[{"intvolume":" 110","citation":{"chicago":"Krishnaswamy, Suchitra, Fabian Schlue, L. Ares, V. Dyachuk, Michael Stefszky, Benjamin Brecht, Christine Silberhorn, and Jan Sperling. “Experimental Retrieval of Photon Statistics from Click Detection.” Physical Review A 110, no. 2 (2024). https://doi.org/10.1103/physreva.110.023717.","ieee":"S. Krishnaswamy et al., “Experimental retrieval of photon statistics from click detection,” Physical Review A, vol. 110, no. 2, Art. no. 023717, 2024, doi: 10.1103/physreva.110.023717.","ama":"Krishnaswamy S, Schlue F, Ares L, et al. Experimental retrieval of photon statistics from click detection. Physical Review A. 2024;110(2). doi:10.1103/physreva.110.023717","mla":"Krishnaswamy, Suchitra, et al. “Experimental Retrieval of Photon Statistics from Click Detection.” Physical Review A, vol. 110, no. 2, 023717, American Physical Society (APS), 2024, doi:10.1103/physreva.110.023717.","bibtex":"@article{Krishnaswamy_Schlue_Ares_Dyachuk_Stefszky_Brecht_Silberhorn_Sperling_2024, title={Experimental retrieval of photon statistics from click detection}, volume={110}, DOI={10.1103/physreva.110.023717}, number={2023717}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Krishnaswamy, Suchitra and Schlue, Fabian and Ares, L. and Dyachuk, V. and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Sperling, Jan}, year={2024} }","short":"S. Krishnaswamy, F. Schlue, L. Ares, V. Dyachuk, M. Stefszky, B. Brecht, C. Silberhorn, J. Sperling, Physical Review A 110 (2024).","apa":"Krishnaswamy, S., Schlue, F., Ares, L., Dyachuk, V., Stefszky, M., Brecht, B., Silberhorn, C., & Sperling, J. (2024). Experimental retrieval of photon statistics from click detection. Physical Review A, 110(2), Article 023717. https://doi.org/10.1103/physreva.110.023717"},"year":"2024","issue":"2","publication_identifier":{"issn":["2469-9926","2469-9934"]},"publication_status":"published","doi":"10.1103/physreva.110.023717","title":"Experimental retrieval of photon statistics from click detection","volume":110,"author":[{"last_name":"Krishnaswamy","id":"78347","full_name":"Krishnaswamy, Suchitra","first_name":"Suchitra"},{"first_name":"Fabian","last_name":"Schlue","full_name":"Schlue, Fabian","id":"63579"},{"full_name":"Ares, L.","last_name":"Ares","first_name":"L."},{"last_name":"Dyachuk","full_name":"Dyachuk, V.","first_name":"V."},{"last_name":"Stefszky","full_name":"Stefszky, Michael","id":"42777","first_name":"Michael"},{"orcid":"0000-0003-4140-0556 ","last_name":"Brecht","id":"27150","full_name":"Brecht, Benjamin","first_name":"Benjamin"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"full_name":"Sperling, Jan","id":"75127","last_name":"Sperling","orcid":"0000-0002-5844-3205","first_name":"Jan"}],"date_created":"2024-12-11T15:33:08Z","publisher":"American Physical Society (APS)","date_updated":"2024-12-11T15:35:07Z","status":"public","publication":"Physical Review A","type":"journal_article","language":[{"iso":"eng"}],"article_number":"023717","department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"},{"_id":"623"}],"user_id":"75127","_id":"57743"},{"publication":"ACS Photonics","type":"journal_article","status":"public","_id":"58092","project":[{"_id":"63","name":"TRR 142 - A06: TRR 142 - Ultraschnelle Akustik zur Modulation von Lichtemission (A06)","grant_number":"231447078"}],"department":[{"_id":"429"}],"user_id":"94792","extern":"1","language":[{"iso":"eng"}],"publication_status":"published","issue":"3","year":"2024","intvolume":" 11","citation":{"ama":"Carr AD, Ruppert C, Samusev AK, et al. Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities. ACS Photonics. 2024;11(3). doi:10.1021/acsphotonics.3c01601","ieee":"A. D. Carr et al., “Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities,” ACS Photonics, vol. 11, no. 3, 2024, doi: 10.1021/acsphotonics.3c01601.","chicago":"Carr, Alex D. , Claudia Ruppert, Anton K. Samusev, Giulia Magnabosco, Nicolas Vogel, Tetiana L. Linnik, Andrew W. Rushforth, Manfred Bayer, Alexey V. Scherbakov, and Andrey V. Akimov. “Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities.” ACS Photonics 11, no. 3 (2024). https://doi.org/10.1021/acsphotonics.3c01601.","apa":"Carr, A. D., Ruppert, C., Samusev, A. K., Magnabosco, G., Vogel, N., Linnik, T. L., Rushforth, A. W., Bayer, M., Scherbakov, A. V., & Akimov, A. V. (2024). Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities. ACS Photonics, 11(3). https://doi.org/10.1021/acsphotonics.3c01601","mla":"Carr, Alex D., et al. “Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities.” ACS Photonics, vol. 11, no. 3, 2024, doi:10.1021/acsphotonics.3c01601.","short":"A.D. Carr, C. Ruppert, A.K. Samusev, G. Magnabosco, N. Vogel, T.L. Linnik, A.W. Rushforth, M. Bayer, A.V. Scherbakov, A.V. Akimov, ACS Photonics 11 (2024).","bibtex":"@article{Carr_Ruppert_Samusev_Magnabosco_Vogel_Linnik_Rushforth_Bayer_Scherbakov_Akimov_2024, title={Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities}, volume={11}, DOI={10.1021/acsphotonics.3c01601}, number={3}, journal={ACS Photonics}, author={Carr, Alex D. and Ruppert, Claudia and Samusev, Anton K. and Magnabosco, Giulia and Vogel, Nicolas and Linnik, Tetiana L. and Rushforth, Andrew W. and Bayer, Manfred and Scherbakov, Alexey V. and Akimov, Andrey V. }, year={2024} }"},"oa":"1","date_updated":"2025-01-07T16:17:22Z","volume":11,"date_created":"2025-01-07T16:17:04Z","author":[{"first_name":"Alex D. ","last_name":"Carr","full_name":"Carr, Alex D. "},{"first_name":"Claudia ","last_name":"Ruppert","full_name":"Ruppert, Claudia "},{"first_name":"Anton K. ","full_name":"Samusev, Anton K. ","last_name":"Samusev"},{"last_name":"Magnabosco","full_name":"Magnabosco, Giulia ","first_name":"Giulia "},{"first_name":"Nicolas ","full_name":"Vogel, Nicolas ","last_name":"Vogel"},{"last_name":"Linnik","full_name":"Linnik, Tetiana L. ","first_name":"Tetiana L. "},{"first_name":"Andrew W. ","last_name":"Rushforth","full_name":"Rushforth, Andrew W. "},{"last_name":"Bayer","full_name":"Bayer, Manfred ","first_name":"Manfred "},{"last_name":"Scherbakov","full_name":"Scherbakov, Alexey V. ","first_name":"Alexey V. "},{"first_name":"Andrey V. ","last_name":"Akimov","full_name":"Akimov, Andrey V. "}],"title":"Enhanced Photon–Phonon Interaction in WSe2 Acoustic Nanocavities","doi":"10.1021/acsphotonics.3c01601","main_file_link":[{"url":"https://pubs.acs.org/doi/10.1021/acsphotonics.3c01601","open_access":"1"}]},{"date_created":"2025-09-12T11:08:59Z","publisher":"AIP Publishing","title":"Time-bin entanglement in the deterministic generation of linear photonic cluster states","issue":"3","year":"2024","language":[{"iso":"eng"}],"publication":"APL Quantum","abstract":[{"lang":"eng","text":"We theoretically investigate strategies for the deterministic creation of trains of time-bin entangled photons using an individual quantum emitter described by a Λ-type electronic system. We explicitly demonstrate the theoretical generation of linear cluster states with substantial numbers of entangled photonic qubits in full microscopic numerical simulations. The underlying scheme is based on the manipulation of ground state coherences through precise optical driving. One important finding is that the most easily accessible quality metrics, the achievable rotation fidelities, fall short in assessing the actual quantum correlations of the emitted photons in the face of losses. To address this, we explicitly calculate stabilizer generator expectation values as a superior gauge for the quantum properties of the generated many-photon state. With widespread applicability in other emitter and excitation–emission schemes also, our work lays the conceptual foundations for an in-depth practical analysis of time-bin entanglement based on full numerical simulations with predictive capabilities for realistic systems and setups, including losses and imperfections. The specific results shown in the present work illustrate that with controlled minimization of losses and realistic system parameters for quantum-dot type systems, useful linear cluster states of significant lengths can be generated in the calculations, discussing the possibility of scalability for quantum information processing endeavors."}],"volume":1,"author":[{"last_name":"Bauch","full_name":"Bauch, David","first_name":"David"},{"first_name":"Nikolas","last_name":"Köcher","full_name":"Köcher, Nikolas","id":"79191"},{"last_name":"Heinisch","orcid":"0009-0006-0984-2097","id":"90283","full_name":"Heinisch, Nils","first_name":"Nils"},{"first_name":"Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher","id":"27271","full_name":"Schumacher, Stefan"}],"date_updated":"2025-09-12T11:11:32Z","doi":"10.1063/5.0214197","publication_identifier":{"issn":["2835-0103"]},"publication_status":"published","intvolume":" 1","citation":{"ama":"Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic generation of linear photonic cluster states. APL Quantum. 2024;1(3). doi:10.1063/5.0214197","chicago":"Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” APL Quantum 1, no. 3 (2024). https://doi.org/10.1063/5.0214197.","ieee":"D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement in the deterministic generation of linear photonic cluster states,” APL Quantum, vol. 1, no. 3, Art. no. 036110, 2024, doi: 10.1063/5.0214197.","bibtex":"@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement in the deterministic generation of linear photonic cluster states}, volume={1}, DOI={10.1063/5.0214197}, number={3036110}, journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher, Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }","mla":"Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” APL Quantum, vol. 1, no. 3, 036110, AIP Publishing, 2024, doi:10.1063/5.0214197.","short":"D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).","apa":"Bauch, D., Köcher, N., Heinisch, N., & Schumacher, S. (2024). Time-bin entanglement in the deterministic generation of linear photonic cluster states. APL Quantum, 1(3), Article 036110. https://doi.org/10.1063/5.0214197"},"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"35"},{"_id":"230"},{"_id":"27"},{"_id":"429"},{"_id":"623"}],"user_id":"16199","_id":"61251","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen","_id":"173"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"}],"article_number":"036110","type":"journal_article","status":"public"},{"year":"2024","intvolume":" 6","citation":{"ieee":"N. Heinisch, N. Köcher, D. Bauch, and S. Schumacher, “Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs,” Physical Review Research, vol. 6, no. 1, Art. no. L012017, 2024, doi: 10.1103/physrevresearch.6.l012017.","chicago":"Heinisch, Nils, Nikolas Köcher, David Bauch, and Stefan Schumacher. “Swing-up Dynamics in Quantum Emitter Cavity Systems: Near Ideal Single Photons and Entangled Photon Pairs.” Physical Review Research 6, no. 1 (2024). https://doi.org/10.1103/physrevresearch.6.l012017.","ama":"Heinisch N, Köcher N, Bauch D, Schumacher S. Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs. Physical Review Research. 2024;6(1). doi:10.1103/physrevresearch.6.l012017","bibtex":"@article{Heinisch_Köcher_Bauch_Schumacher_2024, title={Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs}, volume={6}, DOI={10.1103/physrevresearch.6.l012017}, number={1L012017}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Heinisch, Nils and Köcher, Nikolas and Bauch, David and Schumacher, Stefan}, year={2024} }","mla":"Heinisch, Nils, et al. “Swing-up Dynamics in Quantum Emitter Cavity Systems: Near Ideal Single Photons and Entangled Photon Pairs.” Physical Review Research, vol. 6, no. 1, L012017, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.l012017.","short":"N. Heinisch, N. Köcher, D. Bauch, S. Schumacher, Physical Review Research 6 (2024).","apa":"Heinisch, N., Köcher, N., Bauch, D., & Schumacher, S. (2024). Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs. Physical Review Research, 6(1), Article L012017. https://doi.org/10.1103/physrevresearch.6.l012017"},"publication_identifier":{"issn":["2643-1564"]},"publication_status":"published","issue":"1","title":"Swing-up dynamics in quantum emitter cavity systems: Near ideal single photons and entangled photon pairs","doi":"10.1103/physrevresearch.6.l012017","publisher":"American Physical Society (APS)","date_updated":"2025-09-12T11:18:05Z","volume":6,"date_created":"2025-09-12T11:16:31Z","author":[{"first_name":"Nils","last_name":"Heinisch","orcid":"0009-0006-0984-2097","id":"90283","full_name":"Heinisch, Nils"},{"id":"79191","full_name":"Köcher, Nikolas","last_name":"Köcher","first_name":"Nikolas"},{"last_name":"Bauch","full_name":"Bauch, David","first_name":"David"},{"id":"27271","full_name":"Schumacher, Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","first_name":"Stefan"}],"abstract":[{"lang":"eng","text":"In the SUPER scheme (Swing-UP of the quantum EmitteR population), excitation of a quantum emitter is achieved with two off-resonant, red-detuned laser pulses. This allows the generation of high-quality single photons without the need of complex laser stray light suppression or careful spectral filtering. In the present work, we extend this promising method to quantum emitters, specifically semiconductor quantum dots, inside a resonant optical cavity. A significant advantage of the SUPER scheme is identified in that it eliminates re-excitation of the quantum emitter by suppressing photon emission during the excitation cycle. This, in turn, leads to almost ideal single-photon purity, overcoming a major factor typically limiting the quality of photons generated with quantum emitters in high-quality cavities. We further find that for cavity-mediated biexciton emission of degenerate photon pairs, the SUPER scheme leads to near-perfect biexciton initialization with very high values of polarization entanglement of emitted photon pairs.\r\n \r\n \r\n \r\n \r\n Published by the American Physical Society\r\n 2024\r\n \r\n \r\n "}],"status":"public","publication":"Physical Review Research","type":"journal_article","article_number":"L012017","language":[{"iso":"eng"}],"_id":"61253","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"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"173","name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"35"},{"_id":"230"},{"_id":"429"},{"_id":"27"}],"user_id":"16199"},{"publication":"Nanophotonics","type":"journal_article","abstract":[{"text":"Abstract\r\n Topological states have been widely investigated in different types of systems and lattices. In the present work, we report on topological edge states in double-wave (DW) chains, which can be described by a generalized Aubry-André-Harper (AAH) model. For the specific system of a driven-dissipative exciton polariton system we show that in such potential chains, different types of edge states can form. For resonant optical excitation, we further find that the optical nonlinearity leads to a multistability of different edge states. This includes topologically protected edge states evolved directly from individual linear eigenstates as well as additional edge states that originate from nonlinearity-induced localization of bulk states. Extending the system into two dimensions (2D) by stacking horizontal DW chains in the vertical direction, we also create 2D multi-wave lattices. In such 2D lattices multiple Su–Schrieffer–Heeger (SSH) chains appear along the vertical direction. The combination of DW chains in the horizonal and SSH chains in the vertical direction then results in the formation of higher-order topological insulator corner states. Multistable corner states emerge in the nonlinear regime.","lang":"eng"}],"status":"public","_id":"61255","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"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"55","name":"TRR 142 - Project Area B"},{"_id":"61","name":"TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit Polaritonen in Mikrokavitäten"},{"name":"TRR 142; TP B09: Effiziente Erzeugung mit maßgeschneiderter optischer Phaselage der zweiten Harmonischen mittels Quasi-gebundener Zustände in GaAs Metaoberflächen","_id":"170"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"230"},{"_id":"429"},{"_id":"27"}],"user_id":"16199","language":[{"iso":"eng"}],"publication_identifier":{"issn":["2192-8614"]},"publication_status":"published","issue":"4","year":"2024","intvolume":" 13","page":"509-518","citation":{"ieee":"T. Schneider, W. Gao, T. Zentgraf, S. Schumacher, and X. Ma, “Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates,” Nanophotonics, vol. 13, no. 4, pp. 509–518, 2024, doi: 10.1515/nanoph-2023-0556.","chicago":"Schneider, Tobias, Wenlong Gao, Thomas Zentgraf, Stefan Schumacher, and Xuekai Ma. “Topological Edge and Corner States in Coupled Wave Lattices in Nonlinear Polariton Condensates.” Nanophotonics 13, no. 4 (2024): 509–18. https://doi.org/10.1515/nanoph-2023-0556.","ama":"Schneider T, Gao W, Zentgraf T, Schumacher S, Ma X. Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates. Nanophotonics. 2024;13(4):509-518. doi:10.1515/nanoph-2023-0556","short":"T. Schneider, W. Gao, T. Zentgraf, S. Schumacher, X. Ma, Nanophotonics 13 (2024) 509–518.","bibtex":"@article{Schneider_Gao_Zentgraf_Schumacher_Ma_2024, title={Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates}, volume={13}, DOI={10.1515/nanoph-2023-0556}, number={4}, journal={Nanophotonics}, publisher={Walter de Gruyter GmbH}, author={Schneider, Tobias and Gao, Wenlong and Zentgraf, Thomas and Schumacher, Stefan and Ma, Xuekai}, year={2024}, pages={509–518} }","mla":"Schneider, Tobias, et al. “Topological Edge and Corner States in Coupled Wave Lattices in Nonlinear Polariton Condensates.” Nanophotonics, vol. 13, no. 4, Walter de Gruyter GmbH, 2024, pp. 509–18, doi:10.1515/nanoph-2023-0556.","apa":"Schneider, T., Gao, W., Zentgraf, T., Schumacher, S., & Ma, X. (2024). Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates. Nanophotonics, 13(4), 509–518. https://doi.org/10.1515/nanoph-2023-0556"},"date_updated":"2025-09-12T11:22:41Z","publisher":"Walter de Gruyter GmbH","volume":13,"author":[{"first_name":"Tobias","full_name":"Schneider, Tobias","last_name":"Schneider"},{"first_name":"Wenlong","last_name":"Gao","full_name":"Gao, Wenlong","id":"78853"},{"first_name":"Thomas","id":"30525","full_name":"Zentgraf, Thomas","last_name":"Zentgraf","orcid":"0000-0002-8662-1101"},{"first_name":"Stefan","full_name":"Schumacher, Stefan","id":"27271","orcid":"0000-0003-4042-4951","last_name":"Schumacher"},{"id":"59416","full_name":"Ma, Xuekai","last_name":"Ma","first_name":"Xuekai"}],"date_created":"2025-09-12T11:19:22Z","title":"Topological edge and corner states in coupled wave lattices in nonlinear polariton condensates","doi":"10.1515/nanoph-2023-0556"},{"publication_status":"published","publication_identifier":{"issn":["2643-1564"]},"issue":"1","year":"2024","citation":{"bibtex":"@article{Wingenbach_Schumacher_Ma_2024, title={Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian polariton systems}, volume={6}, DOI={10.1103/physrevresearch.6.013148}, number={1013148}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Wingenbach, Jan and Schumacher, Stefan and Ma, Xuekai}, year={2024} }","short":"J. Wingenbach, S. Schumacher, X. Ma, Physical Review Research 6 (2024).","mla":"Wingenbach, Jan, et al. “Manipulating Spectral Topology and Exceptional Points by Nonlinearity in Non-Hermitian Polariton Systems.” Physical Review Research, vol. 6, no. 1, 013148, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.013148.","apa":"Wingenbach, J., Schumacher, S., & Ma, X. (2024). Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian polariton systems. Physical Review Research, 6(1), Article 013148. https://doi.org/10.1103/physrevresearch.6.013148","ama":"Wingenbach J, Schumacher S, Ma X. Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian polariton systems. Physical Review Research. 2024;6(1). doi:10.1103/physrevresearch.6.013148","chicago":"Wingenbach, Jan, Stefan Schumacher, and Xuekai Ma. “Manipulating Spectral Topology and Exceptional Points by Nonlinearity in Non-Hermitian Polariton Systems.” Physical Review Research 6, no. 1 (2024). https://doi.org/10.1103/physrevresearch.6.013148.","ieee":"J. Wingenbach, S. Schumacher, and X. Ma, “Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian polariton systems,” Physical Review Research, vol. 6, no. 1, Art. no. 013148, 2024, doi: 10.1103/physrevresearch.6.013148."},"intvolume":" 6","publisher":"American Physical Society (APS)","date_updated":"2025-09-12T11:24:59Z","author":[{"last_name":"Wingenbach","id":"69187","full_name":"Wingenbach, Jan","first_name":"Jan"},{"first_name":"Stefan","id":"27271","full_name":"Schumacher, Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher"},{"first_name":"Xuekai","last_name":"Ma","full_name":"Ma, Xuekai","id":"59416"}],"date_created":"2025-09-12T11:23:33Z","volume":6,"title":"Manipulating spectral topology and exceptional points by nonlinearity in non-Hermitian polariton systems","doi":"10.1103/physrevresearch.6.013148","type":"journal_article","publication":"Physical Review Research","abstract":[{"text":"Exceptional points (EPs), with their intriguing spectral topology, have attracted considerable attention in a broad range of physical systems, with potential sensing applications driving much of the present research in this field. Here, we investigate spectral topology and EPs in systems with significant nonlinearity, exemplified by a nonequilibrium exciton-polariton condensate. With the possibility to control loss and gain and nonlinearity by optical means, this system allows for a comprehensive analysis of the interplay of nonlinearities (Kerr type and saturable gain) and non-Hermiticity. Not only do we find that EPs can be intentionally shifted in parameter space by the saturable gain, but we also observe intriguing rotations and intersections of Riemann surfaces and find nonlinearity-enhanced sensing capabilities. With this, our results illustrate the potential of tailoring spectral topology and related phenomena in non-Hermitian systems by nonlinearity.\r\n \r\n \r\n \r\n \r\n Published by the American Physical Society\r\n 2024\r\n \r\n \r\n ","lang":"eng"}],"status":"public","project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"61","name":"TRR 142; TP A04: Nichtlineare Quantenprozesstomographie und Photonik mit Polaritonen in Mikrokavitäten"}],"_id":"61257","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"230"},{"_id":"27"},{"_id":"429"}],"article_number":"013148","language":[{"iso":"eng"}]},{"language":[{"iso":"eng"}],"_id":"61357","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"54","name":"TRR 142 - Project Area A"},{"_id":"55","name":"TRR 142 - Project Area B"},{"_id":"166","name":"TRR 142 - Subproject A11"},{"name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"230"},{"_id":"429"},{"_id":"35"},{"_id":"27"}],"user_id":"16199","status":"public","publication":"The Journal of Physical Chemistry C","type":"journal_article","title":"Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells","doi":"10.1021/acs.jpcc.4c05446","publisher":"American Chemical Society (ACS)","date_updated":"2025-09-18T11:34:21Z","volume":128,"date_created":"2025-09-18T11:32:33Z","author":[{"first_name":"Marvin","full_name":"Krenz, Marvin","last_name":"Krenz"},{"first_name":"Simone","last_name":"Sanna","full_name":"Sanna, Simone"},{"first_name":"Uwe","last_name":"Gerstmann","orcid":"0000-0002-4476-223X","full_name":"Gerstmann, Uwe","id":"171"},{"first_name":"Wolf Gero","full_name":"Schmidt, Wolf Gero","id":"468","last_name":"Schmidt","orcid":"0000-0002-2717-5076"}],"year":"2024","page":"17774-17778","intvolume":" 128","citation":{"chicago":"Krenz, Marvin, Simone Sanna, Uwe Gerstmann, and Wolf Gero Schmidt. “Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells.” The Journal of Physical Chemistry C 128, no. 41 (2024): 17774–78. https://doi.org/10.1021/acs.jpcc.4c05446.","ieee":"M. Krenz, S. Sanna, U. Gerstmann, and W. G. Schmidt, “Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells,” The Journal of Physical Chemistry C, vol. 128, no. 41, pp. 17774–17778, 2024, doi: 10.1021/acs.jpcc.4c05446.","ama":"Krenz M, Sanna S, Gerstmann U, Schmidt WG. Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells. The Journal of Physical Chemistry C. 2024;128(41):17774-17778. doi:10.1021/acs.jpcc.4c05446","apa":"Krenz, M., Sanna, S., Gerstmann, U., & Schmidt, W. G. (2024). Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells. The Journal of Physical Chemistry C, 128(41), 17774–17778. https://doi.org/10.1021/acs.jpcc.4c05446","bibtex":"@article{Krenz_Sanna_Gerstmann_Schmidt_2024, title={Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells}, volume={128}, DOI={10.1021/acs.jpcc.4c05446}, number={41}, journal={The Journal of Physical Chemistry C}, publisher={American Chemical Society (ACS)}, author={Krenz, Marvin and Sanna, Simone and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2024}, pages={17774–17778} }","mla":"Krenz, Marvin, et al. “Understanding and Improving Triplet Exciton Transfer in Sensitized Silicon Solar Cells.” The Journal of Physical Chemistry C, vol. 128, no. 41, American Chemical Society (ACS), 2024, pp. 17774–78, doi:10.1021/acs.jpcc.4c05446.","short":"M. Krenz, S. Sanna, U. Gerstmann, W.G. Schmidt, The Journal of Physical Chemistry C 128 (2024) 17774–17778."},"publication_identifier":{"issn":["1932-7447","1932-7455"]},"publication_status":"published","issue":"41"},{"year":"2024","citation":{"ama":"Zhang H, Zuo R, Yang S, et al. Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models. In: High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC; 2024. doi:10.1142/9789811279560_0006","chicago":"Zhang, Hongdan, Ruixin Zuo, Shidong Yang, Alexander Trautmann, Xiaohong Song, Torsten Meier, and Weifeng Yang. “Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models.” In High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC, 2024. https://doi.org/10.1142/9789811279560_0006.","ieee":"H. Zhang et al., “Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models,” in High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024.","short":"H. Zhang, R. Zuo, S. Yang, A. Trautmann, X. Song, T. Meier, W. Yang, in: High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024.","bibtex":"@inbook{Zhang_Zuo_Yang_Trautmann_Song_Meier_Yang_2024, title={Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models}, DOI={10.1142/9789811279560_0006}, booktitle={High-Order Harmonic Generation in Solids}, publisher={WORLD SCIENTIFIC}, author={Zhang, Hongdan and Zuo, Ruixin and Yang, Shidong and Trautmann, Alexander and Song, Xiaohong and Meier, Torsten and Yang, Weifeng}, year={2024} }","mla":"Zhang, Hongdan, et al. “Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models.” High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024, doi:10.1142/9789811279560_0006.","apa":"Zhang, H., Zuo, R., Yang, S., Trautmann, A., Song, X., Meier, T., & Yang, W. (2024). Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models. In High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC. https://doi.org/10.1142/9789811279560_0006"},"publication_identifier":{"isbn":["9789811279553","9789811279560"]},"publication_status":"published","title":"Analyzing High-Order Harmonic Generation in Solids Based on Semi-Classical Recollision Models","doi":"10.1142/9789811279560_0006","publisher":"WORLD SCIENTIFIC","date_updated":"2025-12-05T09:43:37Z","author":[{"last_name":"Zhang","full_name":"Zhang, Hongdan","first_name":"Hongdan"},{"full_name":"Zuo, Ruixin","last_name":"Zuo","first_name":"Ruixin"},{"first_name":"Shidong","last_name":"Yang","full_name":"Yang, Shidong"},{"full_name":"Trautmann, Alexander","last_name":"Trautmann","first_name":"Alexander"},{"first_name":"Xiaohong","last_name":"Song","full_name":"Song, Xiaohong"},{"first_name":"Torsten","id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072"},{"first_name":"Weifeng","last_name":"Yang","full_name":"Yang, Weifeng"}],"date_created":"2025-12-05T09:42:23Z","status":"public","publication":"High-Order Harmonic Generation in Solids","type":"book_chapter","language":[{"iso":"eng"}],"_id":"62916","project":[{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"},{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"230"},{"_id":"35"},{"_id":"429"},{"_id":"27"}],"user_id":"16199"},{"language":[{"iso":"eng"}],"_id":"62917","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse","_id":"174"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"35"},{"_id":"230"},{"_id":"429"},{"_id":"27"}],"user_id":"16199","status":"public","publication":"High-Order Harmonic Generation in Solids","type":"book_chapter","title":"High-Order Harmonic Generation in Semiconductors with Excitonic Effects","doi":"10.1142/9789811279560_0009","date_updated":"2025-12-05T09:45:31Z","publisher":"WORLD SCIENTIFIC","date_created":"2025-12-05T09:44:20Z","author":[{"last_name":"Reichelt","full_name":"Reichelt, Matthias","id":"138","first_name":"Matthias"},{"full_name":"Zuo, Ruixin","last_name":"Zuo","first_name":"Ruixin"},{"first_name":"Xiaohong","last_name":"Song","full_name":"Song, Xiaohong"},{"first_name":"Weifeng","full_name":"Yang, Weifeng","last_name":"Yang"},{"first_name":"Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","full_name":"Meier, Torsten","id":"344"}],"year":"2024","citation":{"ieee":"M. Reichelt, R. Zuo, X. Song, W. Yang, and T. Meier, “High-Order Harmonic Generation in Semiconductors with Excitonic Effects,” in High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024.","chicago":"Reichelt, Matthias, Ruixin Zuo, Xiaohong Song, Weifeng Yang, and Torsten Meier. “High-Order Harmonic Generation in Semiconductors with Excitonic Effects.” In High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC, 2024. https://doi.org/10.1142/9789811279560_0009.","ama":"Reichelt M, Zuo R, Song X, Yang W, Meier T. High-Order Harmonic Generation in Semiconductors with Excitonic Effects. In: High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC; 2024. doi:10.1142/9789811279560_0009","apa":"Reichelt, M., Zuo, R., Song, X., Yang, W., & Meier, T. (2024). High-Order Harmonic Generation in Semiconductors with Excitonic Effects. In High-Order Harmonic Generation in Solids. WORLD SCIENTIFIC. https://doi.org/10.1142/9789811279560_0009","short":"M. Reichelt, R. Zuo, X. Song, W. Yang, T. Meier, in: High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024.","mla":"Reichelt, Matthias, et al. “High-Order Harmonic Generation in Semiconductors with Excitonic Effects.” High-Order Harmonic Generation in Solids, WORLD SCIENTIFIC, 2024, doi:10.1142/9789811279560_0009.","bibtex":"@inbook{Reichelt_Zuo_Song_Yang_Meier_2024, title={High-Order Harmonic Generation in Semiconductors with Excitonic Effects}, DOI={10.1142/9789811279560_0009}, booktitle={High-Order Harmonic Generation in Solids}, publisher={WORLD SCIENTIFIC}, author={Reichelt, Matthias and Zuo, Ruixin and Song, Xiaohong and Yang, Weifeng and Meier, Torsten}, year={2024} }"},"publication_identifier":{"isbn":["9789811279553","9789811279560"]},"publication_status":"published"},{"_id":"60581","project":[{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"230"},{"_id":"27"},{"_id":"35"}],"user_id":"16199","article_number":"075001","language":[{"iso":"eng"}],"publication":"Journal of Physics: Condensed Matter","type":"journal_article","abstract":[{"text":"Abstract\r\n The natural band alignments between indium phosphide and the main dioxides of titanium, i.e. rutile, anatase, and brookite as well as amorphous titania are calculated from the branch-point energies of the respective materials. Irrespective of the titania polymorph considered, type-I band alignment is predicted. This may change, however, in dependence on the microscopic interface structure: supercell calculations for amorphous titania grown on P-rich InP(001) surfaces result in a titania conduction band that nearly aligns with that of InP. Depending on the interface specifics, both type-I band and type-II band alignments are observed in the simulations. This agrees with recent experimental findings.","lang":"eng"}],"status":"public","date_updated":"2025-12-05T13:35:44Z","publisher":"IOP Publishing","volume":37,"date_created":"2025-07-09T13:40:51Z","author":[{"first_name":"Isaac Azahel","full_name":"Ruiz Alvarado, Isaac Azahel","id":"79462","orcid":"0000-0002-4710-1170","last_name":"Ruiz Alvarado"},{"last_name":"Dreßler","full_name":"Dreßler, Christian","first_name":"Christian"},{"first_name":"Wolf Gero","id":"468","full_name":"Schmidt, Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt"}],"title":"Band alignment at InP/TiO2 interfaces from density-functional theory","doi":"10.1088/1361-648x/ad9725","publication_identifier":{"issn":["0953-8984","1361-648X"]},"publication_status":"published","issue":"7","year":"2024","intvolume":" 37","citation":{"ama":"Ruiz Alvarado IA, Dreßler C, Schmidt WG. Band alignment at InP/TiO2 interfaces from density-functional theory. Journal of Physics: Condensed Matter. 2024;37(7). doi:10.1088/1361-648x/ad9725","chicago":"Ruiz Alvarado, Isaac Azahel, Christian Dreßler, and Wolf Gero Schmidt. “Band Alignment at InP/TiO2 Interfaces from Density-Functional Theory.” Journal of Physics: Condensed Matter 37, no. 7 (2024). https://doi.org/10.1088/1361-648x/ad9725.","ieee":"I. A. Ruiz Alvarado, C. Dreßler, and W. G. Schmidt, “Band alignment at InP/TiO2 interfaces from density-functional theory,” Journal of Physics: Condensed Matter, vol. 37, no. 7, Art. no. 075001, 2024, doi: 10.1088/1361-648x/ad9725.","mla":"Ruiz Alvarado, Isaac Azahel, et al. “Band Alignment at InP/TiO2 Interfaces from Density-Functional Theory.” Journal of Physics: Condensed Matter, vol. 37, no. 7, 075001, IOP Publishing, 2024, doi:10.1088/1361-648x/ad9725.","short":"I.A. Ruiz Alvarado, C. Dreßler, W.G. Schmidt, Journal of Physics: Condensed Matter 37 (2024).","bibtex":"@article{Ruiz Alvarado_Dreßler_Schmidt_2024, title={Band alignment at InP/TiO2 interfaces from density-functional theory}, volume={37}, DOI={10.1088/1361-648x/ad9725}, number={7075001}, journal={Journal of Physics: Condensed Matter}, publisher={IOP Publishing}, author={Ruiz Alvarado, Isaac Azahel and Dreßler, Christian and Schmidt, Wolf Gero}, year={2024} }","apa":"Ruiz Alvarado, I. A., Dreßler, C., & Schmidt, W. G. (2024). Band alignment at InP/TiO2 interfaces from density-functional theory. Journal of Physics: Condensed Matter, 37(7), Article 075001. https://doi.org/10.1088/1361-648x/ad9725"}},{"article_type":"original","language":[{"iso":"eng"}],"project":[{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"_id":"166","name":"TRR 142 - A11: TRR 142 - Subproject A11"},{"name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"54868","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"642"},{"_id":"286"},{"_id":"429"},{"_id":"230"},{"_id":"27"},{"_id":"35"},{"_id":"169"}],"abstract":[{"text":"AbstractMost properties of solid materials are defined by their internal electric field and charge density distributions which so far are difficult to measure with high spatial resolution. Especially for 2D materials, the atomic electric fields influence the optoelectronic properties. In this study, the atomic‐scale electric field and charge density distribution of WSe2 bi‐ and trilayers are revealed using an emerging microscopy technique, differential phase contrast (DPC) imaging in scanning transmission electron microscopy (STEM). For pristine material, a higher positive charge density located at the selenium atomic columns compared to the tungsten atomic columns is obtained and tentatively explained by a coherent scattering effect. Furthermore, the change in the electric field distribution induced by a missing selenium atomic column is investigated. A characteristic electric field distribution in the vicinity of the defect with locally reduced magnitudes compared to the pristine lattice is observed. This effect is accompanied by a considerable inward relaxation of the surrounding lattice, which according to first principles DFT calculation is fully compatible with a missing column of Se atoms. This shows that DPC imaging, as an electric field sensitive technique, provides additional and remarkable information to the otherwise only structural analysis obtained with conventional STEM imaging.","lang":"eng"}],"status":"public","type":"journal_article","publication":"Small","title":"DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging","doi":"10.1002/smll.202311635","publisher":"Wiley","date_updated":"2025-12-05T13:39:01Z","date_created":"2024-06-24T09:46:25Z","author":[{"last_name":"Groll","full_name":"Groll, Maja","first_name":"Maja"},{"first_name":"Julius","full_name":"Bürger, Julius","id":"46952","last_name":"Bürger"},{"first_name":"Ioannis","full_name":"Caltzidis, Ioannis","id":"87911","last_name":"Caltzidis"},{"last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus D.","first_name":"Klaus D."},{"first_name":"Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt","id":"468","full_name":"Schmidt, Wolf Gero"},{"full_name":"Gerstmann, Uwe","id":"171","last_name":"Gerstmann","orcid":"0000-0002-4476-223X","first_name":"Uwe"},{"first_name":"Jörg K. N.","last_name":"Lindner","full_name":"Lindner, Jörg K. N.","id":"20797"}],"year":"2024","citation":{"chicago":"Groll, Maja, Julius Bürger, Ioannis Caltzidis, Klaus D. Jöns, Wolf Gero Schmidt, Uwe Gerstmann, and Jörg K. N. Lindner. “DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging.” Small, 2024. https://doi.org/10.1002/smll.202311635.","ieee":"M. Groll et al., “DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging,” Small, 2024, doi: 10.1002/smll.202311635.","ama":"Groll M, Bürger J, Caltzidis I, et al. DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging. Small. Published online 2024. doi:10.1002/smll.202311635","mla":"Groll, Maja, et al. “DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging.” Small, Wiley, 2024, doi:10.1002/smll.202311635.","bibtex":"@article{Groll_Bürger_Caltzidis_Jöns_Schmidt_Gerstmann_Lindner_2024, title={DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging}, DOI={10.1002/smll.202311635}, journal={Small}, publisher={Wiley}, author={Groll, Maja and Bürger, Julius and Caltzidis, Ioannis and Jöns, Klaus D. and Schmidt, Wolf Gero and Gerstmann, Uwe and Lindner, Jörg K. N.}, year={2024} }","short":"M. Groll, J. Bürger, I. Caltzidis, K.D. Jöns, W.G. Schmidt, U. Gerstmann, J.K.N. Lindner, Small (2024).","apa":"Groll, M., Bürger, J., Caltzidis, I., Jöns, K. D., Schmidt, W. G., Gerstmann, U., & Lindner, J. K. N. (2024). DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging. Small. https://doi.org/10.1002/smll.202311635"},"publication_status":"published","publication_identifier":{"issn":["1613-6810","1613-6829"]}},{"citation":{"mla":"Franzke, Katharina, et al. “Relativistic Calculation of the Orbital Hyperfine Splitting in Complex Microscopic Structures.” Journal of Physics: Conference Series, vol. 2701, no. 1, 012094, IOP Publishing, 2024, doi:10.1088/1742-6596/2701/1/012094.","short":"K. Franzke, W.G. Schmidt, U. Gerstmann, Journal of Physics: Conference Series 2701 (2024).","bibtex":"@article{Franzke_Schmidt_Gerstmann_2024, title={Relativistic calculation of the orbital hyperfine splitting in complex microscopic structures}, volume={2701}, DOI={10.1088/1742-6596/2701/1/012094}, number={1012094}, journal={Journal of Physics: Conference Series}, publisher={IOP Publishing}, author={Franzke, Katharina and Schmidt, Wolf Gero and Gerstmann, Uwe}, year={2024} }","apa":"Franzke, K., Schmidt, W. G., & Gerstmann, U. (2024). Relativistic calculation of the orbital hyperfine splitting in complex microscopic structures. Journal of Physics: Conference Series, 2701(1), Article 012094. https://doi.org/10.1088/1742-6596/2701/1/012094","ieee":"K. Franzke, W. G. Schmidt, and U. Gerstmann, “Relativistic calculation of the orbital hyperfine splitting in complex microscopic structures,” Journal of Physics: Conference Series, vol. 2701, no. 1, Art. no. 012094, 2024, doi: 10.1088/1742-6596/2701/1/012094.","chicago":"Franzke, Katharina, Wolf Gero Schmidt, and Uwe Gerstmann. “Relativistic Calculation of the Orbital Hyperfine Splitting in Complex Microscopic Structures.” Journal of Physics: Conference Series 2701, no. 1 (2024). https://doi.org/10.1088/1742-6596/2701/1/012094.","ama":"Franzke K, Schmidt WG, Gerstmann U. Relativistic calculation of the orbital hyperfine splitting in complex microscopic structures. Journal of Physics: Conference Series. 2024;2701(1). doi:10.1088/1742-6596/2701/1/012094"},"intvolume":" 2701","year":"2024","issue":"1","publication_status":"published","publication_identifier":{"issn":["1742-6588","1742-6596"]},"doi":"10.1088/1742-6596/2701/1/012094","title":"Relativistic calculation of the orbital hyperfine splitting in complex microscopic structures","author":[{"last_name":"Franzke","full_name":"Franzke, Katharina","first_name":"Katharina"},{"id":"468","full_name":"Schmidt, Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076","first_name":"Wolf Gero"},{"orcid":"0000-0002-4476-223X","last_name":"Gerstmann","id":"171","full_name":"Gerstmann, Uwe","first_name":"Uwe"}],"date_created":"2024-06-24T06:26:02Z","volume":2701,"date_updated":"2025-12-05T13:36:01Z","publisher":"IOP Publishing","status":"public","abstract":[{"text":"Abstract\r\n Theoretical spectroscopy based on double perturbation theory is typically challenged by systems with large orbital hyperfine splitting. Therefore, we here derive a rigorous, non-perturbative scheme starting from Dirac’s equation which allows to calculate the contribution of the orbital HFI for complex structures including heavy atoms with strong spin-orbit coupling (SOC). Using the PAW formalism, the method has been implemented in the software package Quantum ESPRESSO. We show that the ‘orbital part’ actually scales with SOC strength if orbital quenching is hindered by low local symmetry, i.e. in case of dimers or atoms at surfaces. This holds true in particular when the unpaired electron is localized in quasi-atomic p-like orbitals. Here, the orbital part is by far not negligible, but becomes dominant by surpassing the dipolar contribution by a factor of five.","lang":"eng"}],"type":"journal_article","publication":"Journal of Physics: Conference Series","language":[{"iso":"eng"}],"article_number":"012094","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"230"},{"_id":"429"},{"_id":"27"},{"_id":"35"}],"project":[{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"name":"TRR 142 - A11: TRR 142 - Subproject A11","_id":"166"},{"_id":"168","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"54856"},{"publication_status":"published","publication_identifier":{"issn":["0031-9007","1079-7114"]},"issue":"7","year":"2024","citation":{"ama":"Krenz M, Gerstmann U, Schmidt WG. Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface. Physical Review Letters. 2024;132(7). doi:10.1103/physrevlett.132.076201","ieee":"M. Krenz, U. Gerstmann, and W. G. Schmidt, “Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface,” Physical Review Letters, vol. 132, no. 7, Art. no. 076201, 2024, doi: 10.1103/physrevlett.132.076201.","chicago":"Krenz, Marvin, Uwe Gerstmann, and Wolf Gero Schmidt. “Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface.” Physical Review Letters 132, no. 7 (2024). https://doi.org/10.1103/physrevlett.132.076201.","short":"M. Krenz, U. Gerstmann, W.G. Schmidt, Physical Review Letters 132 (2024).","mla":"Krenz, Marvin, et al. “Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface.” Physical Review Letters, vol. 132, no. 7, 076201, American Physical Society (APS), 2024, doi:10.1103/physrevlett.132.076201.","bibtex":"@article{Krenz_Gerstmann_Schmidt_2024, title={Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface}, volume={132}, DOI={10.1103/physrevlett.132.076201}, number={7076201}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Krenz, Marvin and Gerstmann, Uwe and Schmidt, Wolf Gero}, year={2024} }","apa":"Krenz, M., Gerstmann, U., & Schmidt, W. G. (2024). Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface. Physical Review Letters, 132(7), Article 076201. https://doi.org/10.1103/physrevlett.132.076201"},"intvolume":" 132","date_updated":"2025-12-05T13:38:22Z","publisher":"American Physical Society (APS)","author":[{"first_name":"Marvin","last_name":"Krenz","full_name":"Krenz, Marvin","id":"52309"},{"full_name":"Gerstmann, Uwe","id":"171","last_name":"Gerstmann","orcid":"0000-0002-4476-223X","first_name":"Uwe"},{"orcid":"0000-0002-2717-5076","last_name":"Schmidt","full_name":"Schmidt, Wolf Gero","id":"468","first_name":"Wolf Gero"}],"date_created":"2024-06-24T09:39:42Z","volume":132,"title":"Defect-Assisted Exciton Transfer across the Tetracene-Si(111):H Interface","doi":"10.1103/physrevlett.132.076201","type":"journal_article","publication":"Physical Review Letters","status":"public","project":[{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"_id":"168","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"name":"TRR 142 - A11: TRR 142 - Subproject A11","_id":"166"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"54865","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"429"},{"_id":"27"},{"_id":"230"},{"_id":"35"}],"article_number":"076201","language":[{"iso":"eng"}]},{"title":"Time-bin entanglement in the deterministic generation of linear photonic cluster states","doi":"10.1063/5.0214197","publisher":"AIP Publishing","date_updated":"2025-12-05T13:55:00Z","volume":1,"author":[{"first_name":"David","full_name":"Bauch, David","last_name":"Bauch"},{"first_name":"Nikolas","id":"79191","full_name":"Köcher, Nikolas","last_name":"Köcher"},{"last_name":"Heinisch","orcid":"0009-0006-0984-2097","id":"90283","full_name":"Heinisch, Nils","first_name":"Nils"},{"id":"27271","full_name":"Schumacher, Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher","first_name":"Stefan"}],"date_created":"2025-12-04T12:35:53Z","year":"2024","intvolume":" 1","citation":{"chicago":"Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” APL Quantum 1, no. 3 (2024). https://doi.org/10.1063/5.0214197.","ieee":"D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement in the deterministic generation of linear photonic cluster states,” APL Quantum, vol. 1, no. 3, Art. no. 036110, 2024, doi: 10.1063/5.0214197.","ama":"Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic generation of linear photonic cluster states. APL Quantum. 2024;1(3). doi:10.1063/5.0214197","short":"D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).","mla":"Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” APL Quantum, vol. 1, no. 3, 036110, AIP Publishing, 2024, doi:10.1063/5.0214197.","bibtex":"@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement in the deterministic generation of linear photonic cluster states}, volume={1}, DOI={10.1063/5.0214197}, number={3036110}, journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher, Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }","apa":"Bauch, D., Köcher, N., Heinisch, N., & Schumacher, S. (2024). Time-bin entanglement in the deterministic generation of linear photonic cluster states. APL Quantum, 1(3), Article 036110. https://doi.org/10.1063/5.0214197"},"publication_identifier":{"issn":["2835-0103"]},"publication_status":"published","issue":"3","article_number":"036110","language":[{"iso":"eng"}],"_id":"62868","project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen","_id":"173"},{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - Project Area C","_id":"56"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"27"},{"_id":"429"},{"_id":"230"},{"_id":"623"}],"user_id":"16199","abstract":[{"lang":"eng","text":"We theoretically investigate strategies for the deterministic creation of trains of time-bin entangled photons using an individual quantum emitter described by a Λ-type electronic system. We explicitly demonstrate the theoretical generation of linear cluster states with substantial numbers of entangled photonic qubits in full microscopic numerical simulations. The underlying scheme is based on the manipulation of ground state coherences through precise optical driving. One important finding is that the most easily accessible quality metrics, the achievable rotation fidelities, fall short in assessing the actual quantum correlations of the emitted photons in the face of losses. To address this, we explicitly calculate stabilizer generator expectation values as a superior gauge for the quantum properties of the generated many-photon state. With widespread applicability in other emitter and excitation–emission schemes also, our work lays the conceptual foundations for an in-depth practical analysis of time-bin entanglement based on full numerical simulations with predictive capabilities for realistic systems and setups, including losses and imperfections. The specific results shown in the present work illustrate that with controlled minimization of losses and realistic system parameters for quantum-dot type systems, useful linear cluster states of significant lengths can be generated in the calculations, discussing the possibility of scalability for quantum information processing endeavors."}],"status":"public","publication":"APL Quantum","type":"journal_article"},{"publication_identifier":{"issn":["2511-9044","2511-9044"]},"publication_status":"published","intvolume":" 7","citation":{"ama":"Boos K, Sbresny F, Kim SK, et al. Coherent Swing‐Up Excitation for Semiconductor Quantum Dots. Advanced Quantum Technologies. 2024;7(4). doi:10.1002/qute.202300359","chicago":"Boos, Katarina, Friedrich Sbresny, Sang Kyu Kim, Malte Kremser, Hubert Riedl, Frederik W. Bopp, William Rauhaus, et al. “Coherent Swing‐Up Excitation for Semiconductor Quantum Dots.” Advanced Quantum Technologies 7, no. 4 (2024). https://doi.org/10.1002/qute.202300359.","ieee":"K. Boos et al., “Coherent Swing‐Up Excitation for Semiconductor Quantum Dots,” Advanced Quantum Technologies, vol. 7, no. 4, Art. no. 2300359, 2024, doi: 10.1002/qute.202300359.","short":"K. Boos, F. Sbresny, S.K. Kim, M. Kremser, H. Riedl, F.W. Bopp, W. Rauhaus, B. Scaparra, K. Jöns, J.J. Finley, K. Müller, L. Hanschke, Advanced Quantum Technologies 7 (2024).","bibtex":"@article{Boos_Sbresny_Kim_Kremser_Riedl_Bopp_Rauhaus_Scaparra_Jöns_Finley_et al._2024, title={Coherent Swing‐Up Excitation for Semiconductor Quantum Dots}, volume={7}, DOI={10.1002/qute.202300359}, number={42300359}, journal={Advanced Quantum Technologies}, publisher={Wiley}, author={Boos, Katarina and Sbresny, Friedrich and Kim, Sang Kyu and Kremser, Malte and Riedl, Hubert and Bopp, Frederik W. and Rauhaus, William and Scaparra, Bianca and Jöns, Klaus and Finley, Jonathan J. and et al.}, year={2024} }","mla":"Boos, Katarina, et al. “Coherent Swing‐Up Excitation for Semiconductor Quantum Dots.” Advanced Quantum Technologies, vol. 7, no. 4, 2300359, Wiley, 2024, doi:10.1002/qute.202300359.","apa":"Boos, K., Sbresny, F., Kim, S. K., Kremser, M., Riedl, H., Bopp, F. W., Rauhaus, W., Scaparra, B., Jöns, K., Finley, J. J., Müller, K., & Hanschke, L. (2024). Coherent Swing‐Up Excitation for Semiconductor Quantum Dots. Advanced Quantum Technologies, 7(4), Article 2300359. https://doi.org/10.1002/qute.202300359"},"date_updated":"2025-12-11T13:00:06Z","volume":7,"author":[{"first_name":"Katarina","last_name":"Boos","full_name":"Boos, Katarina"},{"first_name":"Friedrich","last_name":"Sbresny","full_name":"Sbresny, Friedrich"},{"full_name":"Kim, Sang Kyu","last_name":"Kim","first_name":"Sang Kyu"},{"first_name":"Malte","last_name":"Kremser","full_name":"Kremser, Malte"},{"full_name":"Riedl, Hubert","last_name":"Riedl","first_name":"Hubert"},{"full_name":"Bopp, Frederik W.","last_name":"Bopp","first_name":"Frederik W."},{"full_name":"Rauhaus, William","last_name":"Rauhaus","first_name":"William"},{"first_name":"Bianca","last_name":"Scaparra","full_name":"Scaparra, Bianca"},{"first_name":"Klaus","last_name":"Jöns","full_name":"Jöns, Klaus","id":"85353"},{"full_name":"Finley, Jonathan J.","last_name":"Finley","first_name":"Jonathan J."},{"full_name":"Müller, Kai","last_name":"Müller","first_name":"Kai"},{"first_name":"Lukas","last_name":"Hanschke","full_name":"Hanschke, Lukas"}],"doi":"10.1002/qute.202300359","type":"journal_article","status":"public","_id":"62853","department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"user_id":"48188","article_number":"2300359","issue":"4","year":"2024","publisher":"Wiley","date_created":"2025-12-04T12:08:46Z","title":"Coherent Swing‐Up Excitation for Semiconductor Quantum Dots","publication":"Advanced Quantum Technologies","abstract":[{"lang":"eng","text":"Abstract\r\n Developing coherent excitation methods for quantum emitters ensuring high brightness, optimal single‐photon purity and indistinguishability of the emitted photons has been a key challenge in the past years. While various methods have been proposed and explored, they all have specific advantages and disadvantages. This study investigates the dynamics of the recent swing‐up scheme as an excitation method for a two‐level system and its performance in single‐photon generation. By applying two far red‐detuned laser pulses, the two‐level system can be prepared in the excited state with near‐unity fidelity. The successful operation and coherent character of this technique are demonstrated using a semiconductor quantum dot (QD). Moreover, the multi‐dimensional parameter space of the two laser pulses is explored to analyze its impact on excitation fidelity. Finally, the performance of the scheme as an excitation method for generating high‐quality single photons is analyzed. The swing‐up scheme itself proves effective, exhibiting nearly perfect single‐photon purity, while the observed indistinguishability in the studied sample is limited by the influence of the inevitable high excitation powers on the semiconductor environment of the quantum dot."}],"language":[{"iso":"eng"}]},{"language":[{"iso":"eng"}],"_id":"62858","external_id":{"arxiv":["2409.19167"]},"department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"user_id":"48188","abstract":[{"lang":"eng","text":"Phonons in solid-state quantum emitters play a crucial role in their performance as photon sources in quantum technology. For resonant driving, phonons dampen the Rabi oscillations resulting in reduced preparation fidelities. The phonon spectral density, which quantifies the strength of the carrier-phonon interaction, is non-monotonous as a function of energy. As one of the most prominent consequences, this leads to the reappearance of Rabi rotations for increasing pulse power, which was theoretically predicted in Phys. Rev. Lett. 98, 227403 (2007). In this paper we present the experimental demonstration of the reappearance of Rabi rotations."}],"status":"public","publication":"arXiv:2409.19167","type":"preprint","title":"Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots","date_updated":"2025-12-11T12:54:41Z","author":[{"full_name":"Hanschke, L.","last_name":"Hanschke","first_name":"L."},{"first_name":"T. K.","full_name":"Bracht, T. K.","last_name":"Bracht"},{"first_name":"E.","last_name":"Schöll","full_name":"Schöll, E."},{"last_name":"Bauch","full_name":"Bauch, David","id":"44172","first_name":"David"},{"full_name":"Berger, Eva","last_name":"Berger","first_name":"Eva"},{"last_name":"Kallert","full_name":"Kallert, Patricia","first_name":"Patricia"},{"first_name":"M.","full_name":"Peter, M.","last_name":"Peter"},{"last_name":"Garcia","full_name":"Garcia, A. J.","first_name":"A. J."},{"full_name":"Silva, S. F. Covre da","last_name":"Silva","first_name":"S. F. Covre da"},{"last_name":"Manna","full_name":"Manna, S.","first_name":"S."},{"first_name":"A.","last_name":"Rastelli","full_name":"Rastelli, A."},{"last_name":"Schumacher","orcid":"0000-0003-4042-4951","id":"27271","full_name":"Schumacher, Stefan","first_name":"Stefan"},{"full_name":"Reiter, D. E.","last_name":"Reiter","first_name":"D. E."},{"last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus","first_name":"Klaus"}],"date_created":"2025-12-04T12:16:58Z","year":"2024","citation":{"ieee":"L. Hanschke et al., “Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots,” arXiv:2409.19167. 2024.","chicago":"Hanschke, L., T. K. Bracht, E. Schöll, David Bauch, Eva Berger, Patricia Kallert, M. Peter, et al. “Experimental Measurement of the Reappearance of Rabi Rotations in Semiconductor Quantum Dots.” ArXiv:2409.19167, 2024.","ama":"Hanschke L, Bracht TK, Schöll E, et al. Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots. arXiv:240919167. Published online 2024.","apa":"Hanschke, L., Bracht, T. K., Schöll, E., Bauch, D., Berger, E., Kallert, P., Peter, M., Garcia, A. J., Silva, S. F. C. da, Manna, S., Rastelli, A., Schumacher, S., Reiter, D. E., & Jöns, K. (2024). Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots. In arXiv:2409.19167.","mla":"Hanschke, L., et al. “Experimental Measurement of the Reappearance of Rabi Rotations in Semiconductor Quantum Dots.” ArXiv:2409.19167, 2024.","short":"L. Hanschke, T.K. Bracht, E. Schöll, D. Bauch, E. Berger, P. Kallert, M. Peter, A.J. Garcia, S.F.C. da Silva, S. Manna, A. Rastelli, S. Schumacher, D.E. Reiter, K. Jöns, ArXiv:2409.19167 (2024).","bibtex":"@article{Hanschke_Bracht_Schöll_Bauch_Berger_Kallert_Peter_Garcia_Silva_Manna_et al._2024, title={Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots}, journal={arXiv:2409.19167}, author={Hanschke, L. and Bracht, T. K. and Schöll, E. and Bauch, David and Berger, Eva and Kallert, Patricia and Peter, M. and Garcia, A. J. and Silva, S. F. Covre da and Manna, S. and et al.}, year={2024} }"}},{"date_updated":"2025-12-11T12:58:57Z","_id":"62856","author":[{"last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus","first_name":"Klaus"}],"user_id":"48188","date_created":"2025-12-04T12:13:39Z","department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"title":"Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities","language":[{"iso":"eng"}],"type":"preprint","year":"2024","abstract":[{"lang":"eng","text":"On-chip emitters that can generate single and entangled photons are essential building blocks for developing photonic quantum information processing technologies in a scalable fashion. Semiconductor quantum dots (QDs) are attractive candidates that emit high-quality quantum states of light on demand, however at a rate limited by their spontaneous radiative lifetime. In this study, we utilize the Purcell effect to demonstrate up to a 38-fold enhancement in the emission rate of InAs QDs by coupling them to metal-clad GaAs nanopillars. These cavities, featuring a sub-wavelength mode volume of 4.5x10-4 (λ/n)3 and low quality factor of 62, enable Purcell-enhanced single-photon emission across a large bandwidth of 15 nm. The broadband nature of the cavity eliminates the need for implementing tuning mechanisms typically required to achieve QD-cavity resonance, thus relaxing fabrication constraints. Ultimately, this QD-cavity architecture represents a significant stride towards developing solid-state quantum emitters generating near-ideal single-photon states at GHz-level repetition rates."}],"citation":{"chicago":"Jöns, Klaus. “Purcell-Enhanced Single-Photon Emission from InAs/GaAs Quantum Dots Coupled to Broadband Cylindrical Nanocavities,” 2024.","ieee":"K. Jöns, “Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities.” 2024.","ama":"Jöns K. Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities. Published online 2024.","apa":"Jöns, K. (2024). Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities.","mla":"Jöns, Klaus. Purcell-Enhanced Single-Photon Emission from InAs/GaAs Quantum Dots Coupled to Broadband Cylindrical Nanocavities. 2024.","short":"K. Jöns, (2024).","bibtex":"@article{Jöns_2024, title={Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities}, author={Jöns, Klaus}, year={2024} }"},"status":"public"},{"publication_status":"published","publication_identifier":{"issn":["2643-1564"]},"issue":"4","year":"2023","citation":{"apa":"Scharwald, D., Meier, T., & Sharapova, P. R. (2023). Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers. Physical Review Research, 5(4), Article 043158. https://doi.org/10.1103/physrevresearch.5.043158","mla":"Scharwald, D., et al. “Phase Sensitivity of Spatially Broadband High-Gain <mml:Math Xmlns:Mml=\"http://Www.W3.Org/1998/Math/MathML\"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math> 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.R. Sharapova, Physical Review Research 5 (2023).","bibtex":"@article{Scharwald_Meier_Sharapova_2023, title={Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers}, volume={5}, DOI={10.1103/physrevresearch.5.043158}, number={4043158}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Scharwald, D. and Meier, T. and Sharapova, P. R.}, year={2023} }","ieee":"D. Scharwald, T. Meier, and P. R. Sharapova, “Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers,” Physical Review Research, vol. 5, no. 4, Art. no. 043158, 2023, doi: 10.1103/physrevresearch.5.043158.","chicago":"Scharwald, D., T. Meier, and P. R. Sharapova. “Phase Sensitivity of Spatially Broadband High-Gain <mml:Math Xmlns:Mml=\"http://Www.W3.Org/1998/Math/MathML\"><mml:Mrow><mml:Mi>SU</Mml:Mi><mml:Mo>(</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>,</Mml:Mo><mml:Mn>1</Mml:Mn><mml:Mo>)</Mml:Mo></Mml:Mrow></Mml:Math> Interferometers.” Physical Review Research 5, no. 4 (2023). https://doi.org/10.1103/physrevresearch.5.043158.","ama":"Scharwald D, Meier T, Sharapova PR. Phase sensitivity of spatially broadband high-gain <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\"><mml:mrow><mml:mi>SU</mml:mi><mml:mo>(</mml:mo><mml:mn>1</mml:mn><mml:mo>,</mml:mo><mml:mn>1</mml:mn><mml:mo>)</mml:mo></mml:mrow></mml:math> interferometers. Physical Review Research. 2023;5(4). doi:10.1103/physrevresearch.5.043158"},"intvolume":" 5","publisher":"American Physical Society (APS)","date_updated":"2023-11-22T09:19:02Z","date_created":"2023-11-22T09:18:02Z","author":[{"first_name":"D.","last_name":"Scharwald","full_name":"Scharwald, D."},{"first_name":"T.","last_name":"Meier","full_name":"Meier, T."},{"first_name":"P. R.","last_name":"Sharapova","full_name":"Sharapova, P. R."}],"volume":5,"title":"Phase sensitivity of spatially broadband high-gain SU(1,1) interferometers","doi":"10.1103/physrevresearch.5.043158","type":"journal_article","publication":"Physical Review Research","status":"public","_id":"49117","user_id":"60286","department":[{"_id":"15"},{"_id":"170"},{"_id":"230"},{"_id":"569"},{"_id":"429"}],"article_number":"043158","keyword":["General Physics and Astronomy"],"language":[{"iso":"eng"}]},{"language":[{"iso":"eng"}],"keyword":["tet_topic_qd"],"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","title":"On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs","date_created":"2023-11-03T10:07:38Z","publisher":"Wiley","year":"2023","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"}],"project":[{"grant_number":"231447078","_id":"173","name":"TRR 142 - C09: TRR 142 - Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen (C09*)"},{"name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167","grant_number":"231447078"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"48599","status":"public","type":"journal_article","main_file_link":[{"url":"https://onlinelibrary.wiley.com/doi/10.1002/qute.202300142","open_access":"1"}],"doi":"10.1002/qute.202300142","author":[{"full_name":"Bauch, David","last_name":"Bauch","first_name":"David"},{"full_name":"Siebert, Dustin","last_name":"Siebert","first_name":"Dustin"},{"first_name":"Klaus","id":"85353","full_name":"Jöns, Klaus","last_name":"Jöns"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158"},{"first_name":"Stefan","full_name":"Schumacher, Stefan","id":"27271","last_name":"Schumacher","orcid":"0000-0003-4042-4951"}],"oa":"1","date_updated":"2023-12-21T10:41:17Z","citation":{"ama":"Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies. Published online 2023. doi:10.1002/qute.202300142","chicago":"Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” Advanced Quantum Technologies, 2023. https://doi.org/10.1002/qute.202300142.","ieee":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” Advanced Quantum Technologies, 2023, doi: 10.1002/qute.202300142.","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, DOI={10.1002/qute.202300142}, journal={Advanced Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus 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, Wiley, 2023, doi:10.1002/qute.202300142.","short":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies (2023).","apa":"Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023). On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies. https://doi.org/10.1002/qute.202300142"},"related_material":{"record":[{"relation":"earlier_version","id":"43246","status":"public"}]},"publication_status":"published","publication_identifier":{"issn":["2511-9044","2511-9044"]}},{"_id":"43246","project":[{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"grant_number":"231447078","_id":"173","name":"TRR 142 - C09: TRR 142 - Subproject C09"},{"_id":"167","name":"TRR 142 - B06: TRR 142 - Subproject B06","grant_number":"231447078"},{"_id":"53","name":"TRR 142: TRR 142","grant_number":"231447078"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - C: TRR 142 - Project Area C","_id":"56"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"},{"_id":"15"},{"_id":"35"},{"_id":"170"},{"_id":"297"}],"user_id":"16199","keyword":["tet_topic_phc","tet_topic_qd"],"language":[{"iso":"eng"}],"type":"preprint","abstract":[{"text":"The biexciton-exciton emission cascade commonly used in quantum-dot systems to generate polarization entanglement yields photons with intrinsically limited indistinguishability. In the present work we focus on the generation of pairs of photons with high degrees of polarization entanglement and simultaneously high indistinguishibility. We achieve this goal by selectively reducing the biexciton lifetime with an optical resonator. We demonstrate 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 two-fold degenerate optical modes. Our 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. We report non-trivial dependencies on system parameters and use the predictive power of our combined theoretical approach to determine the optimal range of Purcell enhancement that maximizes indistinguishability and entanglement to near unity values in the telecom C-band at $1550\\,\\mathrm{nm}$.","lang":"eng"}],"status":"public","oa":"1","date_updated":"2023-12-21T10:41:17Z","author":[{"last_name":"Bauch","full_name":"Bauch, David","first_name":"David"},{"last_name":"Siebert","full_name":"Siebert, Dustin","first_name":"Dustin"},{"first_name":"Klaus","id":"85353","full_name":"Jöns, Klaus","last_name":"Jöns"},{"first_name":"Jens","orcid":"0000-0001-7059-9862","last_name":"Förstner","id":"158","full_name":"Förstner, Jens"},{"first_name":"Stefan","full_name":"Schumacher, Stefan","id":"27271","last_name":"Schumacher","orcid":"0000-0003-4042-4951"}],"date_created":"2023-03-31T13:22:05Z","title":"On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs","main_file_link":[{"open_access":"1","url":"https://arxiv.org/pdf/2303.13871.pdf"}],"related_material":{"record":[{"status":"public","id":"48599","relation":"later_version"}]},"year":"2023","citation":{"ieee":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, and S. Schumacher, “On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs.” 2023.","chicago":"Bauch, David, Dustin Siebert, Klaus Jöns, Jens Förstner, and Stefan Schumacher. “On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using Tailored Cavity Designs,” 2023.","ama":"Bauch D, Siebert D, Jöns K, Förstner J, Schumacher S. On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs. Published online 2023.","apa":"Bauch, D., Siebert, D., Jöns, K., Förstner, J., & Schumacher, S. (2023). On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs.","short":"D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, (2023).","mla":"Bauch, David, et al. On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using Tailored Cavity Designs. 2023.","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus and Förstner, Jens and Schumacher, Stefan}, year={2023} }"}}]