[{"publisher":"Optica Publishing Group","_id":"56267","language":[{"iso":"eng"}],"doi":"10.1364/opticaq.532334","user_id":"63574","status":"public","year":"2024","title":"Orchestrating time and color: a programmable source of high-dimensional entanglement","publication_identifier":{"issn":["2837-6714"]},"author":[{"full_name":"Serino, Laura","first_name":"Laura","last_name":"Serino","id":"88242"},{"full_name":"Ridder, Werner","first_name":"Werner","last_name":"Ridder","id":"63574"},{"id":"95902","last_name":"Bhattacharjee","first_name":"Abhinandan","full_name":"Bhattacharjee, Abhinandan"},{"id":"51223","last_name":"Gil López","first_name":"Jano","full_name":"Gil López, Jano"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"}],"date_updated":"2025-12-01T08:49:46Z","publication_status":"published","date_created":"2024-09-27T11:46:59Z","type":"journal_article","department":[{"_id":"288"},{"_id":"623"},{"_id":"288"}],"publication":"Optica Quantum","citation":{"mla":"Serino, Laura, et al. “Orchestrating Time and Color: A Programmable Source of High-Dimensional Entanglement.” Optica Quantum, Optica Publishing Group, 2024, doi:10.1364/opticaq.532334.","bibtex":"@article{Serino_Ridder_Bhattacharjee_Gil López_Brecht_Silberhorn_2024, title={Orchestrating time and color: a programmable source of high-dimensional entanglement}, DOI={10.1364/opticaq.532334}, journal={Optica Quantum}, publisher={Optica Publishing Group}, author={Serino, Laura and Ridder, Werner and Bhattacharjee, Abhinandan and Gil López, Jano and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }","ama":"Serino L, Ridder W, Bhattacharjee A, Gil López J, Brecht B, Silberhorn C. Orchestrating time and color: a programmable source of high-dimensional entanglement. Optica Quantum. Published online 2024. doi:10.1364/opticaq.532334","ieee":"L. Serino, W. Ridder, A. Bhattacharjee, J. Gil López, B. Brecht, and C. Silberhorn, “Orchestrating time and color: a programmable source of high-dimensional entanglement,” Optica Quantum, 2024, doi: 10.1364/opticaq.532334.","apa":"Serino, L., Ridder, W., Bhattacharjee, A., Gil López, J., Brecht, B., & Silberhorn, C. (2024). Orchestrating time and color: a programmable source of high-dimensional entanglement. Optica Quantum. https://doi.org/10.1364/opticaq.532334","chicago":"Serino, Laura, Werner Ridder, Abhinandan Bhattacharjee, Jano Gil López, Benjamin Brecht, and Christine Silberhorn. “Orchestrating Time and Color: A Programmable Source of High-Dimensional Entanglement.” Optica Quantum, 2024. https://doi.org/10.1364/opticaq.532334.","short":"L. Serino, W. Ridder, A. Bhattacharjee, J. Gil López, B. Brecht, C. Silberhorn, Optica Quantum (2024)."},"project":[{"name":"QuICHE: Quanteninformation und Quantenkommunikation mit hochdimensionaler Informationskodierung (QuICHE)","_id":"211"}]},{"citation":{"chicago":"Thiele, Frederik, Thomas Hummel, Nina Amelie Lange, Felix Dreher, Maximilian Protte, Felix vom Bruch, Sebastian Lengeling, et al. “Pyroelectric Influence on Lithium Niobate during the Thermal Transition for Cryogenic Integrated Photonics.” Materials for Quantum Technology 4, no. 1 (2024). https://doi.org/10.1088/2633-4356/ad207d.","short":"F. Thiele, T. Hummel, N.A. Lange, F. Dreher, M. Protte, F. vom Bruch, S. Lengeling, H. Herrmann, C. Eigner, C. Silberhorn, T. Bartley, Materials for Quantum Technology 4 (2024).","apa":"Thiele, F., Hummel, T., Lange, N. A., Dreher, F., Protte, M., Bruch, F. vom, Lengeling, S., Herrmann, H., Eigner, C., Silberhorn, C., & Bartley, T. (2024). Pyroelectric influence on lithium niobate during the thermal transition for cryogenic integrated photonics. Materials for Quantum Technology, 4(1), Article 015402. https://doi.org/10.1088/2633-4356/ad207d","ieee":"F. Thiele et al., “Pyroelectric influence on lithium niobate during the thermal transition for cryogenic integrated photonics,” Materials for Quantum Technology, vol. 4, no. 1, Art. no. 015402, 2024, doi: 10.1088/2633-4356/ad207d.","ama":"Thiele F, Hummel T, Lange NA, et al. Pyroelectric influence on lithium niobate during the thermal transition for cryogenic integrated photonics. Materials for Quantum Technology. 2024;4(1). doi:10.1088/2633-4356/ad207d","bibtex":"@article{Thiele_Hummel_Lange_Dreher_Protte_Bruch_Lengeling_Herrmann_Eigner_Silberhorn_et al._2024, title={Pyroelectric influence on lithium niobate during the thermal transition for cryogenic integrated photonics}, volume={4}, DOI={10.1088/2633-4356/ad207d}, number={1015402}, journal={Materials for Quantum Technology}, publisher={IOP Publishing}, author={Thiele, Frederik and Hummel, Thomas and Lange, Nina Amelie and Dreher, Felix and Protte, Maximilian and Bruch, Felix vom and Lengeling, Sebastian and Herrmann, Harald and Eigner, Christof and Silberhorn, Christine and et al.}, year={2024} }","mla":"Thiele, Frederik, et al. “Pyroelectric Influence on Lithium Niobate during the Thermal Transition for Cryogenic Integrated Photonics.” Materials for Quantum Technology, vol. 4, no. 1, 015402, IOP Publishing, 2024, doi:10.1088/2633-4356/ad207d."},"project":[{"name":"TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher Filterung unter Verwendung integrierter supraleitender Detektoren","_id":"171"}],"status":"public","_id":"51356","publisher":"IOP Publishing","user_id":"56843","volume":4,"publication":"Materials for Quantum Technology","issue":"1","abstract":[{"lang":"eng","text":"Abstract\r\n Lithium niobate has emerged as a promising platform for integrated quantum optics, enabling efficient generation, manipulation, and detection of quantum states of light. However, integrating single-photon detectors requires cryogenic operating temperatures, since the best performing detectors are based on narrow superconducting wires. While previous studies have demonstrated the operation of quantum light sources and electro-optic modulators in LiNbO3 at cryogenic temperatures, the thermal transition between room temperature and cryogenic conditions introduces additional effects that can significantly influence device performance. In this paper, we investigate the generation of pyroelectric charges and their impact on the optical properties of lithium niobate waveguides when changing from room temperature to 25 K, and vice versa. We measure the generated pyroelectric charge flow and correlate this with fast changes in the birefringence acquired through the Sénarmont-method. Both electrical and optical influence of the pyroelectric effect occur predominantly at temperatures above 100 K."}],"date_created":"2024-02-16T07:56:44Z","keyword":["General Earth and Planetary Sciences","General Environmental Science"],"type":"journal_article","title":"Pyroelectric influence on lithium niobate during the thermal transition for cryogenic integrated photonics","year":"2024","author":[{"id":"50819","full_name":"Thiele, Frederik","orcid":"0000-0003-0663-5587","last_name":"Thiele","first_name":"Frederik"},{"full_name":"Hummel, Thomas","orcid":"0000-0001-8627-2119","last_name":"Hummel","first_name":"Thomas","id":"83846"},{"id":"56843","orcid":"0000-0001-6624-7098","first_name":"Nina Amelie","last_name":"Lange","full_name":"Lange, Nina Amelie"},{"full_name":"Dreher, Felix","first_name":"Felix","last_name":"Dreher"},{"first_name":"Maximilian","last_name":"Protte","full_name":"Protte, Maximilian"},{"full_name":"Bruch, Felix vom","first_name":"Felix vom","last_name":"Bruch"},{"first_name":"Sebastian","last_name":"Lengeling","full_name":"Lengeling, Sebastian","id":"44373"},{"id":"216","first_name":"Harald","last_name":"Herrmann","full_name":"Herrmann, Harald"},{"full_name":"Eigner, Christof","last_name":"Eigner","first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"last_name":"Bartley","first_name":"Tim","full_name":"Bartley, Tim","id":"49683"}],"publication_identifier":{"issn":["2633-4356"]},"publication_status":"published","date_updated":"2025-12-15T09:23:02Z","intvolume":" 4","article_number":"015402","language":[{"iso":"eng"}],"doi":"10.1088/2633-4356/ad207d"},{"publisher":"American Physical Society (APS)","_id":"63219","user_id":"27150","volume":110,"status":"public","citation":{"bibtex":"@article{Teo_Shringarpure_Jeong_Prasannan_Brecht_Silberhorn_Evans_Mogilevtsev_Sánchez-Soto_2024, title={Relative-belief inference in quantum information theory}, volume={110}, DOI={10.1103/physreva.110.012231}, number={1012231}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Teo, Y. S. and Shringarpure, S. U. and Jeong, H. and Prasannan, Nidhin and Brecht, Benjamin and Silberhorn, Christine and Evans, M. and Mogilevtsev, D. and Sánchez-Soto, L. L.}, year={2024} }","ama":"Teo YS, Shringarpure SU, Jeong H, et al. Relative-belief inference in quantum information theory. Physical Review A. 2024;110(1). doi:10.1103/physreva.110.012231","mla":"Teo, Y. S., et al. “Relative-Belief Inference in Quantum Information Theory.” Physical Review A, vol. 110, no. 1, 012231, American Physical Society (APS), 2024, doi:10.1103/physreva.110.012231.","chicago":"Teo, Y. S., S. U. Shringarpure, H. Jeong, Nidhin Prasannan, Benjamin Brecht, Christine Silberhorn, M. Evans, D. Mogilevtsev, and L. L. Sánchez-Soto. “Relative-Belief Inference in Quantum Information Theory.” Physical Review A 110, no. 1 (2024). https://doi.org/10.1103/physreva.110.012231.","short":"Y.S. Teo, S.U. Shringarpure, H. Jeong, N. Prasannan, B. Brecht, C. Silberhorn, M. Evans, D. Mogilevtsev, L.L. Sánchez-Soto, Physical Review A 110 (2024).","ieee":"Y. S. Teo et al., “Relative-belief inference in quantum information theory,” Physical Review A, vol. 110, no. 1, Art. no. 012231, 2024, doi: 10.1103/physreva.110.012231.","apa":"Teo, Y. S., Shringarpure, S. U., Jeong, H., Prasannan, N., Brecht, B., Silberhorn, C., Evans, M., Mogilevtsev, D., & Sánchez-Soto, L. L. (2024). Relative-belief inference in quantum information theory. Physical Review A, 110(1), Article 012231. https://doi.org/10.1103/physreva.110.012231"},"article_number":"012231","language":[{"iso":"eng"}],"doi":"10.1103/physreva.110.012231","title":"Relative-belief inference in quantum information theory","year":"2024","author":[{"first_name":"Y. S.","last_name":"Teo","full_name":"Teo, Y. S."},{"full_name":"Shringarpure, S. U.","last_name":"Shringarpure","first_name":"S. U."},{"full_name":"Jeong, H.","last_name":"Jeong","first_name":"H."},{"full_name":"Prasannan, Nidhin","first_name":"Nidhin","last_name":"Prasannan","id":"71403"},{"id":"27150","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"last_name":"Evans","first_name":"M.","full_name":"Evans, M."},{"last_name":"Mogilevtsev","first_name":"D.","full_name":"Mogilevtsev, D."},{"last_name":"Sánchez-Soto","first_name":"L. L.","full_name":"Sánchez-Soto, L. L."}],"publication_identifier":{"issn":["2469-9926","2469-9934"]},"date_updated":"2025-12-18T16:12:40Z","publication_status":"published","intvolume":" 110","date_created":"2025-12-18T16:12:21Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"}],"publication":"Physical Review A","issue":"1","abstract":[{"lang":"eng","text":"We introduce the framework of Bayesian relative belief that directly evaluates whether or not the experimental data at hand support a given hypothesis regarding a quantum system by directly comparing the prior and posterior probabilities for the hypothesis. In model-dimension certification tasks, we show that the relative-belief procedure typically chooses Hilbert spaces that are never smaller in dimension than those selected from optimizing a broad class of information criteria, including Akaike's criterion. As a concrete and focused exposition of this powerful evidence-based technique, we apply the relative-belief procedure to an important application: . In particular, just by comparing prior and posterior probabilities based on data, we demonstrate its capability of tracking multiphoton emissions using (realistically lossy) single-photon detectors in order to assess the actual quality of photon sources without making assumptions, thereby reliably safeguarding source integrity for general quantum-information and communication tasks with Bayesian reasoning. Finally, we discuss how relative belief can be exploited to carry out parametric model certification and estimate the total dimension of the quantum state for the combined (measured) physical and interacting external systems described by the Tavis-Cummings model.\r\n \r\n \r\n \r\n \r\n Published by the American Physical Society\r\n 2024\r\n \r\n \r\n "}]},{"publisher":"Optica Publishing Group","_id":"63216","volume":33,"user_id":"27150","status":"public","citation":{"chicago":"Bhattacharjee, Abhinandan, Patrick Fabian Folge, Laura Maria Serino, Jaroslav Řeháček, Zdeněk Hradil, Christine Silberhorn, and Benjamin Brecht. “Pulse Characterization at the Single-Photon Level through Chronocyclic Q-Function Measurements.” Optics Express 33, no. 3 (2024). https://doi.org/10.1364/oe.540125.","short":"A. Bhattacharjee, P.F. Folge, L.M. Serino, J. Řeháček, Z. Hradil, C. Silberhorn, B. Brecht, Optics Express 33 (2024).","ieee":"A. Bhattacharjee et al., “Pulse characterization at the single-photon level through chronocyclic Q-function measurements,” Optics Express, vol. 33, no. 3, Art. no. 5551, 2024, doi: 10.1364/oe.540125.","apa":"Bhattacharjee, A., Folge, P. F., Serino, L. M., Řeháček, J., Hradil, Z., Silberhorn, C., & Brecht, B. (2024). Pulse characterization at the single-photon level through chronocyclic Q-function measurements. Optics Express, 33(3), Article 5551. https://doi.org/10.1364/oe.540125","bibtex":"@article{Bhattacharjee_Folge_Serino_Řeháček_Hradil_Silberhorn_Brecht_2024, title={Pulse characterization at the single-photon level through chronocyclic Q-function measurements}, volume={33}, DOI={10.1364/oe.540125}, number={35551}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Bhattacharjee, Abhinandan and Folge, Patrick Fabian and Serino, Laura Maria and Řeháček, Jaroslav and Hradil, Zdeněk and Silberhorn, Christine and Brecht, Benjamin}, year={2024} }","ama":"Bhattacharjee A, Folge PF, Serino LM, et al. Pulse characterization at the single-photon level through chronocyclic Q-function measurements. Optics Express. 2024;33(3). doi:10.1364/oe.540125","mla":"Bhattacharjee, Abhinandan, et al. “Pulse Characterization at the Single-Photon Level through Chronocyclic Q-Function Measurements.” Optics Express, vol. 33, no. 3, 5551, Optica Publishing Group, 2024, doi:10.1364/oe.540125."},"language":[{"iso":"eng"}],"article_number":"5551","doi":"10.1364/oe.540125","author":[{"id":"95902","full_name":"Bhattacharjee, Abhinandan","last_name":"Bhattacharjee","first_name":"Abhinandan"},{"full_name":"Folge, Patrick Fabian","first_name":"Patrick Fabian","last_name":"Folge","id":"88605"},{"id":"88242","full_name":"Serino, Laura Maria","last_name":"Serino","first_name":"Laura Maria"},{"full_name":"Řeháček, Jaroslav","last_name":"Řeháček","first_name":"Jaroslav"},{"full_name":"Hradil, Zdeněk","first_name":"Zdeněk","last_name":"Hradil"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"},{"id":"27150","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht","full_name":"Brecht, Benjamin"}],"publication_identifier":{"issn":["1094-4087"]},"year":"2024","title":"Pulse characterization at the single-photon level through chronocyclic Q-function measurements","intvolume":" 33","date_updated":"2025-12-18T16:08:40Z","publication_status":"published","date_created":"2025-12-18T16:08:16Z","department":[{"_id":"15"},{"_id":"623"}],"type":"journal_article","issue":"3","publication":"Optics Express","abstract":[{"lang":"eng","text":"The characterization of the complex spectral amplitude, that is, the spectrum and spectral phase, of single-photon-level light fields is a crucial capability for modern photonic quantum technologies. Since established pulse characterization techniques are not applicable at low intensities, alternative approaches are required. Here, we demonstrate the retrieval of the complex spectral amplitude of single-photon-level light pulses through measuring their chronocyclic Q −function. Our approach draws inspiration from quantum state tomography by exploiting the analogy between quadrature phase space and time-frequency phase space. In the experiment, we perform time-frequency projections with a quantum pulse gate (QPG), which directly yield the chronocyclic Q −function. We evaluate the complex spectral amplitude from the measured chronocyclic Q −function data with maximum likelihood estimation (MLE), which is the established technique for quantum state tomography. The MLE yields not only an unambigious estimate of the complex spectral amplitude of the state under test that does not require any a priori information, but also allows for, in principle, estimating the spectral-temporal coherence properties of the state. Our method accurately recovers features such as jumps in the spectral phase and is resistant against regions with zero spectral intensity, which makes it immediately beneficial for classical pulse characterization problems."}]},{"status":"public","_id":"63220","publisher":"American Physical Society (APS)","volume":133,"user_id":"27150","citation":{"short":"Y.S. Teo, S.U. Shringarpure, H. Jeong, N. Prasannan, B. Brecht, C. Silberhorn, M. Evans, D. Mogilevtsev, L.L. Sánchez-Soto, Physical Review Letters 133 (2024).","ama":"Teo YS, Shringarpure SU, Jeong H, et al. Evidence-Based Certification of Quantum Dimensions. Physical Review Letters. 2024;133(5). doi:10.1103/physrevlett.133.050204","chicago":"Teo, Y. S., S. U. Shringarpure, H. Jeong, Nidhin Prasannan, Benjamin Brecht, Christine Silberhorn, M. Evans, D. Mogilevtsev, and L. L. Sánchez-Soto. “Evidence-Based Certification of Quantum Dimensions.” Physical Review Letters 133, no. 5 (2024). https://doi.org/10.1103/physrevlett.133.050204.","bibtex":"@article{Teo_Shringarpure_Jeong_Prasannan_Brecht_Silberhorn_Evans_Mogilevtsev_Sánchez-Soto_2024, title={Evidence-Based Certification of Quantum Dimensions}, volume={133}, DOI={10.1103/physrevlett.133.050204}, number={5050204}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Teo, Y. S. and Shringarpure, S. U. and Jeong, H. and Prasannan, Nidhin and Brecht, Benjamin and Silberhorn, Christine and Evans, M. and Mogilevtsev, D. and Sánchez-Soto, L. L.}, year={2024} }","mla":"Teo, Y. S., et al. “Evidence-Based Certification of Quantum Dimensions.” Physical Review Letters, vol. 133, no. 5, 050204, American Physical Society (APS), 2024, doi:10.1103/physrevlett.133.050204.","apa":"Teo, Y. S., Shringarpure, S. U., Jeong, H., Prasannan, N., Brecht, B., Silberhorn, C., Evans, M., Mogilevtsev, D., & Sánchez-Soto, L. L. (2024). Evidence-Based Certification of Quantum Dimensions. Physical Review Letters, 133(5), Article 050204. https://doi.org/10.1103/physrevlett.133.050204","ieee":"Y. S. Teo et al., “Evidence-Based Certification of Quantum Dimensions,” Physical Review Letters, vol. 133, no. 5, Art. no. 050204, 2024, doi: 10.1103/physrevlett.133.050204."},"publication_identifier":{"issn":["0031-9007","1079-7114"]},"author":[{"first_name":"Y. S.","last_name":"Teo","full_name":"Teo, Y. S."},{"last_name":"Shringarpure","first_name":"S. U.","full_name":"Shringarpure, S. U."},{"first_name":"H.","last_name":"Jeong","full_name":"Jeong, H."},{"id":"71403","full_name":"Prasannan, Nidhin","last_name":"Prasannan","first_name":"Nidhin"},{"id":"27150","full_name":"Brecht, Benjamin","first_name":"Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"full_name":"Evans, M.","last_name":"Evans","first_name":"M."},{"full_name":"Mogilevtsev, D.","first_name":"D.","last_name":"Mogilevtsev"},{"full_name":"Sánchez-Soto, L. L.","last_name":"Sánchez-Soto","first_name":"L. L."}],"title":"Evidence-Based Certification of Quantum Dimensions","year":"2024","intvolume":" 133","date_updated":"2025-12-18T16:13:14Z","publication_status":"published","language":[{"iso":"eng"}],"article_number":"050204","doi":"10.1103/physrevlett.133.050204","issue":"5","publication":"Physical Review Letters","abstract":[{"text":"Identifying a reasonably small Hilbert space that completely describes an unknown quantum state is crucial for efficient quantum information processing. We introduce a general dimension-certification protocol for both discrete and continuous variables that is fully evidence based, relying solely on the experimental data collected and no other unjustified assumptions whatsoever. Using the Bayesian concept of relative belief, we take the effective dimension of the state as the smallest one such that the posterior probability is larger than the prior, as dictated by the data. The posterior probabilities associated with the relative-belief ratios measure the strength of the evidence provide by these ratios so that we can assess whether there is weak or strong evidence in favor or against a particular dimension. Using experimental data from spectral-temporal and polarimetry measurements, we demonstrate how to correctly assign Bayesian plausible error bars for the obtained effective dimensions. This makes relative belief a conservative and easy-to-use model-selection method for any experiment.\r\n \r\n \r\n \r\n \r\n Published by the American Physical Society\r\n 2024\r\n \r\n \r\n ","lang":"eng"}],"date_created":"2025-12-18T16:13:00Z","department":[{"_id":"15"},{"_id":"623"}],"type":"journal_article"},{"status":"public","user_id":"27150","volume":6,"_id":"54288","publisher":"American Physical Society (APS)","project":[{"_id":"216","name":"QuPoPCoRN: QUPOPCORN: Quantum Particles on Programmable Complex Reconfigurable Networks"}],"citation":{"apa":"De, S., Ansari, V., Sperling, J., Barkhofen, S., Brecht, B., & Silberhorn, C. (2024). Realization of high-fidelity unitary operations on up to 64 frequency bins. Physical Review Research, 6(2), Article L022040. https://doi.org/10.1103/physrevresearch.6.l022040","ieee":"S. De, V. Ansari, J. Sperling, S. Barkhofen, B. Brecht, and C. Silberhorn, “Realization of high-fidelity unitary operations on up to 64 frequency bins,” Physical Review Research, vol. 6, no. 2, Art. no. L022040, 2024, doi: 10.1103/physrevresearch.6.l022040.","short":"S. De, V. Ansari, J. Sperling, S. Barkhofen, B. Brecht, C. Silberhorn, Physical Review Research 6 (2024).","chicago":"De, Syamsundar, Vahid Ansari, Jan Sperling, Sonja Barkhofen, Benjamin Brecht, and Christine Silberhorn. “Realization of High-Fidelity Unitary Operations on up to 64 Frequency Bins.” Physical Review Research 6, no. 2 (2024). https://doi.org/10.1103/physrevresearch.6.l022040.","mla":"De, Syamsundar, et al. “Realization of High-Fidelity Unitary Operations on up to 64 Frequency Bins.” Physical Review Research, vol. 6, no. 2, L022040, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.l022040.","ama":"De S, Ansari V, Sperling J, Barkhofen S, Brecht B, Silberhorn C. Realization of high-fidelity unitary operations on up to 64 frequency bins. Physical Review Research. 2024;6(2). doi:10.1103/physrevresearch.6.l022040","bibtex":"@article{De_Ansari_Sperling_Barkhofen_Brecht_Silberhorn_2024, title={Realization of high-fidelity unitary operations on up to 64 frequency bins}, volume={6}, DOI={10.1103/physrevresearch.6.l022040}, number={2L022040}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={De, Syamsundar and Ansari, Vahid and Sperling, Jan and Barkhofen, Sonja and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }"},"publication_status":"published","date_updated":"2025-12-18T16:14:39Z","intvolume":" 6","year":"2024","title":"Realization of high-fidelity unitary operations on up to 64 frequency bins","publication_identifier":{"issn":["2643-1564"]},"author":[{"full_name":"De, Syamsundar","last_name":"De","first_name":"Syamsundar"},{"full_name":"Ansari, Vahid","first_name":"Vahid","last_name":"Ansari"},{"first_name":"Jan","last_name":"Sperling","orcid":"0000-0002-5844-3205","full_name":"Sperling, Jan","id":"75127"},{"id":"48188","full_name":"Barkhofen, Sonja","first_name":"Sonja","last_name":"Barkhofen"},{"id":"27150","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin"},{"last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine","id":"26263"}],"doi":"10.1103/physrevresearch.6.l022040","article_number":"L022040","language":[{"iso":"eng"}],"abstract":[{"text":"The ability to apply user-chosen large-scale unitary operations with high fidelity to a quantum state is key to realizing future photonic quantum technologies. Here, we realize the implementation of programmable unitary operations on up to 64 frequency-bin modes. To benchmark the performance of our system, we probe different quantum walk unitary operations, in particular, Grover walks on four-dimensional hypercubes with similarities exceeding 95% and quantum walks with 400 steps on circles and finite lines with similarities of 98%. Our results open a path toward implementing high-quality unitary operations, which can form the basis for applications in complex tasks, such as Gaussian boson sampling.\r\n \r\n \r\n \r\n \r\n Published by the American Physical Society\r\n 2024\r\n \r\n \r\n ","lang":"eng"}],"publication":"Physical Review Research","issue":"2","type":"journal_article","department":[{"_id":"623"},{"_id":"288"},{"_id":"15"}],"date_created":"2024-05-14T12:40:48Z"},{"article_number":"040329","language":[{"iso":"eng"}],"doi":"10.1103/prxquantum.5.040329","year":"2024","title":"A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates","author":[{"id":"88605","first_name":"Patrick Fabian","last_name":"Folge","full_name":"Folge, Patrick Fabian"},{"full_name":"Stefszky, Michael","first_name":"Michael","last_name":"Stefszky","id":"42777"},{"orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin","id":"27150"},{"id":"26263","first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["2691-3399"]},"date_updated":"2025-12-18T16:10:55Z","publication_status":"published","intvolume":" 5","date_created":"2025-12-18T16:10:37Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"}],"publication":"PRX Quantum","issue":"4","abstract":[{"text":"Linear optical quantum networks, consisting of a quantum input state and a multiport interferometer, are an important building block for many quantum technological concepts, e.g., Gaussian boson sampling. Here, we propose the implementation of such networks based on frequency conversion by utilizing a so-called multioutput quantum pulse gate (MQPG). This approach allows the resource-efficient and therefore scalable implementation of frequency-bin-based, fully programmable interferometers in a single spatial and polarization mode. Quantum input states for this network can be provided by utilizing the strong frequency entanglement of a type-0 parametric down-conversion (PDC) source. Here, we develop a theoretical framework to describe linear networks based on an MQPG and PDC and utilize it to investigate the limits and scalabilty of our approach.\r\n \r\n \r\n \r\n \r\n Published by the American Physical Society\r\n 2024\r\n \r\n \r\n ","lang":"eng"}],"publisher":"American Physical Society (APS)","_id":"63218","user_id":"27150","volume":5,"status":"public","citation":{"short":"P.F. Folge, M. Stefszky, B. Brecht, C. Silberhorn, PRX Quantum 5 (2024).","chicago":"Folge, Patrick Fabian, Michael Stefszky, Benjamin Brecht, and Christine Silberhorn. “A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates.” PRX Quantum 5, no. 4 (2024). https://doi.org/10.1103/prxquantum.5.040329.","ieee":"P. F. Folge, M. Stefszky, B. Brecht, and C. Silberhorn, “A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates,” PRX Quantum, vol. 5, no. 4, Art. no. 040329, 2024, doi: 10.1103/prxquantum.5.040329.","apa":"Folge, P. F., Stefszky, M., Brecht, B., & Silberhorn, C. (2024). A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates. PRX Quantum, 5(4), Article 040329. https://doi.org/10.1103/prxquantum.5.040329","bibtex":"@article{Folge_Stefszky_Brecht_Silberhorn_2024, title={A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates}, volume={5}, DOI={10.1103/prxquantum.5.040329}, number={4040329}, journal={PRX Quantum}, publisher={American Physical Society (APS)}, author={Folge, Patrick Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }","ama":"Folge PF, Stefszky M, Brecht B, Silberhorn C. A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates. PRX Quantum. 2024;5(4). doi:10.1103/prxquantum.5.040329","mla":"Folge, Patrick Fabian, et al. “A Framework for Fully Programmable Frequency-Encoded Quantum Networks Harnessing Multioutput Quantum Pulse Gates.” PRX Quantum, vol. 5, no. 4, 040329, American Physical Society (APS), 2024, doi:10.1103/prxquantum.5.040329."}},{"citation":{"mla":"Serino, Laura Maria, et al. “Programmable Time-Frequency Mode-Sorting of Single Photons with a Multi-Output Quantum Pulse Gate.” Optics Express, vol. 33, no. 3, 5577, Optica Publishing Group, 2024, doi:10.1364/oe.544206.","ama":"Serino LM, Eigner C, Brecht B, Silberhorn C. Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate. Optics Express. 2024;33(3). doi:10.1364/oe.544206","bibtex":"@article{Serino_Eigner_Brecht_Silberhorn_2024, title={Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate}, volume={33}, DOI={10.1364/oe.544206}, number={35577}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Serino, Laura Maria and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }","apa":"Serino, L. M., Eigner, C., Brecht, B., & Silberhorn, C. (2024). Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate. Optics Express, 33(3), Article 5577. https://doi.org/10.1364/oe.544206","ieee":"L. M. Serino, C. Eigner, B. Brecht, and C. Silberhorn, “Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate,” Optics Express, vol. 33, no. 3, Art. no. 5577, 2024, doi: 10.1364/oe.544206.","short":"L.M. Serino, C. Eigner, B. Brecht, C. Silberhorn, Optics Express 33 (2024).","chicago":"Serino, Laura Maria, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Programmable Time-Frequency Mode-Sorting of Single Photons with a Multi-Output Quantum Pulse Gate.” Optics Express 33, no. 3 (2024). https://doi.org/10.1364/oe.544206."},"publisher":"Optica Publishing Group","_id":"63217","volume":33,"user_id":"27150","status":"public","date_created":"2025-12-18T16:09:22Z","department":[{"_id":"15"},{"_id":"623"}],"type":"journal_article","publication":"Optics Express","issue":"3","abstract":[{"text":"We demonstrate a high-dimensional mode-sorter for single photons based on a multi-output quantum pulse gate, which we can program to switch between different temporal-mode encodings including pulse modes, frequency bins, time bins, and their superpositions. This device can facilitate practical realizations of quantum information applications such as high-dimensional quantum key distribution and thus enables secure communication with enhanced information capacity. We characterize the mode-sorter through a detector tomography in 3 and 5 dimensions and find a fidelity up to 0.958 ± 0.030 at the single-photon level.","lang":"eng"}],"language":[{"iso":"eng"}],"article_number":"5577","doi":"10.1364/oe.544206","author":[{"full_name":"Serino, Laura Maria","first_name":"Laura Maria","last_name":"Serino","id":"88242"},{"id":"13244","full_name":"Eigner, Christof","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof","last_name":"Eigner"},{"orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht","full_name":"Brecht, Benjamin","id":"27150"},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["1094-4087"]},"title":"Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate","year":"2024","intvolume":" 33","date_updated":"2025-12-18T16:09:44Z","publication_status":"published"},{"article_number":"23945","language":[{"iso":"eng"}],"doi":"10.1364/oe.522549","title":"Integrated, bright broadband, two-colour parametric down-conversion source","year":"2024","author":[{"full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René","id":"78890"},{"full_name":"Roeder, Franz","last_name":"Roeder","first_name":"Franz","id":"88149"},{"full_name":"Quiring, Victor","first_name":"Victor","last_name":"Quiring"},{"full_name":"Ricken, Raimund","last_name":"Ricken","first_name":"Raimund"},{"full_name":"Eigner, Christof","first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244"},{"orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin","full_name":"Brecht, Benjamin","id":"27150"},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"}],"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","date_updated":"2025-12-19T11:37:41Z","article_type":"original","intvolume":" 32","date_created":"2024-06-19T06:58:17Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"publication":"Optics Express","issue":"14","abstract":[{"lang":"eng","text":"Broadband quantum light is a vital resource for quantum metrology and spectroscopy applications such as quantum optical coherence tomography or entangled two photon absorption. For entangled two photon absorption in particular, very high photon flux combined with high time-frequency entanglement is crucial for observing a signal. So far these conditions could be met by using high power lasers driving degenerate, type 0 bulk-crystal spontaneous parametric down conversion (SPDC) sources. This naturally limits the available wavelength ranges and precludes deterministic splitting of the generated output photons. In this work we demonstrate an integrated two-colour SPDC source utilising a group-velocity matched lithium niobate waveguide, reaching both exceptional brightness 1.52⋅106pairssmWGHz and large bandwidth (7.8 THz FWHM) while pumped with a few mW of continuous wave (CW) laser light. By converting a narrow band pump to broadband pulses the created photon pairs show correlation times of Δτ ≈ 120 fs while maintaining the narrow bandwidth Δω\r\n p\r\n ≪ 1 MHz of the CW pump light, yielding strong time-frequency entanglement. Furthermore our process can be adapted to a wide range of central wavelengths."}],"_id":"54815","publisher":"Optica Publishing Group","user_id":"78890","volume":32,"status":"public","citation":{"ieee":"R. Pollmann et al., “Integrated, bright broadband, two-colour parametric down-conversion source,” Optics Express, vol. 32, no. 14, Art. no. 23945, 2024, doi: 10.1364/oe.522549.","apa":"Pollmann, R., Roeder, F., Quiring, V., Ricken, R., Eigner, C., Brecht, B., & Silberhorn, C. (2024). Integrated, bright broadband, two-colour parametric down-conversion source. Optics Express, 32(14), Article 23945. https://doi.org/10.1364/oe.522549","short":"R. Pollmann, F. Roeder, V. Quiring, R. Ricken, C. Eigner, B. Brecht, C. Silberhorn, Optics Express 32 (2024).","chicago":"Pollmann, René, Franz Roeder, Victor Quiring, Raimund Ricken, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Integrated, Bright Broadband, Two-Colour Parametric down-Conversion Source.” Optics Express 32, no. 14 (2024). https://doi.org/10.1364/oe.522549.","mla":"Pollmann, René, et al. “Integrated, Bright Broadband, Two-Colour Parametric down-Conversion Source.” Optics Express, vol. 32, no. 14, 23945, Optica Publishing Group, 2024, doi:10.1364/oe.522549.","bibtex":"@article{Pollmann_Roeder_Quiring_Ricken_Eigner_Brecht_Silberhorn_2024, title={Integrated, bright broadband, two-colour parametric down-conversion source}, volume={32}, DOI={10.1364/oe.522549}, number={1423945}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Pollmann, René and Roeder, Franz and Quiring, Victor and Ricken, Raimund and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }","ama":"Pollmann R, Roeder F, Quiring V, et al. Integrated, bright broadband, two-colour parametric down-conversion source. Optics Express. 2024;32(14). doi:10.1364/oe.522549"}},{"language":[{"iso":"eng"}],"article_number":"123025","doi":"10.1088/1367-2630/ad9f98","author":[{"id":"88149","first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz"},{"full_name":"Gnanavel, Abira","last_name":"Gnanavel","first_name":"Abira"},{"id":"78890","full_name":"Pollmann, René","first_name":"René","last_name":"Pollmann"},{"full_name":"Brecht, Olga","first_name":"Olga","last_name":"Brecht"},{"last_name":"Stefszky","first_name":"Michael","full_name":"Stefszky, Michael","id":"42777"},{"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"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"id":"27150","full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin","last_name":"Brecht"}],"publication_identifier":{"issn":["1367-2630"]},"title":"Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared","year":"2024","intvolume":" 26","article_type":"original","date_updated":"2025-12-19T11:36:36Z","publication_status":"published","date_created":"2024-12-27T19:01:14Z","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"type":"journal_article","publication":"New Journal of Physics","issue":"12","abstract":[{"lang":"eng","text":"The latest applications in ultrafast quantum metrology require bright, broadband bi-photon sources with one of the photons in the mid-infrared and the other in the visible to near infrared. However, existing sources based on bulk crystals are limited in brightness due to the short interaction length and only allow for limited dispersion engineering. Here, we present an integrated PDC source based on a Ti:LiNbO3 waveguide that generates broadband bi-photons with central wavelengths at 860 nm and 2800 nm. Their spectral bandwidth exceeds 25 THz and is achieved by simultaneous matching of the group velocities (GVs) and cancellation of GV dispersion for the signal and idler field. We provide an intuitive understanding of the process by studying our source’s behavior at different temperatures and pump wavelengths, which agrees well with simulations."}],"publisher":"IOP Publishing","_id":"57862","volume":26,"user_id":"78890","status":"public","citation":{"short":"F. Roeder, A. Gnanavel, R. Pollmann, O. Brecht, M. Stefszky, L. Padberg, C. Eigner, C. Silberhorn, B. Brecht, New Journal of Physics 26 (2024).","chicago":"Roeder, Franz, Abira Gnanavel, René Pollmann, Olga Brecht, Michael Stefszky, Laura Padberg, Christof Eigner, Christine Silberhorn, and Benjamin Brecht. “Ultra-Broadband Non-Degenerate Guided-Wave Bi-Photon Source in the near and Mid-Infrared.” New Journal of Physics 26, no. 12 (2024). https://doi.org/10.1088/1367-2630/ad9f98.","apa":"Roeder, F., Gnanavel, A., Pollmann, R., Brecht, O., Stefszky, M., Padberg, L., Eigner, C., Silberhorn, C., & Brecht, B. (2024). Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared. New Journal of Physics, 26(12), Article 123025. https://doi.org/10.1088/1367-2630/ad9f98","ieee":"F. Roeder et al., “Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared,” New Journal of Physics, vol. 26, no. 12, Art. no. 123025, 2024, doi: 10.1088/1367-2630/ad9f98.","ama":"Roeder F, Gnanavel A, Pollmann R, et al. Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared. New Journal of Physics. 2024;26(12). doi:10.1088/1367-2630/ad9f98","bibtex":"@article{Roeder_Gnanavel_Pollmann_Brecht_Stefszky_Padberg_Eigner_Silberhorn_Brecht_2024, title={Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared}, volume={26}, DOI={10.1088/1367-2630/ad9f98}, number={12123025}, journal={New Journal of Physics}, publisher={IOP Publishing}, author={Roeder, Franz and Gnanavel, Abira and Pollmann, René and Brecht, Olga and Stefszky, Michael and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Brecht, Benjamin}, year={2024} }","mla":"Roeder, Franz, et al. “Ultra-Broadband Non-Degenerate Guided-Wave Bi-Photon Source in the near and Mid-Infrared.” New Journal of Physics, vol. 26, no. 12, 123025, IOP Publishing, 2024, doi:10.1088/1367-2630/ad9f98."},"project":[{"name":"MIRAQLS: MIRAQLS: Mid-infrared Quantum Technology for Sensing","_id":"571"},{"name":"E2TPA: Exploiting Entangled Two-Photon Absorption","_id":"190"}]},{"title":"Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals","year":"2024","author":[{"full_name":"Bollmers, Laura","last_name":"Bollmers","first_name":"Laura","id":"61375"},{"last_name":"Babai-Hemati","first_name":"Tobias","full_name":"Babai-Hemati, Tobias"},{"full_name":"Koppitz, Boris","last_name":"Koppitz","first_name":"Boris"},{"id":"13244","full_name":"Eigner, Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof"},{"id":"40300","full_name":"Padberg, Laura","first_name":"Laura","last_name":"Padberg"},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"},{"last_name":"Eng","first_name":"Lukas M.","full_name":"Eng, Lukas M."},{"id":"26263","last_name":"Silberhorn","first_name":"Christine","full_name":"Silberhorn, Christine"}],"publication_identifier":{"issn":["0003-6951","1077-3118"]},"publication_status":"published","date_updated":"2024-11-15T09:15:08Z","intvolume":" 125","language":[{"iso":"eng"}],"doi":"10.1063/5.0210972","issue":"15","publication":"Applied Physics Letters","abstract":[{"text":"Lithium niobate and lithium tantalate are among the most widespread materials for nonlinear, integrated photonics. Mixed crystals with arbitrary Nb–Ta ratios provide an additional degree of freedom to not only tune materials properties, such as the birefringence but also leverage the advantages of the singular compounds, for example, by combining the thermal stability of lithium tantalate with the larger nonlinear or piezoelectric constants of lithium niobate. Periodic poling allows to achieve phase-matching independent of waveguide geometry and is, therefore, one of the commonly used methods in integrated nonlinear optics. For mixed crystals, periodic poling has been challenging so far due to the lack of homogeneous, mono-domain crystals, which severely inhibit domain growth and nucleation. In this work, we investigate surface-near (<1μm depth) domain inversion on x-cut lithium niobate tantalate mixed crystals via electric field poling and lithographically structured electrodes. We find that naturally occurring head-to-head or tail-to-tail domain walls in the as-grown crystal inhibit domain inversion at a larger scale. However, periodic poling is possible if the gap size between the poling electrodes is of the same order of magnitude or smaller than the average size of naturally occurring domains. This work provides the basis for the nonlinear optical application of lithium niobate tantalate mixed crystals.","lang":"eng"}],"date_created":"2024-11-13T08:06:59Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"230"},{"_id":"288"}],"status":"public","publisher":"AIP Publishing","_id":"57028","user_id":"61375","volume":125,"citation":{"chicago":"Bollmers, Laura, Tobias Babai-Hemati, Boris Koppitz, Christof Eigner, Laura Padberg, Michael Rüsing, Lukas M. Eng, and Christine Silberhorn. “Surface-near Domain Engineering in Multi-Domain x-Cut Lithium Niobate Tantalate Mixed Crystals.” Applied Physics Letters 125, no. 15 (2024). https://doi.org/10.1063/5.0210972.","short":"L. Bollmers, T. Babai-Hemati, B. Koppitz, C. Eigner, L. Padberg, M. Rüsing, L.M. Eng, C. Silberhorn, Applied Physics Letters 125 (2024).","ieee":"L. Bollmers et al., “Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals,” Applied Physics Letters, vol. 125, no. 15, 2024, doi: 10.1063/5.0210972.","apa":"Bollmers, L., Babai-Hemati, T., Koppitz, B., Eigner, C., Padberg, L., Rüsing, M., Eng, L. M., & Silberhorn, C. (2024). Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals. Applied Physics Letters, 125(15). https://doi.org/10.1063/5.0210972","bibtex":"@article{Bollmers_Babai-Hemati_Koppitz_Eigner_Padberg_Rüsing_Eng_Silberhorn_2024, title={Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals}, volume={125}, DOI={10.1063/5.0210972}, number={15}, journal={Applied Physics Letters}, publisher={AIP Publishing}, author={Bollmers, Laura and Babai-Hemati, Tobias and Koppitz, Boris and Eigner, Christof and Padberg, Laura and Rüsing, Michael and Eng, Lukas M. and Silberhorn, Christine}, year={2024} }","ama":"Bollmers L, Babai-Hemati T, Koppitz B, et al. Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals. Applied Physics Letters. 2024;125(15). doi:10.1063/5.0210972","mla":"Bollmers, Laura, et al. “Surface-near Domain Engineering in Multi-Domain x-Cut Lithium Niobate Tantalate Mixed Crystals.” Applied Physics Letters, vol. 125, no. 15, AIP Publishing, 2024, doi:10.1063/5.0210972."},"project":[{"name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","grant_number":"231447078","_id":"168"}]},{"date_created":"2024-11-15T10:20:33Z","type":"conference_abstract","department":[{"_id":"58"},{"_id":"623"}],"citation":{"chicago":"Kress, Christian, Tobias Schwabe, Martin Miroslavov Mihaylov, Christine Silberhorn, and J. Christoph Scheytt. “Integrated Pulse Generator for Photon Pair Generation Using Lithium Niobate on Insulator Technology,” 2024.","short":"C. Kress, T. Schwabe, M.M. Mihaylov, C. Silberhorn, J.C. Scheytt, in: 2024.","ama":"Kress C, Schwabe T, Mihaylov MM, Silberhorn C, Scheytt JC. Integrated Pulse Generator for Photon Pair Generation using Lithium Niobate on Insulator Technology. In: ; 2024.","bibtex":"@inproceedings{Kress_Schwabe_Mihaylov_Silberhorn_Scheytt_2024, title={Integrated Pulse Generator for Photon Pair Generation using Lithium Niobate on Insulator Technology}, author={Kress, Christian and Schwabe, Tobias and Mihaylov, Martin Miroslavov and Silberhorn, Christine and Scheytt, J. Christoph}, year={2024} }","apa":"Kress, C., Schwabe, T., Mihaylov, M. M., Silberhorn, C., & Scheytt, J. C. (2024). Integrated Pulse Generator for Photon Pair Generation using Lithium Niobate on Insulator Technology. Quantum Photonics Spotlight, Paderborn.","mla":"Kress, Christian, et al. Integrated Pulse Generator for Photon Pair Generation Using Lithium Niobate on Insulator Technology. 2024.","ieee":"C. Kress, T. Schwabe, M. M. Mihaylov, C. Silberhorn, and J. C. Scheytt, “Integrated Pulse Generator for Photon Pair Generation using Lithium Niobate on Insulator Technology,” presented at the Quantum Photonics Spotlight, Paderborn, 2024."},"project":[{"grant_number":"231447078","_id":"175","name":"TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen Modulatoren auf Basis von CMOS und LNOI (C11*)"}],"language":[{"iso":"eng"}],"_id":"57107","user_id":"13256","status":"public","year":"2024","title":"Integrated Pulse Generator for Photon Pair Generation using Lithium Niobate on Insulator Technology","author":[{"first_name":"Christian","last_name":"Kress","full_name":"Kress, Christian","id":"13256"},{"last_name":"Schwabe","first_name":"Tobias","full_name":"Schwabe, Tobias","id":"39217"},{"id":"42449","full_name":"Mihaylov, Martin Miroslavov","last_name":"Mihaylov","first_name":"Martin Miroslavov"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"id":"37144","full_name":"Scheytt, J. Christoph","first_name":"J. Christoph","last_name":"Scheytt","orcid":"0000-0002-5950-6618 "}],"conference":{"end_date":"2024-10-10","start_date":"2024-10-08","name":"Quantum Photonics Spotlight","location":"Paderborn"},"date_updated":"2024-11-15T10:21:02Z"},{"_id":"57089","publication_date":"2024-10-24","user_id":"38254","status":"public","year":"2024","title":"Quantenoptisch-unterstütztes Sende-/Empfangssystem","author":[{"full_name":"Kruse, Stephan","first_name":"Stephan","last_name":"Kruse","id":"38254"},{"id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin"},{"id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn"},{"id":"88242","last_name":"Serino","first_name":"Laura Maria","full_name":"Serino, Laura Maria"}],"date_updated":"2024-11-15T13:58:41Z","ipn":"10 2023 203 697.5","date_created":"2024-11-14T16:11:10Z","type":"patent","department":[{"_id":"623"},{"_id":"58"}],"citation":{"chicago":"Kruse, Stephan, Benjamin Brecht, Christine Silberhorn, and Laura Maria Serino. “Quantenoptisch-Unterstütztes Sende-/Empfangssystem,” 2024.","short":"S. Kruse, B. Brecht, C. Silberhorn, L.M. Serino, (2024).","ieee":"S. Kruse, B. Brecht, C. Silberhorn, and L. M. Serino, “Quantenoptisch-unterstütztes Sende-/Empfangssystem.” 2024.","apa":"Kruse, S., Brecht, B., Silberhorn, C., & Serino, L. M. (2024). Quantenoptisch-unterstütztes Sende-/Empfangssystem.","bibtex":"@article{Kruse_Brecht_Silberhorn_Serino_2024, title={Quantenoptisch-unterstütztes Sende-/Empfangssystem}, author={Kruse, Stephan and Brecht, Benjamin and Silberhorn, Christine and Serino, Laura Maria}, year={2024} }","ama":"Kruse S, Brecht B, Silberhorn C, Serino LM. Quantenoptisch-unterstütztes Sende-/Empfangssystem. Published online 2024.","mla":"Kruse, Stephan, et al. Quantenoptisch-Unterstütztes Sende-/Empfangssystem. 2024."},"ipc":"G01S 7/481"},{"publication":"Opto-Electronics Review","citation":{"short":"P.A. Meier, S. Keuker-Baumann, T. Röder, H. Herrmann, R. Ricken, C. Silberhorn, H.-S. Kitzerow, Opto-Electronics Review (2024) 150611–150611.","chicago":"Meier, Patrick A., Susanne Keuker-Baumann, Thorsten Röder, Harald Herrmann, Raimund Ricken, Christine Silberhorn, and Heinz-Siegfried Kitzerow. “Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals.” Opto-Electronics Review, 2024, 150611–150611. https://doi.org/10.24425/opelre.2024.150611.","ieee":"P. A. Meier et al., “Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals,” Opto-Electronics Review, pp. 150611–150611, 2024, doi: 10.24425/opelre.2024.150611.","apa":"Meier, P. A., Keuker-Baumann, S., Röder, T., Herrmann, H., Ricken, R., Silberhorn, C., & Kitzerow, H.-S. (2024). Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals. Opto-Electronics Review, 150611–150611. https://doi.org/10.24425/opelre.2024.150611","bibtex":"@article{Meier_Keuker-Baumann_Röder_Herrmann_Ricken_Silberhorn_Kitzerow_2024, title={Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals}, DOI={10.24425/opelre.2024.150611}, journal={Opto-Electronics Review}, publisher={Polish Academy of Sciences Chancellery}, author={Meier, Patrick A. and Keuker-Baumann, Susanne and Röder, Thorsten and Herrmann, Harald and Ricken, Raimund and Silberhorn, Christine and Kitzerow, Heinz-Siegfried}, year={2024}, pages={150611–150611} }","ama":"Meier PA, Keuker-Baumann S, Röder T, et al. Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals. Opto-Electronics Review. Published online 2024:150611-150611. doi:10.24425/opelre.2024.150611","mla":"Meier, Patrick A., et al. “Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals.” Opto-Electronics Review, Polish Academy of Sciences Chancellery, 2024, pp. 150611–150611, doi:10.24425/opelre.2024.150611."},"abstract":[{"text":"Ferroelectric liquid crystals exhibiting a chiral smectic C* phase are deposited on z cut periodically poled lithium niobate substrates and investigated by polarized optical microscopy. While the pure substrates placed between crossed polarizers and observed in transmission appear dark, uniformly aligned liquid crystal films deposited on these substrates show alternating domains with varying brightness. This effect can be attributed to the well-known coupling between the direction of the spontaneous polarization and the optical axis in the birefringent ferroelectric smectic C* phase. Quantitative measurements of the tilt angle between the local optical axis and the smectic layer normal confirm antiparallel orientations of spontaneous polarization of the liquid crystal from domain to domain, as expected by the periodic poling of the lithium niobate substrate. This effect provides a valuable non-destructive method of optical inspection of the quality of periodically poled ferroelectric substrates, which plays an important role in achieving quasi-phase-matching in non-linear optical applications.","lang":"eng"}],"date_created":"2024-12-08T14:37:43Z","type":"journal_article","department":[{"_id":"313"},{"_id":"230"},{"_id":"2"}],"year":"2024","status":"public","title":"Optical imaging of ferroelectric domains in periodically poled lithium niobate using ferroelectric liquid crystals","author":[{"first_name":"Patrick A.","last_name":"Meier","full_name":"Meier, Patrick A."},{"full_name":"Keuker-Baumann, Susanne","first_name":"Susanne","last_name":"Keuker-Baumann"},{"first_name":"Thorsten","last_name":"Röder","full_name":"Röder, Thorsten"},{"id":"216","full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald"},{"last_name":"Ricken","first_name":"Raimund","full_name":"Ricken, Raimund"},{"full_name":"Silberhorn, Christine","first_name":"Christine","last_name":"Silberhorn","id":"26263"},{"id":"254","first_name":"Heinz-Siegfried","last_name":"Kitzerow","full_name":"Kitzerow, Heinz-Siegfried"}],"publication_identifier":{"issn":["1896-3757"]},"date_updated":"2024-12-08T14:45:39Z","publication_status":"published","page":"150611-150611","publisher":"Polish Academy of Sciences Chancellery","_id":"57619","language":[{"iso":"pol"}],"doi":"10.24425/opelre.2024.150611","user_id":"254"},{"citation":{"mla":"Krishnaswamy, Suchitra, et al. “Experimental Retrieval of Photon Statistics from Click Detection.” Physical Review A, vol. 110, no. 2, 023717, American Physical Society (APS), 2024, doi:10.1103/physreva.110.023717.","ama":"Krishnaswamy S, Schlue F, Ares L, et al. Experimental retrieval of photon statistics from click detection. Physical Review A. 2024;110(2). doi:10.1103/physreva.110.023717","bibtex":"@article{Krishnaswamy_Schlue_Ares_Dyachuk_Stefszky_Brecht_Silberhorn_Sperling_2024, title={Experimental retrieval of photon statistics from click detection}, volume={110}, DOI={10.1103/physreva.110.023717}, number={2023717}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Krishnaswamy, Suchitra and Schlue, Fabian and Ares, L. and Dyachuk, V. and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Sperling, Jan}, year={2024} }","apa":"Krishnaswamy, S., Schlue, F., Ares, L., Dyachuk, V., Stefszky, M., Brecht, B., Silberhorn, C., & Sperling, J. (2024). Experimental retrieval of photon statistics from click detection. Physical Review A, 110(2), Article 023717. https://doi.org/10.1103/physreva.110.023717","ieee":"S. Krishnaswamy et al., “Experimental retrieval of photon statistics from click detection,” Physical Review A, vol. 110, no. 2, Art. no. 023717, 2024, doi: 10.1103/physreva.110.023717.","short":"S. Krishnaswamy, F. Schlue, L. Ares, V. Dyachuk, M. Stefszky, B. Brecht, C. Silberhorn, J. Sperling, Physical Review A 110 (2024).","chicago":"Krishnaswamy, Suchitra, Fabian Schlue, L. Ares, V. Dyachuk, Michael Stefszky, Benjamin Brecht, Christine Silberhorn, and Jan Sperling. “Experimental Retrieval of Photon Statistics from Click Detection.” Physical Review A 110, no. 2 (2024). https://doi.org/10.1103/physreva.110.023717."},"status":"public","_id":"57743","publisher":"American Physical Society (APS)","user_id":"75127","volume":110,"issue":"2","publication":"Physical Review A","date_created":"2024-12-11T15:33:08Z","type":"journal_article","department":[{"_id":"623"},{"_id":"15"},{"_id":"170"},{"_id":"706"},{"_id":"429"},{"_id":"623"}],"year":"2024","title":"Experimental retrieval of photon statistics from click detection","publication_identifier":{"issn":["2469-9926","2469-9934"]},"author":[{"last_name":"Krishnaswamy","first_name":"Suchitra","full_name":"Krishnaswamy, Suchitra","id":"78347"},{"full_name":"Schlue, Fabian","first_name":"Fabian","last_name":"Schlue","id":"63579"},{"first_name":"L.","last_name":"Ares","full_name":"Ares, L."},{"full_name":"Dyachuk, V.","last_name":"Dyachuk","first_name":"V."},{"last_name":"Stefszky","first_name":"Michael","full_name":"Stefszky, Michael","id":"42777"},{"first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin","id":"27150"},{"full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine","id":"26263"},{"last_name":"Sperling","first_name":"Jan","orcid":"0000-0002-5844-3205","full_name":"Sperling, Jan","id":"75127"}],"date_updated":"2024-12-11T15:35:07Z","publication_status":"published","intvolume":" 110","article_number":"023717","language":[{"iso":"eng"}],"doi":"10.1103/physreva.110.023717"},{"department":[{"_id":"58"}],"type":"conference","date_created":"2024-11-15T10:17:09Z","citation":{"ieee":"S. Kruse, B. Brecht, and C. Silberhorn, “A Quantum Pulse Gate Enhanced Photonic Radar Architecture ,” 2024, doi: 10.5281/zenodo.14934743.","apa":"Kruse, S., Brecht, B., & Silberhorn, C. (2024). A Quantum Pulse Gate Enhanced Photonic Radar Architecture . https://doi.org/10.5281/zenodo.14934743","short":"S. Kruse, B. Brecht, C. Silberhorn, in: 2024.","chicago":"Kruse, Stephan, Benjamin Brecht, and Christine Silberhorn. “A Quantum Pulse Gate Enhanced Photonic Radar Architecture ,” 2024. https://doi.org/10.5281/zenodo.14934743.","mla":"Kruse, Stephan, et al. A Quantum Pulse Gate Enhanced Photonic Radar Architecture . 2024, doi:10.5281/zenodo.14934743.","bibtex":"@inproceedings{Kruse_Brecht_Silberhorn_2024, title={A Quantum Pulse Gate Enhanced Photonic Radar Architecture }, DOI={10.5281/zenodo.14934743}, author={Kruse, Stephan and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }","ama":"Kruse S, Brecht B, Silberhorn C. A Quantum Pulse Gate Enhanced Photonic Radar Architecture . In: ; 2024. doi:10.5281/zenodo.14934743"},"doi":"10.5281/zenodo.14934743","user_id":"38254","language":[{"iso":"eng"}],"_id":"57108","date_updated":"2025-02-27T06:06:49Z","author":[{"id":"38254","full_name":"Kruse, Stephan","first_name":"Stephan","last_name":"Kruse"},{"first_name":"Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","full_name":"Brecht, Benjamin","id":"27150"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"status":"public","title":"A Quantum Pulse Gate Enhanced Photonic Radar Architecture ","year":"2024"},{"abstract":[{"text":"Ferroelectric materials play a crucial role in a broad range of technologies due to their unique properties that are deeply connected to the pattern and behavior of their ferroelectric (FE) domains. Chief among them, barium titanate (BaTiO3; BTO) sees widespread applications such as in electronics but equally is a ferroelectric model system for fundamental research, e.g., to study the interplay of such FE domains, the domain walls (DWs), and their macroscopic properties, owed to BTO’s multiple and experimentally accessible phase transitions. Here, we employ Second Harmonic Generation Microscopy (SHGM) to in situ investigate the cubic-to-tetragonal (at ∼126°C) and the tetragonal-to-orthorhombic (at ∼5°C) phase transition in single-crystalline BTO via three-dimensional (3D) DW mapping. We demonstrate that SHGM imaging provides the direct visualization of FE domain switching as well as the domain dynamics in 3D, shedding light on the interplay of the domain structure and phase transition. These results allow us to extract the different transition temperatures locally, to unveil the hysteresis behavior, and to determine the type of phase transition at play (first/second order) from the recorded SHGM data. The capabilities of SHGM in uncovering these crucial phenomena can easily be applied to other ferroelectrics to provide new possibilities for in situ engineering of advanced ferroic devices.","lang":"eng"}],"publication":"Journal of Applied Physics","issue":"15","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"type":"journal_article","date_created":"2025-04-02T15:57:11Z","article_type":"original","intvolume":" 136","publication_status":"published","date_updated":"2025-04-02T15:59:55Z","publication_identifier":{"issn":["0021-8979","1089-7550"]},"author":[{"full_name":"Kirbus, Benjamin","first_name":"Benjamin","last_name":"Kirbus"},{"full_name":"Seddon, Samuel D.","last_name":"Seddon","first_name":"Samuel D."},{"last_name":"Kiseleva","first_name":"Iuliia","full_name":"Kiseleva, Iuliia"},{"full_name":"Beyreuther, Elke","first_name":"Elke","last_name":"Beyreuther"},{"first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael","id":"22501"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."}],"title":"Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy","year":"2024","doi":"10.1063/5.0237769","language":[{"iso":"eng"}],"article_number":"154102","main_file_link":[{"open_access":"1","url":" https://doi.org/10.1063/5.0237769"}],"quality_controlled":"1","citation":{"ieee":"B. Kirbus, S. D. Seddon, I. Kiseleva, E. Beyreuther, M. Rüsing, and L. M. Eng, “Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy,” Journal of Applied Physics, vol. 136, no. 15, Art. no. 154102, 2024, doi: 10.1063/5.0237769.","apa":"Kirbus, B., Seddon, S. D., Kiseleva, I., Beyreuther, E., Rüsing, M., & Eng, L. M. (2024). Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy. Journal of Applied Physics, 136(15), Article 154102. https://doi.org/10.1063/5.0237769","chicago":"Kirbus, Benjamin, Samuel D. Seddon, Iuliia Kiseleva, Elke Beyreuther, Michael Rüsing, and Lukas M. Eng. “Probing Ferroelectric Phase Transitions in Barium Titanate Single Crystals via In-Situ Second Harmonic Generation Microscopy.” Journal of Applied Physics 136, no. 15 (2024). https://doi.org/10.1063/5.0237769.","short":"B. Kirbus, S.D. Seddon, I. Kiseleva, E. Beyreuther, M. Rüsing, L.M. Eng, Journal of Applied Physics 136 (2024).","mla":"Kirbus, Benjamin, et al. “Probing Ferroelectric Phase Transitions in Barium Titanate Single Crystals via In-Situ Second Harmonic Generation Microscopy.” Journal of Applied Physics, vol. 136, no. 15, 154102, AIP Publishing, 2024, doi:10.1063/5.0237769.","bibtex":"@article{Kirbus_Seddon_Kiseleva_Beyreuther_Rüsing_Eng_2024, title={Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy}, volume={136}, DOI={10.1063/5.0237769}, number={15154102}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Kirbus, Benjamin and Seddon, Samuel D. and Kiseleva, Iuliia and Beyreuther, Elke and Rüsing, Michael and Eng, Lukas M.}, year={2024} }","ama":"Kirbus B, Seddon SD, Kiseleva I, Beyreuther E, Rüsing M, Eng LM. Probing ferroelectric phase transitions in barium titanate single crystals via in-situ second harmonic generation microscopy. Journal of Applied Physics. 2024;136(15). doi:10.1063/5.0237769"},"oa":"1","status":"public","volume":136,"user_id":"22501","_id":"59269","publisher":"AIP Publishing"},{"status":"public","page":"2300968","_id":"59271","publisher":"Wiley","user_id":"22501","volume":222,"citation":{"mla":"Bernhardt, Felix, et al. “Lattice Dynamics of LiNb(1–x)Ta(x)O3 Solid Solutions: Theory and Experiment.” Physica Status Solidi (a), vol. 222, no. 1, Wiley, 2024, p. 2300968, doi:10.1002/pssa.202300968.","ama":"Bernhardt F, Gharat S, Kapp A, et al. Lattice Dynamics of LiNb(1–x)Ta(x)O3 Solid Solutions: Theory and Experiment. physica status solidi (a). 2024;222(1):2300968. doi:10.1002/pssa.202300968","bibtex":"@article{Bernhardt_Gharat_Kapp_Pfeiffer_Buschbeck_Hempel_Pashkin_Kehr_Rüsing_Sanna_et al._2024, title={Lattice Dynamics of LiNb(1–x)Ta(x)O3 Solid Solutions: Theory and Experiment}, volume={222}, DOI={10.1002/pssa.202300968}, number={1}, journal={physica status solidi (a)}, publisher={Wiley}, author={Bernhardt, Felix and Gharat, Soham and Kapp, Alexander and Pfeiffer, Florian and Buschbeck, Robin and Hempel, Franz and Pashkin, Oleksiy and Kehr, Susanne C. and Rüsing, Michael and Sanna, Simone and et al.}, year={2024}, pages={2300968} }","apa":"Bernhardt, F., Gharat, S., Kapp, A., Pfeiffer, F., Buschbeck, R., Hempel, F., Pashkin, O., Kehr, S. C., Rüsing, M., Sanna, S., & Eng, L. M. (2024). Lattice Dynamics of LiNb(1–x)Ta(x)O3 Solid Solutions: Theory and Experiment. Physica Status Solidi (a), 222(1), 2300968. https://doi.org/10.1002/pssa.202300968","ieee":"F. Bernhardt et al., “Lattice Dynamics of LiNb(1–x)Ta(x)O3 Solid Solutions: Theory and Experiment,” physica status solidi (a), vol. 222, no. 1, p. 2300968, 2024, doi: 10.1002/pssa.202300968.","short":"F. Bernhardt, S. Gharat, A. Kapp, F. Pfeiffer, R. Buschbeck, F. Hempel, O. Pashkin, S.C. Kehr, M. Rüsing, S. Sanna, L.M. Eng, Physica Status Solidi (a) 222 (2024) 2300968.","chicago":"Bernhardt, Felix, Soham Gharat, Alexander Kapp, Florian Pfeiffer, Robin Buschbeck, Franz Hempel, Oleksiy Pashkin, et al. “Lattice Dynamics of LiNb(1–x)Ta(x)O3 Solid Solutions: Theory and Experiment.” Physica Status Solidi (a) 222, no. 1 (2024): 2300968. https://doi.org/10.1002/pssa.202300968."},"oa":"1","title":"Lattice Dynamics of LiNb(1–x)Ta(x)O3 Solid Solutions: Theory and Experiment","year":"2024","publication_identifier":{"issn":["1862-6300","1862-6319"]},"author":[{"full_name":"Bernhardt, Felix","first_name":"Felix","last_name":"Bernhardt"},{"last_name":"Gharat","first_name":"Soham","full_name":"Gharat, Soham"},{"last_name":"Kapp","first_name":"Alexander","full_name":"Kapp, Alexander"},{"first_name":"Florian","last_name":"Pfeiffer","full_name":"Pfeiffer, Florian"},{"full_name":"Buschbeck, Robin","first_name":"Robin","last_name":"Buschbeck"},{"first_name":"Franz","last_name":"Hempel","full_name":"Hempel, Franz"},{"full_name":"Pashkin, Oleksiy","first_name":"Oleksiy","last_name":"Pashkin"},{"full_name":"Kehr, Susanne C.","first_name":"Susanne C.","last_name":"Kehr"},{"last_name":"Rüsing","orcid":"0000-0003-4682-4577","first_name":"Michael","full_name":"Rüsing, Michael","id":"22501"},{"last_name":"Sanna","first_name":"Simone","full_name":"Sanna, Simone"},{"full_name":"Eng, Lukas M.","first_name":"Lukas M.","last_name":"Eng"}],"date_updated":"2025-04-02T16:07:19Z","publication_status":"published","intvolume":" 222","main_file_link":[{"url":"https://doi.org/10.1002/pssa.202300968","open_access":"1"}],"language":[{"iso":"eng"}],"doi":"10.1002/pssa.202300968","issue":"1","publication":"physica status solidi (a)","abstract":[{"lang":"eng","text":"Lithium niobate (LNO) and lithium tantalate (LTO) see widespread use in fundamental research and commercial technologies reaching from electronics over classical optics to integrated quantum communication. The mixed crystal system lithium niobate tantalate (LNT) allows for the dedicate engineering of material properties by combining the advantages of the two parental materials LNO and LTO. Vibrational spectroscopies such as Raman spectroscopy or (Fourier transform) infrared (IR) spectroscopy are vital techniques to provide detailed insight into the material properties, which is central to the analysis and optimization of devices. This work presents a joint experimental–theoretical approach allowing to unambiguously assign the spectral features in the LNT material family through both Raman and IR spectroscopy, as well as providing an in‐depth explanation for the observed scattering efficiencies based on first‐principles calculations. The phononic contribution to the static dielectric tensor is calculated from the experimental and theoretical data using the generalized Lyddane–Sachs–Teller relation and compared with the results of the first‐principles calculations."}],"date_created":"2025-04-02T16:04:58Z","type":"journal_article","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}]},{"intvolume":" 1008","article_type":"original","date_updated":"2025-04-02T16:02:26Z","publication_status":"published","publication_identifier":{"issn":["0925-8388"]},"author":[{"full_name":"Bashir, Umar","first_name":"Umar","last_name":"Bashir"},{"orcid":"0000-0003-4682-4577","last_name":"Rüsing","first_name":"Michael","full_name":"Rüsing, Michael","id":"22501"},{"full_name":"Klimm, Detlef","first_name":"Detlef","last_name":"Klimm"},{"first_name":"Roberts","last_name":"Blukis","full_name":"Blukis, Roberts"},{"first_name":"Boris","last_name":"Koppitz","full_name":"Koppitz, Boris"},{"full_name":"Eng, Lukas M.","first_name":"Lukas M.","last_name":"Eng"},{"full_name":"Bickermann, Matthias","first_name":"Matthias","last_name":"Bickermann"},{"first_name":"Steffen","last_name":"Ganschow","full_name":"Ganschow, Steffen"}],"year":"2024","title":"Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K","doi":"10.1016/j.jallcom.2024.176549","language":[{"iso":"eng"}],"article_number":"176549","abstract":[{"lang":"eng","text":"Lithium niobate tantalate (LiNb1−xTaxO3, LNT) solid solutions offer exciting new possibilities for applications ranging from optics, piezotronics, and electronics beyond the capabilities of the widely used singular compounds of lithium niobate (LiNbO3, LN) or lithium tantalate (LiTaO3, LT). Crystal growth of homogeneous LNT single crystals by the Czochralski method is still challenging. One key aspect of homogeneous growth is the accurate knowledge of thermal conductivity through the crystal boule during the growth, which is central to control the crystal growth. Therefore, the temperature dependent thermal conductivity of pure LN, LT, and LNT solid solutions, as well as of selected doped LN and LT crystals (Mg, Zn) was investigated across the temperature range from 300 to 1300 K. The results that span across the whole composition range can directly be applied for optimizing growth conditions of both LNT solid solutions as well as doped and undoped LN and LT crystals."}],"publication":"Journal of Alloys and Compounds","department":[{"_id":"15"},{"_id":"288"},{"_id":"623"}],"type":"journal_article","date_created":"2025-04-02T16:00:56Z","status":"public","volume":1008,"user_id":"22501","_id":"59270","publisher":"Elsevier BV","quality_controlled":"1","citation":{"short":"U. Bashir, M. Rüsing, D. Klimm, R. Blukis, B. Koppitz, L.M. Eng, M. Bickermann, S. Ganschow, Journal of Alloys and Compounds 1008 (2024).","chicago":"Bashir, Umar, Michael Rüsing, Detlef Klimm, Roberts Blukis, Boris Koppitz, Lukas M. Eng, Matthias Bickermann, and Steffen Ganschow. “Thermal Conductivity in Solid Solutions of Lithium Niobate Tantalate Single Crystals from 300 K up to 1300 K.” Journal of Alloys and Compounds 1008 (2024). https://doi.org/10.1016/j.jallcom.2024.176549.","ieee":"U. Bashir et al., “Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K,” Journal of Alloys and Compounds, vol. 1008, Art. no. 176549, 2024, doi: 10.1016/j.jallcom.2024.176549.","apa":"Bashir, U., Rüsing, M., Klimm, D., Blukis, R., Koppitz, B., Eng, L. M., Bickermann, M., & Ganschow, S. (2024). Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K. Journal of Alloys and Compounds, 1008, Article 176549. https://doi.org/10.1016/j.jallcom.2024.176549","bibtex":"@article{Bashir_Rüsing_Klimm_Blukis_Koppitz_Eng_Bickermann_Ganschow_2024, title={Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K}, volume={1008}, DOI={10.1016/j.jallcom.2024.176549}, number={176549}, journal={Journal of Alloys and Compounds}, publisher={Elsevier BV}, author={Bashir, Umar and Rüsing, Michael and Klimm, Detlef and Blukis, Roberts and Koppitz, Boris and Eng, Lukas M. and Bickermann, Matthias and Ganschow, Steffen}, year={2024} }","ama":"Bashir U, Rüsing M, Klimm D, et al. Thermal conductivity in solid solutions of lithium niobate tantalate single crystals from 300 K up to 1300 K. Journal of Alloys and Compounds. 2024;1008. doi:10.1016/j.jallcom.2024.176549","mla":"Bashir, Umar, et al. “Thermal Conductivity in Solid Solutions of Lithium Niobate Tantalate Single Crystals from 300 K up to 1300 K.” Journal of Alloys and Compounds, vol. 1008, 176549, Elsevier BV, 2024, doi:10.1016/j.jallcom.2024.176549."}},{"citation":{"ama":"Verhoff LM, Pionteck MN, Rüsing M, Fritze H, Eng LM, Sanna S. Two-dimensional electronic conductivity in insulating ferroelectrics: Peculiar properties of domain walls. Physical Review Research. 2024;6(4). doi:10.1103/physrevresearch.6.l042015","bibtex":"@article{Verhoff_Pionteck_Rüsing_Fritze_Eng_Sanna_2024, title={Two-dimensional electronic conductivity in insulating ferroelectrics: Peculiar properties of domain walls}, volume={6}, DOI={10.1103/physrevresearch.6.l042015}, number={4L042015}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Verhoff, Leonard M. and Pionteck, Mike N. and Rüsing, Michael and Fritze, Holger and Eng, Lukas M. and Sanna, Simone}, year={2024} }","mla":"Verhoff, Leonard M., et al. “Two-Dimensional Electronic Conductivity in Insulating Ferroelectrics: Peculiar Properties of Domain Walls.” Physical Review Research, vol. 6, no. 4, L042015, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.l042015.","short":"L.M. Verhoff, M.N. Pionteck, M. Rüsing, H. Fritze, L.M. Eng, S. Sanna, Physical Review Research 6 (2024).","chicago":"Verhoff, Leonard M., Mike N. Pionteck, Michael Rüsing, Holger Fritze, Lukas M. Eng, and Simone Sanna. “Two-Dimensional Electronic Conductivity in Insulating Ferroelectrics: Peculiar Properties of Domain Walls.” Physical Review Research 6, no. 4 (2024). https://doi.org/10.1103/physrevresearch.6.l042015.","apa":"Verhoff, L. M., Pionteck, M. N., Rüsing, M., Fritze, H., Eng, L. M., & Sanna, S. (2024). Two-dimensional electronic conductivity in insulating ferroelectrics: Peculiar properties of domain walls. Physical Review Research, 6(4), Article L042015. https://doi.org/10.1103/physrevresearch.6.l042015","ieee":"L. M. Verhoff, M. N. Pionteck, M. Rüsing, H. Fritze, L. M. Eng, and S. Sanna, “Two-dimensional electronic conductivity in insulating ferroelectrics: Peculiar properties of domain walls,” Physical Review Research, vol. 6, no. 4, Art. no. L042015, 2024, doi: 10.1103/physrevresearch.6.l042015."},"_id":"59272","publisher":"American Physical Society (APS)","volume":6,"user_id":"22501","status":"public","date_created":"2025-04-02T16:08:55Z","department":[{"_id":"623"},{"_id":"288"},{"_id":"15"}],"type":"journal_article","issue":"4","publication":"Physical Review Research","abstract":[{"text":"Ferroelectrics such as LiNbO3 (LN) are wide-band-gap insulators that may show a high local electric conductivity at the domain walls (DWs). The latter are interfaces separating regions of noncollinear polarization, which can be manipulated to build integrated nanoelectronic elements. In the present work, we model different DW types in LN from first principles. Our models reveal the DW morphology and shed light on their electronic properties: A strong band bending is predicted for charged DWs, leading to local metallicity. Defect trapping at the DW may further enhance the electric conductivity.","lang":"eng"}],"language":[{"iso":"eng"}],"main_file_link":[{"url":"https://jlupub.ub.uni-giessen.de/server/api/core/bitstreams/fb2b09e6-c0f8-4209-99a1-79fc81d9b1f9/content"}],"article_number":"L042015","doi":"10.1103/physrevresearch.6.l042015","author":[{"full_name":"Verhoff, Leonard M.","first_name":"Leonard M.","last_name":"Verhoff"},{"last_name":"Pionteck","first_name":"Mike N.","full_name":"Pionteck, Mike N."},{"orcid":"0000-0003-4682-4577","first_name":"Michael","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"},{"full_name":"Fritze, Holger","last_name":"Fritze","first_name":"Holger"},{"last_name":"Eng","first_name":"Lukas M.","full_name":"Eng, Lukas M."},{"first_name":"Simone","last_name":"Sanna","full_name":"Sanna, Simone"}],"publication_identifier":{"issn":["2643-1564"]},"year":"2024","title":"Two-dimensional electronic conductivity in insulating ferroelectrics: Peculiar properties of domain walls","intvolume":" 6","date_updated":"2025-04-02T16:10:59Z","publication_status":"published"}]