[{"year":"2025","citation":{"ama":"Sena M, Flament M, Andrewski S, et al. High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic. Journal of Optical Communications and Networking. 2025;17(12). doi:10.1364/jocn.575396","chicago":"Sena, Matheus, Mael Flament, Shane Andrewski, Ioannis Caltzidis, Niccolò Bigagli, Thomas Rieser, Gabriel Bello Portmann, et al. “High-Fidelity Quantum Entanglement Distribution in Metropolitan Fiber Networks with Co-Propagating Classical Traffic.” Journal of Optical Communications and Networking 17, no. 12 (2025). https://doi.org/10.1364/jocn.575396.","ieee":"M. Sena et al., “High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic,” Journal of Optical Communications and Networking, vol. 17, no. 12, Art. no. 1072, 2025, doi: 10.1364/jocn.575396.","apa":"Sena, M., Flament, M., Andrewski, S., Caltzidis, I., Bigagli, N., Rieser, T., Bello Portmann, G., Sekelsky, R., Braun, R.-P., Craddock, A. N., Schulz, M., Jöns, K., Ritter, M., Geitz, M., Holschke, O., & Namazi, M. (2025). High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic. Journal of Optical Communications and Networking, 17(12), Article 1072. https://doi.org/10.1364/jocn.575396","mla":"Sena, Matheus, et al. “High-Fidelity Quantum Entanglement Distribution in Metropolitan Fiber Networks with Co-Propagating Classical Traffic.” Journal of Optical Communications and Networking, vol. 17, no. 12, 1072, Optica Publishing Group, 2025, doi:10.1364/jocn.575396.","short":"M. Sena, M. Flament, S. Andrewski, I. Caltzidis, N. Bigagli, T. Rieser, G. Bello Portmann, R. Sekelsky, R.-P. Braun, A.N. Craddock, M. Schulz, K. Jöns, M. Ritter, M. Geitz, O. Holschke, M. Namazi, Journal of Optical Communications and Networking 17 (2025).","bibtex":"@article{Sena_Flament_Andrewski_Caltzidis_Bigagli_Rieser_Bello Portmann_Sekelsky_Braun_Craddock_et al._2025, title={High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic}, volume={17}, DOI={10.1364/jocn.575396}, number={121072}, journal={Journal of Optical Communications and Networking}, publisher={Optica Publishing Group}, author={Sena, Matheus and Flament, Mael and Andrewski, Shane and Caltzidis, Ioannis and Bigagli, Niccolò and Rieser, Thomas and Bello Portmann, Gabriel and Sekelsky, Rourke and Braun, Ralf-Peter and Craddock, Alexander N. and et al.}, year={2025} }"},"intvolume":" 17","publication_status":"published","publication_identifier":{"issn":["1943-0620","1943-0639"]},"issue":"12","title":"High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic","doi":"10.1364/jocn.575396","publisher":"Optica Publishing Group","date_updated":"2025-12-04T13:37:02Z","date_created":"2025-12-04T12:20:01Z","author":[{"first_name":"Matheus","full_name":"Sena, Matheus","last_name":"Sena"},{"last_name":"Flament","full_name":"Flament, Mael","first_name":"Mael"},{"last_name":"Andrewski","full_name":"Andrewski, Shane","first_name":"Shane"},{"first_name":"Ioannis","full_name":"Caltzidis, Ioannis","last_name":"Caltzidis"},{"first_name":"Niccolò","full_name":"Bigagli, Niccolò","last_name":"Bigagli"},{"first_name":"Thomas","full_name":"Rieser, Thomas","last_name":"Rieser"},{"first_name":"Gabriel","last_name":"Bello Portmann","full_name":"Bello Portmann, Gabriel"},{"first_name":"Rourke","full_name":"Sekelsky, Rourke","last_name":"Sekelsky"},{"first_name":"Ralf-Peter","last_name":"Braun","full_name":"Braun, Ralf-Peter"},{"last_name":"Craddock","full_name":"Craddock, Alexander N.","first_name":"Alexander N."},{"last_name":"Schulz","full_name":"Schulz, Maximilian","first_name":"Maximilian"},{"first_name":"Klaus","id":"85353","full_name":"Jöns, Klaus","last_name":"Jöns"},{"full_name":"Ritter, Michaela","last_name":"Ritter","first_name":"Michaela"},{"last_name":"Geitz","full_name":"Geitz, Marc","first_name":"Marc"},{"first_name":"Oliver","full_name":"Holschke, Oliver","last_name":"Holschke"},{"full_name":"Namazi, Mehdi","last_name":"Namazi","first_name":"Mehdi"}],"volume":17,"abstract":[{"text":"\r\n The Quantum Internet, a network of quantum-enabled infrastructure, represents the next frontier in telecommunications, promising capabilities that cannot be attained by classical counterparts. A crucial step in realizing such large-scale quantum networks is the integration of entanglement distribution within existing telecommunication infrastructure. Here, we demonstrate a real-world scalable quantum networking testbed deployed within Deutsche Telekom’s metropolitan fibers in Berlin. Using commercially available quantum devices and standard add-drop multiplexing hardware, we distributed polarization-entangled photon pairs over dynamically selectable looped fiber paths ranging from 10 m to 60 km and showed entanglement distribution over up to approximately 100 km. Quantum signals, transmitted at 1324 nm (O-band), coexist with conventional bidirectional C-band traffic without dedicated fibers or infrastructure changes. Active stabilization of the polarization enables robust long-term performance, achieving entanglement Bell-state fidelity bounds between 85% and 99% and Clauser–Horne–Shimony–Holt parameter\r\n S\r\n -values between 2.36 and 2.74 during continuous multiday operation. By achieving a high-fidelity entanglement distribution with less than 1.5% downtime, we confirm the feasibility of hybrid quantum-classical networks under real-world conditions at the metropolitan scale. These results establish deployment benchmarks and provide a practical roadmap for telecom operators to integrate quantum capabilities.\r\n ","lang":"eng"}],"status":"public","type":"journal_article","publication":"Journal of Optical Communications and Networking","article_number":"1072","language":[{"iso":"eng"}],"_id":"62860","user_id":"85353","department":[{"_id":"623"},{"_id":"15"}]},{"issue":"3","publication_identifier":{"issn":["2643-1564"]},"publication_status":"published","intvolume":" 7","citation":{"mla":"Bermúdez-Feijóo, Santiago, et al. “Spectral Correlations of Dynamical Resonance Fluorescence.” Physical Review Research, vol. 7, no. 3, 033296, American Physical Society (APS), 2025, doi:10.1103/jmy9-bd3l.","bibtex":"@article{Bermúdez-Feijóo_Zubizarreta Casalengua_Müller_Jöns_2025, title={Spectral correlations of dynamical resonance fluorescence}, volume={7}, DOI={10.1103/jmy9-bd3l}, number={3033296}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Bermúdez-Feijóo, Santiago and Zubizarreta Casalengua, Eduardo and Müller, Kai and Jöns, Klaus}, year={2025} }","short":"S. Bermúdez-Feijóo, E. Zubizarreta Casalengua, K. Müller, K. Jöns, Physical Review Research 7 (2025).","apa":"Bermúdez-Feijóo, S., Zubizarreta Casalengua, E., Müller, K., & Jöns, K. (2025). Spectral correlations of dynamical resonance fluorescence. Physical Review Research, 7(3), Article 033296. https://doi.org/10.1103/jmy9-bd3l","ieee":"S. Bermúdez-Feijóo, E. Zubizarreta Casalengua, K. Müller, and K. Jöns, “Spectral correlations of dynamical resonance fluorescence,” Physical Review Research, vol. 7, no. 3, Art. no. 033296, 2025, doi: 10.1103/jmy9-bd3l.","chicago":"Bermúdez-Feijóo, Santiago, Eduardo Zubizarreta Casalengua, Kai Müller, and Klaus Jöns. “Spectral Correlations of Dynamical Resonance Fluorescence.” Physical Review Research 7, no. 3 (2025). https://doi.org/10.1103/jmy9-bd3l.","ama":"Bermúdez-Feijóo S, Zubizarreta Casalengua E, Müller K, Jöns K. Spectral correlations of dynamical resonance fluorescence. Physical Review Research. 2025;7(3). doi:10.1103/jmy9-bd3l"},"year":"2025","volume":7,"author":[{"full_name":"Bermúdez-Feijóo, Santiago","last_name":"Bermúdez-Feijóo","first_name":"Santiago"},{"first_name":"Eduardo","full_name":"Zubizarreta Casalengua, Eduardo","last_name":"Zubizarreta Casalengua"},{"first_name":"Kai","full_name":"Müller, Kai","last_name":"Müller"},{"first_name":"Klaus","last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus"}],"date_created":"2025-12-04T12:19:04Z","date_updated":"2025-12-11T12:52:24Z","publisher":"American Physical Society (APS)","doi":"10.1103/jmy9-bd3l","title":"Spectral correlations of dynamical resonance fluorescence","publication":"Physical Review Research","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"Frequency-filtered photon correlations have been proven to be extremely useful in grasping how the detection process alters photon statistics. Harnessing the spectral correlations also permits refinement of the emission and unraveling of previously hidden strong correlations in a plethora of quantum-optical systems under continuous-wave excitation. In this work, we investigate such correlations for time-dependent excitation and develop a methodology to compute efficiently time-integrated correlations, which are at the heart of the photon-counting theory, and subsequently apply it to analyze the photon emission of pulsed systems. By combining this formalism with the —which facilitates frequency-resolved correlations—we demonstrate how spectral filtering enhances single-photon purity and suppresses multiphoton noise in time-bin-encoded quantum states. Specifically, filtering the central spectral peak of a dynamically driven two-level system boosts temporal coherence and improves the fidelity of time-bin entanglement preparation, even under conditions favoring multiphoton emission. These results establish spectral filtering as a critical tool for tailoring photon statistics in pulsed quantum light sources."}],"department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"user_id":"48188","_id":"62859","language":[{"iso":"eng"}],"article_number":"033296"},{"year":"2025","intvolume":" 16","citation":{"mla":"Laneve, Alessandro, et al. “Quantum Teleportation with Dissimilar Quantum Dots over a Hybrid Quantum Network.” Nature Communications, vol. 16, no. 1, 10028, Springer Science and Business Media LLC, 2025, doi:10.1038/s41467-025-65911-9.","bibtex":"@article{Laneve_Ronco_Beccaceci_Barigelli_Salusti_Claro-Rodriguez_De Pascalis_Suprano_Chiaudano_Schöll_et al._2025, title={Quantum teleportation with dissimilar quantum dots over a hybrid quantum network}, volume={16}, DOI={10.1038/s41467-025-65911-9}, number={110028}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Laneve, Alessandro and Ronco, Giuseppe and Beccaceci, Mattia and Barigelli, Paolo and Salusti, Francesco and Claro-Rodriguez, Nicolas and De Pascalis, Giorgio and Suprano, Alessia and Chiaudano, Leone and Schöll, Eva and et al.}, year={2025} }","short":"A. Laneve, G. Ronco, M. Beccaceci, P. Barigelli, F. Salusti, N. Claro-Rodriguez, G. De Pascalis, A. Suprano, L. Chiaudano, E. Schöll, L. Hanschke, T.M. Krieger, Q. Buchinger, S.F. Covre da Silva, J. Neuwirth, S. Stroj, S. Höfling, T. Huber-Loyola, M.A. Usuga Castaneda, G. Carvacho, N. Spagnolo, M.B. Rota, F. Basso Basset, A. Rastelli, F. Sciarrino, K. Jöns, R. Trotta, Nature Communications 16 (2025).","apa":"Laneve, A., Ronco, G., Beccaceci, M., Barigelli, P., Salusti, F., Claro-Rodriguez, N., De Pascalis, G., Suprano, A., Chiaudano, L., Schöll, E., Hanschke, L., Krieger, T. M., Buchinger, Q., Covre da Silva, S. F., Neuwirth, J., Stroj, S., Höfling, S., Huber-Loyola, T., Usuga Castaneda, M. A., … Trotta, R. (2025). Quantum teleportation with dissimilar quantum dots over a hybrid quantum network. Nature Communications, 16(1), Article 10028. https://doi.org/10.1038/s41467-025-65911-9","ama":"Laneve A, Ronco G, Beccaceci M, et al. Quantum teleportation with dissimilar quantum dots over a hybrid quantum network. Nature Communications. 2025;16(1). doi:10.1038/s41467-025-65911-9","ieee":"A. Laneve et al., “Quantum teleportation with dissimilar quantum dots over a hybrid quantum network,” Nature Communications, vol. 16, no. 1, Art. no. 10028, 2025, doi: 10.1038/s41467-025-65911-9.","chicago":"Laneve, Alessandro, Giuseppe Ronco, Mattia Beccaceci, Paolo Barigelli, Francesco Salusti, Nicolas Claro-Rodriguez, Giorgio De Pascalis, et al. “Quantum Teleportation with Dissimilar Quantum Dots over a Hybrid Quantum Network.” Nature Communications 16, no. 1 (2025). https://doi.org/10.1038/s41467-025-65911-9."},"publication_identifier":{"issn":["2041-1723"]},"publication_status":"published","issue":"1","title":"Quantum teleportation with dissimilar quantum dots over a hybrid quantum network","doi":"10.1038/s41467-025-65911-9","date_updated":"2025-12-17T11:36:14Z","publisher":"Springer Science and Business Media LLC","volume":16,"author":[{"first_name":"Alessandro","full_name":"Laneve, Alessandro","last_name":"Laneve"},{"first_name":"Giuseppe","full_name":"Ronco, Giuseppe","last_name":"Ronco"},{"first_name":"Mattia","full_name":"Beccaceci, Mattia","last_name":"Beccaceci"},{"full_name":"Barigelli, Paolo","last_name":"Barigelli","first_name":"Paolo"},{"last_name":"Salusti","full_name":"Salusti, Francesco","id":"94793","first_name":"Francesco"},{"full_name":"Claro-Rodriguez, Nicolas","last_name":"Claro-Rodriguez","first_name":"Nicolas"},{"full_name":"De Pascalis, Giorgio","last_name":"De Pascalis","first_name":"Giorgio"},{"last_name":"Suprano","full_name":"Suprano, Alessia","first_name":"Alessia"},{"full_name":"Chiaudano, Leone","last_name":"Chiaudano","first_name":"Leone"},{"last_name":"Schöll","full_name":"Schöll, Eva","first_name":"Eva"},{"first_name":"Lukas","last_name":"Hanschke","full_name":"Hanschke, Lukas"},{"first_name":"Tobias M.","last_name":"Krieger","full_name":"Krieger, Tobias M."},{"last_name":"Buchinger","full_name":"Buchinger, Quirin","first_name":"Quirin"},{"first_name":"Saimon F.","last_name":"Covre da Silva","full_name":"Covre da Silva, Saimon F."},{"first_name":"Julia","full_name":"Neuwirth, Julia","last_name":"Neuwirth"},{"last_name":"Stroj","full_name":"Stroj, Sandra","first_name":"Sandra"},{"first_name":"Sven","last_name":"Höfling","full_name":"Höfling, Sven"},{"first_name":"Tobias","full_name":"Huber-Loyola, Tobias","last_name":"Huber-Loyola"},{"first_name":"Mario A.","last_name":"Usuga Castaneda","full_name":"Usuga Castaneda, Mario A."},{"first_name":"Gonzalo","last_name":"Carvacho","full_name":"Carvacho, Gonzalo"},{"last_name":"Spagnolo","full_name":"Spagnolo, Nicolò","first_name":"Nicolò"},{"first_name":"Michele B.","last_name":"Rota","full_name":"Rota, Michele B."},{"first_name":"Francesco","full_name":"Basso Basset, Francesco","last_name":"Basso Basset"},{"first_name":"Armando","last_name":"Rastelli","full_name":"Rastelli, Armando"},{"first_name":"Fabio","last_name":"Sciarrino","full_name":"Sciarrino, Fabio"},{"first_name":"Klaus","full_name":"Jöns, Klaus","id":"85353","last_name":"Jöns"},{"last_name":"Trotta","full_name":"Trotta, Rinaldo","first_name":"Rinaldo"}],"date_created":"2025-12-04T12:20:57Z","status":"public","publication":"Nature Communications","type":"journal_article","article_number":"10028","language":[{"iso":"eng"}],"_id":"62861","department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"user_id":"48188"},{"date_created":"2025-12-04T12:03:50Z","author":[{"last_name":"Pennacchietti","full_name":"Pennacchietti, Matteo","first_name":"Matteo"},{"full_name":"Cunard, Brady","last_name":"Cunard","first_name":"Brady"},{"last_name":"Nahar","full_name":"Nahar, Shlok","first_name":"Shlok"},{"last_name":"Zeeshan","full_name":"Zeeshan, Mohd","first_name":"Mohd"},{"full_name":"Gangopadhyay, Sayan","last_name":"Gangopadhyay","first_name":"Sayan"},{"first_name":"Philip J.","full_name":"Poole, Philip J.","last_name":"Poole"},{"first_name":"Dan","last_name":"Dalacu","full_name":"Dalacu, Dan"},{"full_name":"Fognini, Andreas","last_name":"Fognini","first_name":"Andreas"},{"first_name":"Klaus","last_name":"Jöns","full_name":"Jöns, Klaus","id":"85353"},{"first_name":"Val","full_name":"Zwiller, Val","last_name":"Zwiller"},{"first_name":"Thomas","last_name":"Jennewein","full_name":"Jennewein, Thomas"},{"full_name":"Lütkenhaus, Norbert","last_name":"Lütkenhaus","first_name":"Norbert"},{"first_name":"Michael E.","last_name":"Reimer","full_name":"Reimer, Michael E."}],"volume":7,"date_updated":"2025-12-04T12:23:54Z","publisher":"Springer Science and Business Media LLC","doi":"10.1038/s42005-024-01547-3","title":"Oscillating photonic Bell state from a semiconductor quantum dot for quantum key distribution","issue":"1","publication_status":"published","publication_identifier":{"issn":["2399-3650"]},"citation":{"apa":"Pennacchietti, M., Cunard, B., Nahar, S., Zeeshan, M., Gangopadhyay, S., Poole, P. J., Dalacu, D., Fognini, A., Jöns, K., Zwiller, V., Jennewein, T., Lütkenhaus, N., & Reimer, M. E. (2024). Oscillating photonic Bell state from a semiconductor quantum dot for quantum key distribution. Communications Physics, 7(1), Article 62. https://doi.org/10.1038/s42005-024-01547-3","short":"M. Pennacchietti, B. Cunard, S. Nahar, M. Zeeshan, S. Gangopadhyay, P.J. Poole, D. Dalacu, A. Fognini, K. Jöns, V. Zwiller, T. Jennewein, N. Lütkenhaus, M.E. Reimer, Communications Physics 7 (2024).","mla":"Pennacchietti, Matteo, et al. “Oscillating Photonic Bell State from a Semiconductor Quantum Dot for Quantum Key Distribution.” Communications Physics, vol. 7, no. 1, 62, Springer Science and Business Media LLC, 2024, doi:10.1038/s42005-024-01547-3.","bibtex":"@article{Pennacchietti_Cunard_Nahar_Zeeshan_Gangopadhyay_Poole_Dalacu_Fognini_Jöns_Zwiller_et al._2024, title={Oscillating photonic Bell state from a semiconductor quantum dot for quantum key distribution}, volume={7}, DOI={10.1038/s42005-024-01547-3}, number={162}, journal={Communications Physics}, publisher={Springer Science and Business Media LLC}, author={Pennacchietti, Matteo and Cunard, Brady and Nahar, Shlok and Zeeshan, Mohd and Gangopadhyay, Sayan and Poole, Philip J. and Dalacu, Dan and Fognini, Andreas and Jöns, Klaus and Zwiller, Val and et al.}, year={2024} }","ieee":"M. Pennacchietti et al., “Oscillating photonic Bell state from a semiconductor quantum dot for quantum key distribution,” Communications Physics, vol. 7, no. 1, Art. no. 62, 2024, doi: 10.1038/s42005-024-01547-3.","chicago":"Pennacchietti, Matteo, Brady Cunard, Shlok Nahar, Mohd Zeeshan, Sayan Gangopadhyay, Philip J. Poole, Dan Dalacu, et al. “Oscillating Photonic Bell State from a Semiconductor Quantum Dot for Quantum Key Distribution.” Communications Physics 7, no. 1 (2024). https://doi.org/10.1038/s42005-024-01547-3.","ama":"Pennacchietti M, Cunard B, Nahar S, et al. Oscillating photonic Bell state from a semiconductor quantum dot for quantum key distribution. Communications Physics. 2024;7(1). doi:10.1038/s42005-024-01547-3"},"intvolume":" 7","year":"2024","user_id":"48188","department":[{"_id":"623"}],"_id":"62849","language":[{"iso":"eng"}],"article_number":"62","type":"journal_article","publication":"Communications Physics","status":"public","abstract":[{"text":"AbstractAn on-demand source of bright entangled photon pairs is desirable for quantum key distribution (QKD) and quantum repeaters. The leading candidate to generate such pairs is based on spontaneous parametric down-conversion (SPDC) in non-linear crystals. However, its pair extraction efficiency is limited to 0.1% when operating at near-unity fidelity due to multiphoton emission at high brightness. Quantum dots in photonic nanostructures can in principle overcome this limit, but the devices with high entanglement fidelity (99%) have low pair extraction efficiency (0.01%). Here, we show a measured peak entanglement fidelity of 97.5% ± 0.8% and pair extraction efficiency of 0.65% from an InAsP quantum dot in an InP photonic nanowire waveguide. We show that the generated oscillating two-photon Bell state can establish a secure key for peer-to-peer QKD. Using our time-resolved QKD scheme alleviates the need to remove the quantum dot energy splitting of the intermediate exciton states in the biexciton-exciton cascade.","lang":"eng"}]},{"editor":[{"first_name":"Philip R.","full_name":"Hemmer, Philip R.","last_name":"Hemmer"},{"first_name":"Alan L.","last_name":"Migdall","full_name":"Migdall, Alan L."}],"status":"public","type":"conference","publication":"Quantum Computing, Communication, and Simulation IV","language":[{"iso":"eng"}],"_id":"62852","user_id":"48188","department":[{"_id":"623"}],"year":"2024","citation":{"chicago":"Gyger, Samuel, Max Tao, Marco Colangelo, Ian Christen, Hugo Larocque, Julian Zichi, Lucas Schweickert, et al. “Integrating Superconducting Single-Photon Detectors into Active Photonic Circuits.” In Quantum Computing, Communication, and Simulation IV, edited by Philip R. Hemmer and Alan L. Migdall. SPIE, 2024. https://doi.org/10.1117/12.3009736.","ieee":"S. Gyger et al., “Integrating superconducting single-photon detectors into active photonic circuits,” in Quantum Computing, Communication, and Simulation IV, 2024, doi: 10.1117/12.3009736.","ama":"Gyger S, Tao M, Colangelo M, et al. Integrating superconducting single-photon detectors into active photonic circuits. In: Hemmer PR, Migdall AL, eds. Quantum Computing, Communication, and Simulation IV. SPIE; 2024. doi:10.1117/12.3009736","apa":"Gyger, S., Tao, M., Colangelo, M., Christen, I., Larocque, H., Zichi, J., Schweickert, L., Elshaari, A., Steinhauer, S., Covre da Silva, S., Rastelli, A., Sattari, H., Chong, G., Pétremand, Y., Prieto, I., Yu, Y., Ghadimi, A., Englund, D., Jöns, K., … Errando Herranz, C. (2024). Integrating superconducting single-photon detectors into active photonic circuits. In P. R. Hemmer & A. L. Migdall (Eds.), Quantum Computing, Communication, and Simulation IV. SPIE. https://doi.org/10.1117/12.3009736","mla":"Gyger, Samuel, et al. “Integrating Superconducting Single-Photon Detectors into Active Photonic Circuits.” Quantum Computing, Communication, and Simulation IV, edited by Philip R. Hemmer and Alan L. Migdall, SPIE, 2024, doi:10.1117/12.3009736.","bibtex":"@inproceedings{Gyger_Tao_Colangelo_Christen_Larocque_Zichi_Schweickert_Elshaari_Steinhauer_Covre da Silva_et al._2024, title={Integrating superconducting single-photon detectors into active photonic circuits}, DOI={10.1117/12.3009736}, booktitle={Quantum Computing, Communication, and Simulation IV}, publisher={SPIE}, author={Gyger, Samuel and Tao, Max and Colangelo, Marco and Christen, Ian and Larocque, Hugo and Zichi, Julian and Schweickert, Lucas and Elshaari, Ali and Steinhauer, Stephan and Covre da Silva, Saimon and et al.}, editor={Hemmer, Philip R. and Migdall, Alan L.}, year={2024} }","short":"S. Gyger, M. Tao, M. Colangelo, I. Christen, H. Larocque, J. Zichi, L. Schweickert, A. Elshaari, S. Steinhauer, S. Covre da Silva, A. Rastelli, H. Sattari, G. Chong, Y. Pétremand, I. Prieto, Y. Yu, A. Ghadimi, D. Englund, K. Jöns, V. Zwiller, C. Errando Herranz, in: P.R. Hemmer, A.L. Migdall (Eds.), Quantum Computing, Communication, and Simulation IV, SPIE, 2024."},"publication_status":"published","title":"Integrating superconducting single-photon detectors into active photonic circuits","doi":"10.1117/12.3009736","date_updated":"2025-12-04T12:24:04Z","publisher":"SPIE","date_created":"2025-12-04T12:07:37Z","author":[{"first_name":"Samuel","full_name":"Gyger, Samuel","last_name":"Gyger"},{"full_name":"Tao, Max","last_name":"Tao","first_name":"Max"},{"first_name":"Marco","last_name":"Colangelo","full_name":"Colangelo, Marco"},{"last_name":"Christen","full_name":"Christen, Ian","first_name":"Ian"},{"first_name":"Hugo","full_name":"Larocque, Hugo","last_name":"Larocque"},{"first_name":"Julian","full_name":"Zichi, Julian","last_name":"Zichi"},{"full_name":"Schweickert, Lucas","last_name":"Schweickert","first_name":"Lucas"},{"full_name":"Elshaari, Ali","last_name":"Elshaari","first_name":"Ali"},{"first_name":"Stephan","full_name":"Steinhauer, Stephan","last_name":"Steinhauer"},{"first_name":"Saimon","full_name":"Covre da Silva, Saimon","last_name":"Covre da Silva"},{"first_name":"Armando","last_name":"Rastelli","full_name":"Rastelli, Armando"},{"first_name":"Hamed","full_name":"Sattari, Hamed","last_name":"Sattari"},{"last_name":"Chong","full_name":"Chong, Gregory","first_name":"Gregory"},{"first_name":"Yves","last_name":"Pétremand","full_name":"Pétremand, Yves"},{"last_name":"Prieto","full_name":"Prieto, Ivan","first_name":"Ivan"},{"full_name":"Yu, Yang","last_name":"Yu","first_name":"Yang"},{"first_name":"Amir","full_name":"Ghadimi, Amir","last_name":"Ghadimi"},{"last_name":"Englund","full_name":"Englund, Dirk","first_name":"Dirk"},{"last_name":"Jöns","full_name":"Jöns, Klaus","id":"85353","first_name":"Klaus"},{"last_name":"Zwiller","full_name":"Zwiller, Val","first_name":"Val"},{"first_name":"Carlos","full_name":"Errando Herranz, Carlos","last_name":"Errando Herranz"}]},{"type":"conference","publication":"Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII","status":"public","editor":[{"first_name":"Ursula","last_name":"Keller","full_name":"Keller, Ursula"}],"user_id":"48188","department":[{"_id":"623"}],"_id":"62850","language":[{"iso":"eng"}],"publication_status":"published","citation":{"chicago":"Mikitta, Telsche, Ana Cutuk, Michael Jetter, Peter Michler, Klaus Jöns, and Hermann Kahle. “Membrane External-Cavity Surface-Emitting Lasers (MECSELs) Optimized for Double-Side-Pumping: A First Fundamental Single-Side Pumping Characterization.” In Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII, edited by Ursula Keller. SPIE, 2024. https://doi.org/10.1117/12.3002481.","ieee":"T. Mikitta, A. Cutuk, M. Jetter, P. Michler, K. Jöns, and H. Kahle, “Membrane external-cavity surface-emitting lasers (MECSELs) optimized for double-side-pumping: a first fundamental single-side pumping characterization,” in Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII, 2024, doi: 10.1117/12.3002481.","ama":"Mikitta T, Cutuk A, Jetter M, Michler P, Jöns K, Kahle H. Membrane external-cavity surface-emitting lasers (MECSELs) optimized for double-side-pumping: a first fundamental single-side pumping characterization. In: Keller U, ed. Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII. SPIE; 2024. doi:10.1117/12.3002481","apa":"Mikitta, T., Cutuk, A., Jetter, M., Michler, P., Jöns, K., & Kahle, H. (2024). Membrane external-cavity surface-emitting lasers (MECSELs) optimized for double-side-pumping: a first fundamental single-side pumping characterization. In U. Keller (Ed.), Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII. SPIE. https://doi.org/10.1117/12.3002481","mla":"Mikitta, Telsche, et al. “Membrane External-Cavity Surface-Emitting Lasers (MECSELs) Optimized for Double-Side-Pumping: A First Fundamental Single-Side Pumping Characterization.” Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII, edited by Ursula Keller, SPIE, 2024, doi:10.1117/12.3002481.","short":"T. Mikitta, A. Cutuk, M. Jetter, P. Michler, K. Jöns, H. Kahle, in: U. Keller (Ed.), Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII, SPIE, 2024.","bibtex":"@inproceedings{Mikitta_Cutuk_Jetter_Michler_Jöns_Kahle_2024, title={Membrane external-cavity surface-emitting lasers (MECSELs) optimized for double-side-pumping: a first fundamental single-side pumping characterization}, DOI={10.1117/12.3002481}, booktitle={Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII}, publisher={SPIE}, author={Mikitta, Telsche and Cutuk, Ana and Jetter, Michael and Michler, Peter and Jöns, Klaus and Kahle, Hermann}, editor={Keller, Ursula}, year={2024} }"},"year":"2024","author":[{"first_name":"Telsche","last_name":"Mikitta","full_name":"Mikitta, Telsche"},{"full_name":"Cutuk, Ana","last_name":"Cutuk","first_name":"Ana"},{"first_name":"Michael","last_name":"Jetter","full_name":"Jetter, Michael"},{"last_name":"Michler","full_name":"Michler, Peter","first_name":"Peter"},{"first_name":"Klaus","full_name":"Jöns, Klaus","id":"85353","last_name":"Jöns"},{"first_name":"Hermann","last_name":"Kahle","full_name":"Kahle, Hermann"}],"date_created":"2025-12-04T12:06:23Z","date_updated":"2025-12-04T12:24:00Z","publisher":"SPIE","doi":"10.1117/12.3002481","title":"Membrane external-cavity surface-emitting lasers (MECSELs) optimized for double-side-pumping: a first fundamental single-side pumping characterization"},{"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"},{"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":"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","date_updated":"2025-12-05T13:39:01Z","publisher":"Wiley","date_created":"2024-06-24T09:46:25Z","author":[{"full_name":"Groll, Maja","last_name":"Groll","first_name":"Maja"},{"id":"46952","full_name":"Bürger, Julius","last_name":"Bürger","first_name":"Julius"},{"full_name":"Caltzidis, Ioannis","id":"87911","last_name":"Caltzidis","first_name":"Ioannis"},{"first_name":"Klaus D.","full_name":"Jöns, Klaus D.","id":"85353","last_name":"Jöns"},{"first_name":"Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt","id":"468","full_name":"Schmidt, Wolf Gero"},{"first_name":"Uwe","id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"first_name":"Jörg K. N.","full_name":"Lindner, Jörg K. N.","id":"20797","last_name":"Lindner"}],"year":"2024","citation":{"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","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} }","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.","short":"M. Groll, J. Bürger, I. Caltzidis, K.D. Jöns, W.G. Schmidt, U. Gerstmann, J.K.N. Lindner, Small (2024).","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","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."},"publication_status":"published","publication_identifier":{"issn":["1613-6810","1613-6829"]}},{"publisher":"Wiley","date_created":"2025-12-04T12:08:46Z","title":"Coherent Swing‐Up Excitation for Semiconductor Quantum Dots","issue":"4","year":"2024","language":[{"iso":"eng"}],"publication":"Advanced Quantum Technologies","abstract":[{"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.","lang":"eng"}],"date_updated":"2025-12-11T13:00:06Z","volume":7,"author":[{"last_name":"Boos","full_name":"Boos, Katarina","first_name":"Katarina"},{"first_name":"Friedrich","full_name":"Sbresny, Friedrich","last_name":"Sbresny"},{"first_name":"Sang Kyu","last_name":"Kim","full_name":"Kim, Sang Kyu"},{"full_name":"Kremser, Malte","last_name":"Kremser","first_name":"Malte"},{"first_name":"Hubert","full_name":"Riedl, Hubert","last_name":"Riedl"},{"first_name":"Frederik W.","last_name":"Bopp","full_name":"Bopp, Frederik W."},{"last_name":"Rauhaus","full_name":"Rauhaus, William","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"},{"first_name":"Jonathan J.","full_name":"Finley, Jonathan J.","last_name":"Finley"},{"first_name":"Kai","last_name":"Müller","full_name":"Müller, Kai"},{"full_name":"Hanschke, Lukas","last_name":"Hanschke","first_name":"Lukas"}],"doi":"10.1002/qute.202300359","publication_identifier":{"issn":["2511-9044","2511-9044"]},"publication_status":"published","intvolume":" 7","citation":{"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","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.","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).","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","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.","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."},"_id":"62853","department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"user_id":"48188","article_number":"2300359","type":"journal_article","status":"public"},{"status":"public","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."}],"publication":"arXiv:2409.19167","type":"preprint","language":[{"iso":"eng"}],"department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"user_id":"48188","_id":"62858","external_id":{"arxiv":["2409.19167"]},"citation":{"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} }","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).","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.","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.","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.","ieee":"L. Hanschke et al., “Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots,” arXiv:2409.19167. 2024."},"year":"2024","title":"Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots","date_created":"2025-12-04T12:16:58Z","author":[{"first_name":"L.","last_name":"Hanschke","full_name":"Hanschke, L."},{"last_name":"Bracht","full_name":"Bracht, T. K.","first_name":"T. K."},{"full_name":"Schöll, E.","last_name":"Schöll","first_name":"E."},{"full_name":"Bauch, David","id":"44172","last_name":"Bauch","first_name":"David"},{"full_name":"Berger, Eva","last_name":"Berger","first_name":"Eva"},{"first_name":"Patricia","full_name":"Kallert, Patricia","last_name":"Kallert"},{"last_name":"Peter","full_name":"Peter, M.","first_name":"M."},{"last_name":"Garcia","full_name":"Garcia, A. J.","first_name":"A. J."},{"last_name":"Silva","full_name":"Silva, S. F. Covre da","first_name":"S. F. Covre da"},{"full_name":"Manna, S.","last_name":"Manna","first_name":"S."},{"full_name":"Rastelli, A.","last_name":"Rastelli","first_name":"A."},{"first_name":"Stefan","full_name":"Schumacher, Stefan","id":"27271","orcid":"0000-0003-4042-4951","last_name":"Schumacher"},{"first_name":"D. E.","full_name":"Reiter, D. E.","last_name":"Reiter"},{"id":"85353","full_name":"Jöns, Klaus","last_name":"Jöns","first_name":"Klaus"}],"date_updated":"2025-12-11T12:54:41Z"},{"type":"preprint","citation":{"ama":"Jöns K. Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities. Published online 2024.","ieee":"K. Jöns, “Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities.” 2024.","chicago":"Jöns, Klaus. “Purcell-Enhanced Single-Photon Emission from InAs/GaAs Quantum Dots Coupled to Broadband Cylindrical Nanocavities,” 2024.","apa":"Jöns, K. (2024). Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities.","short":"K. Jöns, (2024).","mla":"Jöns, Klaus. Purcell-Enhanced Single-Photon Emission from InAs/GaAs Quantum Dots Coupled to Broadband Cylindrical Nanocavities. 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","year":"2024","abstract":[{"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.","lang":"eng"}],"user_id":"48188","date_created":"2025-12-04T12:13:39Z","author":[{"first_name":"Klaus","last_name":"Jöns","full_name":"Jöns, Klaus","id":"85353"}],"department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"date_updated":"2025-12-11T12:58:57Z","_id":"62856","language":[{"iso":"eng"}],"title":"Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities"},{"year":"2023","title":"On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs","date_created":"2023-11-03T10:07:38Z","publisher":"Wiley","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","language":[{"iso":"eng"}],"keyword":["tet_topic_qd"],"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","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.","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.","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.","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} }","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":[{"status":"public","id":"43246","relation":"earlier_version"}]},"publication_identifier":{"issn":["2511-9044","2511-9044"]},"publication_status":"published","doi":"10.1002/qute.202300142","main_file_link":[{"open_access":"1","url":"https://onlinelibrary.wiley.com/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","last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158","first_name":"Jens"},{"first_name":"Stefan","id":"27271","full_name":"Schumacher, Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951"}],"oa":"1","date_updated":"2023-12-21T10:41:17Z","status":"public","type":"journal_article","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"623"}],"user_id":"158","_id":"48599","project":[{"grant_number":"231447078","name":"TRR 142 - C09: TRR 142 - Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen (C09*)","_id":"173"},{"grant_number":"231447078","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}]},{"keyword":["tet_topic_phc","tet_topic_qd"],"language":[{"iso":"eng"}],"_id":"43246","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"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"},{"grant_number":"231447078","_id":"53","name":"TRR 142: TRR 142"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"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","abstract":[{"lang":"eng","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 $1550\\,\\mathrm{nm}$."}],"status":"public","type":"preprint","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"}],"oa":"1","date_updated":"2023-12-21T10:41:17Z","date_created":"2023-03-31T13:22:05Z","author":[{"last_name":"Bauch","full_name":"Bauch, David","first_name":"David"},{"full_name":"Siebert, Dustin","last_name":"Siebert","first_name":"Dustin"},{"first_name":"Klaus","last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens","first_name":"Jens"},{"full_name":"Schumacher, Stefan","id":"27271","orcid":"0000-0003-4042-4951","last_name":"Schumacher","first_name":"Stefan"}],"year":"2023","citation":{"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} }","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.","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.","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.","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."},"related_material":{"record":[{"status":"public","id":"48599","relation":"later_version"}]}},{"department":[{"_id":"642"}],"user_id":"14931","external_id":{"arxiv":["2301.10326"]},"_id":"42049","language":[{"iso":"eng"}],"publication":"arXiv:2301.10326","type":"preprint","status":"public","abstract":[{"lang":"eng","text":"Long-range quantum communication requires the development of in-out\r\nlight-matter interfaces to achieve a quantum advantage in entanglement\r\ndistribution. Ideally, these quantum interconnections should be as fast as\r\npossible to achieve high-rate entangled qubits distribution. Here, we\r\ndemonstrate the coherent quanta exchange between single photons generated\r\non-demand from a GaAs quantum dot and atomic ensemble in a $^{87}$Rb vapor\r\nquantum memory. Through an open quantum system analysis, we demonstrate the\r\nmapping between the quantized electric field of photons and the coherence of\r\nthe atomic ensemble. Our results play a pivotal role in understanding quantum\r\nlight-matter interactions at the short time scales required to build fast\r\nhybrid quantum networks."}],"date_created":"2023-02-13T11:25:45Z","author":[{"last_name":"Cui","full_name":"Cui, Guo-Dong","first_name":"Guo-Dong"},{"full_name":"Schweickert, Lucas","last_name":"Schweickert","first_name":"Lucas"},{"first_name":"Klaus D.","full_name":"Jöns, Klaus D.","id":"85353","last_name":"Jöns"},{"first_name":"Mehdi","full_name":"Namazi, Mehdi","last_name":"Namazi"},{"first_name":"Thomas","last_name":"Lettner","full_name":"Lettner, Thomas"},{"first_name":"Katharina D.","last_name":"Zeuner","full_name":"Zeuner, Katharina D."},{"full_name":"Montaña, Lara Scavuzzo","last_name":"Montaña","first_name":"Lara Scavuzzo"},{"last_name":"Silva","full_name":"Silva, Saimon Filipe Covre da","first_name":"Saimon Filipe Covre da"},{"first_name":"Marcus","full_name":"Reindl, Marcus","last_name":"Reindl"},{"full_name":"Huang, Huiying","last_name":"Huang","first_name":"Huiying"},{"first_name":"Rinaldo","last_name":"Trotta","full_name":"Trotta, Rinaldo"},{"first_name":"Armando","full_name":"Rastelli, Armando","last_name":"Rastelli"},{"first_name":"Val","last_name":"Zwiller","full_name":"Zwiller, Val"},{"full_name":"Figueroa, Eden","last_name":"Figueroa","first_name":"Eden"}],"date_updated":"2023-02-13T11:28:56Z","title":"Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory","citation":{"ama":"Cui G-D, Schweickert L, Jöns KD, et al. Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory. arXiv:230110326. Published online 2023.","ieee":"G.-D. Cui et al., “Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory,” arXiv:2301.10326. 2023.","chicago":"Cui, Guo-Dong, Lucas Schweickert, Klaus D. Jöns, Mehdi Namazi, Thomas Lettner, Katharina D. Zeuner, Lara Scavuzzo Montaña, et al. “Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory.” ArXiv:2301.10326, 2023.","apa":"Cui, G.-D., Schweickert, L., Jöns, K. D., Namazi, M., Lettner, T., Zeuner, K. D., Montaña, L. S., Silva, S. F. C. da, Reindl, M., Huang, H., Trotta, R., Rastelli, A., Zwiller, V., & Figueroa, E. (2023). Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory. In arXiv:2301.10326.","short":"G.-D. Cui, L. Schweickert, K.D. Jöns, M. Namazi, T. Lettner, K.D. Zeuner, L.S. Montaña, S.F.C. da Silva, M. Reindl, H. Huang, R. Trotta, A. Rastelli, V. Zwiller, E. Figueroa, ArXiv:2301.10326 (2023).","mla":"Cui, Guo-Dong, et al. “Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory.” ArXiv:2301.10326, 2023.","bibtex":"@article{Cui_Schweickert_Jöns_Namazi_Lettner_Zeuner_Montaña_Silva_Reindl_Huang_et al._2023, title={Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory}, journal={arXiv:2301.10326}, author={Cui, Guo-Dong and Schweickert, Lucas and Jöns, Klaus D. and Namazi, Mehdi and Lettner, Thomas and Zeuner, Katharina D. and Montaña, Lara Scavuzzo and Silva, Saimon Filipe Covre da and Reindl, Marcus and Huang, Huiying and et al.}, year={2023} }"},"year":"2023"},{"issue":"1","year":"2023","date_created":"2025-09-12T11:11:56Z","publisher":"Wiley","title":"On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs","publication":"Advanced Quantum Technologies","abstract":[{"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.","lang":"eng"}],"language":[{"iso":"eng"}],"publication_status":"published","publication_identifier":{"issn":["2511-9044","2511-9044"]},"citation":{"chicago":"Bauch, David, Dustin Siebert, Klaus D. Jöns, Jens Förstner, and Stefan Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” Advanced Quantum Technologies 7, no. 1 (2023). https://doi.org/10.1002/qute.202300142.","ieee":"D. Bauch, D. Siebert, K. D. Jöns, J. Förstner, and S. Schumacher, “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” Advanced Quantum Technologies, vol. 7, no. 1, Art. no. 2300142, 2023, doi: 10.1002/qute.202300142.","ama":"Bauch D, Siebert D, Jöns KD, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies. 2023;7(1). doi:10.1002/qute.202300142","apa":"Bauch, D., Siebert, D., Jöns, K. D., Förstner, J., & Schumacher, S. (2023). On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies, 7(1), Article 2300142. https://doi.org/10.1002/qute.202300142","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, volume={7}, DOI={10.1002/qute.202300142}, number={12300142}, journal={Advanced Quantum Technologies}, publisher={Wiley}, author={Bauch, David and Siebert, Dustin and Jöns, Klaus D. and Förstner, Jens and Schumacher, Stefan}, year={2023} }","short":"D. Bauch, D. Siebert, K.D. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies 7 (2023).","mla":"Bauch, David, et al. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” Advanced Quantum Technologies, vol. 7, no. 1, 2300142, Wiley, 2023, doi:10.1002/qute.202300142."},"intvolume":" 7","author":[{"last_name":"Bauch","full_name":"Bauch, David","first_name":"David"},{"last_name":"Siebert","full_name":"Siebert, Dustin","first_name":"Dustin"},{"last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus D.","first_name":"Klaus D."},{"full_name":"Förstner, Jens","id":"158","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"},{"full_name":"Schumacher, Stefan","id":"27271","last_name":"Schumacher","orcid":"0000-0003-4042-4951","first_name":"Stefan"}],"volume":7,"date_updated":"2025-09-12T11:16:12Z","doi":"10.1002/qute.202300142","type":"journal_article","status":"public","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"642"},{"_id":"61"},{"_id":"230"},{"_id":"35"},{"_id":"34"},{"_id":"429"},{"_id":"27"},{"_id":"623"}],"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 B","_id":"55"},{"_id":"56","name":"TRR 142 - Project Area C"},{"_id":"167","name":"TRR 142; TP B06: Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems"},{"_id":"173","name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen"},{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"_id":"61252","article_number":"2300142"},{"_id":"36471","user_id":"48188","department":[{"_id":"15"},{"_id":"623"},{"_id":"230"},{"_id":"429"},{"_id":"642"}],"article_number":"610","keyword":["Atomic and Molecular Physics","and Optics"],"language":[{"iso":"eng"}],"type":"journal_article","publication":"Optics Express","abstract":[{"text":"Superconducting nanowire single-photon detectors (SNSPDs) show near unity efficiency, low dark count rate, and short recovery time. Combining these characteristics with temporal control of SNSPDs broadens their applications as in active de-latching for higher dynamic range counting or temporal filtering for pump-probe spectroscopy or LiDAR. To that end, we demonstrate active gating of an SNSPD with a minimum off-to-on rise time of 2.4 ns and a total gate length of 5.0 ns. We show how the rise time depends on the inductance of the detector in combination with the control electronics. The gate window is demonstrated to be fully and freely, electrically tunable up to 500 ns at a repetition rate of 1.0 MHz, as well as ungated, free-running operation. Control electronics to generate the gating are mounted on the 2.3 K stage of a closed-cycle sorption cryostat, while the detector is operated on the cold stage at 0.8 K. We show that the efficiency and timing jitter of the detector is not altered during the on-time of the gating window. We exploit gated operation to demonstrate a method to increase in the photon counting dynamic range by a factor 11.2, as well as temporal filtering of a strong pump in an emulated pump-probe experiment.","lang":"eng"}],"status":"public","date_updated":"2025-12-11T13:05:14Z","publisher":"Optica Publishing Group","date_created":"2023-01-12T14:46:40Z","author":[{"full_name":"Hummel, Thomas","id":"83846","orcid":"0000-0001-8627-2119","last_name":"Hummel","first_name":"Thomas"},{"first_name":"Alex","full_name":"Widhalm, Alex","last_name":"Widhalm"},{"first_name":"Jan Philipp","last_name":"Höpker","full_name":"Höpker, Jan Philipp","id":"33913"},{"full_name":"Jöns, Klaus","id":"85353","last_name":"Jöns","first_name":"Klaus"},{"first_name":"Jin","last_name":"Chang","full_name":"Chang, Jin"},{"first_name":"Andreas","full_name":"Fognini, Andreas","last_name":"Fognini"},{"first_name":"Stephan","last_name":"Steinhauer","full_name":"Steinhauer, Stephan"},{"full_name":"Zwiller, Val","last_name":"Zwiller","first_name":"Val"},{"full_name":"Zrenner, Artur","id":"606","last_name":"Zrenner","orcid":"0000-0002-5190-0944","first_name":"Artur"},{"first_name":"Tim","id":"49683","full_name":"Bartley, Tim","last_name":"Bartley"}],"volume":31,"title":"Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry","doi":"10.1364/oe.472058","publication_status":"published","publication_identifier":{"issn":["1094-4087"]},"issue":"1","year":"2023","citation":{"ieee":"T. Hummel et al., “Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry,” Optics Express, vol. 31, no. 1, Art. no. 610, 2023, doi: 10.1364/oe.472058.","chicago":"Hummel, Thomas, Alex Widhalm, Jan Philipp Höpker, Klaus Jöns, Jin Chang, Andreas Fognini, Stephan Steinhauer, Val Zwiller, Artur Zrenner, and Tim Bartley. “Nanosecond Gating of Superconducting Nanowire Single-Photon Detectors Using Cryogenic Bias Circuitry.” Optics Express 31, no. 1 (2023). https://doi.org/10.1364/oe.472058.","ama":"Hummel T, Widhalm A, Höpker JP, et al. Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry. Optics Express. 2023;31(1). doi:10.1364/oe.472058","apa":"Hummel, T., Widhalm, A., Höpker, J. P., Jöns, K., Chang, J., Fognini, A., Steinhauer, S., Zwiller, V., Zrenner, A., & Bartley, T. (2023). Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry. Optics Express, 31(1), Article 610. https://doi.org/10.1364/oe.472058","bibtex":"@article{Hummel_Widhalm_Höpker_Jöns_Chang_Fognini_Steinhauer_Zwiller_Zrenner_Bartley_2023, title={Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry}, volume={31}, DOI={10.1364/oe.472058}, number={1610}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Hummel, Thomas and Widhalm, Alex and Höpker, Jan Philipp and Jöns, Klaus and Chang, Jin and Fognini, Andreas and Steinhauer, Stephan and Zwiller, Val and Zrenner, Artur and Bartley, Tim}, year={2023} }","short":"T. Hummel, A. Widhalm, J.P. Höpker, K. Jöns, J. Chang, A. Fognini, S. Steinhauer, V. Zwiller, A. Zrenner, T. Bartley, Optics Express 31 (2023).","mla":"Hummel, Thomas, et al. “Nanosecond Gating of Superconducting Nanowire Single-Photon Detectors Using Cryogenic Bias Circuitry.” Optics Express, vol. 31, no. 1, 610, Optica Publishing Group, 2023, doi:10.1364/oe.472058."},"intvolume":" 31"},{"year":"2022","citation":{"ama":"Sbresny F, Hanschke L, Schöll E, et al. Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System. 2022;128.","ieee":"F. Sbresny et al., “Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System,” vol. 128. 2022.","chicago":"Sbresny, F, L Hanschke, E Schöll, W Rauhaus, B Scaparra, K Boos, E.Zubizarreta Casalengua, et al. “Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System.” Phys. Rev. Lett, 2022.","apa":"Sbresny, F., Hanschke, L., Schöll, E., Rauhaus, W., Scaparra, B., Boos, K., Casalengua, E. Z., H. Riedl, H., Valle, E. D., Finley, J. J., Jöns, K. D., & Müller, K. (2022). Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System (No. 093603; Vol. 128).","short":"F. Sbresny, L. Hanschke, E. Schöll, W. Rauhaus, B. Scaparra, K. Boos, E.Z. Casalengua, H. H. Riedl, E.D. Valle, J.J. Finley, K.D. Jöns, K. Müller, 128 (2022).","mla":"Sbresny, F., et al. Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System. 093603, 2022.","bibtex":"@article{Sbresny_ Hanschke_Schöll_Rauhaus_Scaparra_Boos_Casalengua_H. Riedl_Valle_Finley_et al._2022, series={Phys. Rev. Lett}, title={Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System}, volume={128}, number={093603}, author={Sbresny, F and Hanschke, L and Schöll, E and Rauhaus, W and Scaparra, B and Boos, K and Casalengua, E.Zubizarreta and H. Riedl, H and Valle, E Del and Finley, J.J and et al.}, year={2022}, collection={Phys. Rev. Lett} }"},"intvolume":" 128","publication_status":"published","title":"Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System","date_updated":"2023-02-13T08:47:39Z","author":[{"first_name":"F","full_name":"Sbresny, F","last_name":"Sbresny"},{"full_name":" Hanschke, L","last_name":" Hanschke","first_name":"L"},{"full_name":"Schöll, E","last_name":"Schöll","first_name":"E"},{"first_name":"W","full_name":"Rauhaus, W","last_name":"Rauhaus"},{"last_name":"Scaparra","full_name":"Scaparra, B","first_name":"B"},{"first_name":"K","last_name":"Boos","full_name":"Boos, K"},{"first_name":"E.Zubizarreta","full_name":"Casalengua, E.Zubizarreta","last_name":"Casalengua"},{"last_name":"H. Riedl","full_name":"H. Riedl, H","first_name":"H"},{"last_name":"Valle","full_name":"Valle, E Del","first_name":"E Del"},{"full_name":"Finley, J.J","last_name":"Finley","first_name":"J.J"},{"last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus D.","first_name":"Klaus D."},{"last_name":"Müller","full_name":"Müller, K","first_name":"K"}],"date_created":"2023-02-07T19:30:06Z","volume":128,"status":"public","type":"conference","article_number":"093603","language":[{"iso":"ger"}],"_id":"41879","user_id":"71124","series_title":"Phys. Rev. Lett","department":[{"_id":"623"}]},{"year":"2022","citation":{"bibtex":"@article{Turunen_Brotons-Gisbert_ Dai_Wang_Scerri_Bonato_Jöns_Sun_Gerardot_2022, series={Nature Reviews Physics }, title={Quantum photonics with layered 2D materials}, volume={4}, number={4}, author={Turunen, M and Brotons-Gisbert, M and Dai, Y and Wang, Y and Scerri, E and Bonato, C and Jöns, Klaus D. and Sun, Z and Gerardot, B.D}, year={2022}, pages={219–236}, collection={Nature Reviews Physics } }","mla":"Turunen, M., et al. Quantum photonics with layered 2D materials. no. 4, 2022, pp. 219–36.","short":"M. Turunen, M. Brotons-Gisbert, Y. Dai, Y. Wang, E. Scerri, C. Bonato, K.D. Jöns, Z. Sun, B.D. Gerardot, 4 (2022) 219–236.","apa":"Turunen, M., Brotons-Gisbert, M., Dai, Y., Wang, Y., Scerri, E., Bonato, C., Jöns, K. D., Sun, Z., & Gerardot, B. D. (2022). Quantum photonics with layered 2D materials (Vol. 4, Issue 4, pp. 219–236).","ama":"Turunen M, Brotons-Gisbert M, Dai Y, et al. Quantum photonics with layered 2D materials. 2022;4(4):219-236.","chicago":"Turunen, M, M Brotons-Gisbert, Y Dai, Y Wang, E Scerri, C Bonato, Klaus D. Jöns, Z Sun, and B.D Gerardot. “Quantum photonics with layered 2D materials.” Nature Reviews Physics , 2022.","ieee":"M. Turunen et al., “Quantum photonics with layered 2D materials,” vol. 4, no. 4. pp. 219–236, 2022."},"intvolume":" 4","page":"219-236","publication_status":"published","issue":"4","title":"Quantum photonics with layered 2D materials","date_updated":"2023-02-13T08:47:40Z","date_created":"2023-02-07T19:36:21Z","author":[{"first_name":"M","full_name":"Turunen, M","last_name":"Turunen"},{"last_name":"Brotons-Gisbert","full_name":"Brotons-Gisbert, M","first_name":"M"},{"first_name":"Y","last_name":" Dai","full_name":" Dai, Y"},{"last_name":"Wang","full_name":"Wang, Y","first_name":"Y"},{"full_name":"Scerri, E","last_name":"Scerri","first_name":"E"},{"last_name":"Bonato","full_name":"Bonato, C","first_name":"C"},{"full_name":"Jöns, Klaus D.","id":"85353","last_name":"Jöns","first_name":"Klaus D."},{"full_name":"Sun, Z","last_name":"Sun","first_name":"Z"},{"first_name":"B.D","last_name":"Gerardot","full_name":"Gerardot, B.D"}],"volume":4,"status":"public","type":"conference","language":[{"iso":"ger"}],"_id":"41880","user_id":"71124","series_title":"Nature Reviews Physics ","department":[{"_id":"623"}]},{"_id":"41881","series_title":"Nature Reviews Physics ","user_id":"71124","department":[{"_id":"623"}],"language":[{"iso":"ger"}],"type":"conference","status":"public","date_updated":"2023-02-13T08:48:29Z","date_created":"2023-02-07T19:45:56Z","author":[{"last_name":"Pelucchi","full_name":"Pelucchi, E","first_name":"E"},{"full_name":"Fagas, G","last_name":"Fagas","first_name":"G"},{"full_name":" Aharonovich, I","last_name":" Aharonovich","first_name":"I"},{"first_name":"D","last_name":"Englund","full_name":"Englund, D"},{"last_name":"Figueroa","full_name":"Figueroa, E","first_name":"E"},{"last_name":"Gong","full_name":"Gong, Q","first_name":"Q"},{"full_name":"Hannes, H","last_name":"Hannes","first_name":"H"},{"last_name":"Liu","full_name":"Liu, J","first_name":"J"},{"first_name":"C-Y","last_name":"Lu","full_name":"Lu, C-Y"},{"first_name":"N","last_name":"Matsuda","full_name":"Matsuda, N"},{"first_name":"J.W","full_name":"Pan, J.W","last_name":"Pan"},{"first_name":"F","full_name":"Schreck, F","last_name":"Schreck"},{"last_name":"Sciarrino","full_name":"Sciarrino, F","first_name":"F"},{"last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263","first_name":"Christine"},{"first_name":"J","full_name":"Wang, J","last_name":"Wang"},{"last_name":"Jöns","full_name":"Jöns, Klaus D.","id":"85353","first_name":"Klaus D."}],"volume":4,"title":"The potential and global outlook of integrated photonics for quantum technologi","publication_status":"published","issue":"3","year":"2022","citation":{"apa":"Pelucchi, E., Fagas, G., Aharonovich, I., Englund, D., Figueroa, E., Gong, Q., Hannes, H., Liu, J., Lu, C.-Y., Matsuda, N., Pan, J. W., Schreck, F., Sciarrino, F., Silberhorn, C., Wang, J., & Jöns, K. D. (2022). The potential and global outlook of integrated photonics for quantum technologi (Vol. 4, Issue 3, pp. 194–208).","mla":"Pelucchi, E., et al. The potential and global outlook of integrated photonics for quantum technologi. no. 3, 2022, pp. 194–208.","bibtex":"@article{Pelucchi_Fagas_ Aharonovich_Englund_Figueroa_Gong_Hannes_Liu_Lu_Matsuda_et al._2022, series={Nature Reviews Physics }, title={The potential and global outlook of integrated photonics for quantum technologi}, volume={4}, number={3}, author={Pelucchi, E and Fagas, G and Aharonovich, I and Englund, D and Figueroa, E and Gong, Q and Hannes, H and Liu, J and Lu, C-Y and Matsuda, N and et al.}, year={2022}, pages={194–208}, collection={Nature Reviews Physics } }","short":"E. Pelucchi, G. Fagas, I. Aharonovich, D. Englund, E. Figueroa, Q. Gong, H. Hannes, J. Liu, C.-Y. Lu, N. Matsuda, J.W. Pan, F. Schreck, F. Sciarrino, C. Silberhorn, J. Wang, K.D. Jöns, 4 (2022) 194–208.","ama":"Pelucchi E, Fagas G, Aharonovich I, et al. The potential and global outlook of integrated photonics for quantum technologi. 2022;4(3):194-208.","chicago":"Pelucchi, E, G Fagas, I Aharonovich, D Englund, E Figueroa, Q Gong, H Hannes, et al. “The potential and global outlook of integrated photonics for quantum technologi.” Nature Reviews Physics , 2022.","ieee":"E. Pelucchi et al., “The potential and global outlook of integrated photonics for quantum technologi,” vol. 4, no. 3. pp. 194–208, 2022."},"intvolume":" 4","page":"194-208"},{"status":"public","type":"journal_article","article_number":"1387","user_id":"16199","department":[{"_id":"15"},{"_id":"297"},{"_id":"230"},{"_id":"429"},{"_id":"27"},{"_id":"623"},{"_id":"170"},{"_id":"35"}],"project":[{"name":"TRR 142: TRR 142","_id":"53"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - A03: TRR 142 - Subproject A03","_id":"60"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"_id":"40523","citation":{"ama":"Jonas B, Heinze DF, Schöll E, et al. Nonlinear down-conversion in a single quantum dot. Nature Communications. 2022;13(1). doi:10.1038/s41467-022-28993-3","chicago":"Jonas, B., Dirk Florian Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” Nature Communications 13, no. 1 (2022). https://doi.org/10.1038/s41467-022-28993-3.","ieee":"B. Jonas et al., “Nonlinear down-conversion in a single quantum dot,” Nature Communications, vol. 13, no. 1, Art. no. 1387, 2022, doi: 10.1038/s41467-022-28993-3.","short":"B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, S. Schumacher, A. Zrenner, Nature Communications 13 (2022).","bibtex":"@article{Jonas_Heinze_Schöll_Kallert_Langer_Krehs_Widhalm_Jöns_Reuter_Schumacher_et al._2022, title={Nonlinear down-conversion in a single quantum dot}, volume={13}, DOI={10.1038/s41467-022-28993-3}, number={11387}, journal={Nature Communications}, publisher={Springer Science and Business Media LLC}, author={Jonas, B. and Heinze, Dirk Florian and Schöll, E. and Kallert, P. and Langer, T. and Krehs, S. and Widhalm, A. and Jöns, Klaus and Reuter, Dirk and Schumacher, Stefan and et al.}, year={2022} }","mla":"Jonas, B., et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” Nature Communications, vol. 13, no. 1, 1387, Springer Science and Business Media LLC, 2022, doi:10.1038/s41467-022-28993-3.","apa":"Jonas, B., Heinze, D. F., Schöll, E., Kallert, P., Langer, T., Krehs, S., Widhalm, A., Jöns, K., Reuter, D., Schumacher, S., & Zrenner, A. (2022). Nonlinear down-conversion in a single quantum dot. Nature Communications, 13(1), Article 1387. https://doi.org/10.1038/s41467-022-28993-3"},"intvolume":" 13","publication_status":"published","publication_identifier":{"issn":["2041-1723"]},"doi":"10.1038/s41467-022-28993-3","author":[{"last_name":"Jonas","full_name":"Jonas, B.","first_name":"B."},{"first_name":"Dirk Florian","last_name":"Heinze","id":"10904","full_name":"Heinze, Dirk Florian"},{"first_name":"E.","full_name":"Schöll, E.","last_name":"Schöll"},{"full_name":"Kallert, P.","last_name":"Kallert","first_name":"P."},{"last_name":"Langer","full_name":"Langer, T.","first_name":"T."},{"first_name":"S.","last_name":"Krehs","full_name":"Krehs, S."},{"first_name":"A.","full_name":"Widhalm, A.","last_name":"Widhalm"},{"id":"85353","full_name":"Jöns, Klaus","last_name":"Jöns","first_name":"Klaus"},{"first_name":"Dirk","last_name":"Reuter","full_name":"Reuter, Dirk","id":"37763"},{"id":"27271","full_name":"Schumacher, Stefan","last_name":"Schumacher","orcid":"0000-0003-4042-4951","first_name":"Stefan"},{"id":"606","full_name":"Zrenner, Artur","last_name":"Zrenner","orcid":"0000-0002-5190-0944","first_name":"Artur"}],"volume":13,"date_updated":"2023-04-20T15:18:31Z","abstract":[{"text":"AbstractTailored nanoscale quantum light sources, matching the specific needs of use cases, are crucial building blocks for photonic quantum technologies. Several different approaches to realize solid-state quantum emitters with high performance have been pursued and different concepts for energy tuning have been established. However, the properties of the emitted photons are always defined by the individual quantum emitter and can therefore not be controlled with full flexibility. Here we introduce an all-optical nonlinear method to tailor and control the single photon emission. We demonstrate a laser-controlled down-conversion process from an excited state of a semiconductor quantum three-level system. Based on this concept, we realize energy tuning and polarization control of the single photon emission with a control-laser field. Our results mark an important step towards tailored single photon emission from a photonic quantum system based on quantum optical principles.","lang":"eng"}],"publication":"Nature Communications","language":[{"iso":"eng"}],"keyword":["General Physics and Astronomy","General Biochemistry","Genetics and Molecular Biology","General Chemistry","Multidisciplinary"],"year":"2022","issue":"1","title":"Nonlinear down-conversion in a single quantum dot","date_created":"2023-01-27T13:41:42Z","publisher":"Springer Science and Business Media LLC"},{"year":"2022","citation":{"ama":"Jonas B, Heinze DF, Schöll E, et al. Nonlinear Down-Conversion in a Single Quantum Dot. LibreCat University; 2022. doi:10.5281/ZENODO.6024228","chicago":"Jonas, Björn, Dirk Florian Heinze, Eva Schöll, Patricia Kallert, Timo Langer, Sebastian Krehs, Alex Widhalm, Klaus Jöns, Dirk Reuter, and Artur Zrenner. Nonlinear Down-Conversion in a Single Quantum Dot. LibreCat University, 2022. https://doi.org/10.5281/ZENODO.6024228.","ieee":"B. Jonas et al., Nonlinear down-conversion in a single quantum dot. LibreCat University, 2022.","apa":"Jonas, B., Heinze, D. F., Schöll, E., Kallert, P., Langer, T., Krehs, S., Widhalm, A., Jöns, K., Reuter, D., & Zrenner, A. (2022). Nonlinear down-conversion in a single quantum dot. LibreCat University. https://doi.org/10.5281/ZENODO.6024228","bibtex":"@book{Jonas_Heinze_Schöll_Kallert_Langer_Krehs_Widhalm_Jöns_Reuter_Zrenner_2022, title={Nonlinear down-conversion in a single quantum dot}, DOI={10.5281/ZENODO.6024228}, publisher={LibreCat University}, author={Jonas, Björn and Heinze, Dirk Florian and Schöll, Eva and Kallert, Patricia and Langer, Timo and Krehs, Sebastian and Widhalm, Alex and Jöns, Klaus and Reuter, Dirk and Zrenner, Artur}, year={2022} }","short":"B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, A. Zrenner, Nonlinear Down-Conversion in a Single Quantum Dot, LibreCat University, 2022.","mla":"Jonas, Björn, et al. Nonlinear Down-Conversion in a Single Quantum Dot. LibreCat University, 2022, doi:10.5281/ZENODO.6024228."},"title":"Nonlinear down-conversion in a single quantum dot","doi":"10.5281/ZENODO.6024228","date_updated":"2023-04-20T15:18:48Z","publisher":"LibreCat University","date_created":"2023-01-26T15:38:28Z","author":[{"first_name":"Björn","full_name":"Jonas, Björn","last_name":"Jonas"},{"first_name":"Dirk Florian","id":"10904","full_name":"Heinze, Dirk Florian","last_name":"Heinze"},{"first_name":"Eva","full_name":"Schöll, Eva","last_name":"Schöll"},{"full_name":"Kallert, Patricia","last_name":"Kallert","first_name":"Patricia"},{"first_name":"Timo","full_name":"Langer, Timo","last_name":"Langer"},{"first_name":"Sebastian","full_name":"Krehs, Sebastian","last_name":"Krehs"},{"last_name":"Widhalm","full_name":"Widhalm, Alex","first_name":"Alex"},{"first_name":"Klaus","last_name":"Jöns","id":"85353","full_name":"Jöns, Klaus"},{"first_name":"Dirk","full_name":"Reuter, Dirk","id":"37763","last_name":"Reuter"},{"full_name":"Zrenner, Artur","id":"606","orcid":"0000-0002-5190-0944","last_name":"Zrenner","first_name":"Artur"}],"status":"public","type":"research_data","project":[{"_id":"53","name":"TRR 142: TRR 142"},{"_id":"54","name":"TRR 142 - A: TRR 142 - Project Area A"},{"name":"TRR 142 - A3: TRR 142 - Subproject A3","_id":"60"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"40428","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"290"},{"_id":"292"},{"_id":"642"},{"_id":"230"},{"_id":"429"},{"_id":"35"}]}]