[{"doi":"10.1103/jmy9-bd3l","article_number":"033296","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2025-12-11T12:52:24Z","intvolume":"         7","title":"Spectral correlations of dynamical resonance fluorescence","year":"2025","author":[{"full_name":"Bermúdez-Feijóo, Santiago","last_name":"Bermúdez-Feijóo","first_name":"Santiago"},{"full_name":"Zubizarreta Casalengua, Eduardo","last_name":"Zubizarreta Casalengua","first_name":"Eduardo"},{"first_name":"Kai","last_name":"Müller","full_name":"Müller, Kai"},{"id":"85353","first_name":"Klaus","last_name":"Jöns","full_name":"Jöns, Klaus"}],"publication_identifier":{"issn":["2643-1564"]},"type":"journal_article","department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"date_created":"2025-12-04T12:19:04Z","abstract":[{"lang":"eng","text":"<jats:p>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.</jats:p>"}],"issue":"3","publication":"Physical Review Research","user_id":"48188","volume":7,"publisher":"American Physical Society (APS)","_id":"62859","status":"public","citation":{"apa":"Bermúdez-Feijóo, S., Zubizarreta Casalengua, E., Müller, K., &#38; Jöns, K. (2025). Spectral correlations of dynamical resonance fluorescence. <i>Physical Review Research</i>, <i>7</i>(3), Article 033296. <a href=\"https://doi.org/10.1103/jmy9-bd3l\">https://doi.org/10.1103/jmy9-bd3l</a>","ieee":"S. Bermúdez-Feijóo, E. Zubizarreta Casalengua, K. Müller, and K. Jöns, “Spectral correlations of dynamical resonance fluorescence,” <i>Physical Review Research</i>, vol. 7, no. 3, Art. no. 033296, 2025, doi: <a href=\"https://doi.org/10.1103/jmy9-bd3l\">10.1103/jmy9-bd3l</a>.","short":"S. Bermúdez-Feijóo, E. Zubizarreta Casalengua, K. Müller, K. Jöns, Physical Review Research 7 (2025).","chicago":"Bermúdez-Feijóo, Santiago, Eduardo Zubizarreta Casalengua, Kai Müller, and Klaus Jöns. “Spectral Correlations of Dynamical Resonance Fluorescence.” <i>Physical Review Research</i> 7, no. 3 (2025). <a href=\"https://doi.org/10.1103/jmy9-bd3l\">https://doi.org/10.1103/jmy9-bd3l</a>.","mla":"Bermúdez-Feijóo, Santiago, et al. “Spectral Correlations of Dynamical Resonance Fluorescence.” <i>Physical Review Research</i>, vol. 7, no. 3, 033296, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/jmy9-bd3l\">10.1103/jmy9-bd3l</a>.","ama":"Bermúdez-Feijóo S, Zubizarreta Casalengua E, Müller K, Jöns K. Spectral correlations of dynamical resonance fluorescence. <i>Physical Review Research</i>. 2025;7(3). doi:<a href=\"https://doi.org/10.1103/jmy9-bd3l\">10.1103/jmy9-bd3l</a>","bibtex":"@article{Bermúdez-Feijóo_Zubizarreta Casalengua_Müller_Jöns_2025, title={Spectral correlations of dynamical resonance fluorescence}, volume={7}, DOI={<a href=\"https://doi.org/10.1103/jmy9-bd3l\">10.1103/jmy9-bd3l</a>}, 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} }"}},{"_id":"63050","user_id":"112030","publication_date":"2025/05/29","title":"Beam steering device and electronic apparatus including the same","year":"2025","status":"public","author":[{"first_name":"Nicholas Alexander","last_name":"Güsken","orcid":"0000-0002-4816-0666","full_name":"Güsken, Nicholas Alexander","id":"112030"}],"date_updated":"2025-12-11T20:46:30Z","ipn":"18957248","application_number":"18957248","date_created":"2025-12-11T20:43:18Z","type":"patent","department":[{"_id":"623"},{"_id":"15"},{"_id":"230"}],"citation":{"ama":"Güsken NA. Beam steering device and electronic apparatus including the same. Published online 2025.","bibtex":"@article{Güsken_2025, title={Beam steering device and electronic apparatus including the same}, author={Güsken, Nicholas Alexander}, year={2025} }","mla":"Güsken, Nicholas Alexander. <i>Beam Steering Device and Electronic Apparatus Including the Same</i>. 2025.","chicago":"Güsken, Nicholas Alexander. “Beam Steering Device and Electronic Apparatus Including the Same,” 2025.","short":"N.A. Güsken, (2025).","apa":"Güsken, N. A. (2025). <i>Beam steering device and electronic apparatus including the same</i>.","ieee":"N. A. Güsken, “Beam steering device and electronic apparatus including the same.” 2025."},"ipc":"US20250172751A1"},{"publisher":"Optica Publishing Group","_id":"62269","volume":33,"user_id":"49683","status":"public","oa":"1","citation":{"ama":"Lange NA, Lengeling S, Mues P, et al. Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides. <i>Optics Express</i>. 2025;33(24). doi:<a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>","bibtex":"@article{Lange_Lengeling_Mues_Quiring_Ridder_Eigner_Herrmann_Silberhorn_Bartley_2025, title={Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides}, volume={33}, DOI={<a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>}, number={2450451}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Lange, Nina Amelie and Lengeling, Sebastian and Mues, Philipp and Quiring, Viktor and Ridder, Werner and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine and Bartley, Tim}, year={2025} }","mla":"Lange, Nina Amelie, et al. “Widely Non-Degenerate Nonlinear Frequency Conversion in Cryogenic Titanium in-Diffused Lithium Niobate Waveguides.” <i>Optics Express</i>, vol. 33, no. 24, 50451, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>.","short":"N.A. Lange, S. Lengeling, P. Mues, V. Quiring, W. Ridder, C. Eigner, H. Herrmann, C. Silberhorn, T. Bartley, Optics Express 33 (2025).","chicago":"Lange, Nina Amelie, Sebastian Lengeling, Philipp Mues, Viktor Quiring, Werner Ridder, Christof Eigner, Harald Herrmann, Christine Silberhorn, and Tim Bartley. “Widely Non-Degenerate Nonlinear Frequency Conversion in Cryogenic Titanium in-Diffused Lithium Niobate Waveguides.” <i>Optics Express</i> 33, no. 24 (2025). <a href=\"https://doi.org/10.1364/oe.578108\">https://doi.org/10.1364/oe.578108</a>.","apa":"Lange, N. A., Lengeling, S., Mues, P., Quiring, V., Ridder, W., Eigner, C., Herrmann, H., Silberhorn, C., &#38; Bartley, T. (2025). Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides. <i>Optics Express</i>, <i>33</i>(24), Article 50451. <a href=\"https://doi.org/10.1364/oe.578108\">https://doi.org/10.1364/oe.578108</a>","ieee":"N. A. Lange <i>et al.</i>, “Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides,” <i>Optics Express</i>, vol. 33, no. 24, Art. no. 50451, 2025, doi: <a href=\"https://doi.org/10.1364/oe.578108\">10.1364/oe.578108</a>."},"project":[{"name":"TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher Filterung unter Verwendung integrierter supraleitender Detektoren","_id":"171"}],"language":[{"iso":"eng"}],"article_number":"50451","main_file_link":[{"open_access":"1"}],"doi":"10.1364/oe.578108","author":[{"full_name":"Lange, Nina Amelie","orcid":"0000-0001-6624-7098","first_name":"Nina Amelie","last_name":"Lange","id":"56843"},{"first_name":"Sebastian","last_name":"Lengeling","full_name":"Lengeling, Sebastian","id":"44373"},{"id":"49772","orcid":"0000-0003-0643-7636","first_name":"Philipp","last_name":"Mues","full_name":"Mues, Philipp"},{"first_name":"Viktor","last_name":"Quiring","full_name":"Quiring, Viktor"},{"last_name":"Ridder","first_name":"Werner","full_name":"Ridder, Werner","id":"63574"},{"full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof","last_name":"Eigner","id":"13244"},{"full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald","id":"216"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"},{"id":"49683","first_name":"Tim","last_name":"Bartley","full_name":"Bartley, Tim"}],"publication_identifier":{"issn":["1094-4087"]},"year":"2025","title":"Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides","article_type":"original","intvolume":"        33","publication_status":"published","date_updated":"2025-12-12T12:13:45Z","date_created":"2025-11-20T10:35:35Z","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","publication":"Optics Express","issue":"24","abstract":[{"lang":"eng","text":"The titanium in-diffused lithium niobate waveguide platform is well-established for reliable prototyping and packaging of many quantum photonic components at room temperature. Nevertheless, compatibility with certain quantum light sources and superconducting detectors requires operation under cryogenic conditions. We characterize alterations in phase-matching and mode guiding of a non-degenerate spontaneous parametric down-conversion process emitting around 1556 nm and 950 nm, under cryogenic conditions. Despite the effects of pyroelectricity and photorefraction, the spectral properties match our theoretical model. Nevertheless, these effects cause small but significant variations within and between cooling cycles. These measurements provide a first benchmark against which other nonlinear photonic integration platforms, such as thin-film lithium niobate, can be compared."}]},{"status":"public","title":"Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes","year":"2025","author":[{"full_name":"Brockmeier, Julian","last_name":"Brockmeier","first_name":"Julian","id":"44807"},{"id":"55629","full_name":"Schapeler, Timon","last_name":"Schapeler","orcid":"0000-0001-7652-1716","first_name":"Timon"},{"full_name":"Lange, Nina Amelie","orcid":"0000-0001-6624-7098","last_name":"Lange","first_name":"Nina Amelie","id":"56843"},{"last_name":"Höpker","first_name":"Jan Philipp","full_name":"Höpker, Jan Philipp","id":"33913"},{"id":"216","first_name":"Harald","last_name":"Herrmann","full_name":"Herrmann, Harald"},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"},{"full_name":"Bartley, Tim","first_name":"Tim","last_name":"Bartley","id":"49683"}],"date_updated":"2025-12-15T09:21:29Z","main_file_link":[{"open_access":"1"}],"_id":"60466","language":[{"iso":"eng"}],"user_id":"56843","doi":"10.1088/1367-2630/ade46c","publication":"New Journal of Physics","citation":{"ieee":"J. Brockmeier <i>et al.</i>, “Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes,” <i>New Journal of Physics</i>, 2025, doi: <a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>.","apa":"Brockmeier, J., Schapeler, T., Lange, N. A., Höpker, J. P., Herrmann, H., Silberhorn, C., &#38; Bartley, T. (2025). Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes. <i>New Journal of Physics</i>. <a href=\"https://doi.org/10.1088/1367-2630/ade46c\">https://doi.org/10.1088/1367-2630/ade46c</a>","short":"J. Brockmeier, T. Schapeler, N.A. Lange, J.P. Höpker, H. Herrmann, C. Silberhorn, T. Bartley, New Journal of Physics (2025).","chicago":"Brockmeier, Julian, Timon Schapeler, Nina Amelie Lange, Jan Philipp Höpker, Harald Herrmann, Christine Silberhorn, and Tim Bartley. “Harnessing Temporal Dispersion for Integrated Pump Filtering in Spontaneous Heralded Single-Photon Generation Processes.” <i>New Journal of Physics</i>, 2025. <a href=\"https://doi.org/10.1088/1367-2630/ade46c\">https://doi.org/10.1088/1367-2630/ade46c</a>.","mla":"Brockmeier, Julian, et al. “Harnessing Temporal Dispersion for Integrated Pump Filtering in Spontaneous Heralded Single-Photon Generation Processes.” <i>New Journal of Physics</i>, 2025, doi:<a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>.","bibtex":"@article{Brockmeier_Schapeler_Lange_Höpker_Herrmann_Silberhorn_Bartley_2025, title={Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes}, DOI={<a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>}, journal={New Journal of Physics}, author={Brockmeier, Julian and Schapeler, Timon and Lange, Nina Amelie and Höpker, Jan Philipp and Herrmann, Harald and Silberhorn, Christine and Bartley, Tim}, year={2025} }","ama":"Brockmeier J, Schapeler T, Lange NA, et al. Harnessing temporal dispersion for integrated pump filtering in spontaneous heralded single-photon generation processes. <i>New Journal of Physics</i>. Published online 2025. doi:<a href=\"https://doi.org/10.1088/1367-2630/ade46c\">10.1088/1367-2630/ade46c</a>"},"project":[{"_id":"171","name":"TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher Filterung unter Verwendung integrierter supraleitender Detektoren"}],"date_created":"2025-06-30T08:58:37Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"}],"oa":"1"},{"volume":112,"user_id":"16199","_id":"63160","publisher":"American Physical Society (APS)","status":"public","project":[{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - Project Area A","_id":"54"},{"_id":"59","name":"TRR 142; TP A02: Nichtlineare Spektroskopie von Halbleiter-Nanostrukturen mit Quantenlicht"},{"name":"Hochleistungsrechner Noctua in Paderborn","_id":"445"},{"name":"Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"},{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"citation":{"bibtex":"@article{Rose_Schumacher_Meier_2025, title={Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons}, volume={112}, DOI={<a href=\"https://doi.org/10.1103/528f-7smh\">10.1103/528f-7smh</a>}, number={24245304}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Rose, Hendrik and Schumacher, Stefan and Meier, Torsten}, year={2025} }","ama":"Rose H, Schumacher S, Meier T. Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons. <i>Physical Review B</i>. 2025;112(24). doi:<a href=\"https://doi.org/10.1103/528f-7smh\">10.1103/528f-7smh</a>","short":"H. Rose, S. Schumacher, T. Meier, Physical Review B 112 (2025).","chicago":"Rose, Hendrik, Stefan Schumacher, and Torsten Meier. “Microscopic Approach to the Quantized Light-Matter Interaction in Semiconductor Nanostructures: Complex Coupled Dynamics of Excitons, Biexcitons, and Photons.” <i>Physical Review B</i> 112, no. 24 (2025). <a href=\"https://doi.org/10.1103/528f-7smh\">https://doi.org/10.1103/528f-7smh</a>.","ieee":"H. Rose, S. Schumacher, and T. Meier, “Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons,” <i>Physical Review B</i>, vol. 112, no. 24, Art. no. 245304, 2025, doi: <a href=\"https://doi.org/10.1103/528f-7smh\">10.1103/528f-7smh</a>.","mla":"Rose, Hendrik, et al. “Microscopic Approach to the Quantized Light-Matter Interaction in Semiconductor Nanostructures: Complex Coupled Dynamics of Excitons, Biexcitons, and Photons.” <i>Physical Review B</i>, vol. 112, no. 24, 245304, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/528f-7smh\">10.1103/528f-7smh</a>.","apa":"Rose, H., Schumacher, S., &#38; Meier, T. (2025). Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons. <i>Physical Review B</i>, <i>112</i>(24), Article 245304. <a href=\"https://doi.org/10.1103/528f-7smh\">https://doi.org/10.1103/528f-7smh</a>"},"doi":"10.1103/528f-7smh","language":[{"iso":"eng"}],"article_number":"245304","intvolume":"       112","date_updated":"2025-12-16T15:52:55Z","publication_status":"published","publication_identifier":{"issn":["2469-9950","2469-9969"]},"author":[{"full_name":"Rose, Hendrik","last_name":"Rose","first_name":"Hendrik","orcid":"0000-0002-3079-5428","id":"55958"},{"full_name":"Schumacher, Stefan","first_name":"Stefan","orcid":"0000-0003-4042-4951","last_name":"Schumacher","id":"27271"},{"id":"344","full_name":"Meier, Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072","first_name":"Torsten"}],"year":"2025","title":"Microscopic approach to the quantized light-matter interaction in semiconductor nanostructures: Complex coupled dynamics of excitons, biexcitons, and photons","department":[{"_id":"15"},{"_id":"170"},{"_id":"293"},{"_id":"297"},{"_id":"623"},{"_id":"429"},{"_id":"230"},{"_id":"35"},{"_id":"27"}],"type":"journal_article","date_created":"2025-12-16T15:50:42Z","issue":"24","publication":"Physical Review B"},{"date_created":"2025-12-04T12:20:57Z","department":[{"_id":"623"},{"_id":"15"},{"_id":"429"},{"_id":"642"}],"type":"journal_article","publication":"Nature Communications","issue":"1","language":[{"iso":"eng"}],"article_number":"10028","doi":"10.1038/s41467-025-65911-9","publication_identifier":{"issn":["2041-1723"]},"author":[{"last_name":"Laneve","first_name":"Alessandro","full_name":"Laneve, Alessandro"},{"last_name":"Ronco","first_name":"Giuseppe","full_name":"Ronco, Giuseppe"},{"first_name":"Mattia","last_name":"Beccaceci","full_name":"Beccaceci, Mattia"},{"first_name":"Paolo","last_name":"Barigelli","full_name":"Barigelli, Paolo"},{"id":"94793","full_name":"Salusti, Francesco","first_name":"Francesco","last_name":"Salusti"},{"first_name":"Nicolas","last_name":"Claro-Rodriguez","full_name":"Claro-Rodriguez, Nicolas"},{"last_name":"De Pascalis","first_name":"Giorgio","full_name":"De Pascalis, Giorgio"},{"full_name":"Suprano, Alessia","last_name":"Suprano","first_name":"Alessia"},{"full_name":"Chiaudano, Leone","first_name":"Leone","last_name":"Chiaudano"},{"last_name":"Schöll","first_name":"Eva","full_name":"Schöll, Eva"},{"first_name":"Lukas","last_name":"Hanschke","full_name":"Hanschke, Lukas"},{"last_name":"Krieger","first_name":"Tobias M.","full_name":"Krieger, Tobias M."},{"full_name":"Buchinger, Quirin","first_name":"Quirin","last_name":"Buchinger"},{"full_name":"Covre da Silva, Saimon F.","first_name":"Saimon F.","last_name":"Covre da Silva"},{"first_name":"Julia","last_name":"Neuwirth","full_name":"Neuwirth, Julia"},{"full_name":"Stroj, Sandra","last_name":"Stroj","first_name":"Sandra"},{"full_name":"Höfling, Sven","first_name":"Sven","last_name":"Höfling"},{"first_name":"Tobias","last_name":"Huber-Loyola","full_name":"Huber-Loyola, Tobias"},{"first_name":"Mario A.","last_name":"Usuga Castaneda","full_name":"Usuga Castaneda, Mario A."},{"first_name":"Gonzalo","last_name":"Carvacho","full_name":"Carvacho, Gonzalo"},{"full_name":"Spagnolo, Nicolò","last_name":"Spagnolo","first_name":"Nicolò"},{"first_name":"Michele B.","last_name":"Rota","full_name":"Rota, Michele B."},{"first_name":"Francesco","last_name":"Basso Basset","full_name":"Basso Basset, Francesco"},{"full_name":"Rastelli, Armando","last_name":"Rastelli","first_name":"Armando"},{"full_name":"Sciarrino, Fabio","first_name":"Fabio","last_name":"Sciarrino"},{"first_name":"Klaus","last_name":"Jöns","full_name":"Jöns, Klaus","id":"85353"},{"full_name":"Trotta, Rinaldo","last_name":"Trotta","first_name":"Rinaldo"}],"title":"Quantum teleportation with dissimilar quantum dots over a hybrid quantum network","year":"2025","intvolume":"        16","publication_status":"published","date_updated":"2025-12-17T11:36:14Z","citation":{"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.” <i>Nature Communications</i> 16, no. 1 (2025). <a href=\"https://doi.org/10.1038/s41467-025-65911-9\">https://doi.org/10.1038/s41467-025-65911-9</a>.","ama":"Laneve A, Ronco G, Beccaceci M, et al. Quantum teleportation with dissimilar quantum dots over a hybrid quantum network. <i>Nature Communications</i>. 2025;16(1). doi:<a href=\"https://doi.org/10.1038/s41467-025-65911-9\">10.1038/s41467-025-65911-9</a>","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).","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={<a href=\"https://doi.org/10.1038/s41467-025-65911-9\">10.1038/s41467-025-65911-9</a>}, 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} }","mla":"Laneve, Alessandro, et al. “Quantum Teleportation with Dissimilar Quantum Dots over a Hybrid Quantum Network.” <i>Nature Communications</i>, vol. 16, no. 1, 10028, Springer Science and Business Media LLC, 2025, doi:<a href=\"https://doi.org/10.1038/s41467-025-65911-9\">10.1038/s41467-025-65911-9</a>.","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. <i>Nature Communications</i>, <i>16</i>(1), Article 10028. <a href=\"https://doi.org/10.1038/s41467-025-65911-9\">https://doi.org/10.1038/s41467-025-65911-9</a>","ieee":"A. Laneve <i>et al.</i>, “Quantum teleportation with dissimilar quantum dots over a hybrid quantum network,” <i>Nature Communications</i>, vol. 16, no. 1, Art. no. 10028, 2025, doi: <a href=\"https://doi.org/10.1038/s41467-025-65911-9\">10.1038/s41467-025-65911-9</a>."},"_id":"62861","publisher":"Springer Science and Business Media LLC","volume":16,"user_id":"48188","status":"public"},{"publication":"Optics & Laser Technology","abstract":[{"text":"Lithium niobate (LiNbO3) is a widely used material with several desirable physical properties, such as high second-order nonlinear optical and strong electro-optical effects. Thus LiNbO3 is used for various applications such as electro-optic modulation or nonlinear frequency conversion and mixing. But LiNbO3 also exhibits a strong photorefractive effect, which limits the intensity of the optical fields involved. Various approaches to reduce the photorefractive effect have been investigated, such as increasing the temperature, doping the crystal or using different waveguide designs in LiNbO3. Here, we present an analysis of the approach to increase the photorefractive damage threshold by using different waveguide designs. Contrary to previous claims and investigations, our SHG measurements revealed no significant difference in resistance to photorefractive damage when comparing conventional Ti-doped channel waveguides and Ti-doped diced ridge waveguides in LiNbO3. Furthermore, we have investigated the effect of photorefractive cleaning and curing using a light field at 532 nm. Here, we observe a reduction in the photorefractive effect at room temperature during and after SHG measurements, which is an easy alternative to conventional approaches.","lang":"eng"}],"date_created":"2025-12-18T08:17:57Z","type":"journal_article","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"title":"Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides","year":"2025","author":[{"id":"69553","last_name":"Kirsch","first_name":"Michelle","full_name":"Kirsch, Michelle"},{"id":"44252","full_name":"Kießler, Christian","last_name":"Kießler","first_name":"Christian"},{"full_name":"Lengeling, Sebastian","first_name":"Sebastian","last_name":"Lengeling","id":"44373"},{"id":"42777","first_name":"Michael","last_name":"Stefszky","full_name":"Stefszky, Michael"},{"id":"13244","full_name":"Eigner, Christof","first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083"},{"full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald","id":"216"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"publication_identifier":{"issn":["0030-3992"]},"date_updated":"2025-12-18T08:27:13Z","publication_status":"published","intvolume":"       193","article_type":"original","main_file_link":[{"open_access":"1","url":"https://www.sciencedirect.com/science/article/pii/S0030399225018511?via%3Dihub"}],"article_number":"114260","language":[{"iso":"eng"}],"doi":"10.1016/j.optlastec.2025.114260","citation":{"ieee":"M. Kirsch <i>et al.</i>, “Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides,” <i>Optics &#38; Laser Technology</i>, vol. 193, Art. no. 114260, 2025, doi: <a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>.","apa":"Kirsch, M., Kießler, C., Lengeling, S., Stefszky, M., Eigner, C., Herrmann, H., &#38; Silberhorn, C. (2025). Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides. <i>Optics &#38; Laser Technology</i>, <i>193</i>, Article 114260. <a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">https://doi.org/10.1016/j.optlastec.2025.114260</a>","short":"M. Kirsch, C. Kießler, S. Lengeling, M. Stefszky, C. Eigner, H. Herrmann, C. Silberhorn, Optics &#38; Laser Technology 193 (2025).","chicago":"Kirsch, Michelle, Christian Kießler, Sebastian Lengeling, Michael Stefszky, Christof Eigner, Harald Herrmann, and Christine Silberhorn. “Photorefraction and In-Situ Optical Cleaning in Various Types of LiNbO3 Waveguides.” <i>Optics &#38; Laser Technology</i> 193 (2025). <a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">https://doi.org/10.1016/j.optlastec.2025.114260</a>.","mla":"Kirsch, Michelle, et al. “Photorefraction and In-Situ Optical Cleaning in Various Types of LiNbO3 Waveguides.” <i>Optics &#38; Laser Technology</i>, vol. 193, 114260, Elsevier BV, 2025, doi:<a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>.","bibtex":"@article{Kirsch_Kießler_Lengeling_Stefszky_Eigner_Herrmann_Silberhorn_2025, title={Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides}, volume={193}, DOI={<a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>}, number={114260}, journal={Optics &#38; Laser Technology}, publisher={Elsevier BV}, author={Kirsch, Michelle and Kießler, Christian and Lengeling, Sebastian and Stefszky, Michael and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine}, year={2025} }","ama":"Kirsch M, Kießler C, Lengeling S, et al. Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides. <i>Optics &#38; Laser Technology</i>. 2025;193. doi:<a href=\"https://doi.org/10.1016/j.optlastec.2025.114260\">10.1016/j.optlastec.2025.114260</a>"},"quality_controlled":"1","oa":"1","status":"public","publisher":"Elsevier BV","_id":"63192","user_id":"69553","volume":193},{"volume":7,"user_id":"27150","_id":"63213","publisher":"American Physical Society (APS)","status":"public","citation":{"short":"L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn, Physical Review Research 7 (2025).","ama":"Serino LM, Chesi G, Brecht B, Maccone L, Macchiavello C, Silberhorn C. Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations. <i>Physical Review Research</i>. 2025;7(3). doi:<a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>","chicago":"Serino, Laura Maria, Giovanni Chesi, Benjamin Brecht, Lorenzo Maccone, Chiara Macchiavello, and Christine Silberhorn. “Complementarity-Based Complementarity: The Choice of Mutually Unbiased Observables Shapes Quantum Uncertainty Relations.” <i>Physical Review Research</i> 7, no. 3 (2025). <a href=\"https://doi.org/10.1103/v24q-sl6n\">https://doi.org/10.1103/v24q-sl6n</a>.","bibtex":"@article{Serino_Chesi_Brecht_Maccone_Macchiavello_Silberhorn_2025, title={Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations}, volume={7}, DOI={<a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>}, number={3033152}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Serino, Laura Maria and Chesi, Giovanni and Brecht, Benjamin and Maccone, Lorenzo and Macchiavello, Chiara and Silberhorn, Christine}, year={2025} }","apa":"Serino, L. M., Chesi, G., Brecht, B., Maccone, L., Macchiavello, C., &#38; Silberhorn, C. (2025). Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations. <i>Physical Review Research</i>, <i>7</i>(3), Article 033152. <a href=\"https://doi.org/10.1103/v24q-sl6n\">https://doi.org/10.1103/v24q-sl6n</a>","mla":"Serino, Laura Maria, et al. “Complementarity-Based Complementarity: The Choice of Mutually Unbiased Observables Shapes Quantum Uncertainty Relations.” <i>Physical Review Research</i>, vol. 7, no. 3, 033152, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>.","ieee":"L. M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, and C. Silberhorn, “Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations,” <i>Physical Review Research</i>, vol. 7, no. 3, Art. no. 033152, 2025, doi: <a href=\"https://doi.org/10.1103/v24q-sl6n\">10.1103/v24q-sl6n</a>."},"doi":"10.1103/v24q-sl6n","language":[{"iso":"eng"}],"article_number":"033152","intvolume":"         7","article_type":"original","date_updated":"2025-12-18T16:05:45Z","publication_status":"published","author":[{"id":"88242","first_name":"Laura Maria","last_name":"Serino","full_name":"Serino, Laura Maria"},{"full_name":"Chesi, Giovanni","first_name":"Giovanni","last_name":"Chesi"},{"first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","full_name":"Brecht, Benjamin","id":"27150"},{"full_name":"Maccone, Lorenzo","last_name":"Maccone","first_name":"Lorenzo"},{"first_name":"Chiara","last_name":"Macchiavello","full_name":"Macchiavello, Chiara"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["2643-1564"]},"year":"2025","title":"Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations","department":[{"_id":"15"},{"_id":"623"}],"type":"journal_article","date_created":"2025-12-18T16:04:45Z","abstract":[{"text":"<jats:p>Quantum uncertainty relations impose fundamental limits on the joint knowledge that can be acquired from complementary observables: Perfect knowledge of a quantum state in one basis implies maximal indetermination in all other mutually unbiased bases (MUBs). Uncertainty relations derived from joint properties of the MUBs are generally assumed to be uniform, irrespective of the specific observables chosen within a set. In this work, we demonstrate instead that the uncertainty relations can depend on the choice of observables. Through both experimental observation and numerical methods, we show that selecting different sets of three MUBs in a five-dimensional quantum system results in distinct uncertainty bounds, i.e., in varying degrees of complementarity, in terms of both entropy and variance.</jats:p>","lang":"eng"}],"publication":"Physical Review Research","issue":"3"},{"issue":"2","publication":"Physical Review A","abstract":[{"text":"<jats:p>We study a possibility of measuring the time-resolved second-order autocorrelation function of one of two beams generated in type-II parametric down-conversion by means of temporal magnification of this beam, bringing its correlation time from the picosecond to the nanosecond scale, which can be resolved by modern photodetectors. We show that such a measurement enables one to infer directly the degree of global coherence of that beam, which is linked by a simple relation to the number of modes characterizing the entanglement between the two generated beams. We illustrate the proposed method by an example of photon pairs generated in a periodically poled potassium titanyl phosphate (KTP) crystal with a symmetric group velocity matching for various durations of the pump pulse, resulting in different numbers of modes. Our theoretical model also shows that the magnified double-heralded autocorrelation function of one beam exhibits a local maximum around zero delay time, corresponding to photon bunching at a short time scale.</jats:p>","lang":"eng"}],"date_created":"2025-12-18T16:06:13Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"}],"title":"Time-resolved second-order autocorrelation function of parametric down-conversion","year":"2025","author":[{"full_name":"Horoshko, Dmitri B.","first_name":"Dmitri B.","last_name":"Horoshko"},{"last_name":"Srivastava","first_name":"Shivang","full_name":"Srivastava, Shivang"},{"last_name":"Sośnicki","first_name":"Filip","full_name":"Sośnicki, Filip"},{"full_name":"Mikołajczyk, Michał","first_name":"Michał","last_name":"Mikołajczyk"},{"full_name":"Karpiński, Michał","last_name":"Karpiński","first_name":"Michał"},{"id":"27150","full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht"},{"full_name":"Kolobov, Mikhail I.","last_name":"Kolobov","first_name":"Mikhail I."}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"date_updated":"2025-12-18T16:06:34Z","publication_status":"published","intvolume":"       112","article_number":"023703","language":[{"iso":"eng"}],"doi":"10.1103/7ckm-tm3r","citation":{"ama":"Horoshko DB, Srivastava S, Sośnicki F, et al. Time-resolved second-order autocorrelation function of parametric down-conversion. <i>Physical Review A</i>. 2025;112(2). doi:<a href=\"https://doi.org/10.1103/7ckm-tm3r\">10.1103/7ckm-tm3r</a>","bibtex":"@article{Horoshko_Srivastava_Sośnicki_Mikołajczyk_Karpiński_Brecht_Kolobov_2025, title={Time-resolved second-order autocorrelation function of parametric down-conversion}, volume={112}, DOI={<a href=\"https://doi.org/10.1103/7ckm-tm3r\">10.1103/7ckm-tm3r</a>}, number={2023703}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Horoshko, Dmitri B. and Srivastava, Shivang and Sośnicki, Filip and Mikołajczyk, Michał and Karpiński, Michał and Brecht, Benjamin and Kolobov, Mikhail I.}, year={2025} }","mla":"Horoshko, Dmitri B., et al. “Time-Resolved Second-Order Autocorrelation Function of Parametric down-Conversion.” <i>Physical Review A</i>, vol. 112, no. 2, 023703, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/7ckm-tm3r\">10.1103/7ckm-tm3r</a>.","chicago":"Horoshko, Dmitri B., Shivang Srivastava, Filip Sośnicki, Michał Mikołajczyk, Michał Karpiński, Benjamin Brecht, and Mikhail I. Kolobov. “Time-Resolved Second-Order Autocorrelation Function of Parametric down-Conversion.” <i>Physical Review A</i> 112, no. 2 (2025). <a href=\"https://doi.org/10.1103/7ckm-tm3r\">https://doi.org/10.1103/7ckm-tm3r</a>.","short":"D.B. Horoshko, S. Srivastava, F. Sośnicki, M. Mikołajczyk, M. Karpiński, B. Brecht, M.I. Kolobov, Physical Review A 112 (2025).","apa":"Horoshko, D. B., Srivastava, S., Sośnicki, F., Mikołajczyk, M., Karpiński, M., Brecht, B., &#38; Kolobov, M. I. (2025). Time-resolved second-order autocorrelation function of parametric down-conversion. <i>Physical Review A</i>, <i>112</i>(2), Article 023703. <a href=\"https://doi.org/10.1103/7ckm-tm3r\">https://doi.org/10.1103/7ckm-tm3r</a>","ieee":"D. B. Horoshko <i>et al.</i>, “Time-resolved second-order autocorrelation function of parametric down-conversion,” <i>Physical Review A</i>, vol. 112, no. 2, Art. no. 023703, 2025, doi: <a href=\"https://doi.org/10.1103/7ckm-tm3r\">10.1103/7ckm-tm3r</a>."},"status":"public","_id":"63214","publisher":"American Physical Society (APS)","user_id":"27150","volume":112},{"status":"public","user_id":"27150","volume":10,"_id":"63215","publisher":"IOP Publishing","citation":{"ama":"Serino LM, Rambach M, Brecht B, Romero J, Silberhorn C. Self-guided tomography of time-frequency qudits. <i>Quantum Science and Technology</i>. 2025;10(2). doi:<a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>","bibtex":"@article{Serino_Rambach_Brecht_Romero_Silberhorn_2025, title={Self-guided tomography of time-frequency qudits}, volume={10}, DOI={<a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>}, number={2025024}, journal={Quantum Science and Technology}, publisher={IOP Publishing}, author={Serino, Laura Maria and Rambach, Markus and Brecht, Benjamin and Romero, Jacquiline and Silberhorn, Christine}, year={2025} }","mla":"Serino, Laura Maria, et al. “Self-Guided Tomography of Time-Frequency Qudits.” <i>Quantum Science and Technology</i>, vol. 10, no. 2, 025024, IOP Publishing, 2025, doi:<a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>.","short":"L.M. Serino, M. Rambach, B. Brecht, J. Romero, C. Silberhorn, Quantum Science and Technology 10 (2025).","chicago":"Serino, Laura Maria, Markus Rambach, Benjamin Brecht, Jacquiline Romero, and Christine Silberhorn. “Self-Guided Tomography of Time-Frequency Qudits.” <i>Quantum Science and Technology</i> 10, no. 2 (2025). <a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">https://doi.org/10.1088/2058-9565/adb0ea</a>.","apa":"Serino, L. M., Rambach, M., Brecht, B., Romero, J., &#38; Silberhorn, C. (2025). Self-guided tomography of time-frequency qudits. <i>Quantum Science and Technology</i>, <i>10</i>(2), Article 025024. <a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">https://doi.org/10.1088/2058-9565/adb0ea</a>","ieee":"L. M. Serino, M. Rambach, B. Brecht, J. Romero, and C. Silberhorn, “Self-guided tomography of time-frequency qudits,” <i>Quantum Science and Technology</i>, vol. 10, no. 2, Art. no. 025024, 2025, doi: <a href=\"https://doi.org/10.1088/2058-9565/adb0ea\">10.1088/2058-9565/adb0ea</a>."},"date_updated":"2025-12-18T16:07:35Z","publication_status":"published","intvolume":"        10","year":"2025","title":"Self-guided tomography of time-frequency qudits","author":[{"id":"88242","last_name":"Serino","first_name":"Laura Maria","full_name":"Serino, Laura Maria"},{"first_name":"Markus","last_name":"Rambach","full_name":"Rambach, Markus"},{"full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht","id":"27150"},{"full_name":"Romero, Jacquiline","last_name":"Romero","first_name":"Jacquiline"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"}],"publication_identifier":{"issn":["2058-9565"]},"doi":"10.1088/2058-9565/adb0ea","article_number":"025024","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"<jats:title>Abstract</jats:title>\r\n               <jats:p>High-dimensional time-frequency encodings have the potential to significantly advance quantum information science; however, practical applications require precise knowledge of the encoded quantum states, which becomes increasingly challenging for larger Hilbert spaces. Self-guided tomography (SGT) has emerged as a practical and scalable technique for this purpose in the spatial domain. Here, we apply SGT to estimate time-frequency states using a multi-output quantum pulse gate. We achieve fidelities of more than 99% for 3- and 5-dimensional states without the need for calibration or post-processing. We demonstrate the robustness of SGT against statistical and environmental noise, highlighting its efficacy in the photon-starved regime typical of quantum information applications.</jats:p>"}],"publication":"Quantum Science and Technology","issue":"2","type":"journal_article","department":[{"_id":"15"},{"_id":"623"}],"date_created":"2025-12-18T16:07:11Z"},{"citation":{"short":"S. Babel, L. Bollmers, F. Roeder, W. Ridder, C. Golla, R. Köthemann, B. Reineke, H. Herrmann, B. Brecht, C. Eigner, L. Padberg, C. Silberhorn, Optics Express 33 (2025).","chicago":"Babel, Silia, Laura Bollmers, Franz Roeder, Werner Ridder, Christian Golla, Ronja Köthemann, Bernhard Reineke, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i> 33, no. 25 (2025). <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>.","apa":"Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R., Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., &#38; Silberhorn, C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>, <i>33</i>(25), Article 52729. <a href=\"https://doi.org/10.1364/oe.571605\">https://doi.org/10.1364/oe.571605</a>","ieee":"S. Babel <i>et al.</i>, “Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths,” <i>Optics Express</i>, vol. 33, no. 25, Art. no. 52729, 2025, doi: <a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>.","ama":"Babel S, Bollmers L, Roeder F, et al. Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. <i>Optics Express</i>. 2025;33(25). doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>","bibtex":"@article{Babel_Bollmers_Roeder_Ridder_Golla_Köthemann_Reineke_Herrmann_Brecht_Eigner_et al._2025, title={Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths}, volume={33}, DOI={<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>}, number={2552729}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel, Silia and Bollmers, Laura and Roeder, Franz and Ridder, Werner and Golla, Christian and Köthemann, Ronja and Reineke, Bernhard and Herrmann, Harald and Brecht, Benjamin and Eigner, Christof and et al.}, year={2025} }","mla":"Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” <i>Optics Express</i>, vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/oe.571605\">10.1364/oe.571605</a>."},"oa":"1","status":"public","user_id":"63231","volume":33,"publisher":"Optica Publishing Group","_id":"63091","abstract":[{"text":"We present the design and characterization of a guided-wave, bright, and highly frequency non-degenerate parametric down-conversion (PDC) source in thin-film lithium niobate. The source generates photon pairs with wavelengths of 815 nm and 1550 nm, linking the visible wavelength regime with telecommunication wavelengths. We confirm the high quality of the generated single photons by determining a value for the heralded second-order correlation function as low as g_h^(2)=(6.7+/-1.1)*10^8-3). Furthermore, we achieve a high spectral brightness of 0.44·10pairs/(smWGHz) which is two orders of magnitude higher than sources based on weakly guiding waveguides. The shape of the PDC spectrum and the strong agreement between the effective and nominal bandwidth highlight our high fabrication quality of periodically poled waveguides. The good agreement between the measured and simulated spectral characteristics of our source demonstrates our excellent understanding of the PDC process. Our result is a valuable step towards practical and scalable quantum communication networks as well as photonic quantum computing.","lang":"eng"}],"publication":"Optics Express","issue":"25","type":"journal_article","department":[{"_id":"288"},{"_id":"623"}],"date_created":"2025-12-15T07:20:36Z","publication_status":"published","date_updated":"2026-01-07T11:28:35Z","article_type":"original","intvolume":"        33","year":"2025","title":"Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths","publication_identifier":{"issn":["1094-4087"]},"author":[{"orcid":"https://orcid.org/0000-0002-1568-2580","first_name":"Silia","last_name":"Babel","full_name":"Babel, Silia","id":"63231"},{"last_name":"Bollmers","first_name":"Laura","full_name":"Bollmers, Laura","id":"61375"},{"full_name":"Roeder, Franz","last_name":"Roeder","first_name":"Franz","id":"88149"},{"full_name":"Ridder, Werner","last_name":"Ridder","first_name":"Werner","id":"63574"},{"full_name":"Golla, Christian","last_name":"Golla","first_name":"Christian","id":"40420"},{"full_name":"Köthemann, Ronja","first_name":"Ronja","last_name":"Köthemann"},{"full_name":"Reineke, Bernhard","last_name":"Reineke","first_name":"Bernhard","id":"29821"},{"id":"216","full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald"},{"id":"27150","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","full_name":"Brecht, Benjamin"},{"full_name":"Eigner, Christof","last_name":"Eigner","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244"},{"last_name":"Padberg","first_name":"Laura","full_name":"Padberg, Laura","id":"40300"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"}],"doi":"10.1364/oe.571605","article_number":"52729","main_file_link":[{"open_access":"1","url":"https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729"}],"language":[{"iso":"eng"}]},{"department":[{"_id":"15"},{"_id":"288"},{"_id":"623"}],"type":"journal_article","date_created":"2025-12-01T08:45:07Z","abstract":[{"lang":"eng","text":"Periodically poled thin-film lithium niobate (TFLN) crystals are the fundamental building block for highly-efficient quantum light sources and frequency converters. The efficiency of these devices is strongly dependent on the interaction length between the light and the nonlinear material, scaling quadratically with this parameter. Nevertheless, the fabrication of long, continuously poled areas in TFLN remains challenging, the length of continuously poled areas rarely exceeds 10 mm. In this work, we demonstrate a significant progress in this field achieving the periodic poling of continuous poled areas of 70 mm length with a 3 μm poling period and a close to 50 % duty cycle. We compare two poling electrode design approaches to fabricate long, continuous poled areas. The first approach involves the poling of a single, continuous 70 mm long electrode. The second utilize a segmented approach including the poling of more than 20 individual sections forming together a 70 mm long poling area with no stitching errors. While the continuous electrode allows for faster fabrication, the segmented approach allows to individually optimize the poling resulting in less duty cycle variation. A detailed analysis of the periodic poling results reveals that the results of both are consistent with previously reported poling outcomes for shorter devices. Thus, we demonstrate wafer-scale periodic poling exceeding chiplet-size without any loss in the periodic poling quality. Our work presents a key step towards highly-efficient, narrow-bandwidth and low-pump power nonlinear optical devices."}],"publication":"Nanophotonics","doi":"10.1515/nanoph-2025-0461","language":[{"iso":"eng"}],"main_file_link":[{"open_access":"1","url":"https://doi.org/10.1515/nanoph-2025-0461"}],"article_type":"original","intvolume":"        14","publication_status":"published","date_updated":"2026-01-07T12:06:29Z","author":[{"id":"61375","first_name":"Laura","last_name":"Bollmers","full_name":"Bollmers, Laura"},{"full_name":"Spiegelberg, Noah","last_name":"Spiegelberg","first_name":"Noah"},{"id":"22501","full_name":"Rüsing, Michael","first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577"},{"id":"13244","full_name":"Eigner, Christof","first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083"},{"full_name":"Padberg, Laura","first_name":"Laura","last_name":"Padberg","id":"40300"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"}],"publication_identifier":{"issn":["2192-8606","2192-8614"]},"title":"Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate","year":"2025","oa":"1","quality_controlled":"1","citation":{"ieee":"L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, and C. Silberhorn, “Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate,” <i>Nanophotonics</i>, vol. 14, p. 4761, 2025, doi: <a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>.","apa":"Bollmers, L., Spiegelberg, N., Rüsing, M., Eigner, C., Padberg, L., &#38; Silberhorn, C. (2025). Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate. <i>Nanophotonics</i>, <i>14</i>, 4761. <a href=\"https://doi.org/10.1515/nanoph-2025-0461\">https://doi.org/10.1515/nanoph-2025-0461</a>","short":"L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, C. Silberhorn, Nanophotonics 14 (2025) 4761.","chicago":"Bollmers, Laura, Noah Spiegelberg, Michael Rüsing, Christof Eigner, Laura Padberg, and Christine Silberhorn. “Segmented Finger Electrodes to Optimize Ultra-Long Continuous Wafer-Scale Periodic Poling in Thin-Film Lithium Niobate.” <i>Nanophotonics</i> 14 (2025): 4761. <a href=\"https://doi.org/10.1515/nanoph-2025-0461\">https://doi.org/10.1515/nanoph-2025-0461</a>.","mla":"Bollmers, Laura, et al. “Segmented Finger Electrodes to Optimize Ultra-Long Continuous Wafer-Scale Periodic Poling in Thin-Film Lithium Niobate.” <i>Nanophotonics</i>, vol. 14, Walter de Gruyter GmbH, 2025, p. 4761, doi:<a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>.","bibtex":"@article{Bollmers_Spiegelberg_Rüsing_Eigner_Padberg_Silberhorn_2025, title={Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate}, volume={14}, DOI={<a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>}, journal={Nanophotonics}, publisher={Walter de Gruyter GmbH}, author={Bollmers, Laura and Spiegelberg, Noah and Rüsing, Michael and Eigner, Christof and Padberg, Laura and Silberhorn, Christine}, year={2025}, pages={4761} }","ama":"Bollmers L, Spiegelberg N, Rüsing M, Eigner C, Padberg L, Silberhorn C. Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate. <i>Nanophotonics</i>. 2025;14:4761. doi:<a href=\"https://doi.org/10.1515/nanoph-2025-0461\">10.1515/nanoph-2025-0461</a>"},"volume":14,"user_id":"22501","publisher":"Walter de Gruyter GmbH","_id":"62713","page":"4761","status":"public"},{"publication_date":"2025/04/^0","user_id":"112030","_id":"63051","date_updated":"2026-01-08T13:23:44Z","ipn":"US20250116889A1","year":"2025","status":"public","title":"Optical modulator and electronic apparatus including the same","author":[{"id":"112030","first_name":"Nicholas Alexander","orcid":"0000-0002-4816-0666","last_name":"Güsken","full_name":"Güsken, Nicholas Alexander"}],"type":"patent","department":[{"_id":"623"},{"_id":"15"},{"_id":"230"}],"date_created":"2025-12-11T20:45:34Z","ipc":"US20250116889A1","citation":{"mla":"Güsken, Nicholas Alexander. <i>Optical Modulator and Electronic Apparatus Including the Same</i>. 2025.","ama":"Güsken NA. Optical modulator and electronic apparatus including the same. Published online 2025.","bibtex":"@article{Güsken_2025, title={Optical modulator and electronic apparatus including the same}, author={Güsken, Nicholas Alexander}, year={2025} }","apa":"Güsken, N. A. (2025). <i>Optical modulator and electronic apparatus including the same</i>.","ieee":"N. A. Güsken, “Optical modulator and electronic apparatus including the same.” 2025.","chicago":"Güsken, Nicholas Alexander. “Optical Modulator and Electronic Apparatus Including the Same,” 2025.","short":"N.A. Güsken, (2025)."}},{"author":[{"last_name":"Bianchi","first_name":"Luca","full_name":"Bianchi, Luca"},{"last_name":"Marconi","first_name":"Carlo","full_name":"Marconi, Carlo"},{"full_name":"Ares, Laura","first_name":"Laura","last_name":"Ares"},{"last_name":"Bacco","first_name":"Davide","full_name":"Bacco, Davide"},{"full_name":"Sperling, Jan","first_name":"Jan","orcid":"0000-0002-5844-3205","last_name":"Sperling","id":"75127"}],"publication_identifier":{"issn":["2643-1564"]},"year":"2025","title":"Unified boson sampling","intvolume":"         7","publication_status":"published","date_updated":"2026-01-09T08:03:38Z","language":[{"iso":"eng"}],"article_number":"L042068","doi":"10.1103/8hy1-m5gg","issue":"4","publication":"Physical Review Research","abstract":[{"text":"<jats:p>Boson sampling is a key candidate for demonstrating quantum advantage and has already yielded significant advances in quantum simulation, machine learning, and graph theory. In this work, a unification and extension of distinct forms of boson sampling is developed. The devised protocol merges discrete-variable scattershot boson sampling with continuous-variable Gaussian boson sampling. Therefore, it is rendered possible to harness the complexity of more interesting states, such as squeezed photons, in advanced sampling protocols. A generating function formalism is developed for the joint description of multiphoton and multimode light undergoing Gaussian transformations. The resulting analytical tools enable one to explore interfaces of different photonic quantum-information-processing platforms. A numerical simulation of unified sampling is carried out, benchmarking its performance, complexity, and scalability. Entanglement is characterized to exemplify the generation of quantum correlations from the nonlinear interactions of a unified sampler.</jats:p>","lang":"eng"}],"date_created":"2026-01-09T08:02:57Z","department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"}],"type":"journal_article","status":"public","_id":"63534","publisher":"American Physical Society (APS)","volume":7,"user_id":"75127","citation":{"mla":"Bianchi, Luca, et al. “Unified Boson Sampling.” <i>Physical Review Research</i>, vol. 7, no. 4, L042068, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/8hy1-m5gg\">10.1103/8hy1-m5gg</a>.","bibtex":"@article{Bianchi_Marconi_Ares_Bacco_Sperling_2025, title={Unified boson sampling}, volume={7}, DOI={<a href=\"https://doi.org/10.1103/8hy1-m5gg\">10.1103/8hy1-m5gg</a>}, number={4L042068}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Bianchi, Luca and Marconi, Carlo and Ares, Laura and Bacco, Davide and Sperling, Jan}, year={2025} }","ama":"Bianchi L, Marconi C, Ares L, Bacco D, Sperling J. Unified boson sampling. <i>Physical Review Research</i>. 2025;7(4). doi:<a href=\"https://doi.org/10.1103/8hy1-m5gg\">10.1103/8hy1-m5gg</a>","ieee":"L. Bianchi, C. Marconi, L. Ares, D. Bacco, and J. Sperling, “Unified boson sampling,” <i>Physical Review Research</i>, vol. 7, no. 4, Art. no. L042068, 2025, doi: <a href=\"https://doi.org/10.1103/8hy1-m5gg\">10.1103/8hy1-m5gg</a>.","apa":"Bianchi, L., Marconi, C., Ares, L., Bacco, D., &#38; Sperling, J. (2025). Unified boson sampling. <i>Physical Review Research</i>, <i>7</i>(4), Article L042068. <a href=\"https://doi.org/10.1103/8hy1-m5gg\">https://doi.org/10.1103/8hy1-m5gg</a>","chicago":"Bianchi, Luca, Carlo Marconi, Laura Ares, Davide Bacco, and Jan Sperling. “Unified Boson Sampling.” <i>Physical Review Research</i> 7, no. 4 (2025). <a href=\"https://doi.org/10.1103/8hy1-m5gg\">https://doi.org/10.1103/8hy1-m5gg</a>.","short":"L. Bianchi, C. Marconi, L. Ares, D. Bacco, J. Sperling, Physical Review Research 7 (2025)."}},{"user_id":"16199","volume":2,"publisher":"AIP Publishing","_id":"63562","status":"public","project":[{"name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 - Project Area C","_id":"56"},{"_id":"174","name":"TRR 142 ; TP: C10: Erzeugung und Charakterisierung von Quantenlicht in nichtlinearen Systemen: Eine theoretische Analyse"},{"name":"PhoQC: Photonisches Quantencomputing","_id":"266"}],"citation":{"chicago":"Kopylov, Denis, Torsten Meier, and Polina R. Sharapova. “Bipartite Entanglement Extracted from Multimode Squeezed Light Generated in Lossy Waveguides.” <i>APL Quantum</i> 2, no. 4 (2025). <a href=\"https://doi.org/10.1063/5.0293116\">https://doi.org/10.1063/5.0293116</a>.","short":"D. Kopylov, T. Meier, P.R. Sharapova, APL Quantum 2 (2025).","ieee":"D. Kopylov, T. Meier, and P. R. Sharapova, “Bipartite entanglement extracted from multimode squeezed light generated in lossy waveguides,” <i>APL Quantum</i>, vol. 2, no. 4, Art. no. 046116, 2025, doi: <a href=\"https://doi.org/10.1063/5.0293116\">10.1063/5.0293116</a>.","apa":"Kopylov, D., Meier, T., &#38; Sharapova, P. R. (2025). Bipartite entanglement extracted from multimode squeezed light generated in lossy waveguides. <i>APL Quantum</i>, <i>2</i>(4), Article 046116. <a href=\"https://doi.org/10.1063/5.0293116\">https://doi.org/10.1063/5.0293116</a>","bibtex":"@article{Kopylov_Meier_Sharapova_2025, title={Bipartite entanglement extracted from multimode squeezed light generated in lossy waveguides}, volume={2}, DOI={<a href=\"https://doi.org/10.1063/5.0293116\">10.1063/5.0293116</a>}, number={4046116}, journal={APL Quantum}, publisher={AIP Publishing}, author={Kopylov, Denis and Meier, Torsten and Sharapova, Polina R.}, year={2025} }","ama":"Kopylov D, Meier T, Sharapova PR. Bipartite entanglement extracted from multimode squeezed light generated in lossy waveguides. <i>APL Quantum</i>. 2025;2(4). doi:<a href=\"https://doi.org/10.1063/5.0293116\">10.1063/5.0293116</a>","mla":"Kopylov, Denis, et al. “Bipartite Entanglement Extracted from Multimode Squeezed Light Generated in Lossy Waveguides.” <i>APL Quantum</i>, vol. 2, no. 4, 046116, AIP Publishing, 2025, doi:<a href=\"https://doi.org/10.1063/5.0293116\">10.1063/5.0293116</a>."},"doi":"10.1063/5.0293116","article_number":"046116","language":[{"iso":"eng"}],"publication_status":"published","date_updated":"2026-01-12T13:23:36Z","intvolume":"         2","title":"Bipartite entanglement extracted from multimode squeezed light generated in lossy waveguides","year":"2025","author":[{"id":"98502","full_name":"Kopylov, Denis","last_name":"Kopylov","first_name":"Denis"},{"id":"344","full_name":"Meier, Torsten","first_name":"Torsten","last_name":"Meier","orcid":"0000-0001-8864-2072"},{"id":"60286","full_name":"Sharapova, Polina R.","first_name":"Polina R.","last_name":"Sharapova"}],"publication_identifier":{"issn":["2835-0103"]},"type":"journal_article","department":[{"_id":"15"},{"_id":"569"},{"_id":"170"},{"_id":"293"},{"_id":"429"},{"_id":"230"},{"_id":"623"},{"_id":"35"}],"date_created":"2026-01-12T13:18:51Z","abstract":[{"text":"<jats:p>Entangled two-mode Gaussian states constitute an important building block for continuous variable quantum computing and communication protocols. In this work, we theoretically study two-mode bipartite states, which are extracted from multimode light generated via type-II parametric downconversion (PDC) in lossy waveguides. For these states, we demonstrate that the squeezing quantifies entanglement and we construct a measurement basis, which results in the maximal bipartite entanglement. We illustrate our findings by numerically solving the spatial master equation for PDC in a Markovian environment. The optimal measurement modes are compared with two widely used broadband bases: the Mercer–Wolf basis (the first-order coherence basis) and the Williamson–Euler basis.</jats:p>","lang":"eng"}],"issue":"4","publication":"APL Quantum"},{"external_id":{"arxiv":["2502.05123"]},"date_created":"2025-02-10T08:26:45Z","type":"preprint","department":[{"_id":"623"},{"_id":"15"},{"_id":"636"}],"oa":"1","citation":{"mla":"Kopylov, Denis, et al. <i>Multiphoton, Multimode State Classification for Nonlinear Optical Circuits </i>.","ama":"Kopylov D, Offen C, Ares L, et al. Multiphoton, multimode state classification for nonlinear optical circuits .","bibtex":"@article{Kopylov_Offen_Ares_Wembe Moafo_Ober-Blöbaum_Meier_Sharapova_Sperling, title={Multiphoton, multimode state classification for nonlinear optical circuits }, author={Kopylov, Denis and Offen, Christian and Ares, Laura and Wembe Moafo, Boris Edgar and Ober-Blöbaum, Sina and Meier, Torsten and Sharapova, Polina and Sperling, Jan} }","apa":"Kopylov, D., Offen, C., Ares, L., Wembe Moafo, B. E., Ober-Blöbaum, S., Meier, T., Sharapova, P., &#38; Sperling, J. (n.d.). <i>Multiphoton, multimode state classification for nonlinear optical circuits </i>.","ieee":"D. Kopylov <i>et al.</i>, “Multiphoton, multimode state classification for nonlinear optical circuits .” .","short":"D. Kopylov, C. Offen, L. Ares, B.E. Wembe Moafo, S. Ober-Blöbaum, T. Meier, P. Sharapova, J. Sperling, (n.d.).","chicago":"Kopylov, Denis, Christian Offen, Laura Ares, Boris Edgar Wembe Moafo, Sina Ober-Blöbaum, Torsten Meier, Polina Sharapova, and Jan Sperling. “Multiphoton, Multimode State Classification for Nonlinear Optical Circuits ,” n.d."},"abstract":[{"lang":"eng","text":"We introduce a new classification of multimode states with a fixed number of photons. This classification is based on the factorizability of homogeneous multivariate polynomials and is invariant under unitary transformations. The classes physically correspond to field excitations in terms of single and multiple photons, each of which being in an arbitrary irreducible superposition of quantized modes. We further show how the transitions between classes are rendered possible by photon addition, photon subtraction, and photon-projection nonlinearities. We explicitly put forward a design for a multilayer interferometer in which the states for different classes can be generated with state-of-the-art experimental techniques. Limitations of the proposed designs are analyzed using the introduced classification, providing a benchmark for the robustness of certain states and classes. "}],"main_file_link":[{"url":"https://doi.org/10.48550/arXiv.2502.05123","open_access":"1"}],"language":[{"iso":"eng"}],"_id":"58544","user_id":"85279","status":"public","year":"2025","title":"Multiphoton, multimode state classification for nonlinear optical circuits ","author":[{"full_name":"Kopylov, Denis","first_name":"Denis","last_name":"Kopylov","id":"98502"},{"first_name":"Christian","orcid":"0000-0002-5940-8057","last_name":"Offen","full_name":"Offen, Christian","id":"85279"},{"full_name":"Ares, Laura","last_name":"Ares","first_name":"Laura"},{"last_name":"Wembe Moafo","first_name":"Boris Edgar","full_name":"Wembe Moafo, Boris Edgar","id":"95394"},{"first_name":"Sina","last_name":"Ober-Blöbaum","full_name":"Ober-Blöbaum, Sina","id":"16494"},{"id":"344","orcid":"0000-0001-8864-2072","last_name":"Meier","first_name":"Torsten","full_name":"Meier, Torsten"},{"first_name":"Polina","last_name":"Sharapova","full_name":"Sharapova, Polina","id":"60286"},{"id":"75127","full_name":"Sperling, Jan","last_name":"Sperling","first_name":"Jan","orcid":"0000-0002-5844-3205"}],"publication_status":"submitted","date_updated":"2025-02-10T08:36:12Z"},{"year":"2025","title":"SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides","publication_identifier":{"issn":["2770-0208"]},"author":[{"full_name":"Kießler, Christian","last_name":"Kießler","first_name":"Christian","id":"44252"},{"id":"69553","full_name":"Kirsch, Michelle","first_name":"Michelle","last_name":"Kirsch"},{"id":"44373","last_name":"Lengeling","first_name":"Sebastian","full_name":"Lengeling, Sebastian"},{"last_name":"Herrmann","first_name":"Harald","full_name":"Herrmann, Harald","id":"216"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"}],"publication_status":"published","date_updated":"2025-03-19T16:03:25Z","article_type":"original","intvolume":"         4","article_number":"593","language":[{"iso":"eng"}],"doi":"10.1364/optcon.557439","issue":"3","publication":"Optics Continuum","abstract":[{"text":"<jats:p>Stable and bright single photon sources are key components for future quantum applications. A simple fabrication method is an important requirement for such sources. Here, we present a single photon source based on diced ridge waveguides in titanium indiffused LiNbO<jats:sub>3</jats:sub>. These waveguides can be easily fabricated by combining planar titanium in-diffusion without lithographic patterning and easy-to-handle precision dicing. Such devices have the potential to generate high single photon rates because ridge structures are typically less prone to the photorefractive effect. We achieve waveguide propagation losses &lt;0.4dBcm and a SHG conversion efficiency of about 81%Wcm<jats:sup>2</jats:sup>. Harnessing a type-0 SPDC process to generate 1550 nm photons, we obtain a SPDC brightness of 3⋅10<jats:sup>5</jats:sup>1s⋅mW⋅nm, with a heralding efficiency of <jats:italic>η</jats:italic><jats:sub>h</jats:sub>=45% (<jats:italic>η</jats:italic><jats:sub>h,wg</jats:sub>=77.5% for the waveguide itself excluded setup losses) and a heralded second-order correlation function of <jats:italic>g</jats:italic><jats:sub>h</jats:sub><jats:sup>2</jats:sup>(0)&lt;0.003 at low pump powers.</jats:p>","lang":"eng"}],"date_created":"2025-03-19T10:56:04Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"status":"public","publisher":"Optica Publishing Group","_id":"59069","user_id":"216","volume":4,"citation":{"chicago":"Kießler, Christian, Michelle Kirsch, Sebastian Lengeling, Harald Herrmann, and Christine Silberhorn. “SPDC Single-Photon Source in Ti-Indiffused Diced Ridge LiNbO<sub>3</sub> Waveguides.” <i>Optics Continuum</i> 4, no. 3 (2025). <a href=\"https://doi.org/10.1364/optcon.557439\">https://doi.org/10.1364/optcon.557439</a>.","short":"C. Kießler, M. Kirsch, S. Lengeling, H. Herrmann, C. Silberhorn, Optics Continuum 4 (2025).","apa":"Kießler, C., Kirsch, M., Lengeling, S., Herrmann, H., &#38; Silberhorn, C. (2025). SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides. <i>Optics Continuum</i>, <i>4</i>(3), Article 593. <a href=\"https://doi.org/10.1364/optcon.557439\">https://doi.org/10.1364/optcon.557439</a>","ieee":"C. Kießler, M. Kirsch, S. Lengeling, H. Herrmann, and C. Silberhorn, “SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides,” <i>Optics Continuum</i>, vol. 4, no. 3, Art. no. 593, 2025, doi: <a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>.","ama":"Kießler C, Kirsch M, Lengeling S, Herrmann H, Silberhorn C. SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides. <i>Optics Continuum</i>. 2025;4(3). doi:<a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>","bibtex":"@article{Kießler_Kirsch_Lengeling_Herrmann_Silberhorn_2025, title={SPDC single-photon source in Ti-indiffused diced ridge LiNbO<sub>3</sub> waveguides}, volume={4}, DOI={<a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>}, number={3593}, journal={Optics Continuum}, publisher={Optica Publishing Group}, author={Kießler, Christian and Kirsch, Michelle and Lengeling, Sebastian and Herrmann, Harald and Silberhorn, Christine}, year={2025} }","mla":"Kießler, Christian, et al. “SPDC Single-Photon Source in Ti-Indiffused Diced Ridge LiNbO<sub>3</sub> Waveguides.” <i>Optics Continuum</i>, vol. 4, no. 3, 593, Optica Publishing Group, 2025, doi:<a href=\"https://doi.org/10.1364/optcon.557439\">10.1364/optcon.557439</a>."}},{"article_number":"064109","language":[{"iso":"eng"}],"doi":"10.1103/physrevb.111.064109","title":"Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films","year":"2025","author":[{"full_name":"Pionteck, Mike N.","first_name":"Mike N.","last_name":"Pionteck"},{"full_name":"Roeper, Matthias","first_name":"Matthias","last_name":"Roeper"},{"full_name":"Koppitz, Boris","last_name":"Koppitz","first_name":"Boris"},{"first_name":"Samuel D.","last_name":"Seddon","full_name":"Seddon, Samuel D."},{"full_name":"Rüsing, Michael","last_name":"Rüsing","first_name":"Michael","orcid":"0000-0003-4682-4577","id":"22501"},{"id":"40300","last_name":"Padberg","first_name":"Laura","full_name":"Padberg, Laura"},{"id":"13244","first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","full_name":"Eigner, Christof"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"first_name":"Simone","last_name":"Sanna","full_name":"Sanna, Simone"},{"full_name":"Eng, Lukas M.","first_name":"Lukas M.","last_name":"Eng"}],"publication_identifier":{"issn":["2469-9950","2469-9969"]},"date_updated":"2025-04-02T16:24:47Z","publication_status":"published","intvolume":"       111","date_created":"2025-04-02T16:21:47Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"issue":"6","publication":"Physical Review B","abstract":[{"text":"Stress plays a crucial role in thin films and layered systems, and thus significantly influences the material's electrical, mechanical and (nonlinear) optical responses. Despite lithium niobate's wide applicability as a nonlinear optical material, the impact of mechanical stress on its nonlinear optical properties is not well characterized. In this work, we systematically study both experimentally and theoretically, the nonlinear optical responses of thin film lithium niobate (TFLN) single crystals. Compressive and tensile stress is applied in our experiment using a piezodriven strain cell. We then record the second-harmonic-generated (SHG) response in back-reflection geometry, and compare these results to theoretical modeling using density functional theory (DFT). Both methods consistently reveal that uniaxial stress induces changes of the nonlinear optical susceptibility of certain tensor elements on the order of up to 1 pm/(V GPa). The exact value depends on the tensor element that is addressed in our SHG analysis, on the crystal orientation, and also whether using compressive or tensile stresses. Furthermore, a lowering of the crystal symmetry when applying stress along the <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\"><a:mi>x</a:mi></a:math> or <b:math xmlns:b=\"http://www.w3.org/1998/Math/MathML\"><b:mi>y</b:mi></b:math> crystallographic axes is observed by the appearance of new nonlinear optical tensor elements within the strained crystals.","lang":"eng"}],"publisher":"American Physical Society (APS)","_id":"59276","user_id":"22501","volume":111,"status":"public","citation":{"bibtex":"@article{Pionteck_Roeper_Koppitz_Seddon_Rüsing_Padberg_Eigner_Silberhorn_Sanna_Eng_2025, title={Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films}, volume={111}, DOI={<a href=\"https://doi.org/10.1103/physrevb.111.064109\">10.1103/physrevb.111.064109</a>}, number={6064109}, journal={Physical Review B}, publisher={American Physical Society (APS)}, author={Pionteck, Mike N. and Roeper, Matthias and Koppitz, Boris and Seddon, Samuel D. and Rüsing, Michael and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Sanna, Simone and Eng, Lukas M.}, year={2025} }","ama":"Pionteck MN, Roeper M, Koppitz B, et al. Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films. <i>Physical Review B</i>. 2025;111(6). doi:<a href=\"https://doi.org/10.1103/physrevb.111.064109\">10.1103/physrevb.111.064109</a>","mla":"Pionteck, Mike N., et al. “Second-Order Nonlinear Piezo-Optic Properties of Single Crystal Lithium Niobate Thin Films.” <i>Physical Review B</i>, vol. 111, no. 6, 064109, American Physical Society (APS), 2025, doi:<a href=\"https://doi.org/10.1103/physrevb.111.064109\">10.1103/physrevb.111.064109</a>.","short":"M.N. Pionteck, M. Roeper, B. Koppitz, S.D. Seddon, M. Rüsing, L. Padberg, C. Eigner, C. Silberhorn, S. Sanna, L.M. Eng, Physical Review B 111 (2025).","chicago":"Pionteck, Mike N., Matthias Roeper, Boris Koppitz, Samuel D. Seddon, Michael Rüsing, Laura Padberg, Christof Eigner, Christine Silberhorn, Simone Sanna, and Lukas M. Eng. “Second-Order Nonlinear Piezo-Optic Properties of Single Crystal Lithium Niobate Thin Films.” <i>Physical Review B</i> 111, no. 6 (2025). <a href=\"https://doi.org/10.1103/physrevb.111.064109\">https://doi.org/10.1103/physrevb.111.064109</a>.","ieee":"M. N. Pionteck <i>et al.</i>, “Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films,” <i>Physical Review B</i>, vol. 111, no. 6, Art. no. 064109, 2025, doi: <a href=\"https://doi.org/10.1103/physrevb.111.064109\">10.1103/physrevb.111.064109</a>.","apa":"Pionteck, M. N., Roeper, M., Koppitz, B., Seddon, S. D., Rüsing, M., Padberg, L., Eigner, C., Silberhorn, C., Sanna, S., &#38; Eng, L. M. (2025). Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films. <i>Physical Review B</i>, <i>111</i>(6), Article 064109. <a href=\"https://doi.org/10.1103/physrevb.111.064109\">https://doi.org/10.1103/physrevb.111.064109</a>"},"quality_controlled":"1"},{"language":[{"iso":"eng"}],"doi":"10.1039/d4nh00546e","publication_identifier":{"issn":["2055-6756","2055-6764"]},"author":[{"full_name":"Devaraj, Vasanthan","last_name":"Devaraj","first_name":"Vasanthan","id":"103814"},{"orcid":"0000-0002-4710-1170","first_name":"Isaac Azahel","last_name":"Ruiz Alvarado","full_name":"Ruiz Alvarado, Isaac Azahel","id":"79462"},{"full_name":"Lee, Jong-Min","first_name":"Jong-Min","last_name":"Lee"},{"first_name":"Jin-Woo","last_name":"Oh","full_name":"Oh, Jin-Woo"},{"id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann","first_name":"Uwe"},{"last_name":"Schmidt","first_name":"Wolf Gero","orcid":"0000-0002-2717-5076","full_name":"Schmidt, Wolf Gero","id":"468"},{"id":"30525","full_name":"Zentgraf, Thomas","first_name":"Thomas","orcid":"0000-0002-8662-1101","last_name":"Zentgraf"}],"year":"2025","title":"Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror","article_type":"original","intvolume":"        10","publication_status":"published","date_updated":"2025-07-09T14:04:39Z","date_created":"2025-02-14T08:13:10Z","department":[{"_id":"15"},{"_id":"230"},{"_id":"289"},{"_id":"623"},{"_id":"35"},{"_id":"295"},{"_id":"170"},{"_id":"429"},{"_id":"27"}],"type":"journal_article","publication":"Nanoscale Horizons","abstract":[{"text":"We present a cost-effective self-assembly method to fabricate low-density dimer NPs in an NPoM architecture, using the M13 phage as a spacer layer. This will enable the development of dynamic plasmonic devices and advanced sensing applications.","lang":"eng"}],"_id":"58642","publisher":"Royal Society of Chemistry (RSC)","page":"537-548","volume":10,"user_id":"16199","status":"public","citation":{"chicago":"Devaraj, Vasanthan, Isaac Azahel Ruiz Alvarado, Jong-Min Lee, Jin-Woo Oh, Uwe Gerstmann, Wolf Gero Schmidt, and Thomas Zentgraf. “Self-Assembly of Isolated Plasmonic Dimers with Sub-5 Nm Gaps on a Metallic Mirror.” <i>Nanoscale Horizons</i> 10 (2025): 537–48. <a href=\"https://doi.org/10.1039/d4nh00546e\">https://doi.org/10.1039/d4nh00546e</a>.","short":"V. Devaraj, I.A. Ruiz Alvarado, J.-M. Lee, J.-W. Oh, U. Gerstmann, W.G. Schmidt, T. Zentgraf, Nanoscale Horizons 10 (2025) 537–548.","ama":"Devaraj V, Ruiz Alvarado IA, Lee J-M, et al. Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror. <i>Nanoscale Horizons</i>. 2025;10:537-548. doi:<a href=\"https://doi.org/10.1039/d4nh00546e\">10.1039/d4nh00546e</a>","bibtex":"@article{Devaraj_Ruiz Alvarado_Lee_Oh_Gerstmann_Schmidt_Zentgraf_2025, title={Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror}, volume={10}, DOI={<a href=\"https://doi.org/10.1039/d4nh00546e\">10.1039/d4nh00546e</a>}, journal={Nanoscale Horizons}, publisher={Royal Society of Chemistry (RSC)}, author={Devaraj, Vasanthan and Ruiz Alvarado, Isaac Azahel and Lee, Jong-Min and Oh, Jin-Woo and Gerstmann, Uwe and Schmidt, Wolf Gero and Zentgraf, Thomas}, year={2025}, pages={537–548} }","mla":"Devaraj, Vasanthan, et al. “Self-Assembly of Isolated Plasmonic Dimers with Sub-5 Nm Gaps on a Metallic Mirror.” <i>Nanoscale Horizons</i>, vol. 10, Royal Society of Chemistry (RSC), 2025, pp. 537–48, doi:<a href=\"https://doi.org/10.1039/d4nh00546e\">10.1039/d4nh00546e</a>.","apa":"Devaraj, V., Ruiz Alvarado, I. A., Lee, J.-M., Oh, J.-W., Gerstmann, U., Schmidt, W. G., &#38; Zentgraf, T. (2025). Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror. <i>Nanoscale Horizons</i>, <i>10</i>, 537–548. <a href=\"https://doi.org/10.1039/d4nh00546e\">https://doi.org/10.1039/d4nh00546e</a>","ieee":"V. Devaraj <i>et al.</i>, “Self-assembly of isolated plasmonic dimers with sub-5 nm gaps on a metallic mirror,” <i>Nanoscale Horizons</i>, vol. 10, pp. 537–548, 2025, doi: <a href=\"https://doi.org/10.1039/d4nh00546e\">10.1039/d4nh00546e</a>."},"project":[{"grant_number":"231447078","_id":"53","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"_id":"168","grant_number":"231447078","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"_id":"55","name":"TRR 142 - B: TRR 142 - Project Area B"},{"name":"Hochleistungsrechner Noctua in Paderborn","grant_number":"367360193","_id":"445"},{"name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing","_id":"52"}],"quality_controlled":"1"},{"type":"conference","department":[{"_id":"15"},{"_id":"623"}],"date_created":"2025-07-11T09:18:09Z","project":[{"call_identifier":"ERC","_id":"239","grant_number":"101042399","name":"QuESADILLA: ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications"},{"name":"PhoQuant--QCTest: PhoQuant: Photonische Quantencomputer -  Quantencomputing Testplattform","_id":"191","grant_number":"13N16103"}],"publication":"Advanced Photon Counting Techniques XIX","citation":{"ieee":"T. Schapeler, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, and T. Bartley, “Optimizing photon-number resolution with superconducting nanowire multi-photon detectors,” in <i>Advanced Photon Counting Techniques XIX</i>, 2025, doi: <a href=\"https://doi.org/10.1117/12.3054905\">10.1117/12.3054905</a>.","apa":"Schapeler, T., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., &#38; Bartley, T. (2025). Optimizing photon-number resolution with superconducting nanowire multi-photon detectors. In M. A. Itzler, K. A. McIntosh, &#38; J. C. Bienfang (Eds.), <i>Advanced Photon Counting Techniques XIX</i>. SPIE. <a href=\"https://doi.org/10.1117/12.3054905\">https://doi.org/10.1117/12.3054905</a>","chicago":"Schapeler, Timon, Fabian Schlue, Michael Stefszky, Benjamin Brecht, Christine Silberhorn, and Tim Bartley. “Optimizing Photon-Number Resolution with Superconducting Nanowire Multi-Photon Detectors.” In <i>Advanced Photon Counting Techniques XIX</i>, edited by Mark A. Itzler, K. Alex McIntosh, and Joshua C. Bienfang. SPIE, 2025. <a href=\"https://doi.org/10.1117/12.3054905\">https://doi.org/10.1117/12.3054905</a>.","short":"T. Schapeler, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley, in: M.A. Itzler, K.A. McIntosh, J.C. Bienfang (Eds.), Advanced Photon Counting Techniques XIX, SPIE, 2025.","mla":"Schapeler, Timon, et al. “Optimizing Photon-Number Resolution with Superconducting Nanowire Multi-Photon Detectors.” <i>Advanced Photon Counting Techniques XIX</i>, edited by Mark A. Itzler et al., SPIE, 2025, doi:<a href=\"https://doi.org/10.1117/12.3054905\">10.1117/12.3054905</a>.","bibtex":"@inproceedings{Schapeler_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2025, title={Optimizing photon-number resolution with superconducting nanowire multi-photon detectors}, DOI={<a href=\"https://doi.org/10.1117/12.3054905\">10.1117/12.3054905</a>}, booktitle={Advanced Photon Counting Techniques XIX}, publisher={SPIE}, author={Schapeler, Timon and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Bartley, Tim}, editor={Itzler, Mark A. and McIntosh, K. Alex and Bienfang, Joshua C.}, year={2025} }","ama":"Schapeler T, Schlue F, Stefszky M, Brecht B, Silberhorn C, Bartley T. Optimizing photon-number resolution with superconducting nanowire multi-photon detectors. In: Itzler MA, McIntosh KA, Bienfang JC, eds. <i>Advanced Photon Counting Techniques XIX</i>. SPIE; 2025. doi:<a href=\"https://doi.org/10.1117/12.3054905\">10.1117/12.3054905</a>"},"doi":"10.1117/12.3054905","user_id":"55629","editor":[{"last_name":"Itzler","first_name":"Mark A.","full_name":"Itzler, Mark A."},{"last_name":"McIntosh","first_name":"K. Alex","full_name":"McIntosh, K. Alex"},{"full_name":"Bienfang, Joshua C.","last_name":"Bienfang","first_name":"Joshua C."}],"publisher":"SPIE","_id":"60587","language":[{"iso":"eng"}],"date_updated":"2025-07-11T09:22:11Z","publication_status":"published","year":"2025","status":"public","title":"Optimizing photon-number resolution with superconducting nanowire multi-photon detectors","author":[{"id":"55629","last_name":"Schapeler","first_name":"Timon","orcid":"0000-0001-7652-1716","full_name":"Schapeler, Timon"},{"full_name":"Schlue, Fabian","last_name":"Schlue","first_name":"Fabian","id":"63579"},{"id":"42777","full_name":"Stefszky, Michael","last_name":"Stefszky","first_name":"Michael"},{"id":"27150","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"},{"full_name":"Bartley, Tim","last_name":"Bartley","first_name":"Tim","id":"49683"}]}]