--- _id: '62860' abstract: - lang: eng 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 " article_number: '1072' author: - first_name: Matheus full_name: Sena, Matheus last_name: Sena - first_name: Mael full_name: Flament, Mael last_name: Flament - first_name: Shane full_name: Andrewski, Shane last_name: Andrewski - 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 full_name: Bello Portmann, Gabriel last_name: Bello Portmann - first_name: Rourke full_name: Sekelsky, Rourke last_name: Sekelsky - first_name: Ralf-Peter full_name: Braun, Ralf-Peter last_name: Braun - first_name: Alexander N. full_name: Craddock, Alexander N. last_name: Craddock - first_name: Maximilian full_name: Schulz, Maximilian last_name: Schulz - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Michaela full_name: Ritter, Michaela last_name: Ritter - first_name: Marc full_name: Geitz, Marc last_name: Geitz - first_name: Oliver full_name: Holschke, Oliver last_name: Holschke - first_name: Mehdi full_name: Namazi, Mehdi last_name: Namazi 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 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 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} }' 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.' 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). date_created: 2025-12-04T12:20:01Z date_updated: 2025-12-04T13:37:02Z department: - _id: '623' - _id: '15' doi: 10.1364/jocn.575396 intvolume: ' 17' issue: '12' language: - iso: eng publication: Journal of Optical Communications and Networking publication_identifier: issn: - 1943-0620 - 1943-0639 publication_status: published publisher: Optica Publishing Group status: public title: High-fidelity quantum entanglement distribution in metropolitan fiber networks with co-propagating classical traffic type: journal_article user_id: '85353' volume: 17 year: '2025' ... --- _id: '62859' 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. article_number: '033296' author: - first_name: Santiago full_name: Bermúdez-Feijóo, Santiago last_name: Bermúdez-Feijóo - 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 full_name: Jöns, Klaus id: '85353' last_name: Jöns citation: 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 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 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} }' 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. 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.' 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. short: S. Bermúdez-Feijóo, E. Zubizarreta Casalengua, K. Müller, K. Jöns, Physical Review Research 7 (2025). date_created: 2025-12-04T12:19:04Z date_updated: 2025-12-11T12:52:24Z department: - _id: '623' - _id: '15' - _id: '429' - _id: '642' doi: 10.1103/jmy9-bd3l intvolume: ' 7' issue: '3' language: - iso: eng publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: Spectral correlations of dynamical resonance fluorescence type: journal_article user_id: '48188' volume: 7 year: '2025' ... --- _id: '62861' article_number: '10028' 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 - first_name: Paolo full_name: Barigelli, Paolo last_name: Barigelli - first_name: Francesco full_name: Salusti, Francesco id: '94793' last_name: Salusti - first_name: Nicolas full_name: Claro-Rodriguez, Nicolas last_name: Claro-Rodriguez - first_name: Giorgio full_name: De Pascalis, Giorgio last_name: De Pascalis - first_name: Alessia full_name: Suprano, Alessia last_name: Suprano - first_name: Leone full_name: Chiaudano, Leone last_name: Chiaudano - first_name: Eva full_name: Schöll, Eva last_name: Schöll - first_name: Lukas full_name: Hanschke, Lukas last_name: Hanschke - first_name: Tobias M. full_name: Krieger, Tobias M. last_name: Krieger - first_name: Quirin full_name: Buchinger, Quirin last_name: Buchinger - first_name: Saimon F. full_name: Covre da Silva, Saimon F. last_name: Covre da Silva - first_name: Julia full_name: Neuwirth, Julia last_name: Neuwirth - first_name: Sandra full_name: Stroj, Sandra last_name: Stroj - first_name: Sven full_name: Höfling, Sven last_name: Höfling - first_name: Tobias full_name: Huber-Loyola, Tobias last_name: Huber-Loyola - first_name: Mario A. full_name: Usuga Castaneda, Mario A. last_name: Usuga Castaneda - first_name: Gonzalo full_name: Carvacho, Gonzalo last_name: Carvacho - first_name: Nicolò full_name: Spagnolo, Nicolò last_name: Spagnolo - first_name: Michele B. full_name: Rota, Michele B. last_name: Rota - first_name: Francesco full_name: Basso Basset, Francesco last_name: Basso Basset - first_name: Armando full_name: Rastelli, Armando last_name: Rastelli - first_name: Fabio full_name: Sciarrino, Fabio last_name: Sciarrino - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Rinaldo full_name: Trotta, Rinaldo last_name: Trotta citation: 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 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 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} }' 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. 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.' 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. 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). date_created: 2025-12-04T12:20:57Z date_updated: 2025-12-17T11:36:14Z department: - _id: '623' - _id: '15' - _id: '429' - _id: '642' doi: 10.1038/s41467-025-65911-9 intvolume: ' 16' issue: '1' language: - iso: eng publication: Nature Communications publication_identifier: issn: - 2041-1723 publication_status: published publisher: Springer Science and Business Media LLC status: public title: Quantum teleportation with dissimilar quantum dots over a hybrid quantum network type: journal_article user_id: '48188' volume: 16 year: '2025' ... --- _id: '62849' abstract: - lang: eng 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. article_number: '62' author: - first_name: Matteo full_name: Pennacchietti, Matteo last_name: Pennacchietti - first_name: Brady full_name: Cunard, Brady last_name: Cunard - first_name: Shlok full_name: Nahar, Shlok last_name: Nahar - first_name: Mohd full_name: Zeeshan, Mohd last_name: Zeeshan - first_name: Sayan full_name: Gangopadhyay, Sayan last_name: Gangopadhyay - first_name: Philip J. full_name: Poole, Philip J. last_name: Poole - first_name: Dan full_name: Dalacu, Dan last_name: Dalacu - first_name: Andreas full_name: Fognini, Andreas last_name: Fognini - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Val full_name: Zwiller, Val last_name: Zwiller - first_name: Thomas full_name: Jennewein, Thomas last_name: Jennewein - first_name: Norbert full_name: Lütkenhaus, Norbert last_name: Lütkenhaus - first_name: Michael E. full_name: Reimer, Michael E. last_name: Reimer citation: 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 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 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} }' 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. 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.' 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. 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). date_created: 2025-12-04T12:03:50Z date_updated: 2025-12-04T12:23:54Z department: - _id: '623' doi: 10.1038/s42005-024-01547-3 intvolume: ' 7' issue: '1' language: - iso: eng publication: Communications Physics publication_identifier: issn: - 2399-3650 publication_status: published publisher: Springer Science and Business Media LLC status: public title: Oscillating photonic Bell state from a semiconductor quantum dot for quantum key distribution type: journal_article user_id: '48188' volume: 7 year: '2024' ... --- _id: '62852' author: - first_name: Samuel full_name: Gyger, Samuel last_name: Gyger - first_name: Max full_name: Tao, Max last_name: Tao - first_name: Marco full_name: Colangelo, Marco last_name: Colangelo - first_name: Ian full_name: Christen, Ian last_name: Christen - first_name: Hugo full_name: Larocque, Hugo last_name: Larocque - first_name: Julian full_name: Zichi, Julian last_name: Zichi - first_name: Lucas full_name: Schweickert, Lucas last_name: Schweickert - first_name: Ali full_name: Elshaari, Ali last_name: Elshaari - 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 full_name: Rastelli, Armando last_name: Rastelli - first_name: Hamed full_name: Sattari, Hamed last_name: Sattari - first_name: Gregory full_name: Chong, Gregory last_name: Chong - first_name: Yves full_name: Pétremand, Yves last_name: Pétremand - first_name: Ivan full_name: Prieto, Ivan last_name: Prieto - first_name: Yang full_name: Yu, Yang last_name: Yu - first_name: Amir full_name: Ghadimi, Amir last_name: Ghadimi - first_name: Dirk full_name: Englund, Dirk last_name: Englund - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Val full_name: Zwiller, Val last_name: Zwiller - first_name: Carlos full_name: Errando Herranz, Carlos last_name: Errando Herranz citation: 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 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} }' 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.' 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. 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.' date_created: 2025-12-04T12:07:37Z date_updated: 2025-12-04T12:24:04Z department: - _id: '623' doi: 10.1117/12.3009736 editor: - first_name: Philip R. full_name: Hemmer, Philip R. last_name: Hemmer - first_name: Alan L. full_name: Migdall, Alan L. last_name: Migdall language: - iso: eng publication: Quantum Computing, Communication, and Simulation IV publication_status: published publisher: SPIE status: public title: Integrating superconducting single-photon detectors into active photonic circuits type: conference user_id: '48188' year: '2024' ... --- _id: '62850' author: - first_name: Telsche full_name: Mikitta, Telsche last_name: Mikitta - first_name: Ana full_name: Cutuk, Ana last_name: Cutuk - first_name: Michael full_name: Jetter, Michael last_name: Jetter - first_name: Peter full_name: Michler, Peter last_name: Michler - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Hermann full_name: Kahle, Hermann last_name: Kahle citation: 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' 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} }' 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.' 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.' date_created: 2025-12-04T12:06:23Z date_updated: 2025-12-04T12:24:00Z department: - _id: '623' doi: 10.1117/12.3002481 editor: - first_name: Ursula full_name: Keller, Ursula last_name: Keller language: - iso: eng publication: Vertical External Cavity Surface Emitting Lasers (VECSELs) XIII publication_status: published publisher: SPIE status: public title: 'Membrane external-cavity surface-emitting lasers (MECSELs) optimized for double-side-pumping: a first fundamental single-side pumping characterization' type: conference user_id: '48188' year: '2024' ... --- _id: '54868' abstract: - lang: eng 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. article_type: original author: - first_name: Maja full_name: Groll, Maja last_name: Groll - first_name: Julius full_name: Bürger, Julius id: '46952' last_name: Bürger - first_name: Ioannis full_name: Caltzidis, Ioannis id: '87911' last_name: Caltzidis - first_name: Klaus D. full_name: Jöns, Klaus D. id: '85353' last_name: Jöns - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 - first_name: Uwe full_name: Gerstmann, Uwe id: '171' last_name: Gerstmann orcid: 0000-0002-4476-223X - first_name: Jörg K. N. full_name: Lindner, Jörg K. N. id: '20797' last_name: Lindner citation: 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 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} }' 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.' 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). date_created: 2024-06-24T09:46:25Z date_updated: 2025-12-05T13:39:01Z department: - _id: '15' - _id: '170' - _id: '295' - _id: '790' - _id: '642' - _id: '286' - _id: '429' - _id: '230' - _id: '27' - _id: '35' - _id: '169' doi: 10.1002/smll.202311635 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' - _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' publication: Small publication_identifier: issn: - 1613-6810 - 1613-6829 publication_status: published publisher: Wiley status: public title: DFT‐Assisted Investigation of the Electric Field and Charge Density Distribution of Pristine and Defective 2D WSe2 by Differential Phase Contrast Imaging type: journal_article user_id: '16199' year: '2024' ... --- _id: '62853' 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." article_number: '2300359' author: - first_name: Katarina full_name: Boos, Katarina last_name: Boos - first_name: Friedrich full_name: Sbresny, Friedrich last_name: Sbresny - first_name: Sang Kyu full_name: Kim, Sang Kyu last_name: Kim - first_name: Malte full_name: Kremser, Malte last_name: Kremser - first_name: Hubert full_name: Riedl, Hubert last_name: Riedl - first_name: Frederik W. full_name: Bopp, Frederik W. last_name: Bopp - first_name: William full_name: Rauhaus, William last_name: Rauhaus - first_name: Bianca full_name: Scaparra, Bianca last_name: Scaparra - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Jonathan J. full_name: Finley, Jonathan J. last_name: Finley - first_name: Kai full_name: Müller, Kai last_name: Müller - first_name: Lukas full_name: Hanschke, Lukas last_name: Hanschke 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 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} }' 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.' 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). date_created: 2025-12-04T12:08:46Z date_updated: 2025-12-11T13:00:06Z department: - _id: '623' - _id: '15' - _id: '429' - _id: '642' doi: 10.1002/qute.202300359 intvolume: ' 7' issue: '4' language: - iso: eng publication: Advanced Quantum Technologies publication_identifier: issn: - 2511-9044 - 2511-9044 publication_status: published publisher: Wiley status: public title: Coherent Swing‐Up Excitation for Semiconductor Quantum Dots type: journal_article user_id: '48188' volume: 7 year: '2024' ... --- _id: '62858' 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. author: - first_name: L. full_name: Hanschke, L. last_name: Hanschke - first_name: T. K. full_name: Bracht, T. K. last_name: Bracht - first_name: E. full_name: Schöll, E. last_name: Schöll - first_name: David full_name: Bauch, David id: '44172' last_name: Bauch - first_name: Eva full_name: Berger, Eva last_name: Berger - first_name: Patricia full_name: Kallert, Patricia last_name: Kallert - first_name: M. full_name: Peter, M. last_name: Peter - first_name: A. J. full_name: Garcia, A. J. last_name: Garcia - first_name: S. F. Covre da full_name: Silva, S. F. Covre da last_name: Silva - first_name: S. full_name: Manna, S. last_name: Manna - first_name: A. full_name: Rastelli, A. last_name: Rastelli - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 - first_name: D. E. full_name: Reiter, D. E. last_name: Reiter - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns citation: 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. 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} }' 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. 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). date_created: 2025-12-04T12:16:58Z date_updated: 2025-12-11T12:54:41Z department: - _id: '623' - _id: '15' - _id: '429' - _id: '642' external_id: arxiv: - '2409.19167' language: - iso: eng publication: arXiv:2409.19167 status: public title: Experimental measurement of the reappearance of Rabi rotations in semiconductor quantum dots type: preprint user_id: '48188' year: '2024' ... --- _id: '62856' 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. author: - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns citation: 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. 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} }' 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. mla: Jöns, Klaus. Purcell-Enhanced Single-Photon Emission from InAs/GaAs Quantum Dots Coupled to Broadband Cylindrical Nanocavities. 2024. short: K. Jöns, (2024). date_created: 2025-12-04T12:13:39Z date_updated: 2025-12-11T12:58:57Z department: - _id: '623' - _id: '15' - _id: '429' - _id: '642' language: - iso: eng status: public title: Purcell-enhanced single-photon emission from InAs/GaAs quantum dots coupled to broadband cylindrical nanocavities type: preprint user_id: '48188' year: '2024' ... --- _id: '48599' 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. author: - first_name: David full_name: Bauch, David last_name: Bauch - first_name: Dustin full_name: Siebert, Dustin last_name: Siebert - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 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 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 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} }' 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.' 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). date_created: 2023-11-03T10:07:38Z date_updated: 2023-12-21T10:41:17Z department: - _id: '61' - _id: '230' - _id: '429' - _id: '623' doi: 10.1002/qute.202300142 keyword: - tet_topic_qd language: - iso: eng main_file_link: - open_access: '1' url: https://onlinelibrary.wiley.com/doi/10.1002/qute.202300142 oa: '1' project: - _id: '173' grant_number: '231447078' name: 'TRR 142 - C09: TRR 142 - Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen (C09*)' - _id: '167' grant_number: '231447078' name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)' - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Advanced Quantum Technologies publication_identifier: issn: - 2511-9044 - 2511-9044 publication_status: published publisher: Wiley related_material: record: - id: '43246' relation: earlier_version status: public status: public title: On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs type: journal_article user_id: '158' year: '2023' ... --- _id: '43246' 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 $1550\,\mathrm{nm}$. author: - first_name: David full_name: Bauch, David last_name: Bauch - first_name: Dustin full_name: Siebert, Dustin last_name: Siebert - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 citation: 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. 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} }' 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. mla: Bauch, David, et al. On-Demand Indistinguishable and Entangled Photons at Telecom Frequencies Using Tailored Cavity Designs. 2023. short: D. Bauch, D. Siebert, K. Jöns, J. Förstner, S. Schumacher, (2023). date_created: 2023-03-31T13:22:05Z date_updated: 2023-12-21T10:41:17Z department: - _id: '61' - _id: '230' - _id: '429' - _id: '623' - _id: '15' - _id: '35' - _id: '170' - _id: '297' keyword: - tet_topic_phc - tet_topic_qd language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/pdf/2303.13871.pdf oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '173' grant_number: '231447078' name: 'TRR 142 - C09: TRR 142 - Subproject C09' - _id: '167' grant_number: '231447078' name: 'TRR 142 - B06: TRR 142 - Subproject B06' - _id: '53' grant_number: '231447078' name: 'TRR 142: TRR 142' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '56' name: 'TRR 142 - C: TRR 142 - Project Area C' related_material: record: - id: '48599' relation: later_version status: public status: public title: On-demand indistinguishable and entangled photons at telecom frequencies using tailored cavity designs type: preprint user_id: '16199' year: '2023' ... --- _id: '42049' 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." author: - first_name: Guo-Dong full_name: Cui, Guo-Dong last_name: Cui - first_name: Lucas full_name: Schweickert, Lucas last_name: Schweickert - 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 full_name: Lettner, Thomas last_name: Lettner - first_name: Katharina D. full_name: Zeuner, Katharina D. last_name: Zeuner - first_name: Lara Scavuzzo full_name: Montaña, Lara Scavuzzo last_name: Montaña - first_name: Saimon Filipe Covre da full_name: Silva, Saimon Filipe Covre da last_name: Silva - first_name: Marcus full_name: Reindl, Marcus last_name: Reindl - first_name: Huiying full_name: Huang, Huiying last_name: Huang - first_name: Rinaldo full_name: Trotta, Rinaldo last_name: Trotta - first_name: Armando full_name: Rastelli, Armando last_name: Rastelli - first_name: Val full_name: Zwiller, Val last_name: Zwiller - first_name: Eden full_name: Figueroa, Eden last_name: Figueroa 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. 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. 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} }' 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. 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. 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. 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). date_created: 2023-02-13T11:25:45Z date_updated: 2023-02-13T11:28:56Z department: - _id: '642' external_id: arxiv: - '2301.10326' language: - iso: eng publication: arXiv:2301.10326 status: public title: Coherent Quantum Interconnection between On-Demand Quantum Dot Single Photons and a Resonant Atomic Quantum Memory type: preprint user_id: '14931' year: '2023' ... --- _id: '61252' 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. article_number: '2300142' author: - first_name: David full_name: Bauch, David last_name: Bauch - first_name: Dustin full_name: Siebert, Dustin last_name: Siebert - first_name: Klaus D. full_name: Jöns, Klaus D. id: '85353' last_name: Jöns - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 citation: ama: Bauch D, Siebert D, Jöns KD, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. Advanced Quantum Technologies. 2023;7(1). doi:10.1002/qute.202300142 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} }' 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.' 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. short: D. Bauch, D. Siebert, K.D. Jöns, J. Förstner, S. Schumacher, Advanced Quantum Technologies 7 (2023). date_created: 2025-09-12T11:11:56Z date_updated: 2025-09-12T11:16:12Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '642' - _id: '61' - _id: '230' - _id: '35' - _id: '34' - _id: '429' - _id: '27' - _id: '623' doi: 10.1002/qute.202300142 intvolume: ' 7' issue: '1' language: - iso: eng project: - _id: '52' name: Computing Resources Provided by the Paderborn Center for Parallel Computing - _id: '53' name: 'TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '55' name: TRR 142 - Project Area B - _id: '56' name: TRR 142 - Project Area C - _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' - _id: '266' name: 'PhoQC: Photonisches Quantencomputing' publication: Advanced Quantum Technologies publication_identifier: issn: - 2511-9044 - 2511-9044 publication_status: published publisher: Wiley status: public title: On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs type: journal_article user_id: '16199' volume: 7 year: '2023' ... --- _id: '36471' abstract: - lang: eng 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. article_number: '610' author: - first_name: Thomas full_name: Hummel, Thomas id: '83846' last_name: Hummel orcid: 0000-0001-8627-2119 - first_name: Alex full_name: Widhalm, Alex last_name: Widhalm - first_name: Jan Philipp full_name: Höpker, Jan Philipp id: '33913' last_name: Höpker - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Jin full_name: Chang, Jin last_name: Chang - first_name: Andreas full_name: Fognini, Andreas last_name: Fognini - first_name: Stephan full_name: Steinhauer, Stephan last_name: Steinhauer - first_name: Val full_name: Zwiller, Val last_name: Zwiller - first_name: Artur full_name: Zrenner, Artur id: '606' last_name: Zrenner orcid: 0000-0002-5190-0944 - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley citation: 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} }' 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. 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.' 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. 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). date_created: 2023-01-12T14:46:40Z date_updated: 2025-12-11T13:05:14Z department: - _id: '15' - _id: '623' - _id: '230' - _id: '429' - _id: '642' doi: 10.1364/oe.472058 intvolume: ' 31' issue: '1' keyword: - Atomic and Molecular Physics - and Optics language: - iso: eng publication: Optics Express publication_identifier: issn: - 1094-4087 publication_status: published publisher: Optica Publishing Group status: public title: Nanosecond gating of superconducting nanowire single-photon detectors using cryogenic bias circuitry type: journal_article user_id: '48188' volume: 31 year: '2023' ... --- _id: '41879' article_number: '093603' author: - first_name: F full_name: Sbresny, F last_name: Sbresny - first_name: L full_name: ' Hanschke, L' last_name: ' Hanschke' - first_name: E full_name: Schöll, E last_name: Schöll - first_name: W full_name: Rauhaus, W last_name: Rauhaus - first_name: B full_name: Scaparra, B last_name: Scaparra - first_name: K full_name: Boos, K last_name: Boos - first_name: E.Zubizarreta full_name: Casalengua, E.Zubizarreta last_name: Casalengua - first_name: H full_name: H. Riedl, H last_name: H. Riedl - first_name: E Del full_name: Valle, E Del last_name: Valle - first_name: J.J full_name: Finley, J.J last_name: Finley - first_name: Klaus D. full_name: Jöns, Klaus D. id: '85353' last_name: Jöns - first_name: K full_name: Müller, K last_name: Müller citation: ama: Sbresny F, Hanschke L, Schöll E, et al. Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System. 2022;128. 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). 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} }' 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. ieee: F. Sbresny et al., “Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System,” vol. 128. 2022. mla: Sbresny, F., et al. Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System. 093603, 2022. 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). date_created: 2023-02-07T19:30:06Z date_updated: 2023-02-13T08:47:39Z department: - _id: '623' intvolume: ' 128' language: - iso: ger publication_status: published series_title: Phys. Rev. Lett status: public title: Stimulated Generation of Indistinguishable Single Photons from a Quantum Ladder System type: conference user_id: '71124' volume: 128 year: '2022' ... --- _id: '41880' author: - first_name: M full_name: Turunen, M last_name: Turunen - first_name: M full_name: Brotons-Gisbert, M last_name: Brotons-Gisbert - first_name: Y full_name: ' Dai, Y' last_name: ' Dai' - first_name: Y full_name: Wang, Y last_name: Wang - first_name: E full_name: Scerri, E last_name: Scerri - first_name: C full_name: Bonato, C last_name: Bonato - first_name: Klaus D. full_name: Jöns, Klaus D. id: '85353' last_name: Jöns - first_name: Z full_name: Sun, Z last_name: Sun - first_name: B.D full_name: Gerardot, B.D last_name: Gerardot citation: ama: Turunen M, Brotons-Gisbert M, Dai Y, et al. Quantum photonics with layered 2D materials. 2022;4(4):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). 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 } }' 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. 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. date_created: 2023-02-07T19:36:21Z date_updated: 2023-02-13T08:47:40Z department: - _id: '623' intvolume: ' 4' issue: '4' language: - iso: ger page: 219-236 publication_status: published series_title: 'Nature Reviews Physics ' status: public title: Quantum photonics with layered 2D materials type: conference user_id: '71124' volume: 4 year: '2022' ... --- _id: '41881' author: - first_name: E full_name: Pelucchi, E last_name: Pelucchi - first_name: G full_name: Fagas, G last_name: Fagas - first_name: I full_name: ' Aharonovich, I' last_name: ' Aharonovich' - first_name: D full_name: Englund, D last_name: Englund - first_name: E full_name: Figueroa, E last_name: Figueroa - first_name: Q full_name: Gong, Q last_name: Gong - first_name: H full_name: Hannes, H last_name: Hannes - first_name: J full_name: Liu, J last_name: Liu - first_name: C-Y full_name: Lu, C-Y last_name: Lu - first_name: N full_name: Matsuda, N last_name: Matsuda - first_name: J.W full_name: Pan, J.W last_name: Pan - first_name: F full_name: Schreck, F last_name: Schreck - first_name: F full_name: Sciarrino, F last_name: Sciarrino - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: J full_name: Wang, J last_name: Wang - first_name: Klaus D. full_name: Jöns, Klaus D. id: '85353' last_name: Jöns citation: 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. 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). 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 } }' 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. mla: Pelucchi, E., et al. The potential and global outlook of integrated photonics for quantum technologi. no. 3, 2022, pp. 194–208. 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. date_created: 2023-02-07T19:45:56Z date_updated: 2023-02-13T08:48:29Z department: - _id: '623' intvolume: ' 4' issue: '3' language: - iso: ger page: 194-208 publication_status: published series_title: 'Nature Reviews Physics ' status: public title: The potential and global outlook of integrated photonics for quantum technologi type: conference user_id: '71124' volume: 4 year: '2022' ... --- _id: '40523' abstract: - lang: eng 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. article_number: '1387' author: - first_name: B. full_name: Jonas, B. last_name: Jonas - first_name: Dirk Florian full_name: Heinze, Dirk Florian id: '10904' last_name: Heinze - first_name: E. full_name: Schöll, E. last_name: Schöll - first_name: P. full_name: Kallert, P. last_name: Kallert - first_name: T. full_name: Langer, T. last_name: Langer - first_name: S. full_name: Krehs, S. last_name: Krehs - first_name: A. full_name: Widhalm, A. last_name: Widhalm - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Dirk full_name: Reuter, Dirk id: '37763' last_name: Reuter - first_name: Stefan full_name: Schumacher, Stefan id: '27271' last_name: Schumacher orcid: 0000-0003-4042-4951 - first_name: Artur full_name: Zrenner, Artur id: '606' last_name: Zrenner orcid: 0000-0002-5190-0944 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 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 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} }' 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.' mla: Jonas, B., et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” Nature Communications, vol. 13, no. 1, 1387, Springer Science and Business Media LLC, 2022, doi:10.1038/s41467-022-28993-3. short: B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, S. Schumacher, A. Zrenner, Nature Communications 13 (2022). date_created: 2023-01-27T13:41:42Z date_updated: 2023-04-20T15:18:31Z department: - _id: '15' - _id: '297' - _id: '230' - _id: '429' - _id: '27' - _id: '623' - _id: '170' - _id: '35' doi: 10.1038/s41467-022-28993-3 intvolume: ' 13' issue: '1' keyword: - General Physics and Astronomy - General Biochemistry - Genetics and Molecular Biology - General Chemistry - Multidisciplinary language: - iso: eng project: - _id: '53' name: 'TRR 142: TRR 142' - _id: '54' name: 'TRR 142 - A: TRR 142 - Project Area A' - _id: '60' name: 'TRR 142 - A03: TRR 142 - Subproject A03' - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publication: Nature Communications publication_identifier: issn: - 2041-1723 publication_status: published publisher: Springer Science and Business Media LLC status: public title: Nonlinear down-conversion in a single quantum dot type: journal_article user_id: '16199' volume: 13 year: '2022' ... --- _id: '40428' author: - first_name: Björn full_name: Jonas, Björn last_name: Jonas - first_name: Dirk Florian full_name: Heinze, Dirk Florian id: '10904' last_name: Heinze - first_name: Eva full_name: Schöll, Eva last_name: Schöll - first_name: Patricia full_name: Kallert, Patricia last_name: Kallert - first_name: Timo full_name: Langer, Timo last_name: Langer - first_name: Sebastian full_name: Krehs, Sebastian last_name: Krehs - first_name: Alex full_name: Widhalm, Alex last_name: Widhalm - first_name: Klaus full_name: Jöns, Klaus id: '85353' last_name: Jöns - first_name: Dirk full_name: Reuter, Dirk id: '37763' last_name: Reuter - first_name: Artur full_name: Zrenner, Artur id: '606' last_name: Zrenner orcid: 0000-0002-5190-0944 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 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} }' 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. mla: Jonas, Björn, et al. Nonlinear Down-Conversion in a Single Quantum Dot. LibreCat University, 2022, doi:10.5281/ZENODO.6024228. short: B. Jonas, D.F. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm, K. Jöns, D. Reuter, A. Zrenner, Nonlinear Down-Conversion in a Single Quantum Dot, LibreCat University, 2022. date_created: 2023-01-26T15:38:28Z date_updated: 2023-04-20T15:18:48Z department: - _id: '15' - _id: '170' - _id: '297' - _id: '290' - _id: '292' - _id: '642' - _id: '230' - _id: '429' - _id: '35' doi: 10.5281/ZENODO.6024228 project: - _id: '53' name: 'TRR 142: TRR 142' - _id: '54' name: 'TRR 142 - A: TRR 142 - Project Area A' - _id: '60' name: 'TRR 142 - A3: TRR 142 - Subproject A3' - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' publisher: LibreCat University status: public title: Nonlinear down-conversion in a single quantum dot type: research_data user_id: '16199' year: '2022' ...