[{"publisher":"IOP Publishing","date_created":"2024-09-02T12:08:18Z","title":"An efficient compact blazed grating antenna for optical phased arrays","year":"2024","keyword":["tet_topic_opticalantenna"],"ddc":["530"],"language":[{"iso":"eng"}],"publication":"Journal of Physics: Photonics","abstract":[{"lang":"eng","text":"Phased arrays are vital in communication systems and have received significant interest in the field of optoelectronics and photonics, enabling a wide range of applications such as LiDAR, holography, wireless communication, etc. In this work, we present a blazed grating antenna that is optimized to have upward radiation efficiency as high as 80% with a compact footprint of 3.5 μm × 2 μm at an operational wavelength of 1.55 μm. Our numerical investigations demonstrate that this antenna in a 64 × 64 phased array configuration is capable of producing desired far-field radiation patterns. Additionally, our antenna possesses a low side lobe level of -9.7 dB and a negligible reflection efficiency of under 1%, making it an attractive candidate for integrated optical phased arrays."}],"file":[{"content_type":"application/pdf","relation":"main_file","date_created":"2024-09-02T12:13:55Z","creator":"fossie","date_updated":"2024-09-02T12:13:55Z","file_name":"2024-08 Farheen - JPhys Photonics - An efficient compact blazed grating antenna for optical phased arrays (official version).pdf","file_id":"55990","access_level":"open_access","file_size":1492402}],"oa":"1","date_updated":"2024-09-02T12:23:55Z","volume":6,"author":[{"first_name":"Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489","full_name":"Farheen, Henna","id":"53444"},{"full_name":"Joshi, Suraj","last_name":"Joshi","first_name":"Suraj"},{"first_name":"J. Christoph","last_name":"Scheytt","orcid":"0000-0002-5950-6618 ","full_name":"Scheytt, J. Christoph","id":"37144"},{"first_name":"Viktor","last_name":"Myroshnychenko","id":"46371","full_name":"Myroshnychenko, Viktor"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens","first_name":"Jens"}],"doi":"10.1088/2515-7647/ad6ed4","has_accepted_license":"1","publication_identifier":{"issn":["2515-7647"]},"publication_status":"published","page":"045010","intvolume":"         6","citation":{"apa":"Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner, J. (2024). An efficient compact blazed grating antenna for optical phased arrays. <i>Journal of Physics: Photonics</i>, <i>6</i>, 045010. <a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">https://doi.org/10.1088/2515-7647/ad6ed4</a>","bibtex":"@article{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2024, title={An efficient compact blazed grating antenna for optical phased arrays}, volume={6}, DOI={<a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>}, journal={Journal of Physics: Photonics}, publisher={IOP Publishing}, author={Farheen, Henna and Joshi, Suraj and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, year={2024}, pages={045010} }","short":"H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Journal of Physics: Photonics 6 (2024) 045010.","mla":"Farheen, Henna, et al. “An Efficient Compact Blazed Grating Antenna for Optical Phased Arrays.” <i>Journal of Physics: Photonics</i>, vol. 6, IOP Publishing, 2024, p. 045010, doi:<a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>.","ama":"Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. An efficient compact blazed grating antenna for optical phased arrays. <i>Journal of Physics: Photonics</i>. 2024;6:045010. doi:<a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>","chicago":"Farheen, Henna, Suraj Joshi, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “An Efficient Compact Blazed Grating Antenna for Optical Phased Arrays.” <i>Journal of Physics: Photonics</i> 6 (2024): 045010. <a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">https://doi.org/10.1088/2515-7647/ad6ed4</a>.","ieee":"H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “An efficient compact blazed grating antenna for optical phased arrays,” <i>Journal of Physics: Photonics</i>, vol. 6, p. 045010, 2024, doi: <a href=\"https://doi.org/10.1088/2515-7647/ad6ed4\">10.1088/2515-7647/ad6ed4</a>."},"_id":"55989","project":[{"grant_number":"PROFILNRW-2020-067","name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266"},{"_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","grant_number":"231447078"},{"grant_number":"231447078","_id":"167","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"}],"department":[{"_id":"61"},{"_id":"429"},{"_id":"58"}],"user_id":"158","article_type":"original","file_date_updated":"2024-09-02T12:13:55Z","type":"journal_article","status":"public"},{"title":"Guided modes of thin-film lithium niobate slabs","publisher":"Optica Publishing Group","date_created":"2024-09-21T09:17:16Z","year":"2024","ddc":["530"],"keyword":["tet_topic_waveguide"],"language":[{"iso":"eng"}],"abstract":[{"text":"Dielectric slab waveguides made of thin-film-lithium-niobate (TFLN) media are consid-ered, for operation in the linear regime. We outline and implement a largely analytic procedure forrigorous modal analysis of three-layer slabs with birefringent, anisotropic core. For Z-cut wave-guides, the slab eigenmode problem separates into uncoupled sets of scalar equations for TE andTM modes. Slabs in X-cut configuration support mostly mildly hybrid eigenmodes, with clear pre-dominant TE or TM polarization, and with effective indices that depend on the propagation directionof the modes, relative to the crystal axes. Strong hybridization can be observed for near degeneratemodes in singular configurations without vertical symmetry, or in symmetric slabs where two nearlydegenerate modes are of the same symmetry class. Dispersion curves for slab thickness and propa-gation angle are discussed, for slabs with oxide and air cover. ","lang":"eng"}],"file":[{"date_updated":"2024-11-04T17:05:30Z","creator":"fossie","date_created":"2024-11-04T17:05:30Z","file_size":4399685,"file_id":"56864","file_name":"2024-11 Hammer - Optics Continuum - Guided modes of thin-film lithium niobate slabs.pdf","access_level":"closed","content_type":"application/pdf","success":1,"relation":"main_file"}],"publication":"Optics Continuum","doi":"10.1364/optcon.532822","date_updated":"2024-11-04T17:07:27Z","author":[{"id":"48077","full_name":"Hammer, Manfred","orcid":"0000-0002-6331-9348","last_name":"Hammer","first_name":"Manfred"},{"last_name":"Farheen","orcid":"0000-0001-7730-3489","id":"53444","full_name":"Farheen, Henna","first_name":"Henna"},{"first_name":"Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","id":"158","full_name":"Förstner, Jens"}],"citation":{"apa":"Hammer, M., Farheen, H., &#38; Förstner, J. (2024). Guided modes of thin-film lithium niobate slabs. <i>Optics Continuum</i>, 532822. <a href=\"https://doi.org/10.1364/optcon.532822\">https://doi.org/10.1364/optcon.532822</a>","mla":"Hammer, Manfred, et al. “Guided Modes of Thin-Film Lithium Niobate Slabs.” <i>Optics Continuum</i>, Optica Publishing Group, 2024, p. 532822, doi:<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>.","short":"M. Hammer, H. Farheen, J. Förstner, Optics Continuum (2024) 532822.","bibtex":"@article{Hammer_Farheen_Förstner_2024, title={Guided modes of thin-film lithium niobate slabs}, DOI={<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>}, journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Farheen, Henna and Förstner, Jens}, year={2024}, pages={532822} }","ama":"Hammer M, Farheen H, Förstner J. Guided modes of thin-film lithium niobate slabs. <i>Optics Continuum</i>. Published online 2024:532822. doi:<a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>","chicago":"Hammer, Manfred, Henna Farheen, and Jens Förstner. “Guided Modes of Thin-Film Lithium Niobate Slabs.” <i>Optics Continuum</i>, 2024, 532822. <a href=\"https://doi.org/10.1364/optcon.532822\">https://doi.org/10.1364/optcon.532822</a>.","ieee":"M. Hammer, H. Farheen, and J. Förstner, “Guided modes of thin-film lithium niobate slabs,” <i>Optics Continuum</i>, p. 532822, 2024, doi: <a href=\"https://doi.org/10.1364/optcon.532822\">10.1364/optcon.532822</a>."},"page":"532822","publication_status":"published","publication_identifier":{"issn":["2770-0208"]},"has_accepted_license":"1","file_date_updated":"2024-11-04T17:05:30Z","project":[{"grant_number":"PROFILNRW-2020-067","name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266"},{"grant_number":"231447078","_id":"167","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)"},{"name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53","grant_number":"231447078"}],"_id":"56193","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"status":"public","type":"journal_article"},{"article_type":"original","user_id":"99427","department":[{"_id":"799"}],"project":[{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"_id":"63636","status":"public","type":"journal_article","main_file_link":[{"open_access":"1"}],"doi":"10.5802/crmath.652","author":[{"first_name":"Benjamin","full_name":"Hinrichs, Benjamin","id":"99427","last_name":"Hinrichs","orcid":"0000-0001-9074-1205"},{"full_name":"Lampart, Jonas","last_name":"Lampart","first_name":"Jonas"}],"volume":362,"oa":"1","date_updated":"2026-01-16T08:45:25Z","citation":{"chicago":"Hinrichs, Benjamin, and Jonas Lampart. “A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate.” <i>Comptes Rendus. Mathématique</i> 362, no. G11 (2024): 1399–1411. <a href=\"https://doi.org/10.5802/crmath.652\">https://doi.org/10.5802/crmath.652</a>.","ieee":"B. Hinrichs and J. Lampart, “A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate,” <i>Comptes Rendus. Mathématique</i>, vol. 362, no. G11, pp. 1399–1411, 2024, doi: <a href=\"https://doi.org/10.5802/crmath.652\">10.5802/crmath.652</a>.","ama":"Hinrichs B, Lampart J. A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate. <i>Comptes Rendus Mathématique</i>. 2024;362(G11):1399-1411. doi:<a href=\"https://doi.org/10.5802/crmath.652\">10.5802/crmath.652</a>","apa":"Hinrichs, B., &#38; Lampart, J. (2024). A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate. <i>Comptes Rendus. Mathématique</i>, <i>362</i>(G11), 1399–1411. <a href=\"https://doi.org/10.5802/crmath.652\">https://doi.org/10.5802/crmath.652</a>","short":"B. Hinrichs, J. Lampart, Comptes Rendus. Mathématique 362 (2024) 1399–1411.","mla":"Hinrichs, Benjamin, and Jonas Lampart. “A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate.” <i>Comptes Rendus. Mathématique</i>, vol. 362, no. G11, MathDoc/Centre Mersenne, 2024, pp. 1399–411, doi:<a href=\"https://doi.org/10.5802/crmath.652\">10.5802/crmath.652</a>.","bibtex":"@article{Hinrichs_Lampart_2024, title={A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate}, volume={362}, DOI={<a href=\"https://doi.org/10.5802/crmath.652\">10.5802/crmath.652</a>}, number={G11}, journal={Comptes Rendus. Mathématique}, publisher={MathDoc/Centre Mersenne}, author={Hinrichs, Benjamin and Lampart, Jonas}, year={2024}, pages={1399–1411} }"},"page":"1399-1411","intvolume":"       362","publication_status":"published","publication_identifier":{"issn":["1631-073X","1778-3569"]},"language":[{"iso":"eng"}],"external_id":{"arxiv":["2311.05361"]},"publication":"Comptes Rendus. Mathématique","title":"A Lower Bound on the Critical Momentum of an Impurity in a Bose–Einstein Condensate","date_created":"2026-01-16T08:43:59Z","publisher":"MathDoc/Centre Mersenne","year":"2024","issue":"G11"},{"date_updated":"2026-01-16T08:56:37Z","date_created":"2026-01-16T08:56:18Z","author":[{"first_name":"Benjamin","orcid":"0000-0001-9074-1205","last_name":"Hinrichs","id":"99427","full_name":"Hinrichs, Benjamin"},{"first_name":"Fumio","last_name":"Hiroshima","full_name":"Hiroshima, Fumio"}],"title":"On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups","year":"2024","citation":{"bibtex":"@article{Hinrichs_Hiroshima_2024, title={On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups}, journal={arXiv:2412.09708}, author={Hinrichs, Benjamin and Hiroshima, Fumio}, year={2024} }","mla":"Hinrichs, Benjamin, and Fumio Hiroshima. “On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups.” <i>ArXiv:2412.09708</i>, 2024.","short":"B. Hinrichs, F. Hiroshima, ArXiv:2412.09708 (2024).","apa":"Hinrichs, B., &#38; Hiroshima, F. (2024). On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups. In <i>arXiv:2412.09708</i>.","chicago":"Hinrichs, Benjamin, and Fumio Hiroshima. “On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups.” <i>ArXiv:2412.09708</i>, 2024.","ieee":"B. Hinrichs and F. Hiroshima, “On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups,” <i>arXiv:2412.09708</i>. 2024.","ama":"Hinrichs B, Hiroshima F. On the Ergodicity of Renormalized Translation-Invariant Nelson-Type Semigroups. <i>arXiv:241209708</i>. Published online 2024."},"project":[{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"_id":"63641","external_id":{"arxiv":["2412.09708"]},"user_id":"99427","department":[{"_id":"799"}],"language":[{"iso":"eng"}],"type":"preprint","publication":"arXiv:2412.09708","abstract":[{"text":"We present a simple functional integration based proof that the semigroups generated by the ultraviolet-renormalized translation-invariant non- and semi-relativistic Nelson Hamiltonians are positivity improving (and hence ergodic) with respect to the Fröhlich cone for arbitrary values of the total momentum. Our argument simplifies known proofs for ergodicity and the result is new in the semi-relativistic case.","lang":"eng"}],"status":"public"},{"issue":"1","year":"2024","publisher":"Springer Science and Business Media LLC","date_created":"2026-01-16T08:46:12Z","title":"On Lieb–Robinson Bounds for a Class of Continuum Fermions","publication":"Annales Henri Poincaré","external_id":{"arxiv":["2310.17736"]},"language":[{"iso":"eng"}],"publication_identifier":{"issn":["1424-0637","1424-0661"]},"publication_status":"published","page":"41-80","intvolume":"        26","citation":{"chicago":"Hinrichs, Benjamin, Marius Lemm, and Oliver Siebert. “On Lieb–Robinson Bounds for a Class of Continuum Fermions.” <i>Annales Henri Poincaré</i> 26, no. 1 (2024): 41–80. <a href=\"https://doi.org/10.1007/s00023-024-01453-y\">https://doi.org/10.1007/s00023-024-01453-y</a>.","ieee":"B. Hinrichs, M. Lemm, and O. Siebert, “On Lieb–Robinson Bounds for a Class of Continuum Fermions,” <i>Annales Henri Poincaré</i>, vol. 26, no. 1, pp. 41–80, 2024, doi: <a href=\"https://doi.org/10.1007/s00023-024-01453-y\">10.1007/s00023-024-01453-y</a>.","ama":"Hinrichs B, Lemm M, Siebert O. On Lieb–Robinson Bounds for a Class of Continuum Fermions. <i>Annales Henri Poincaré</i>. 2024;26(1):41-80. doi:<a href=\"https://doi.org/10.1007/s00023-024-01453-y\">10.1007/s00023-024-01453-y</a>","mla":"Hinrichs, Benjamin, et al. “On Lieb–Robinson Bounds for a Class of Continuum Fermions.” <i>Annales Henri Poincaré</i>, vol. 26, no. 1, Springer Science and Business Media LLC, 2024, pp. 41–80, doi:<a href=\"https://doi.org/10.1007/s00023-024-01453-y\">10.1007/s00023-024-01453-y</a>.","short":"B. Hinrichs, M. Lemm, O. Siebert, Annales Henri Poincaré 26 (2024) 41–80.","bibtex":"@article{Hinrichs_Lemm_Siebert_2024, title={On Lieb–Robinson Bounds for a Class of Continuum Fermions}, volume={26}, DOI={<a href=\"https://doi.org/10.1007/s00023-024-01453-y\">10.1007/s00023-024-01453-y</a>}, number={1}, journal={Annales Henri Poincaré}, publisher={Springer Science and Business Media LLC}, author={Hinrichs, Benjamin and Lemm, Marius and Siebert, Oliver}, year={2024}, pages={41–80} }","apa":"Hinrichs, B., Lemm, M., &#38; Siebert, O. (2024). On Lieb–Robinson Bounds for a Class of Continuum Fermions. <i>Annales Henri Poincaré</i>, <i>26</i>(1), 41–80. <a href=\"https://doi.org/10.1007/s00023-024-01453-y\">https://doi.org/10.1007/s00023-024-01453-y</a>"},"oa":"1","date_updated":"2026-01-16T09:05:58Z","volume":26,"author":[{"full_name":"Hinrichs, Benjamin","id":"99427","last_name":"Hinrichs","orcid":"0000-0001-9074-1205","first_name":"Benjamin"},{"first_name":"Marius","last_name":"Lemm","full_name":"Lemm, Marius"},{"last_name":"Siebert","full_name":"Siebert, Oliver","first_name":"Oliver"}],"doi":"10.1007/s00023-024-01453-y","main_file_link":[{"open_access":"1"}],"type":"journal_article","status":"public","_id":"63637","project":[{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"}],"department":[{"_id":"799"}],"user_id":"99427","article_type":"original"},{"citation":{"ama":"Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic generation of linear photonic cluster states. <i>APL Quantum</i>. 2024;1(3). doi:<a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>","ieee":"D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement in the deterministic generation of linear photonic cluster states,” <i>APL Quantum</i>, vol. 1, no. 3, Art. no. 036110, 2024, doi: <a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>.","chicago":"Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” <i>APL Quantum</i> 1, no. 3 (2024). <a href=\"https://doi.org/10.1063/5.0214197\">https://doi.org/10.1063/5.0214197</a>.","apa":"Bauch, D., Köcher, N., Heinisch, N., &#38; Schumacher, S. (2024). Time-bin entanglement in the deterministic generation of linear photonic cluster states. <i>APL Quantum</i>, <i>1</i>(3), Article 036110. <a href=\"https://doi.org/10.1063/5.0214197\">https://doi.org/10.1063/5.0214197</a>","mla":"Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” <i>APL Quantum</i>, vol. 1, no. 3, 036110, AIP Publishing, 2024, doi:<a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>.","bibtex":"@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement in the deterministic generation of linear photonic cluster states}, volume={1}, DOI={<a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>}, number={3036110}, journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher, Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }","short":"D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024)."},"intvolume":"         1","publication_status":"published","publication_identifier":{"issn":["2835-0103"]},"doi":"10.1063/5.0214197","author":[{"first_name":"David","last_name":"Bauch","full_name":"Bauch, David"},{"full_name":"Köcher, Nikolas","id":"79191","last_name":"Köcher","first_name":"Nikolas"},{"id":"90283","full_name":"Heinisch, Nils","last_name":"Heinisch","orcid":"0009-0006-0984-2097","first_name":"Nils"},{"full_name":"Schumacher, Stefan","id":"27271","last_name":"Schumacher","orcid":"0000-0003-4042-4951","first_name":"Stefan"}],"volume":1,"date_updated":"2025-09-12T11:11:32Z","status":"public","type":"journal_article","article_number":"036110","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"35"},{"_id":"230"},{"_id":"27"},{"_id":"429"},{"_id":"623"}],"project":[{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"_id":"56","name":"TRR 142 - Project Area C"},{"name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen","_id":"173"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"_id":"61251","year":"2024","issue":"3","title":"Time-bin entanglement in the deterministic generation of linear photonic cluster states","date_created":"2025-09-12T11:08:59Z","publisher":"AIP Publishing","abstract":[{"text":"<jats:p>We theoretically investigate strategies for the deterministic creation of trains of time-bin entangled photons using an individual quantum emitter described by a Λ-type electronic system. We explicitly demonstrate the theoretical generation of linear cluster states with substantial numbers of entangled photonic qubits in full microscopic numerical simulations. The underlying scheme is based on the manipulation of ground state coherences through precise optical driving. One important finding is that the most easily accessible quality metrics, the achievable rotation fidelities, fall short in assessing the actual quantum correlations of the emitted photons in the face of losses. To address this, we explicitly calculate stabilizer generator expectation values as a superior gauge for the quantum properties of the generated many-photon state. With widespread applicability in other emitter and excitation–emission schemes also, our work lays the conceptual foundations for an in-depth practical analysis of time-bin entanglement based on full numerical simulations with predictive capabilities for realistic systems and setups, including losses and imperfections. The specific results shown in the present work illustrate that with controlled minimization of losses and realistic system parameters for quantum-dot type systems, useful linear cluster states of significant lengths can be generated in the calculations, discussing the possibility of scalability for quantum information processing endeavors.</jats:p>","lang":"eng"}],"publication":"APL Quantum","language":[{"iso":"eng"}]},{"author":[{"first_name":"David","full_name":"Bauch, David","last_name":"Bauch"},{"first_name":"Nikolas","last_name":"Köcher","id":"79191","full_name":"Köcher, Nikolas"},{"last_name":"Heinisch","orcid":"0009-0006-0984-2097","full_name":"Heinisch, Nils","id":"90283","first_name":"Nils"},{"full_name":"Schumacher, Stefan","id":"27271","orcid":"0000-0003-4042-4951","last_name":"Schumacher","first_name":"Stefan"}],"date_created":"2025-12-04T12:35:53Z","volume":1,"date_updated":"2025-12-05T13:55:00Z","publisher":"AIP Publishing","doi":"10.1063/5.0214197","title":"Time-bin entanglement in the deterministic generation of linear photonic cluster states","issue":"3","publication_status":"published","publication_identifier":{"issn":["2835-0103"]},"citation":{"mla":"Bauch, David, et al. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” <i>APL Quantum</i>, vol. 1, no. 3, 036110, AIP Publishing, 2024, doi:<a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>.","short":"D. Bauch, N. Köcher, N. Heinisch, S. Schumacher, APL Quantum 1 (2024).","bibtex":"@article{Bauch_Köcher_Heinisch_Schumacher_2024, title={Time-bin entanglement in the deterministic generation of linear photonic cluster states}, volume={1}, DOI={<a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>}, number={3036110}, journal={APL Quantum}, publisher={AIP Publishing}, author={Bauch, David and Köcher, Nikolas and Heinisch, Nils and Schumacher, Stefan}, year={2024} }","apa":"Bauch, D., Köcher, N., Heinisch, N., &#38; Schumacher, S. (2024). Time-bin entanglement in the deterministic generation of linear photonic cluster states. <i>APL Quantum</i>, <i>1</i>(3), Article 036110. <a href=\"https://doi.org/10.1063/5.0214197\">https://doi.org/10.1063/5.0214197</a>","ama":"Bauch D, Köcher N, Heinisch N, Schumacher S. Time-bin entanglement in the deterministic generation of linear photonic cluster states. <i>APL Quantum</i>. 2024;1(3). doi:<a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>","ieee":"D. Bauch, N. Köcher, N. Heinisch, and S. Schumacher, “Time-bin entanglement in the deterministic generation of linear photonic cluster states,” <i>APL Quantum</i>, vol. 1, no. 3, Art. no. 036110, 2024, doi: <a href=\"https://doi.org/10.1063/5.0214197\">10.1063/5.0214197</a>.","chicago":"Bauch, David, Nikolas Köcher, Nils Heinisch, and Stefan Schumacher. “Time-Bin Entanglement in the Deterministic Generation of Linear Photonic Cluster States.” <i>APL Quantum</i> 1, no. 3 (2024). <a href=\"https://doi.org/10.1063/5.0214197\">https://doi.org/10.1063/5.0214197</a>."},"intvolume":"         1","year":"2024","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"705"},{"_id":"35"},{"_id":"27"},{"_id":"429"},{"_id":"230"},{"_id":"623"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"173","name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen"},{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"},{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 - Project Area C","_id":"56"}],"_id":"62868","language":[{"iso":"eng"}],"article_number":"036110","type":"journal_article","publication":"APL Quantum","status":"public","abstract":[{"text":"<jats:p>We theoretically investigate strategies for the deterministic creation of trains of time-bin entangled photons using an individual quantum emitter described by a Λ-type electronic system. We explicitly demonstrate the theoretical generation of linear cluster states with substantial numbers of entangled photonic qubits in full microscopic numerical simulations. The underlying scheme is based on the manipulation of ground state coherences through precise optical driving. One important finding is that the most easily accessible quality metrics, the achievable rotation fidelities, fall short in assessing the actual quantum correlations of the emitted photons in the face of losses. To address this, we explicitly calculate stabilizer generator expectation values as a superior gauge for the quantum properties of the generated many-photon state. With widespread applicability in other emitter and excitation–emission schemes also, our work lays the conceptual foundations for an in-depth practical analysis of time-bin entanglement based on full numerical simulations with predictive capabilities for realistic systems and setups, including losses and imperfections. The specific results shown in the present work illustrate that with controlled minimization of losses and realistic system parameters for quantum-dot type systems, useful linear cluster states of significant lengths can be generated in the calculations, discussing the possibility of scalability for quantum information processing endeavors.</jats:p>","lang":"eng"}]},{"intvolume":"        13","citation":{"mla":"Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i>, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","bibtex":"@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023, title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family}, volume={13}, DOI={<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>}, number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing, Michael}, year={2023} }","short":"S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).","apa":"Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn, C., Eng, L. M., Schmidt, W. G., &#38; Rüsing, M. (2023). Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>, <i>13</i>(10), Article 1423. <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>","chicago":"Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” <i>Crystals</i> 13, no. 10 (2023). <a href=\"https://doi.org/10.3390/cryst13101423\">https://doi.org/10.3390/cryst13101423</a>.","ieee":"S. Neufeld <i>et al.</i>, “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family,” <i>Crystals</i>, vol. 13, no. 10, Art. no. 1423, 2023, doi: <a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>.","ama":"Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. <i>Crystals</i>. 2023;13(10). doi:<a href=\"https://doi.org/10.3390/cryst13101423\">10.3390/cryst13101423</a>"},"publication_identifier":{"issn":["2073-4352"]},"publication_status":"published","doi":"10.3390/cryst13101423","main_file_link":[{"open_access":"1","url":"https://doi.org/10.3390/cryst13101423"}],"date_updated":"2023-10-11T09:15:58Z","oa":"1","volume":13,"author":[{"last_name":"Neufeld","full_name":"Neufeld, Sergej","first_name":"Sergej"},{"first_name":"Uwe","last_name":"Gerstmann","orcid":"0000-0002-4476-223X","id":"171","full_name":"Gerstmann, Uwe"},{"id":"40300","full_name":"Padberg, Laura","last_name":"Padberg","first_name":"Laura"},{"id":"13244","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","first_name":"Christof"},{"last_name":"Berth","id":"53","full_name":"Berth, Gerhard","first_name":"Gerhard"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"id":"468","full_name":"Schmidt, Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076","first_name":"Wolf Gero"},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"}],"status":"public","type":"journal_article","article_number":"1423","funded_apc":"1","_id":"47997","project":[{"_id":"168","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","grant_number":"231447078"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"grant_number":"PROFILNRW-2020-067","name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266"}],"department":[{"_id":"169"}],"user_id":"22501","year":"2023","quality_controlled":"1","issue":"10","title":"Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family","publisher":"MDPI AG","date_created":"2023-10-11T09:10:53Z","abstract":[{"text":"The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising material group for applications in quantum and nonlinear optics. The fabrication of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric domain structures, requires a profound understanding of the material properties and crystal structure. In this regard, Raman spectroscopy offers the possibility to study and visualize domain structures, strain, defects, and the local stoichiometry, which are all factors impacting device performance. However, the accurate interpretation of Raman spectra and their changes with respect to extrinsic and intrinsic defects requires a thorough assignment of the Raman modes to their respective crystal features, which to date is only partly conducted based on phenomenological modelling. To address this issue, we calculated the phonon spectra of potassium titanyl phosphate and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenate (KTiOAsO4) based on density functional theory and compared them with experimental data. Overall, this allows us to assign various spectral features to eigenmodes of lattice substructures with improved detail compared to previous assignments. Nevertheless, the analysis also shows that not all features of the spectra can unambigiously be explained yet. A possible explanation might be that defects or long range fields not included in the modeling play a crucial rule for the resulting Raman spectrum. In conclusion, this work provides an improved foundation into the vibrational properties in the KTiOPO4 material family.","lang":"eng"}],"publication":"Crystals","keyword":["Inorganic Chemistry","Condensed Matter Physics","General Materials Science","General Chemical Engineering"],"language":[{"iso":"eng"}]},{"year":"2023","publisher":"Elsevier BV","date_created":"2023-12-21T09:30:03Z","title":"Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays","publication":"Photonics and Nanostructures - Fundamentals and Applications","abstract":[{"text":"Silicon photonics, in conjunction with complementary metal-oxide-semiconductor (CMOS) fabrication, has greatly enhanced the development of integrated optical phased arrays. This facilitates a dynamic control of light in a compact form factor that enables the synthesis of arbitrary complex wavefronts in the infrared spectrum. We numerically demonstrate a large-scale two-dimensional silicon-based optical phased array (OPA) composed of nanoantennas with circular gratings that are balanced in power and aligned in phase, required for producing elegant radiation patterns in the far-field. For a wavelength of 1.55 μm, we optimize two antennas for the OPA exhibiting an upward radiation efficiency as high as 90%, with almost 6.8% of optical power concentrated in the field of view. Additionally, we believe that the proposed OPAs can be easily fabricated and would have the ability to generate complex holographic images, rendering them an attractive candidate for a wide range of applications like LiDAR sensors, optical trapping, optogenetic stimulation, and augmented-reality displays.","lang":"eng"}],"file":[{"relation":"main_file","content_type":"application/pdf","access_level":"open_access","file_id":"50013","file_name":"2ß23-12 Farheen - PNFA - Optimized, highly efficient silicon antennas for optical phased arrays.pdf","file_size":3339442,"creator":"fossie","date_created":"2023-12-21T09:34:17Z","date_updated":"2023-12-21T09:34:17Z"}],"ddc":["530"],"keyword":["tet_topic_opticalantenna"],"language":[{"iso":"eng"}],"publication_status":"published","publication_identifier":{"issn":["1569-4410"]},"has_accepted_license":"1","related_material":{"link":[{"url":"https://doi.org/10.5281/zenodo.10044122","relation":"research_data"}]},"citation":{"short":"H. Farheen, A. Strauch, J.C. Scheytt, V. Myroshnychenko, J. Förstner, Photonics and Nanostructures - Fundamentals and Applications 58 (2023) 101207.","mla":"Farheen, Henna, et al. “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.” <i>Photonics and Nanostructures - Fundamentals and Applications</i>, vol. 58, Elsevier BV, 2023, p. 101207, doi:<a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>.","bibtex":"@article{Farheen_Strauch_Scheytt_Myroshnychenko_Förstner_2023, title={Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays}, volume={58}, DOI={<a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>}, journal={Photonics and Nanostructures - Fundamentals and Applications}, publisher={Elsevier BV}, author={Farheen, Henna and Strauch, Andreas and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, year={2023}, pages={101207} }","apa":"Farheen, H., Strauch, A., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner, J. (2023). Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays. <i>Photonics and Nanostructures - Fundamentals and Applications</i>, <i>58</i>, 101207. <a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">https://doi.org/10.1016/j.photonics.2023.101207</a>","ama":"Farheen H, Strauch A, Scheytt JC, Myroshnychenko V, Förstner J. Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays. <i>Photonics and Nanostructures - Fundamentals and Applications</i>. 2023;58:101207. doi:<a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>","chicago":"Farheen, Henna, Andreas Strauch, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays.” <i>Photonics and Nanostructures - Fundamentals and Applications</i> 58 (2023): 101207. <a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">https://doi.org/10.1016/j.photonics.2023.101207</a>.","ieee":"H. Farheen, A. Strauch, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “Optimized, Highly Efficient Silicon Antennas for Optical Phased Arrays,” <i>Photonics and Nanostructures - Fundamentals and Applications</i>, vol. 58, p. 101207, 2023, doi: <a href=\"https://doi.org/10.1016/j.photonics.2023.101207\">10.1016/j.photonics.2023.101207</a>."},"page":"101207","intvolume":"        58","date_updated":"2024-07-22T07:44:33Z","oa":"1","author":[{"first_name":"Henna","id":"53444","full_name":"Farheen, Henna","last_name":"Farheen","orcid":"0000-0001-7730-3489"},{"full_name":"Strauch, Andreas","last_name":"Strauch","first_name":"Andreas"},{"first_name":"J. Christoph","id":"37144","full_name":"Scheytt, J. Christoph","last_name":"Scheytt","orcid":"0000-0002-5950-6618 "},{"first_name":"Viktor","last_name":"Myroshnychenko","id":"46371","full_name":"Myroshnychenko, Viktor"},{"orcid":"0000-0001-7059-9862","last_name":"Förstner","full_name":"Förstner, Jens","id":"158","first_name":"Jens"}],"volume":58,"doi":"10.1016/j.photonics.2023.101207","type":"journal_article","status":"public","project":[{"grant_number":"PROFILNRW-2020-067","_id":"266","name":"PhoQC: PhoQC: Photonisches Quantencomputing"},{"name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)","_id":"167","grant_number":"231447078"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"_id":"50012","user_id":"158","department":[{"_id":"61"},{"_id":"230"},{"_id":"429"},{"_id":"58"}],"file_date_updated":"2023-12-21T09:34:17Z"},{"title":"Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas","doi":"10.1109/ipc57732.2023.10360519","date_updated":"2024-07-22T07:48:53Z","publisher":"IEEE","author":[{"last_name":"Farheen","orcid":"0000-0001-7730-3489","full_name":"Farheen, Henna","id":"53444","first_name":"Henna"},{"first_name":"S.","last_name":"Joshi","full_name":"Joshi, S."},{"first_name":"J. Christoph","full_name":"Scheytt, J. Christoph","id":"37144","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt"},{"first_name":"Viktor","id":"46371","full_name":"Myroshnychenko, Viktor","last_name":"Myroshnychenko"},{"last_name":"Förstner","orcid":"0000-0001-7059-9862","full_name":"Förstner, Jens","id":"158","first_name":"Jens"}],"date_created":"2024-01-12T07:37:54Z","year":"2023","citation":{"mla":"Farheen, Henna, et al. “Increasing the Upward Radiation Efficiency of Optical Phased Arrays Using Asymmetric Silicon Horn Antennas.” <i>2023 IEEE Photonics Conference (IPC)</i>, IEEE, 2023, doi:<a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>.","short":"H. Farheen, S. Joshi, J.C. Scheytt, V. Myroshnychenko, J. Förstner, in: 2023 IEEE Photonics Conference (IPC), IEEE, 2023.","bibtex":"@inproceedings{Farheen_Joshi_Scheytt_Myroshnychenko_Förstner_2023, title={Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas}, DOI={<a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>}, booktitle={2023 IEEE Photonics Conference (IPC)}, publisher={IEEE}, author={Farheen, Henna and Joshi, S. and Scheytt, J. Christoph and Myroshnychenko, Viktor and Förstner, Jens}, year={2023} }","apa":"Farheen, H., Joshi, S., Scheytt, J. C., Myroshnychenko, V., &#38; Förstner, J. (2023). Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas. <i>2023 IEEE Photonics Conference (IPC)</i>. <a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">https://doi.org/10.1109/ipc57732.2023.10360519</a>","ieee":"H. Farheen, S. Joshi, J. C. Scheytt, V. Myroshnychenko, and J. Förstner, “Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas,” 2023, doi: <a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>.","chicago":"Farheen, Henna, S. Joshi, J. Christoph Scheytt, Viktor Myroshnychenko, and Jens Förstner. “Increasing the Upward Radiation Efficiency of Optical Phased Arrays Using Asymmetric Silicon Horn Antennas.” In <i>2023 IEEE Photonics Conference (IPC)</i>. IEEE, 2023. <a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">https://doi.org/10.1109/ipc57732.2023.10360519</a>.","ama":"Farheen H, Joshi S, Scheytt JC, Myroshnychenko V, Förstner J. Increasing the upward radiation efficiency of optical phased arrays using asymmetric silicon horn antennas. In: <i>2023 IEEE Photonics Conference (IPC)</i>. IEEE; 2023. doi:<a href=\"https://doi.org/10.1109/ipc57732.2023.10360519\">10.1109/ipc57732.2023.10360519</a>"},"publication_status":"published","keyword":["tet_topic_opticalantenna"],"language":[{"iso":"eng"}],"_id":"50466","project":[{"name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266","grant_number":"PROFILNRW-2020-067"},{"grant_number":"231447078","_id":"167","name":"TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)"},{"name":"TRR 142 - C05: TRR 142 - Nichtlineare optische Oberflächen basierend auf ZnO-plasmonischen Hybrid-Nanostrukturen (C05)","_id":"75","grant_number":"231447078"},{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"}],"department":[{"_id":"61"},{"_id":"230"},{"_id":"429"}],"user_id":"158","abstract":[{"text":"A key challenge in designing efficient optical phased arrays is the lack of a well-designed radiator. This work explores horn antennas numerically optimized to target high upward radiation efficiency to be employed in silicon-based phased arrays capable of producing elegant radiation patterns in the far-field.","lang":"eng"}],"status":"public","publication":"2023 IEEE Photonics Conference (IPC)","type":"conference"},{"article_number":"2300142","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"},{"name":"TRR 142; TP B06: Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems","_id":"167"},{"_id":"173","name":"TRR 142; TP C09: Ideale Erzeugung von Photonenpaaren für Verschränkungsaustausch bei Telekom Wellenlängen"},{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"}],"_id":"61252","status":"public","type":"journal_article","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 D.","full_name":"Jöns, Klaus D.","id":"85353","last_name":"Jöns"},{"id":"158","full_name":"Förstner, Jens","last_name":"Förstner","orcid":"0000-0001-7059-9862","first_name":"Jens"},{"first_name":"Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher","id":"27271","full_name":"Schumacher, Stefan"}],"volume":7,"date_updated":"2025-09-12T11:16:12Z","citation":{"apa":"Bauch, D., Siebert, D., Jöns, K. D., Förstner, J., &#38; Schumacher, S. (2023). On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. <i>Advanced Quantum Technologies</i>, <i>7</i>(1), Article 2300142. <a href=\"https://doi.org/10.1002/qute.202300142\">https://doi.org/10.1002/qute.202300142</a>","bibtex":"@article{Bauch_Siebert_Jöns_Förstner_Schumacher_2023, title={On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs}, volume={7}, DOI={<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>}, 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.” <i>Advanced Quantum Technologies</i>, vol. 7, no. 1, 2300142, Wiley, 2023, doi:<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>.","ama":"Bauch D, Siebert D, Jöns KD, Förstner J, Schumacher S. On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs. <i>Advanced Quantum Technologies</i>. 2023;7(1). doi:<a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>","chicago":"Bauch, David, Dustin Siebert, Klaus D. Jöns, Jens Förstner, and Stefan Schumacher. “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs.” <i>Advanced Quantum Technologies</i> 7, no. 1 (2023). <a href=\"https://doi.org/10.1002/qute.202300142\">https://doi.org/10.1002/qute.202300142</a>.","ieee":"D. Bauch, D. Siebert, K. D. Jöns, J. Förstner, and S. Schumacher, “On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs,” <i>Advanced Quantum Technologies</i>, vol. 7, no. 1, Art. no. 2300142, 2023, doi: <a href=\"https://doi.org/10.1002/qute.202300142\">10.1002/qute.202300142</a>."},"intvolume":"         7","publication_status":"published","publication_identifier":{"issn":["2511-9044","2511-9044"]},"language":[{"iso":"eng"}],"abstract":[{"text":"<jats:title>Abstract</jats:title><jats:p>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, 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.</jats:p>","lang":"eng"}],"publication":"Advanced Quantum Technologies","title":"On‐Demand Indistinguishable and Entangled Photons Using Tailored Cavity Designs","date_created":"2025-09-12T11:11:56Z","publisher":"Wiley","year":"2023","issue":"1"},{"doi":"10.1364/ome.497006","title":"Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]","author":[{"last_name":"Lüders","full_name":"Lüders, Carolin","first_name":"Carolin"},{"first_name":"Franziska","last_name":"Barkhausen","id":"63631","full_name":"Barkhausen, Franziska"},{"first_name":"Matthias","last_name":"Pukrop","full_name":"Pukrop, Matthias"},{"full_name":"Rozas, Elena","last_name":"Rozas","first_name":"Elena"},{"first_name":"Jan","full_name":"Sperling, Jan","id":"75127","last_name":"Sperling","orcid":"0000-0002-5844-3205"},{"first_name":"Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher","id":"27271","full_name":"Schumacher, Stefan"},{"full_name":"Aßmann, Marc","last_name":"Aßmann","first_name":"Marc"}],"date_created":"2025-09-12T11:40:26Z","volume":13,"date_updated":"2025-09-12T11:41:42Z","publisher":"Optica Publishing Group","citation":{"apa":"Lüders, C., Barkhausen, F., Pukrop, M., Rozas, E., Sperling, J., Schumacher, S., &#38; Aßmann, M. (2023). Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]. <i>Optical Materials Express</i>, <i>13</i>(11), Article 2997. <a href=\"https://doi.org/10.1364/ome.497006\">https://doi.org/10.1364/ome.497006</a>","bibtex":"@article{Lüders_Barkhausen_Pukrop_Rozas_Sperling_Schumacher_Aßmann_2023, title={Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]}, volume={13}, DOI={<a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>}, number={112997}, journal={Optical Materials Express}, publisher={Optica Publishing Group}, author={Lüders, Carolin and Barkhausen, Franziska and Pukrop, Matthias and Rozas, Elena and Sperling, Jan and Schumacher, Stefan and Aßmann, Marc}, year={2023} }","short":"C. Lüders, F. Barkhausen, M. Pukrop, E. Rozas, J. Sperling, S. Schumacher, M. Aßmann, Optical Materials Express 13 (2023).","mla":"Lüders, Carolin, et al. “Continuous-Variable Quantum Optics and Resource Theory for Ultrafast Semiconductor Spectroscopy [Invited].” <i>Optical Materials Express</i>, vol. 13, no. 11, 2997, Optica Publishing Group, 2023, doi:<a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>.","ieee":"C. Lüders <i>et al.</i>, “Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited],” <i>Optical Materials Express</i>, vol. 13, no. 11, Art. no. 2997, 2023, doi: <a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>.","chicago":"Lüders, Carolin, Franziska Barkhausen, Matthias Pukrop, Elena Rozas, Jan Sperling, Stefan Schumacher, and Marc Aßmann. “Continuous-Variable Quantum Optics and Resource Theory for Ultrafast Semiconductor Spectroscopy [Invited].” <i>Optical Materials Express</i> 13, no. 11 (2023). <a href=\"https://doi.org/10.1364/ome.497006\">https://doi.org/10.1364/ome.497006</a>.","ama":"Lüders C, Barkhausen F, Pukrop M, et al. Continuous-variable quantum optics and resource theory for ultrafast semiconductor spectroscopy [Invited]. <i>Optical Materials Express</i>. 2023;13(11). doi:<a href=\"https://doi.org/10.1364/ome.497006\">10.1364/ome.497006</a>"},"intvolume":"        13","year":"2023","issue":"11","publication_status":"published","publication_identifier":{"issn":["2159-3930"]},"language":[{"iso":"eng"}],"article_number":"2997","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"297"},{"_id":"706"},{"_id":"35"},{"_id":"230"},{"_id":"27"},{"_id":"623"}],"project":[{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"_id":"266","name":"PhoQC: Photonisches Quantencomputing"}],"_id":"61266","status":"public","abstract":[{"text":"<jats:p>This review examines the use of continuous-variable spectroscopy techniques for investigating quantum coherence and light-matter interactions in semiconductor systems with ultrafast dynamics. Special emphasis is placed on multichannel homodyne detection as a powerful tool to measure the quantum coherence and the full density matrix of a polariton system. Observations, such as coherence times that exceed the nanosecond scale obtained by monitoring the temporal decay of quantum coherence in a polariton condensate, are discussed. Proof-of-concept experiments and numerical simulations that demonstrate the enhanced resourcefulness of the produced system states for modern quantum protocols are assessed. The combination of tailored resource quantifiers and ultrafast spectroscopy techniques that have recently been demonstrated paves the way for future applications of quantum information technologies.</jats:p>","lang":"eng"}],"type":"journal_article","publication":"Optical Materials Express"}]