2646022","series_title":"SPIE Proceedings","language":[{"iso":"eng"}],"title":"Terahertz-induced anomalous currents following the optical excitation of excitons in semiconductor quantum wells","department":[{"_id":"293"},{"_id":"15"},{"_id":"170"},{"_id":"35"},{"_id":"230"}],"publication_status":"published"},{"date_updated":"2023-04-20T14:41:53Z","doi":"10.1117/12.2650169","series_title":"SPIE Proceedings","language":[{"iso":"eng"}],"title":"Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations","department":[{"_id":"293"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"}],"publication_status":"published","intvolume":" 12419","_id":"43190","article_number":"124190A","citation":{"chicago":"Meier, Torsten, Alexander Trautmann, M. Stein, F. Schäfer, D. Anders, C. Ngo, J. T. Steiner, Matthias Reichelt, and S. Chatterjee. “Analysis of the Nonlinear Optical Response of Excitons in Type-I and Type-II Quantum Wells Including Many-Body Correlations.” In Ultrafast Phenomena and Nanophotonics XXVII, Vol. 12419. SPIE Proceedings. SPIE, 2023. https://doi.org/10.1117/12.2650169.","apa":"Meier, T., Trautmann, A., Stein, M., Schäfer, F., Anders, D., Ngo, C., Steiner, J. T., Reichelt, M., & Chatterjee, S. (2023). Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations. Ultrafast Phenomena and Nanophotonics XXVII, 12419, Article 124190A. https://doi.org/10.1117/12.2650169","ama":"Meier T, Trautmann A, Stein M, et al. Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations. In: Ultrafast Phenomena and Nanophotonics XXVII. Vol 12419. SPIE Proceedings. SPIE; 2023. doi:10.1117/12.2650169","mla":"Meier, Torsten, et al. “Analysis of the Nonlinear Optical Response of Excitons in Type-I and Type-II Quantum Wells Including Many-Body Correlations.” Ultrafast Phenomena and Nanophotonics XXVII, vol. 12419, 124190A, SPIE, 2023, doi:10.1117/12.2650169.","bibtex":"@inproceedings{Meier_Trautmann_Stein_Schäfer_Anders_Ngo_Steiner_Reichelt_Chatterjee_2023, series={SPIE Proceedings}, title={Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations}, volume={12419}, DOI={10.1117/12.2650169}, number={124190A}, booktitle={Ultrafast Phenomena and Nanophotonics XXVII}, publisher={SPIE}, author={Meier, Torsten and Trautmann, Alexander and Stein, M. and Schäfer, F. and Anders, D. and Ngo, C. and Steiner, J. T. and Reichelt, Matthias and Chatterjee, S.}, year={2023}, collection={SPIE Proceedings} }","short":"T. Meier, A. Trautmann, M. Stein, F. Schäfer, D. Anders, C. Ngo, J.T. Steiner, M. Reichelt, S. Chatterjee, in: Ultrafast Phenomena and Nanophotonics XXVII, SPIE, 2023.","ieee":"T. Meier et al., “Analysis of the nonlinear optical response of excitons in type-I and type-II quantum wells including many-body correlations,” in Ultrafast Phenomena and Nanophotonics XXVII, 2023, vol. 12419, doi: 10.1117/12.2650169."},"type":"conference","year":"2023","abstract":[{"text":"The nonlinear optical response of quantum well excitons excited by optical fields is analyzed by numerical solutions of the semiconductor Bloch equations. Differential absorption spectra are computed for resonant pumping at the exciton resonance and the dependence of the absorption changes on the polarization directions of the pump and probe pulses is investigated. Coherent biexcitonic many-body correlations are included in our approach up to third-order in the optical fields. Results are presented for spatially-direct type-I and spatiallyindirect type-II quantum well systems. Due to the spatial inhomogeneity, in type-II structures a finite coupling between excitons of opposite spins exists already on the Hartree-Fock level and contributes to the absorption changes for the case of opposite circularly polarized pump and probe pulses.","lang":"eng"}],"user_id":"16199","author":[{"id":"344","last_name":"Meier","full_name":"Meier, Torsten","orcid":"0000-0001-8864-2072","first_name":"Torsten"},{"first_name":"Alexander","full_name":"Trautmann, Alexander","last_name":"Trautmann","id":"38163"},{"full_name":"Stein, M.","first_name":"M.","last_name":"Stein"},{"full_name":"Schäfer, F.","first_name":"F.","last_name":"Schäfer"},{"last_name":"Anders","full_name":"Anders, D.","first_name":"D."},{"last_name":"Ngo","full_name":"Ngo, C.","first_name":"C."},{"full_name":"Steiner, J. T.","first_name":"J. T.","last_name":"Steiner"},{"full_name":"Reichelt, Matthias","first_name":"Matthias","id":"138","last_name":"Reichelt"},{"last_name":"Chatterjee","full_name":"Chatterjee, S.","first_name":"S."}],"publisher":"SPIE","publication":"Ultrafast Phenomena and Nanophotonics XXVII","status":"public","date_created":"2023-03-29T20:22:19Z","volume":12419},{"title":"Gain recovery dynamics in active type-II semiconductor heterostructures","user_id":"16199","author":[{"last_name":"Meier","id":"344","first_name":"Torsten","orcid":"0000-0001-8864-2072","full_name":"Meier, Torsten"},{"last_name":"Schäfer","first_name":"F.","full_name":"Schäfer, F."},{"first_name":"M.","full_name":"Stein, M.","last_name":"Stein"},{"first_name":"J.","full_name":"Lorenz, J.","last_name":"Lorenz"},{"first_name":"F.","full_name":"Dobener, F.","last_name":"Dobener"},{"last_name":"Ngo","first_name":"C.","full_name":"Ngo, C."},{"first_name":"J. T.","full_name":"Steiner, J. T.","last_name":"Steiner"},{"first_name":"C.","full_name":"Fuchs, C.","last_name":"Fuchs"},{"first_name":"W. ","full_name":"Stolz, W. ","last_name":"Stolz"},{"last_name":"Volz","full_name":"Volz, K.","first_name":"K."},{"last_name":"Hader","full_name":"Hader, J.","first_name":"J."},{"first_name":"J.V.","full_name":"Moloney, J.V.","last_name":"Moloney"},{"full_name":"Koch, S.W.","first_name":"S.W.","last_name":"Koch"},{"last_name":"Chatterjee","first_name":"S.","full_name":"Chatterjee, S."}],"department":[{"_id":"293"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"}],"publication":"Applied Physics Letters","volume":122,"publication_status":"published","status":"public","date_created":"2023-03-28T21:18:20Z","_id":"43139","intvolume":" 122","date_updated":"2023-04-20T14:43:15Z","article_number":"082104","doi":"10.1063/5.0128777","issue":"8","type":"journal_article","year":"2023","citation":{"ieee":"T. Meier et al., “Gain recovery dynamics in active type-II semiconductor heterostructures,” Applied Physics Letters, vol. 122, no. 8, Art. no. 082104, 2023, doi: 10.1063/5.0128777.","short":"T. Meier, F. Schäfer, M. Stein, J. Lorenz, F. Dobener, C. Ngo, J.T. Steiner, C. Fuchs, W. Stolz, K. Volz, J. Hader, J.V. Moloney, S.W. Koch, S. Chatterjee, Applied Physics Letters 122 (2023).","bibtex":"@article{Meier_Schäfer_Stein_Lorenz_Dobener_Ngo_Steiner_Fuchs_Stolz_Volz_et al._2023, title={Gain recovery dynamics in active type-II semiconductor heterostructures}, volume={122}, DOI={10.1063/5.0128777}, number={8082104}, journal={Applied Physics Letters}, author={Meier, Torsten and Schäfer, F. and Stein, M. and Lorenz, J. and Dobener, F. and Ngo, C. and Steiner, J. T. and Fuchs, C. and Stolz, W. and Volz, K. and et al.}, year={2023} }","mla":"Meier, Torsten, et al. “Gain Recovery Dynamics in Active Type-II Semiconductor Heterostructures.” Applied Physics Letters, vol. 122, no. 8, 082104, 2023, doi:10.1063/5.0128777.","chicago":"Meier, Torsten, F. Schäfer, M. Stein, J. Lorenz, F. Dobener, C. Ngo, J. T. Steiner, et al. “Gain Recovery Dynamics in Active Type-II Semiconductor Heterostructures.” Applied Physics Letters 122, no. 8 (2023). https://doi.org/10.1063/5.0128777.","ama":"Meier T, Schäfer F, Stein M, et al. Gain recovery dynamics in active type-II semiconductor heterostructures. Applied Physics Letters. 2023;122(8). doi:10.1063/5.0128777","apa":"Meier, T., Schäfer, F., Stein, M., Lorenz, J., Dobener, F., Ngo, C., Steiner, J. T., Fuchs, C., Stolz, W., Volz, K., Hader, J., Moloney, J. V., Koch, S. W., & Chatterjee, S. (2023). Gain recovery dynamics in active type-II semiconductor heterostructures. Applied Physics Letters, 122(8), Article 082104. https://doi.org/10.1063/5.0128777"},"language":[{"iso":"eng"}]},{"status":"public","date_created":"2023-03-28T12:45:46Z","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"_id":"59","name":"TRR 142 - A02: TRR 142 - Subproject A02"},{"name":"TRR 142 - A10: TRR 142 - Subproject A10","_id":"165"}],"author":[{"first_name":"Torsten","full_name":"Meier, Torsten","orcid":"0000-0001-8864-2072","last_name":"Meier","id":"344"},{"first_name":"S.","full_name":"Grisard, S.","last_name":"Grisard"},{"last_name":"Trifonov","first_name":"A.V.","full_name":"Trifonov, A.V."},{"id":"55958","last_name":"Rose","full_name":"Rose, Hendrik","orcid":"0000-0002-3079-5428","first_name":"Hendrik"},{"last_name":"Reichhardt","first_name":"R.","full_name":"Reichhardt, R."},{"full_name":"Reichelt, Matthias","first_name":"Matthias","id":"138","last_name":"Reichelt"},{"last_name":"Schneider","full_name":"Schneider, C.","first_name":"C."},{"last_name":"Kamp","full_name":"Kamp, M.","first_name":"M."},{"full_name":"Höfling, S.","first_name":"S.","last_name":"Höfling"},{"last_name":"Bayer","full_name":"Bayer, M.","first_name":"M."},{"last_name":"Akimov","first_name":"I.A","full_name":"Akimov, I.A"}],"publication":"arxiv:2302.02480","department":[{"_id":"293"},{"_id":"35"},{"_id":"15"},{"_id":"170"},{"_id":"230"},{"_id":"429"}],"title":"Temporal sorting of optical multi-wave-mixing processes in semiconductor quantum dots","user_id":"16199","type":"preprint","citation":{"short":"T. 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Published online 2023.","bibtex":"@article{Meier_Grisard_Trifonov_Rose_Reichhardt_Reichelt_Schneider_Kamp_Höfling_Bayer_et al._2023, title={Temporal sorting of optical multi-wave-mixing processes in semiconductor quantum dots}, journal={arxiv:2302.02480}, author={Meier, Torsten and Grisard, S. and Trifonov, A.V. and Rose, Hendrik and Reichhardt, R. and Reichelt, Matthias and Schneider, C. and Kamp, M. and Höfling, S. and Bayer, M. and et al.}, year={2023} }","mla":"Meier, Torsten, et al. “Temporal Sorting of Optical Multi-Wave-Mixing Processes in Semiconductor Quantum Dots.” Arxiv:2302.02480, 2023."},"year":"2023","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.48550/arXiv.2302.02480"}],"oa":"1","_id":"43132","date_updated":"2023-04-20T14:45:05Z"},{"publication_status":"published","publication_identifier":{"issn":["2469-9926","2469-9934"]},"project":[{"name":"TRR 142: TRR 142","_id":"53"},{"_id":"56","name":"TRR 142 - C: TRR 142 - Project Area C"},{"_id":"174","name":"TRR 142 - C10: TRR 142 - Subproject C10"}],"department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"},{"_id":"35"}],"title":"Entanglement of particles versus entanglement of fields: Independent quantum resources","language":[{"iso":"eng"}],"doi":"10.1103/physreva.107.042420","date_updated":"2023-04-20T15:03:33Z","volume":107,"status":"public","date_created":"2023-04-18T06:55:59Z","author":[{"first_name":"Jan","full_name":"Sperling, Jan","orcid":"0000-0002-5844-3205","last_name":"Sperling","id":"75127"},{"last_name":"Agudelo","full_name":"Agudelo, Elizabeth","first_name":"Elizabeth"}],"publisher":"American Physical Society (APS)","publication":"Physical Review A","user_id":"16199","citation":{"ama":"Sperling J, Agudelo E. 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Agudelo, “Entanglement of particles versus entanglement of fields: Independent quantum resources,” Physical Review A, vol. 107, no. 4, Art. no. 042420, 2023, doi: 10.1103/physreva.107.042420."},"type":"journal_article","year":"2023","article_number":"042420","issue":"4","_id":"44050","intvolume":" 107"},{"project":[{"_id":"53","name":"TRR 142: TRR 142"}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"publication_status":"published","department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"},{"_id":"35"}],"title":"Detector entanglement: Quasidistributions for Bell-state measurements","language":[{"iso":"eng"}],"doi":"10.1103/physreva.107.012426","date_updated":"2023-04-20T15:16:38Z","date_created":"2023-01-27T08:43:45Z","status":"public","volume":107,"publication":"Physical Review A","publisher":"American Physical Society (APS)","author":[{"last_name":"Sperling","id":"75127","first_name":"Jan","orcid":"0000-0002-5844-3205","full_name":"Sperling, Jan"},{"full_name":"Gianani, Ilaria","first_name":"Ilaria","last_name":"Gianani"},{"last_name":"Barbieri","full_name":"Barbieri, Marco","first_name":"Marco"},{"full_name":"Agudelo, Elizabeth","first_name":"Elizabeth","last_name":"Agudelo"}],"user_id":"16199","year":"2023","type":"journal_article","citation":{"bibtex":"@article{Sperling_Gianani_Barbieri_Agudelo_2023, title={Detector entanglement: Quasidistributions for Bell-state measurements}, volume={107}, DOI={10.1103/physreva.107.012426}, number={1012426}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Sperling, Jan and Gianani, Ilaria and Barbieri, Marco and Agudelo, Elizabeth}, year={2023} }","mla":"Sperling, Jan, et al. “Detector Entanglement: Quasidistributions for Bell-State Measurements.” Physical Review A, vol. 107, no. 1, 012426, American Physical Society (APS), 2023, doi:10.1103/physreva.107.012426.","chicago":"Sperling, Jan, Ilaria Gianani, Marco Barbieri, and Elizabeth Agudelo. “Detector Entanglement: Quasidistributions for Bell-State Measurements.” Physical Review A 107, no. 1 (2023). https://doi.org/10.1103/physreva.107.012426.","ama":"Sperling J, Gianani I, Barbieri M, Agudelo E. Detector entanglement: Quasidistributions for Bell-state measurements. Physical Review A. 2023;107(1). doi:10.1103/physreva.107.012426","apa":"Sperling, J., Gianani, I., Barbieri, M., & Agudelo, E. (2023). Detector entanglement: Quasidistributions for Bell-state measurements. Physical Review A, 107(1), Article 012426. https://doi.org/10.1103/physreva.107.012426","ieee":"J. Sperling, I. Gianani, M. Barbieri, and E. Agudelo, “Detector entanglement: Quasidistributions for Bell-state measurements,” Physical Review A, vol. 107, no. 1, Art. no. 012426, 2023, doi: 10.1103/physreva.107.012426.","short":"J. Sperling, I. Gianani, M. Barbieri, E. Agudelo, Physical Review A 107 (2023)."},"issue":"1","article_number":"012426","_id":"40477","intvolume":" 107"},{"doi":"10.1103/physrevlett.130.113601","date_updated":"2023-04-20T15:28:42Z","language":[{"iso":"eng"}],"title":"Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"},{"_id":"174","name":"TRR 142 - C10: TRR 142 - Subproject C10"},{"name":"TRR 142 - C09: TRR 142 - Subproject C09","_id":"173"}],"publication_status":"published","publication_identifier":{"issn":["0031-9007","1079-7114"]},"department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"},{"_id":"230"},{"_id":"35"},{"_id":"297"}],"issue":"11","article_number":"113601","_id":"42973","intvolume":" 130","citation":{"short":"C. Lüders, M. Pukrop, F. Barkhausen, E. Rozas, C. Schneider, S. Höfling, J. Sperling, S. Schumacher, M. Aßmann, Physical Review Letters 130 (2023).","ieee":"C. Lüders et al., “Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography,” Physical Review Letters, vol. 130, no. 11, Art. no. 113601, 2023, doi: 10.1103/physrevlett.130.113601.","apa":"Lüders, C., Pukrop, M., Barkhausen, F., Rozas, E., Schneider, C., Höfling, S., Sperling, J., Schumacher, S., & Aßmann, M. (2023). Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography. Physical Review Letters, 130(11), Article 113601. https://doi.org/10.1103/physrevlett.130.113601","ama":"Lüders C, Pukrop M, Barkhausen F, et al. Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography. Physical Review Letters. 2023;130(11). doi:10.1103/physrevlett.130.113601","chicago":"Lüders, Carolin, Matthias Pukrop, Franziska Barkhausen, Elena Rozas, Christian Schneider, Sven Höfling, Jan Sperling, Stefan Schumacher, and Marc Aßmann. “Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography.” Physical Review Letters 130, no. 11 (2023). https://doi.org/10.1103/physrevlett.130.113601.","bibtex":"@article{Lüders_Pukrop_Barkhausen_Rozas_Schneider_Höfling_Sperling_Schumacher_Aßmann_2023, title={Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography}, volume={130}, DOI={10.1103/physrevlett.130.113601}, number={11113601}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Lüders, Carolin and Pukrop, Matthias and Barkhausen, Franziska and Rozas, Elena and Schneider, Christian and Höfling, Sven and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}, year={2023} }","mla":"Lüders, Carolin, et al. “Tracking Quantum Coherence in Polariton Condensates with Time-Resolved Tomography.” Physical Review Letters, vol. 130, no. 11, 113601, American Physical Society (APS), 2023, doi:10.1103/physrevlett.130.113601."},"year":"2023","type":"journal_article","user_id":"16199","article_type":"letter_note","status":"public","date_created":"2023-03-14T07:50:56Z","volume":130,"publisher":"American Physical Society (APS)","author":[{"full_name":"Lüders, Carolin","first_name":"Carolin","last_name":"Lüders"},{"full_name":"Pukrop, Matthias","first_name":"Matthias","id":"64535","last_name":"Pukrop"},{"last_name":"Barkhausen","id":"63631","first_name":"Franziska","full_name":"Barkhausen, Franziska"},{"last_name":"Rozas","full_name":"Rozas, Elena","first_name":"Elena"},{"first_name":"Christian","full_name":"Schneider, Christian","last_name":"Schneider"},{"last_name":"Höfling","full_name":"Höfling, Sven","first_name":"Sven"},{"last_name":"Sperling","id":"75127","first_name":"Jan","orcid":"0000-0002-5844-3205","full_name":"Sperling, Jan"},{"orcid":"0000-0003-4042-4951","full_name":"Schumacher, Stefan","first_name":"Stefan","id":"27271","last_name":"Schumacher"},{"last_name":"Aßmann","first_name":"Marc","full_name":"Aßmann, Marc"}],"keyword":["General Physics and Astronomy"],"publication":"Physical Review Letters"},{"status":"public","project":[{"name":"SFB 901: SFB 901","_id":"1"},{"_id":"2","name":"SFB 901 - A: SFB 901 - Project Area A"},{"name":"SFB 901 - A3: SFB 901 - Subproject A3","_id":"7"}],"date_created":"2023-04-20T17:02:41Z","jel":["I11","D43","C91"],"author":[{"first_name":"Jeannette","full_name":"Brosig-Koch, Jeannette","last_name":"Brosig-Koch"},{"id":"37339","last_name":"Hehenkamp","full_name":"Hehenkamp, Burkhard","first_name":"Burkhard"},{"last_name":"Kokot","first_name":"Johanna","full_name":"Kokot, Johanna"}],"quality_controlled":"1","publication":"Health Economics","keyword":["physician competition","patient characteristics","heterogeneity in quality responses","fee-for-service","laboratory experiment"],"department":[{"_id":"280"},{"_id":"475"}],"user_id":"37339","title":"Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics","article_type":"original","abstract":[{"text":"We study how competition between physicians affects the provision of medical care. In\r\nour theoretical model, physicians are faced with a heterogeneous patient population, in which patients\r\nsystematically vary with regard to both their responsiveness to the provided quality of care and their\r\nstate of health. We test the behavioral predictions derived from this model in a controlled laboratory\r\nexperiment. In line with the model, we observe that competition significantly improves patient benefits\r\nas long as patients are able to respond to the quality provided. For those patients, who are not able\r\nto choose a physician, competition even decreases the patient benefit compared to a situation without\r\ncompetition. This decrease is in contrast to our theoretical prediction implying no change in benefits for\r\npassive patients. Deviations from patient-optimal treatment are highest for passive patients in need of\r\na low quantity of medical services. With repetition, both, the positive effects of competition for active\r\npatients as well as the negative effects of competition for passive patients become more pronounced. Our\r\nresults imply that competition can not only improve but also worsen patient outcome and that patients’\r\nresponsiveness to quality is decisive.","lang":"eng"}],"language":[{"iso":"eng"}],"citation":{"ieee":"J. Brosig-Koch, B. Hehenkamp, and J. Kokot, “Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics,” Health Economics, 2023, doi: 10.1002/hec.4689.","short":"J. Brosig-Koch, B. Hehenkamp, J. Kokot, Health Economics (2023).","mla":"Brosig-Koch, Jeannette, et al. “Who Benefits from Quality Competition in Health Care? A Theory and a Laboratory Experiment on the Relevance of Patient Characteristics.” Health Economics, 2023, doi:10.1002/hec.4689.","bibtex":"@article{Brosig-Koch_Hehenkamp_Kokot_2023, title={Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics}, DOI={10.1002/hec.4689}, journal={Health Economics}, author={Brosig-Koch, Jeannette and Hehenkamp, Burkhard and Kokot, Johanna}, year={2023} }","chicago":"Brosig-Koch, Jeannette, Burkhard Hehenkamp, and Johanna Kokot. “Who Benefits from Quality Competition in Health Care? A Theory and a Laboratory Experiment on the Relevance of Patient Characteristics.” Health Economics, 2023. https://doi.org/10.1002/hec.4689.","ama":"Brosig-Koch J, Hehenkamp B, Kokot J. Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics. Health Economics. Published online 2023. doi:10.1002/hec.4689","apa":"Brosig-Koch, J., Hehenkamp, B., & Kokot, J. (2023). Who benefits from quality competition in health care? A theory and a laboratory experiment on the relevance of patient characteristics. Health Economics. https://doi.org/10.1002/hec.4689"},"year":"2023","type":"journal_article","doi":"10.1002/hec.4689","date_updated":"2023-04-20T17:16:14Z","_id":"44092"},{"date_updated":"2023-04-20T17:16:24Z","_id":"44093","language":[{"iso":"eng"}],"citation":{"mla":"Hehenkamp, Burkhard, and Oddvar M. Kaarbøe. Price Regulation, Quality Competition and Location Choice with Costly Relocation.","bibtex":"@book{Hehenkamp_Kaarbøe, title={Price Regulation, Quality Competition and Location Choice with Costly Relocation}, author={Hehenkamp, Burkhard and Kaarbøe, Oddvar M.} }","apa":"Hehenkamp, B., & Kaarbøe, O. M. (n.d.). Price Regulation, Quality Competition and Location Choice with Costly Relocation.","ama":"Hehenkamp B, Kaarbøe OM. Price Regulation, Quality Competition and Location Choice with Costly Relocation.","chicago":"Hehenkamp, Burkhard, and Oddvar M. Kaarbøe. Price Regulation, Quality Competition and Location Choice with Costly Relocation, n.d.","ieee":"B. Hehenkamp and O. M. Kaarbøe, Price Regulation, Quality Competition and Location Choice with Costly Relocation. .","short":"B. Hehenkamp, O.M. Kaarbøe, Price Regulation, Quality Competition and Location Choice with Costly Relocation, n.d."},"type":"report","year":"2023","user_id":"37339","title":"Price Regulation, Quality Competition and Location Choice with Costly Relocation","abstract":[{"text":"We consider a model where for-profit providers compete in quality in a price-regulated market that has been opened to competition, and where the incumbent is located at the center of the market, facing high costs of relocation. The model is relevant in markets such as public health care, education and schooling, or postal services. We find that, when the regulated price is low or intermediate, the entrant strategically locates towards the corner of the market to keep the incumbent at the low monopoly quality level. For a high price, the entrant locates at the corner of the market and both providers implement higher quality compared to a monopoly. In any case, the entrant implements higher quality than the incumbent provider. Social welfare is always higher in a duopoly if the cost of quality is low. For higher cost levels welfare is non-monotonic in the price and it can be optimal to the regulator not to use its entire budget. Therefore, the welfare effect of entry depends on the price and the size of the entry cost, and the regulator should condition the decision to allow entry on an assessment of the entry cost.","lang":"eng"}],"date_created":"2023-04-20T17:12:18Z","project":[{"name":"SFB 901: SFB 901","_id":"1"},{"_id":"2","name":"SFB 901 - A: SFB 901 - Project Area A"},{"name":"SFB 901 - A3: SFB 901 - Subproject A3","_id":"7"}],"status":"public","publication_status":"submitted","jel":["D43","L13","L51"],"keyword":["Quality competition","Price regulation","Location choice","Product differentiation"],"department":[{"_id":"280"},{"_id":"475"}],"author":[{"full_name":"Hehenkamp, Burkhard","first_name":"Burkhard","id":"37339","last_name":"Hehenkamp"},{"last_name":"Kaarbøe","first_name":"Oddvar M.","full_name":"Kaarbøe, Oddvar M."}]},{"page":"97","year":"2023","citation":{"chicago":"Hähnel, David, Christian Golla, Maximilian Albert, Thomas Zentgraf, Viktor Myroshnychenko, Jens Förstner, and Cedrik Meier. “A Multi-Mode Super-Fano Mechanism for Enhanced Third Harmonic Generation in Silicon Metasurfaces.” Light: Science & Applications 12, no. 1 (2023): 97. https://doi.org/10.1038/s41377-023-01134-1.","apa":"Hähnel, D., Golla, C., Albert, M., Zentgraf, T., Myroshnychenko, V., Förstner, J., & Meier, C. (2023). A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces. Light: Science & Applications, 12(1), 97. https://doi.org/10.1038/s41377-023-01134-1","ama":"Hähnel D, Golla C, Albert M, et al. A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces. 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Meier, Light: Science & Applications 12 (2023) 97.","ieee":"D. Hähnel et al., “A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces,” Light: Science & Applications, vol. 12, no. 1, p. 97, 2023, doi: https://doi.org/10.1038/s41377-023-01134-1."},"type":"journal_article","intvolume":" 12","_id":"44097","issue":"1","file":[{"access_level":"open_access","file_name":"2023-04 Hähnel - LSA - Multimode Fano THG.pdf","date_created":"2023-04-21T10:00:27Z","date_updated":"2023-04-21T10:00:27Z","content_type":"application/pdf","relation":"main_file","file_size":2088874,"creator":"fossie","file_id":"44098"},{"relation":"supplementary_material","content_type":"application/pdf","date_updated":"2023-04-21T10:03:30Z","file_id":"44099","creator":"fossie","file_size":986743,"access_level":"open_access","file_name":"2023-04 Hähnel - LSA - Multimode Fano THG (supplementary information).pdf","date_created":"2023-04-21T10:03:30Z"}],"publication":"Light: Science & Applications","keyword":["tet_topic_meta"],"file_date_updated":"2023-04-21T10:03:30Z","author":[{"last_name":"Hähnel","first_name":"David","full_name":"Hähnel, David"},{"full_name":"Golla, Christian","first_name":"Christian","last_name":"Golla"},{"last_name":"Albert","first_name":"Maximilian","full_name":"Albert, Maximilian"},{"id":"30525","last_name":"Zentgraf","orcid":"0000-0002-8662-1101","full_name":"Zentgraf, Thomas","first_name":"Thomas"},{"id":"46371","last_name":"Myroshnychenko","full_name":"Myroshnychenko, Viktor","first_name":"Viktor"},{"full_name":"Förstner, Jens","orcid":"0000-0001-7059-9862","first_name":"Jens","id":"158","last_name":"Förstner"},{"id":"20798","last_name":"Meier","full_name":"Meier, Cedrik","orcid":"https://orcid.org/0000-0002-3787-3572","first_name":"Cedrik"}],"publisher":"Springer Nature","quality_controlled":"1","date_created":"2023-04-21T09:45:07Z","status":"public","has_accepted_license":"1","volume":12,"abstract":[{"text":"We present strong enhancement of third harmonic generation in an amorphous silicon metasurface consisting of elliptical nano resonators. We show that this enhancement originates from a new type of multi-mode Fano mechanism. These ‘Super-Fano’ resonances are investigated numerically in great detail using full-wave simulations. The theoretically predicted behavior of the metasurface is experimentally verified by linear and nonlinear transmission spectroscopy. Moreover, quantitative nonlinear measurements are performed, in which an absolute conversion efficiency as high as ηmax ≈ 2.8 × 10−7 a peak power intensity of 1.2 GW cm−2 is found. Compared to an unpatterned silicon film of the same thickness amplification factors of up to ~900 are demonstrated. Our results pave the way to exploiting a strong Fano-type multi-mode coupling in metasurfaces for high THG in potential applications.","lang":"eng"}],"article_type":"original","user_id":"158","ddc":["530"],"language":[{"iso":"eng"}],"date_updated":"2023-04-21T10:04:05Z","oa":"1","doi":"https://doi.org/10.1038/s41377-023-01134-1","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"publication_identifier":{"issn":["2047-7538"]},"publication_status":"published","title":"A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces"},{"user_id":"88252","status":"public","date_created":"2023-04-20T08:59:14Z","volume":51,"author":[{"first_name":"Marten","full_name":"Maack, Marten","last_name":"Maack"}],"publisher":"Elsevier BV","publication":"Operations Research Letters","keyword":["Applied Mathematics","Industrial and Manufacturing Engineering","Management Science and Operations Research","Software"],"issue":"3","_id":"44077","intvolume":" 51","year":"2023","type":"journal_article","citation":{"short":"M. 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