--- _id: '63213' abstract: - lang: eng text: '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.' article_number: '033152' article_type: original author: - first_name: Laura Maria full_name: Serino, Laura Maria id: '88242' last_name: Serino - first_name: Giovanni full_name: Chesi, Giovanni last_name: Chesi - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Lorenzo full_name: Maccone, Lorenzo last_name: Maccone - first_name: Chiara full_name: Macchiavello, Chiara last_name: Macchiavello - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: 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. Physical Review Research. 2025;7(3). doi:10.1103/v24q-sl6n' apa: 'Serino, L. M., Chesi, G., Brecht, B., Maccone, L., Macchiavello, C., & Silberhorn, C. (2025). Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations. Physical Review Research, 7(3), Article 033152. https://doi.org/10.1103/v24q-sl6n' 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={10.1103/v24q-sl6n}, 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} }' 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.” Physical Review Research 7, no. 3 (2025). https://doi.org/10.1103/v24q-sl6n.' 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,” Physical Review Research, vol. 7, no. 3, Art. no. 033152, 2025, doi: 10.1103/v24q-sl6n.' mla: 'Serino, Laura Maria, et al. “Complementarity-Based Complementarity: The Choice of Mutually Unbiased Observables Shapes Quantum Uncertainty Relations.” Physical Review Research, vol. 7, no. 3, 033152, American Physical Society (APS), 2025, doi:10.1103/v24q-sl6n.' short: L.M. Serino, G. Chesi, B. Brecht, L. Maccone, C. Macchiavello, C. Silberhorn, Physical Review Research 7 (2025). date_created: 2025-12-18T16:04:45Z date_updated: 2025-12-18T16:05:45Z department: - _id: '15' - _id: '623' doi: 10.1103/v24q-sl6n intvolume: ' 7' issue: '3' language: - iso: eng publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: 'Complementarity-based complementarity: The choice of mutually unbiased observables shapes quantum uncertainty relations' type: journal_article user_id: '27150' volume: 7 year: '2025' ... --- _id: '63215' abstract: - lang: eng text: "Abstract\r\n 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." article_number: '025024' author: - first_name: Laura Maria full_name: Serino, Laura Maria id: '88242' last_name: Serino - first_name: Markus full_name: Rambach, Markus last_name: Rambach - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Jacquiline full_name: Romero, Jacquiline last_name: Romero - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: ama: Serino LM, Rambach M, Brecht B, Romero J, Silberhorn C. Self-guided tomography of time-frequency qudits. Quantum Science and Technology. 2025;10(2). doi:10.1088/2058-9565/adb0ea apa: Serino, L. M., Rambach, M., Brecht, B., Romero, J., & Silberhorn, C. (2025). Self-guided tomography of time-frequency qudits. Quantum Science and Technology, 10(2), Article 025024. https://doi.org/10.1088/2058-9565/adb0ea bibtex: '@article{Serino_Rambach_Brecht_Romero_Silberhorn_2025, title={Self-guided tomography of time-frequency qudits}, volume={10}, DOI={10.1088/2058-9565/adb0ea}, 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} }' chicago: Serino, Laura Maria, Markus Rambach, Benjamin Brecht, Jacquiline Romero, and Christine Silberhorn. “Self-Guided Tomography of Time-Frequency Qudits.” Quantum Science and Technology 10, no. 2 (2025). https://doi.org/10.1088/2058-9565/adb0ea. ieee: 'L. M. Serino, M. Rambach, B. Brecht, J. Romero, and C. Silberhorn, “Self-guided tomography of time-frequency qudits,” Quantum Science and Technology, vol. 10, no. 2, Art. no. 025024, 2025, doi: 10.1088/2058-9565/adb0ea.' mla: Serino, Laura Maria, et al. “Self-Guided Tomography of Time-Frequency Qudits.” Quantum Science and Technology, vol. 10, no. 2, 025024, IOP Publishing, 2025, doi:10.1088/2058-9565/adb0ea. short: L.M. Serino, M. Rambach, B. Brecht, J. Romero, C. Silberhorn, Quantum Science and Technology 10 (2025). date_created: 2025-12-18T16:07:11Z date_updated: 2025-12-18T16:07:35Z department: - _id: '15' - _id: '623' doi: 10.1088/2058-9565/adb0ea intvolume: ' 10' issue: '2' language: - iso: eng publication: Quantum Science and Technology publication_identifier: issn: - 2058-9565 publication_status: published publisher: IOP Publishing status: public title: Self-guided tomography of time-frequency qudits type: journal_article user_id: '27150' volume: 10 year: '2025' ... --- _id: '63091' abstract: - lang: eng 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. article_number: '52729' article_type: original author: - first_name: Silia full_name: Babel, Silia id: '63231' last_name: Babel orcid: https://orcid.org/0000-0002-1568-2580 - first_name: Laura full_name: Bollmers, Laura id: '61375' last_name: Bollmers - first_name: Franz full_name: Roeder, Franz id: '88149' last_name: Roeder - first_name: Werner full_name: Ridder, Werner id: '63574' last_name: Ridder - first_name: Christian full_name: Golla, Christian id: '40420' last_name: Golla - first_name: Ronja full_name: Köthemann, Ronja last_name: Köthemann - first_name: Bernhard full_name: Reineke, Bernhard id: '29821' last_name: Reineke - first_name: Harald full_name: Herrmann, Harald id: '216' last_name: Herrmann - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Laura full_name: Padberg, Laura id: '40300' last_name: Padberg - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: 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. Optics Express. 2025;33(25). doi:10.1364/oe.571605 apa: Babel, S., Bollmers, L., Roeder, F., Ridder, W., Golla, C., Köthemann, R., Reineke, B., Herrmann, H., Brecht, B., Eigner, C., Padberg, L., & Silberhorn, C. (2025). Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths. Optics Express, 33(25), Article 52729. https://doi.org/10.1364/oe.571605 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={10.1364/oe.571605}, 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} }' 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.” Optics Express 33, no. 25 (2025). https://doi.org/10.1364/oe.571605. ieee: 'S. Babel et al., “Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths,” Optics Express, vol. 33, no. 25, Art. no. 52729, 2025, doi: 10.1364/oe.571605.' mla: Babel, Silia, et al. “Ultrabright, Two-Color Photon Pair Source Based on Thin-Film Lithium Niobate for Bridging Visible and Telecom Wavelengths.” Optics Express, vol. 33, no. 25, 52729, Optica Publishing Group, 2025, doi:10.1364/oe.571605. 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). date_created: 2025-12-15T07:20:36Z date_updated: 2026-01-07T11:28:35Z department: - _id: '288' - _id: '623' doi: 10.1364/oe.571605 intvolume: ' 33' issue: '25' language: - iso: eng main_file_link: - open_access: '1' url: https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729 oa: '1' publication: Optics Express publication_identifier: issn: - 1094-4087 publication_status: published publisher: Optica Publishing Group status: public title: Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths type: journal_article user_id: '63231' volume: 33 year: '2025' ... --- _id: '62713' 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. article_type: original author: - first_name: Laura full_name: Bollmers, Laura id: '61375' last_name: Bollmers - first_name: Noah full_name: Spiegelberg, Noah last_name: Spiegelberg - first_name: Michael full_name: Rüsing, Michael id: '22501' last_name: Rüsing orcid: 0000-0003-4682-4577 - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Laura full_name: Padberg, Laura id: '40300' last_name: Padberg - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: 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. Nanophotonics. 2025;14:4761. doi:10.1515/nanoph-2025-0461 apa: Bollmers, L., Spiegelberg, N., Rüsing, M., Eigner, C., Padberg, L., & Silberhorn, C. (2025). Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate. Nanophotonics, 14, 4761. https://doi.org/10.1515/nanoph-2025-0461 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={10.1515/nanoph-2025-0461}, 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} }' 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.” Nanophotonics 14 (2025): 4761. https://doi.org/10.1515/nanoph-2025-0461.' 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,” Nanophotonics, vol. 14, p. 4761, 2025, doi: 10.1515/nanoph-2025-0461.' mla: Bollmers, Laura, et al. “Segmented Finger Electrodes to Optimize Ultra-Long Continuous Wafer-Scale Periodic Poling in Thin-Film Lithium Niobate.” Nanophotonics, vol. 14, Walter de Gruyter GmbH, 2025, p. 4761, doi:10.1515/nanoph-2025-0461. short: L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, C. Silberhorn, Nanophotonics 14 (2025) 4761. date_created: 2025-12-01T08:45:07Z date_updated: 2026-01-07T12:06:29Z department: - _id: '15' - _id: '288' - _id: '623' doi: 10.1515/nanoph-2025-0461 intvolume: ' 14' language: - iso: eng main_file_link: - open_access: '1' url: https://doi.org/10.1515/nanoph-2025-0461 oa: '1' page: '4761' publication: Nanophotonics publication_identifier: issn: - 2192-8606 - 2192-8614 publication_status: published publisher: Walter de Gruyter GmbH quality_controlled: '1' status: public title: Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate type: journal_article user_id: '22501' volume: 14 year: '2025' ... --- _id: '59069' abstract: - lang: eng text: 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 LiNbO3. 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 <0.4dBcm and a SHG conversion efficiency of about 81%Wcm2. Harnessing a type-0 SPDC process to generate 1550 nm photons, we obtain a SPDC brightness of 3⋅1051s⋅mW⋅nm, with a heralding efficiency of ηh=45% (ηh,wg=77.5% for the waveguide itself excluded setup losses) and a heralded second-order correlation function of gh2(0)<0.003 at low pump powers. article_number: '593' article_type: original author: - first_name: Christian full_name: Kießler, Christian id: '44252' last_name: Kießler - first_name: Michelle full_name: Kirsch, Michelle id: '69553' last_name: Kirsch - first_name: Sebastian full_name: Lengeling, Sebastian id: '44373' last_name: Lengeling - first_name: Harald full_name: Herrmann, Harald id: '216' last_name: Herrmann - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: ama: Kießler C, Kirsch M, Lengeling S, Herrmann H, Silberhorn C. SPDC single-photon source in Ti-indiffused diced ridge LiNbO3 waveguides. Optics Continuum. 2025;4(3). doi:10.1364/optcon.557439 apa: Kießler, C., Kirsch, M., Lengeling, S., Herrmann, H., & Silberhorn, C. (2025). SPDC single-photon source in Ti-indiffused diced ridge LiNbO3 waveguides. Optics Continuum, 4(3), Article 593. https://doi.org/10.1364/optcon.557439 bibtex: '@article{Kießler_Kirsch_Lengeling_Herrmann_Silberhorn_2025, title={SPDC single-photon source in Ti-indiffused diced ridge LiNbO3 waveguides}, volume={4}, DOI={10.1364/optcon.557439}, 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} }' chicago: Kießler, Christian, Michelle Kirsch, Sebastian Lengeling, Harald Herrmann, and Christine Silberhorn. “SPDC Single-Photon Source in Ti-Indiffused Diced Ridge LiNbO3 Waveguides.” Optics Continuum 4, no. 3 (2025). https://doi.org/10.1364/optcon.557439. ieee: 'C. Kießler, M. Kirsch, S. Lengeling, H. Herrmann, and C. Silberhorn, “SPDC single-photon source in Ti-indiffused diced ridge LiNbO3 waveguides,” Optics Continuum, vol. 4, no. 3, Art. no. 593, 2025, doi: 10.1364/optcon.557439.' mla: Kießler, Christian, et al. “SPDC Single-Photon Source in Ti-Indiffused Diced Ridge LiNbO3 Waveguides.” Optics Continuum, vol. 4, no. 3, 593, Optica Publishing Group, 2025, doi:10.1364/optcon.557439. short: C. Kießler, M. Kirsch, S. Lengeling, H. Herrmann, C. Silberhorn, Optics Continuum 4 (2025). date_created: 2025-03-19T10:56:04Z date_updated: 2025-03-19T16:03:25Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1364/optcon.557439 intvolume: ' 4' issue: '3' language: - iso: eng publication: Optics Continuum publication_identifier: issn: - 2770-0208 publication_status: published publisher: Optica Publishing Group status: public title: SPDC single-photon source in Ti-indiffused diced ridge LiNbO3 waveguides type: journal_article user_id: '216' volume: 4 year: '2025' ... --- _id: '59276' abstract: - lang: eng 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 x or y crystallographic axes is observed by the appearance of new nonlinear optical tensor elements within the strained crystals. article_number: '064109' author: - first_name: Mike N. full_name: Pionteck, Mike N. last_name: Pionteck - first_name: Matthias full_name: Roeper, Matthias last_name: Roeper - first_name: Boris full_name: Koppitz, Boris last_name: Koppitz - first_name: Samuel D. full_name: Seddon, Samuel D. last_name: Seddon - first_name: Michael full_name: Rüsing, Michael id: '22501' last_name: Rüsing orcid: 0000-0003-4682-4577 - first_name: Laura full_name: Padberg, Laura id: '40300' last_name: Padberg - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Simone full_name: Sanna, Simone last_name: Sanna - first_name: Lukas M. full_name: Eng, Lukas M. last_name: Eng citation: ama: Pionteck MN, Roeper M, Koppitz B, et al. Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films. Physical Review B. 2025;111(6). doi:10.1103/physrevb.111.064109 apa: Pionteck, M. N., Roeper, M., Koppitz, B., Seddon, S. D., Rüsing, M., Padberg, L., Eigner, C., Silberhorn, C., Sanna, S., & Eng, L. M. (2025). Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films. Physical Review B, 111(6), Article 064109. https://doi.org/10.1103/physrevb.111.064109 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={10.1103/physrevb.111.064109}, 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} }' 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.” Physical Review B 111, no. 6 (2025). https://doi.org/10.1103/physrevb.111.064109. ieee: 'M. N. Pionteck et al., “Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films,” Physical Review B, vol. 111, no. 6, Art. no. 064109, 2025, doi: 10.1103/physrevb.111.064109.' mla: Pionteck, Mike N., et al. “Second-Order Nonlinear Piezo-Optic Properties of Single Crystal Lithium Niobate Thin Films.” Physical Review B, vol. 111, no. 6, 064109, American Physical Society (APS), 2025, doi:10.1103/physrevb.111.064109. 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). date_created: 2025-04-02T16:21:47Z date_updated: 2025-04-02T16:24:47Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1103/physrevb.111.064109 intvolume: ' 111' issue: '6' language: - iso: eng publication: Physical Review B publication_identifier: issn: - 2469-9950 - 2469-9969 publication_status: published publisher: American Physical Society (APS) quality_controlled: '1' status: public title: Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films type: journal_article user_id: '22501' volume: 111 year: '2025' ... --- _id: '60136' abstract: - lang: eng text: Modulation conditioned on measurements on entangled photonic quantum states is a cornerstone technology of optical quantum information processing. Performing this task with low latency requires combining single-photon-level detectors with both electronic logic processing and optical modulation in close proximity. Here, we demonstrate low-latency feedforward using a quasi-photon-number-resolved measurement on a quantum light source. Specifically, we use a multipixel superconducting nanowire single-photon detector, amplifier, logic, and an integrated electro-optic modulator in situ below 4 K. We modulate the signal mode of a spontaneous parametric down-conversion source, conditional on a photon-number measurement of the idler mode, with a total latency of (23±3)ns. Furthermore, we investigate the resulting change in the photon statistics. This represents an important benchmark for the fastest quantum photonic feedforward experiments comprising measurement, amplification, logic, and modulation. This has direct applications in quantum computing, communication, and simulation protocols. article_number: '720' author: - first_name: Frederik full_name: Thiele, Frederik id: '50819' last_name: Thiele orcid: 0000-0003-0663-5587 - first_name: Niklas full_name: Lamberty, Niklas id: '75307' last_name: Lamberty - first_name: Thomas full_name: Hummel, Thomas id: '83846' last_name: Hummel orcid: 0000-0001-8627-2119 - first_name: Nina Amelie full_name: Lange, Nina Amelie id: '56843' last_name: Lange orcid: 0000-0001-6624-7098 - first_name: Lorenzo Manuel full_name: Procopio Peña, Lorenzo Manuel id: '105816' last_name: Procopio Peña - first_name: Aishi full_name: Barua, Aishi id: '104502' last_name: Barua - first_name: Sebastian full_name: Lengeling, Sebastian id: '44373' last_name: Lengeling - first_name: Viktor full_name: Quiring, Viktor last_name: Quiring - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley citation: ama: Thiele F, Lamberty N, Hummel T, et al. Cryogenic feedforward of a photonic quantum state. Optica. 2025;12(5). doi:10.1364/optica.551287 apa: Thiele, F., Lamberty, N., Hummel, T., Lange, N. A., Procopio Peña, L. M., Barua, A., Lengeling, S., Quiring, V., Eigner, C., Silberhorn, C., & Bartley, T. (2025). Cryogenic feedforward of a photonic quantum state. Optica, 12(5), Article 720. https://doi.org/10.1364/optica.551287 bibtex: '@article{Thiele_Lamberty_Hummel_Lange_Procopio Peña_Barua_Lengeling_Quiring_Eigner_Silberhorn_et al._2025, title={Cryogenic feedforward of a photonic quantum state}, volume={12}, DOI={10.1364/optica.551287}, number={5720}, journal={Optica}, publisher={Optica Publishing Group}, author={Thiele, Frederik and Lamberty, Niklas and Hummel, Thomas and Lange, Nina Amelie and Procopio Peña, Lorenzo Manuel and Barua, Aishi and Lengeling, Sebastian and Quiring, Viktor and Eigner, Christof and Silberhorn, Christine and et al.}, year={2025} }' chicago: Thiele, Frederik, Niklas Lamberty, Thomas Hummel, Nina Amelie Lange, Lorenzo Manuel Procopio Peña, Aishi Barua, Sebastian Lengeling, et al. “Cryogenic Feedforward of a Photonic Quantum State.” Optica 12, no. 5 (2025). https://doi.org/10.1364/optica.551287. ieee: 'F. Thiele et al., “Cryogenic feedforward of a photonic quantum state,” Optica, vol. 12, no. 5, Art. no. 720, 2025, doi: 10.1364/optica.551287.' mla: Thiele, Frederik, et al. “Cryogenic Feedforward of a Photonic Quantum State.” Optica, vol. 12, no. 5, 720, Optica Publishing Group, 2025, doi:10.1364/optica.551287. short: F. Thiele, N. Lamberty, T. Hummel, N.A. Lange, L.M. Procopio Peña, A. Barua, S. Lengeling, V. Quiring, C. Eigner, C. Silberhorn, T. Bartley, Optica 12 (2025). date_created: 2025-06-04T18:34:16Z date_updated: 2025-06-12T09:56:47Z doi: 10.1364/optica.551287 intvolume: ' 12' issue: '5' language: - iso: eng publication: Optica publication_identifier: issn: - 2334-2536 publication_status: published publisher: Optica Publishing Group status: public title: Cryogenic feedforward of a photonic quantum state type: journal_article user_id: '56843' volume: 12 year: '2025' ... --- _id: '60587' author: - first_name: Timon full_name: Schapeler, Timon id: '55629' last_name: Schapeler orcid: 0000-0001-7652-1716 - first_name: Fabian full_name: Schlue, Fabian id: '63579' last_name: Schlue - first_name: Michael full_name: Stefszky, Michael id: '42777' last_name: Stefszky - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley citation: 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. Advanced Photon Counting Techniques XIX. SPIE; 2025. doi:10.1117/12.3054905' apa: Schapeler, T., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., & Bartley, T. (2025). Optimizing photon-number resolution with superconducting nanowire multi-photon detectors. In M. A. Itzler, K. A. McIntosh, & J. C. Bienfang (Eds.), Advanced Photon Counting Techniques XIX. SPIE. https://doi.org/10.1117/12.3054905 bibtex: '@inproceedings{Schapeler_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2025, title={Optimizing photon-number resolution with superconducting nanowire multi-photon detectors}, DOI={10.1117/12.3054905}, 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} }' 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 Advanced Photon Counting Techniques XIX, edited by Mark A. Itzler, K. Alex McIntosh, and Joshua C. Bienfang. SPIE, 2025. https://doi.org/10.1117/12.3054905. 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 Advanced Photon Counting Techniques XIX, 2025, doi: 10.1117/12.3054905.' mla: Schapeler, Timon, et al. “Optimizing Photon-Number Resolution with Superconducting Nanowire Multi-Photon Detectors.” Advanced Photon Counting Techniques XIX, edited by Mark A. Itzler et al., SPIE, 2025, doi:10.1117/12.3054905. 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.' date_created: 2025-07-11T09:18:09Z date_updated: 2025-07-11T09:22:11Z department: - _id: '15' - _id: '623' doi: 10.1117/12.3054905 editor: - first_name: Mark A. full_name: Itzler, Mark A. last_name: Itzler - first_name: K. Alex full_name: McIntosh, K. Alex last_name: McIntosh - first_name: Joshua C. full_name: Bienfang, Joshua C. last_name: Bienfang language: - iso: eng project: - _id: '239' call_identifier: ERC grant_number: '101042399' name: 'QuESADILLA: ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications' - _id: '191' grant_number: 13N16103 name: 'PhoQuant--QCTest: PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform' publication: Advanced Photon Counting Techniques XIX publication_status: published publisher: SPIE status: public title: Optimizing photon-number resolution with superconducting nanowire multi-photon detectors type: conference user_id: '55629' year: '2025' ... --- _id: '61110' abstract: - lang: eng text: 'By analyzing the physics of multi-photon absorption in superconducting nanowire single-photon detectors (SNSPDs), we identify physical components of jitter. From this, we formulate a quantitative physical model of the multi-photon detector response that combines the local detection mechanism and local fluctuations (hotspot formation and intrinsic jitter) with the thermoelectric dynamics of resistive domains. Our model provides an excellent description of the arrival-time histogram of a commercial SNSPD across several orders of magnitude, both in arrival-time probability and across mean photon number. This is achieved with just three fitting parameters: the scaling of the mean arrival time of voltage response pulses, as well as the Gaussian and exponential jitter components. Our findings have important implications for photon-number-resolving detector design, as well as applications requiring low jitter, such as light detection and ranging (LIDAR).' article_number: '086113' article_type: original author: - first_name: Mariia full_name: Sidorova, Mariia last_name: Sidorova - first_name: Timon full_name: Schapeler, Timon id: '55629' last_name: Schapeler orcid: 0000-0001-7652-1716 - first_name: Alexej D. full_name: Semenov, Alexej D. last_name: Semenov - first_name: Fabian full_name: Schlue, Fabian id: '63579' last_name: Schlue - first_name: Michael full_name: Stefszky, Michael id: '42777' last_name: Stefszky - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley citation: ama: Sidorova M, Schapeler T, Semenov AD, et al. Jitter in photon-number-resolved detection by superconducting nanowires. APL Photonics. 2025;10(8). doi:10.1063/5.0273752 apa: Sidorova, M., Schapeler, T., Semenov, A. D., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., & Bartley, T. (2025). Jitter in photon-number-resolved detection by superconducting nanowires. APL Photonics, 10(8), Article 086113. https://doi.org/10.1063/5.0273752 bibtex: '@article{Sidorova_Schapeler_Semenov_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2025, title={Jitter in photon-number-resolved detection by superconducting nanowires}, volume={10}, DOI={10.1063/5.0273752}, number={8086113}, journal={APL Photonics}, publisher={AIP Publishing}, author={Sidorova, Mariia and Schapeler, Timon and Semenov, Alexej D. and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Bartley, Tim}, year={2025} }' chicago: Sidorova, Mariia, Timon Schapeler, Alexej D. Semenov, Fabian Schlue, Michael Stefszky, Benjamin Brecht, Christine Silberhorn, and Tim Bartley. “Jitter in Photon-Number-Resolved Detection by Superconducting Nanowires.” APL Photonics 10, no. 8 (2025). https://doi.org/10.1063/5.0273752. ieee: 'M. Sidorova et al., “Jitter in photon-number-resolved detection by superconducting nanowires,” APL Photonics, vol. 10, no. 8, Art. no. 086113, 2025, doi: 10.1063/5.0273752.' mla: Sidorova, Mariia, et al. “Jitter in Photon-Number-Resolved Detection by Superconducting Nanowires.” APL Photonics, vol. 10, no. 8, 086113, AIP Publishing, 2025, doi:10.1063/5.0273752. short: M. Sidorova, T. Schapeler, A.D. Semenov, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley, APL Photonics 10 (2025). date_created: 2025-09-01T11:12:19Z date_updated: 2025-09-02T10:47:08Z department: - _id: '623' - _id: '15' doi: 10.1063/5.0273752 external_id: arxiv: - arXiv:2503.17146 intvolume: ' 10' issue: '8' keyword: - Jitter - PNR - SNSPD language: - iso: eng main_file_link: - open_access: '1' oa: '1' project: - _id: '191' name: 'PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform' - _id: '239' name: 'ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications' publication: APL Photonics publication_identifier: issn: - 2378-0967 publication_status: published publisher: AIP Publishing status: public title: Jitter in photon-number-resolved detection by superconducting nanowires type: journal_article user_id: '55629' volume: 10 year: '2025' ... --- _id: '60566' article_number: '074402' author: - first_name: Adriana full_name: Bocchini, Adriana id: '58349' last_name: Bocchini orcid: 0000-0002-2134-3075 - first_name: Michael full_name: Rüsing, Michael id: '22501' last_name: Rüsing orcid: 0000-0003-4682-4577 - first_name: Laura full_name: Bollmers, Laura id: '61375' last_name: Bollmers - first_name: Sebastian full_name: Lengeling, Sebastian id: '44373' last_name: Lengeling - first_name: Philipp full_name: Mues, Philipp id: '49772' last_name: Mues orcid: 0000-0003-0643-7636 - first_name: Laura full_name: Padberg, Laura id: '40300' last_name: Padberg - first_name: Uwe full_name: Gerstmann, Uwe id: '171' last_name: Gerstmann orcid: 0000-0002-4476-223X - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Wolf Gero full_name: Schmidt, Wolf Gero id: '468' last_name: Schmidt orcid: 0000-0002-2717-5076 citation: ama: 'Bocchini A, Rüsing M, Bollmers L, et al. Mg dopants in lithium niobate: Defect models and impact on domain inversion. Physical Review Materials. 2025;9(7). doi:10.1103/5wz1-bjyr' apa: 'Bocchini, A., Rüsing, M., Bollmers, L., Lengeling, S., Mues, P., Padberg, L., Gerstmann, U., Silberhorn, C., Eigner, C., & Schmidt, W. G. (2025). Mg dopants in lithium niobate: Defect models and impact on domain inversion. Physical Review Materials, 9(7), Article 074402. https://doi.org/10.1103/5wz1-bjyr' bibtex: '@article{Bocchini_Rüsing_Bollmers_Lengeling_Mues_Padberg_Gerstmann_Silberhorn_Eigner_Schmidt_2025, title={Mg dopants in lithium niobate: Defect models and impact on domain inversion}, volume={9}, DOI={10.1103/5wz1-bjyr}, number={7074402}, journal={Physical Review Materials}, publisher={American Physical Society (APS)}, author={Bocchini, Adriana and Rüsing, Michael and Bollmers, Laura and Lengeling, Sebastian and Mues, Philipp and Padberg, Laura and Gerstmann, Uwe and Silberhorn, Christine and Eigner, Christof and Schmidt, Wolf Gero}, year={2025} }' chicago: 'Bocchini, Adriana, Michael Rüsing, Laura Bollmers, Sebastian Lengeling, Philipp Mues, Laura Padberg, Uwe Gerstmann, Christine Silberhorn, Christof Eigner, and Wolf Gero Schmidt. “Mg Dopants in Lithium Niobate: Defect Models and Impact on Domain Inversion.” Physical Review Materials 9, no. 7 (2025). https://doi.org/10.1103/5wz1-bjyr.' ieee: 'A. Bocchini et al., “Mg dopants in lithium niobate: Defect models and impact on domain inversion,” Physical Review Materials, vol. 9, no. 7, Art. no. 074402, 2025, doi: 10.1103/5wz1-bjyr.' mla: 'Bocchini, Adriana, et al. “Mg Dopants in Lithium Niobate: Defect Models and Impact on Domain Inversion.” Physical Review Materials, vol. 9, no. 7, 074402, American Physical Society (APS), 2025, doi:10.1103/5wz1-bjyr.' short: A. Bocchini, M. Rüsing, L. Bollmers, S. Lengeling, P. Mues, L. Padberg, U. Gerstmann, C. Silberhorn, C. Eigner, W.G. Schmidt, Physical Review Materials 9 (2025). date_created: 2025-07-09T09:13:24Z date_updated: 2026-03-17T17:50:06Z ddc: - '530' department: - _id: '15' - _id: '623' - _id: '295' - _id: '790' - _id: '288' - _id: '230' - _id: '429' - _id: '35' - _id: '170' - _id: '169' - _id: '27' doi: 10.1103/5wz1-bjyr file: - access_level: open_access content_type: application/pdf creator: adrianab date_created: 2025-07-09T09:18:45Z date_updated: 2025-07-10T06:43:34Z file_id: '60567' file_name: Mg_dopants_LN_PRM.pdf file_size: 4175120 relation: main_file file_date_updated: 2025-07-10T06:43:34Z has_accepted_license: '1' intvolume: ' 9' issue: '7' language: - iso: eng main_file_link: - open_access: '1' url: https://link.aps.org/doi/10.1103/5wz1-bjyr oa: '1' project: - _id: '52' name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing' - _id: '53' name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '55' name: 'TRR 142 - B: TRR 142 - Project Area B' - _id: '54' name: 'TRR 142 - A: TRR 142 - Project Area A' - _id: '168' name: 'TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)' - _id: '166' name: 'TRR 142 - A11: TRR 142 - Subproject A11' publication: Physical Review Materials publication_identifier: issn: - 2475-9953 publication_status: published publisher: American Physical Society (APS) status: public title: 'Mg dopants in lithium niobate: Defect models and impact on domain inversion' type: journal_article user_id: '22501' volume: 9 year: '2025' ... --- _id: '63733' abstract: - lang: eng text: 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. article_number: '023703' author: - first_name: Dmitri B. full_name: Horoshko, Dmitri B. last_name: Horoshko - first_name: Shivang full_name: Srivastava, Shivang last_name: Srivastava - first_name: Filip Maksymilian full_name: Sośnicki, Filip Maksymilian id: '106751' last_name: Sośnicki orcid: 0000-0002-2465-4645 - first_name: Michał full_name: Mikołajczyk, Michał last_name: Mikołajczyk - first_name: Michał full_name: Karpiński, Michał last_name: Karpiński - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Mikhail I. full_name: Kolobov, Mikhail I. last_name: Kolobov citation: ama: Horoshko DB, Srivastava S, Sośnicki FM, et al. Time-resolved second-order autocorrelation function of parametric down-conversion. Physical Review A. 2025;112(2). doi:10.1103/7ckm-tm3r apa: Horoshko, D. B., Srivastava, S., Sośnicki, F. M., Mikołajczyk, M., Karpiński, M., Brecht, B., & Kolobov, M. I. (2025). Time-resolved second-order autocorrelation function of parametric down-conversion. Physical Review A, 112(2), Article 023703. https://doi.org/10.1103/7ckm-tm3r bibtex: '@article{Horoshko_Srivastava_Sośnicki_Mikołajczyk_Karpiński_Brecht_Kolobov_2025, title={Time-resolved second-order autocorrelation function of parametric down-conversion}, volume={112}, DOI={10.1103/7ckm-tm3r}, number={2023703}, journal={Physical Review A}, publisher={American Physical Society (APS)}, author={Horoshko, Dmitri B. and Srivastava, Shivang and Sośnicki, Filip Maksymilian and Mikołajczyk, Michał and Karpiński, Michał and Brecht, Benjamin and Kolobov, Mikhail I.}, year={2025} }' chicago: Horoshko, Dmitri B., Shivang Srivastava, Filip Maksymilian Sośnicki, Michał Mikołajczyk, Michał Karpiński, Benjamin Brecht, and Mikhail I. Kolobov. “Time-Resolved Second-Order Autocorrelation Function of Parametric down-Conversion.” Physical Review A 112, no. 2 (2025). https://doi.org/10.1103/7ckm-tm3r. ieee: 'D. B. Horoshko et al., “Time-resolved second-order autocorrelation function of parametric down-conversion,” Physical Review A, vol. 112, no. 2, Art. no. 023703, 2025, doi: 10.1103/7ckm-tm3r.' mla: Horoshko, Dmitri B., et al. “Time-Resolved Second-Order Autocorrelation Function of Parametric down-Conversion.” Physical Review A, vol. 112, no. 2, 023703, American Physical Society (APS), 2025, doi:10.1103/7ckm-tm3r. short: D.B. Horoshko, S. Srivastava, F.M. Sośnicki, M. Mikołajczyk, M. Karpiński, B. Brecht, M.I. Kolobov, Physical Review A 112 (2025). date_created: 2026-01-26T14:28:22Z date_updated: 2026-03-25T07:59:53Z department: - _id: '623' - _id: '15' - _id: '288' doi: 10.1103/7ckm-tm3r intvolume: ' 112' issue: '2' language: - iso: eng publication: Physical Review A publication_identifier: issn: - 2469-9926 - 2469-9934 publication_status: published publisher: American Physical Society (APS) status: public title: Time-resolved second-order autocorrelation function of parametric down-conversion type: journal_article user_id: '27150' volume: 112 year: '2025' ... --- _id: '59895' abstract: - lang: eng text: The generation of optically broadband Nyquist pulse sequences using an integrated Mach-Zehnder modulator (MZM) in a thin-film lithium-niobate (TFLN) platform with repetition rates of 5 to 32 GHz and optical bandwidths of up to 160 GHz is demonstrated. Nyquist pulse sequences with high optical bandwidth can be used as synchronization and control signals in quantum sources based on photon pair generation. author: - first_name: Christian full_name: Kress, Christian id: '13256' last_name: Kress orcid: 0000-0002-4403-2237 - first_name: Martin Miroslavov full_name: Mihaylov, Martin Miroslavov id: '42449' last_name: Mihaylov - first_name: Tobias full_name: Schwabe, Tobias id: '39217' last_name: Schwabe - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: J. Christoph full_name: Scheytt, J. Christoph id: '37144' last_name: Scheytt orcid: '0000-0002-5950-6618 ' citation: ama: 'Kress C, Mihaylov MM, Schwabe T, Silberhorn C, Scheytt JC. Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source. In: PIERS Proceedings . PhotonIcs and Electromagnetics Research Symposium (PIERS). doi:10.1109/PIERS-Spring66516.2025.11276835' apa: Kress, C., Mihaylov, M. M., Schwabe, T., Silberhorn, C., & Scheytt, J. C. (n.d.). Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source. PIERS Proceedings . PhotonIcs and Electromagnetics Research Symposium (PIERS), Abu Dhabi. https://doi.org/10.1109/PIERS-Spring66516.2025.11276835 bibtex: '@inproceedings{Kress_Mihaylov_Schwabe_Silberhorn_Scheytt, title={Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source}, DOI={10.1109/PIERS-Spring66516.2025.11276835}, booktitle={PIERS Proceedings }, publisher={PhotonIcs and Electromagnetics Research Symposium (PIERS)}, author={Kress, Christian and Mihaylov, Martin Miroslavov and Schwabe, Tobias and Silberhorn, Christine and Scheytt, J. Christoph} }' chicago: Kress, Christian, Martin Miroslavov Mihaylov, Tobias Schwabe, Christine Silberhorn, and J. Christoph Scheytt. “Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source.” In PIERS Proceedings . PhotonIcs and Electromagnetics Research Symposium (PIERS), n.d. https://doi.org/10.1109/PIERS-Spring66516.2025.11276835. ieee: 'C. Kress, M. M. Mihaylov, T. Schwabe, C. Silberhorn, and J. C. Scheytt, “Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source,” presented at the PhotonIcs and Electromagnetics Research Symposium (PIERS), Abu Dhabi, doi: 10.1109/PIERS-Spring66516.2025.11276835.' mla: Kress, Christian, et al. “Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source.” PIERS Proceedings , PhotonIcs and Electromagnetics Research Symposium (PIERS), doi:10.1109/PIERS-Spring66516.2025.11276835. short: 'C. Kress, M.M. Mihaylov, T. Schwabe, C. Silberhorn, J.C. Scheytt, in: PIERS Proceedings , PhotonIcs and Electromagnetics Research Symposium (PIERS), n.d.' conference: end_date: 2025-05-09 location: Abu Dhabi name: PhotonIcs and Electromagnetics Research Symposium (PIERS) start_date: 2025-05-03 date_created: 2025-05-14T09:59:50Z date_updated: 2026-04-29T14:27:08Z department: - _id: '58' - _id: '623' doi: 10.1109/PIERS-Spring66516.2025.11276835 language: - iso: eng project: - _id: '302' name: 'PONyDAC: SPP 2111 - PONyDAC II - Präziser Optischer Nyquist-Puls-Synthesizer DAC' - _id: '175' name: 'TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen Modulatoren auf Basis von CMOS und LNOI (C11*)' publication: 'PIERS Proceedings ' publication_status: accepted publisher: PhotonIcs and Electromagnetics Research Symposium (PIERS) status: public title: Broadband Nyquist Pulse Generation on TFLN Platform for Integrated Quantum Source type: conference user_id: '13256' year: '2025' ... --- _id: '51156' abstract: - lang: eng text: 'Ferroelectric domain wall (DW) conductivity (DWC) can be attributed to two separate mechanisms: (a) the injection/ejection of charge carriers across the Schottky barrier formed at the (metal-)electrode-DW junction and (b) the transport of those charge carriers along the DW. Current-voltage (I-U) characteristics, recorded at variable temperatures from LiNbO3 (LNO) DWs, are clearly able to differentiate between these two contributions. Practically, they allow us to directly quantify the physical parameters relevant to the two mechanisms (a) and (b) mentioned above. These are, for example, the resistance of the DW, the saturation current, the ideality factor, and the Schottky barrier height of the electrode-DW junction. Furthermore, the activation energies needed to initiate the thermally activated electronic transport along the DWs can be extracted. In addition, we show that electronic transport along LNO DWs can be elegantly viewed and interpreted in an adapted semiconductor picture based on a double-diode, double-resistor equivalent-circuit model, the R2D2 model. Finally, our R2D2 model was checked for its universality by successfully fitting the I-U curves of not only z-cut LNO bulk DWs, but equally of z-cut thin-film LNO DWs, and of x-cut thin-film DWs as reported in literature.' article_number: '024007' article_type: original author: - first_name: Manuel full_name: Zahn, Manuel last_name: Zahn - first_name: Elke full_name: Beyreuther, Elke last_name: Beyreuther - first_name: Iuliia full_name: Kiseleva, Iuliia last_name: Kiseleva - first_name: Ahmed Samir full_name: Lotfy, Ahmed Samir last_name: Lotfy - first_name: Conor J. full_name: McCluskey, Conor J. last_name: McCluskey - first_name: Jesi R. full_name: Maguire, Jesi R. last_name: Maguire - first_name: Ahmet full_name: Suna, Ahmet last_name: Suna - first_name: Michael full_name: Rüsing, Michael id: '22501' last_name: Rüsing orcid: 0000-0003-4682-4577 - first_name: J. Marty full_name: Gregg, J. Marty last_name: Gregg - first_name: Lukas M. full_name: Eng, Lukas M. last_name: Eng citation: ama: Zahn M, Beyreuther E, Kiseleva I, et al. Equivalent-circuit model that quantitatively describes domain-wall conductivity in ferroelectric lithium . Physical Review Applied. 2024;21(2). doi:10.1103/physrevapplied.21.024007 apa: Zahn, M., Beyreuther, E., Kiseleva, I., Lotfy, A. S., McCluskey, C. J., Maguire, J. R., Suna, A., Rüsing, M., Gregg, J. M., & Eng, L. M. (2024). Equivalent-circuit model that quantitatively describes domain-wall conductivity in ferroelectric lithium . Physical Review Applied, 21(2), Article 024007. https://doi.org/10.1103/physrevapplied.21.024007 bibtex: '@article{Zahn_Beyreuther_Kiseleva_Lotfy_McCluskey_Maguire_Suna_Rüsing_Gregg_Eng_2024, title={Equivalent-circuit model that quantitatively describes domain-wall conductivity in ferroelectric lithium }, volume={21}, DOI={10.1103/physrevapplied.21.024007}, number={2024007}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Zahn, Manuel and Beyreuther, Elke and Kiseleva, Iuliia and Lotfy, Ahmed Samir and McCluskey, Conor J. and Maguire, Jesi R. and Suna, Ahmet and Rüsing, Michael and Gregg, J. Marty and Eng, Lukas M.}, year={2024} }' chicago: Zahn, Manuel, Elke Beyreuther, Iuliia Kiseleva, Ahmed Samir Lotfy, Conor J. McCluskey, Jesi R. Maguire, Ahmet Suna, Michael Rüsing, J. Marty Gregg, and Lukas M. Eng. “Equivalent-Circuit Model That Quantitatively Describes Domain-Wall Conductivity in Ferroelectric Lithium .” Physical Review Applied 21, no. 2 (2024). https://doi.org/10.1103/physrevapplied.21.024007. ieee: 'M. Zahn et al., “Equivalent-circuit model that quantitatively describes domain-wall conductivity in ferroelectric lithium ,” Physical Review Applied, vol. 21, no. 2, Art. no. 024007, 2024, doi: 10.1103/physrevapplied.21.024007.' mla: Zahn, Manuel, et al. “Equivalent-Circuit Model That Quantitatively Describes Domain-Wall Conductivity in Ferroelectric Lithium .” Physical Review Applied, vol. 21, no. 2, 024007, American Physical Society (APS), 2024, doi:10.1103/physrevapplied.21.024007. short: M. Zahn, E. Beyreuther, I. Kiseleva, A.S. Lotfy, C.J. McCluskey, J.R. Maguire, A. Suna, M. Rüsing, J.M. Gregg, L.M. Eng, Physical Review Applied 21 (2024). date_created: 2024-02-06T08:02:15Z date_updated: 2024-02-06T08:08:09Z department: - _id: '15' - _id: '169' - _id: '623' - _id: '288' doi: 10.1103/physrevapplied.21.024007 intvolume: ' 21' issue: '2' keyword: - General Physics and Astronomy language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/abs/2307.10322 oa: '1' publication: Physical Review Applied publication_identifier: issn: - 2331-7019 publication_status: published publisher: American Physical Society (APS) quality_controlled: '1' status: public title: 'Equivalent-circuit model that quantitatively describes domain-wall conductivity in ferroelectric lithium ' type: journal_article user_id: '22501' volume: 21 year: '2024' ... --- _id: '51339' author: - first_name: Jonas full_name: Babai-Hemati, Jonas last_name: Babai-Hemati - first_name: Felix full_name: vom Bruch, Felix id: '71245' last_name: vom Bruch - first_name: Harald full_name: Herrmann, Harald id: '216' last_name: Herrmann - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: ama: Babai-Hemati J, vom Bruch F, Herrmann H, Silberhorn C. Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters. Optics Express. Published online 2024. doi:10.1364/oe.510319 apa: Babai-Hemati, J., vom Bruch, F., Herrmann, H., & Silberhorn, C. (2024). Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters. Optics Express. https://doi.org/10.1364/oe.510319 bibtex: '@article{Babai-Hemati_vom Bruch_Herrmann_Silberhorn_2024, title={Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters}, DOI={10.1364/oe.510319}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Babai-Hemati, Jonas and vom Bruch, Felix and Herrmann, Harald and Silberhorn, Christine}, year={2024} }' chicago: Babai-Hemati, Jonas, Felix vom Bruch, Harald Herrmann, and Christine Silberhorn. “Tailored Second Harmonic Generation InTi-Diffused PPLN Waveguides Usingmicro-Heaters.” Optics Express, 2024. https://doi.org/10.1364/oe.510319. ieee: 'J. Babai-Hemati, F. vom Bruch, H. Herrmann, and C. Silberhorn, “Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters,” Optics Express, 2024, doi: 10.1364/oe.510319.' mla: Babai-Hemati, Jonas, et al. “Tailored Second Harmonic Generation InTi-Diffused PPLN Waveguides Usingmicro-Heaters.” Optics Express, Optica Publishing Group, 2024, doi:10.1364/oe.510319. short: J. Babai-Hemati, F. vom Bruch, H. Herrmann, C. Silberhorn, Optics Express (2024). date_created: 2024-02-13T13:03:01Z date_updated: 2024-02-13T13:09:51Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1364/oe.510319 keyword: - Atomic and Molecular Physics - and Optics language: - iso: eng project: - _id: '266' grant_number: PROFILNRW-2020-067 name: 'PhoQC: PhoQC: Photonisches Quantencomputing' publication: Optics Express publication_identifier: issn: - 1094-4087 publication_status: published publisher: Optica Publishing Group status: public title: Tailored second harmonic generation inTi-diffused PPLN waveguides usingmicro-heaters type: journal_article user_id: '216' year: '2024' ... --- _id: '54544' abstract: - lang: eng text: The biphoton correlation time, a measure for the conditional uncertainty in the temporal arrival of two photons from a photon pair source, is a key performance identifier for many quantum spectroscopy applications, with shorter correlation times typically yielding better performance. Furthermore, it provides fundamental insight into the effects of dispersion on the biphoton state. Here, we show that a characteristic dependence of the width of the temporal interferogram can be exploited to obtain insights into the amount of second-order dispersion inside the interferometer and to retrieve actual and Fourier-limited ultrashort biphoton correlation times of around 100 fs. In the presented scheme, we simultaneously measure spectral and temporal interferograms at the output of an SU(1,1) interferometer based on an integrated broadband parametric down conversion source in a Ti:LiNbO3 waveguide. article_number: '020350' author: - first_name: Franz full_name: Roeder, Franz id: '88149' last_name: Roeder - first_name: René full_name: Pollmann, René id: '78890' last_name: Pollmann - first_name: Michael full_name: Stefszky, Michael id: '42777' last_name: Stefszky - first_name: Matteo full_name: Santandrea, Matteo id: '55095' last_name: Santandrea orcid: 0000-0001-5718-358X - first_name: Kai Hong full_name: Luo, Kai Hong id: '36389' last_name: Luo orcid: 0000-0003-1008-4976 - first_name: V. full_name: Quiring, V. last_name: Quiring - first_name: Raimund full_name: Ricken, Raimund last_name: Ricken - first_name: Christof full_name: Eigner, Christof id: '13244' last_name: Eigner orcid: https://orcid.org/0000-0002-5693-3083 - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn citation: ama: Roeder F, Pollmann R, Stefszky M, et al. Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer. PRX Quantum. 2024;5(2). doi:10.1103/prxquantum.5.020350 apa: Roeder, F., Pollmann, R., Stefszky, M., Santandrea, M., Luo, K. H., Quiring, V., Ricken, R., Eigner, C., Brecht, B., & Silberhorn, C. (2024). Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer. PRX Quantum, 5(2), Article 020350. https://doi.org/10.1103/prxquantum.5.020350 bibtex: '@article{Roeder_Pollmann_Stefszky_Santandrea_Luo_Quiring_Ricken_Eigner_Brecht_Silberhorn_2024, title={Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer}, volume={5}, DOI={10.1103/prxquantum.5.020350}, number={2020350}, journal={PRX Quantum}, publisher={American Physical Society (APS)}, author={Roeder, Franz and Pollmann, René and Stefszky, Michael and Santandrea, Matteo and Luo, Kai Hong and Quiring, V. and Ricken, Raimund and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2024} }' chicago: Roeder, Franz, René Pollmann, Michael Stefszky, Matteo Santandrea, Kai Hong Luo, V. Quiring, Raimund Ricken, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer.” PRX Quantum 5, no. 2 (2024). https://doi.org/10.1103/prxquantum.5.020350. ieee: 'F. Roeder et al., “Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer,” PRX Quantum, vol. 5, no. 2, Art. no. 020350, 2024, doi: 10.1103/prxquantum.5.020350.' mla: Roeder, Franz, et al. “Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer.” PRX Quantum, vol. 5, no. 2, 020350, American Physical Society (APS), 2024, doi:10.1103/prxquantum.5.020350. short: F. Roeder, R. Pollmann, M. Stefszky, M. Santandrea, K.H. Luo, V. Quiring, R. Ricken, C. Eigner, B. Brecht, C. Silberhorn, PRX Quantum 5 (2024). date_created: 2024-06-01T12:48:51Z date_updated: 2024-06-01T13:00:53Z department: - _id: '288' - _id: '623' doi: 10.1103/prxquantum.5.020350 intvolume: ' 5' issue: '2' language: - iso: eng project: - _id: '207' grant_number: 13N15065 name: 'MiLiQuant: Miniaturisierte Lichtquellen für den industriellen Einsatz in Quantensensoren und Quanten-Imaging-Systemen (MiLiQuant) - Teilvorhaben: Technologie und Theorie für MIR Quanten-Imaging Systeme' - _id: '571' grant_number: '101070700' name: 'MIRAQLS: MIRAQLS: Mid-infrared Quantum Technology for Sensing' - _id: '190' name: 'E2TPA: Exploiting Entangled Two-Photon Absorption' publication: PRX Quantum publication_identifier: issn: - 2691-3399 publication_status: published publisher: American Physical Society (APS) status: public title: Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer type: journal_article user_id: '88149' volume: 5 year: '2024' ... --- _id: '54812' article_number: '240802' author: - first_name: Lisa T. full_name: Weinbrenner, Lisa T. last_name: Weinbrenner - first_name: Nidhin full_name: Prasannan, Nidhin id: '71403' last_name: Prasannan - first_name: Kiara full_name: Hansenne, Kiara last_name: Hansenne - first_name: Sophia full_name: Denker, Sophia last_name: Denker - first_name: Jan full_name: Sperling, Jan id: '75127' last_name: Sperling orcid: 0000-0002-5844-3205 - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Otfried full_name: Gühne, Otfried last_name: Gühne citation: ama: 'Weinbrenner LT, Prasannan N, Hansenne K, et al. Certifying the Topology of Quantum Networks: Theory and Experiment. Physical Review Letters. 2024;132(24). doi:10.1103/physrevlett.132.240802' apa: 'Weinbrenner, L. T., Prasannan, N., Hansenne, K., Denker, S., Sperling, J., Brecht, B., Silberhorn, C., & Gühne, O. (2024). Certifying the Topology of Quantum Networks: Theory and Experiment. Physical Review Letters, 132(24), Article 240802. https://doi.org/10.1103/physrevlett.132.240802' bibtex: '@article{Weinbrenner_Prasannan_Hansenne_Denker_Sperling_Brecht_Silberhorn_Gühne_2024, title={Certifying the Topology of Quantum Networks: Theory and Experiment}, volume={132}, DOI={10.1103/physrevlett.132.240802}, number={24240802}, journal={Physical Review Letters}, publisher={American Physical Society (APS)}, author={Weinbrenner, Lisa T. and Prasannan, Nidhin and Hansenne, Kiara and Denker, Sophia and Sperling, Jan and Brecht, Benjamin and Silberhorn, Christine and Gühne, Otfried}, year={2024} }' chicago: 'Weinbrenner, Lisa T., Nidhin Prasannan, Kiara Hansenne, Sophia Denker, Jan Sperling, Benjamin Brecht, Christine Silberhorn, and Otfried Gühne. “Certifying the Topology of Quantum Networks: Theory and Experiment.” Physical Review Letters 132, no. 24 (2024). https://doi.org/10.1103/physrevlett.132.240802.' ieee: 'L. T. Weinbrenner et al., “Certifying the Topology of Quantum Networks: Theory and Experiment,” Physical Review Letters, vol. 132, no. 24, Art. no. 240802, 2024, doi: 10.1103/physrevlett.132.240802.' mla: 'Weinbrenner, Lisa T., et al. “Certifying the Topology of Quantum Networks: Theory and Experiment.” Physical Review Letters, vol. 132, no. 24, 240802, American Physical Society (APS), 2024, doi:10.1103/physrevlett.132.240802.' short: L.T. Weinbrenner, N. Prasannan, K. Hansenne, S. Denker, J. Sperling, B. Brecht, C. Silberhorn, O. Gühne, Physical Review Letters 132 (2024). date_created: 2024-06-19T06:36:54Z date_updated: 2024-06-19T06:59:45Z department: - _id: '15' - _id: '623' - _id: '288' doi: 10.1103/physrevlett.132.240802 intvolume: ' 132' issue: '24' language: - iso: eng publication: Physical Review Letters publication_identifier: issn: - 0031-9007 - 1079-7114 publication_status: published publisher: American Physical Society (APS) status: public title: 'Certifying the Topology of Quantum Networks: Theory and Experiment' type: journal_article user_id: '27150' volume: 132 year: '2024' ... --- _id: '55174' abstract: - lang: eng text: "We apply principal component analysis (PCA) to a set of electrical output signals from a commercially available superconducting nanowire single-photon detector (SNSPD) to investigate their photon-number-resolving capability. We find that the rising edge as well as the amplitude of the electrical signal have the most dependence on photon number. Accurately measuring the rising edge while simultaneously measuring the voltage of the pulse amplitude maximizes the photon-number resolution of SNSPDs. Using an optimal basis of principal components, we show unambiguous discrimination between one- and two-photon events, as well as partial resolution up to five photons. This expands the use case of SNSPDs to photon-counting experiments, without the need of detector multiplexing architectures.\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 " article_number: '014024' author: - first_name: Timon full_name: Schapeler, Timon id: '55629' last_name: Schapeler orcid: 0000-0001-7652-1716 - first_name: Niklas full_name: Lamberty, Niklas last_name: Lamberty - first_name: Thomas full_name: Hummel, Thomas id: '83846' last_name: Hummel orcid: 0000-0001-8627-2119 - first_name: Fabian full_name: Schlue, Fabian id: '63579' last_name: Schlue - first_name: Michael full_name: Stefszky, Michael id: '42777' last_name: Stefszky - first_name: Benjamin full_name: Brecht, Benjamin id: '27150' last_name: Brecht orcid: '0000-0003-4140-0556 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Tim full_name: Bartley, Tim id: '49683' last_name: Bartley citation: ama: Schapeler T, Lamberty N, Hummel T, et al. Electrical trace analysis of superconducting nanowire photon-number-resolving detectors. Physical Review Applied. 2024;22(1). doi:10.1103/physrevapplied.22.014024 apa: Schapeler, T., Lamberty, N., Hummel, T., Schlue, F., Stefszky, M., Brecht, B., Silberhorn, C., & Bartley, T. (2024). Electrical trace analysis of superconducting nanowire photon-number-resolving detectors. Physical Review Applied, 22(1), Article 014024. https://doi.org/10.1103/physrevapplied.22.014024 bibtex: '@article{Schapeler_Lamberty_Hummel_Schlue_Stefszky_Brecht_Silberhorn_Bartley_2024, title={Electrical trace analysis of superconducting nanowire photon-number-resolving detectors}, volume={22}, DOI={10.1103/physrevapplied.22.014024}, number={1014024}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Schapeler, Timon and Lamberty, Niklas and Hummel, Thomas and Schlue, Fabian and Stefszky, Michael and Brecht, Benjamin and Silberhorn, Christine and Bartley, Tim}, year={2024} }' chicago: Schapeler, Timon, Niklas Lamberty, Thomas Hummel, Fabian Schlue, Michael Stefszky, Benjamin Brecht, Christine Silberhorn, and Tim Bartley. “Electrical Trace Analysis of Superconducting Nanowire Photon-Number-Resolving Detectors.” Physical Review Applied 22, no. 1 (2024). https://doi.org/10.1103/physrevapplied.22.014024. ieee: 'T. Schapeler et al., “Electrical trace analysis of superconducting nanowire photon-number-resolving detectors,” Physical Review Applied, vol. 22, no. 1, Art. no. 014024, 2024, doi: 10.1103/physrevapplied.22.014024.' mla: Schapeler, Timon, et al. “Electrical Trace Analysis of Superconducting Nanowire Photon-Number-Resolving Detectors.” Physical Review Applied, vol. 22, no. 1, 014024, American Physical Society (APS), 2024, doi:10.1103/physrevapplied.22.014024. short: T. Schapeler, N. Lamberty, T. Hummel, F. Schlue, M. Stefszky, B. Brecht, C. Silberhorn, T. Bartley, Physical Review Applied 22 (2024). date_created: 2024-07-11T07:23:08Z date_updated: 2024-07-11T09:36:00Z department: - _id: '15' - _id: '623' doi: 10.1103/physrevapplied.22.014024 intvolume: ' 22' issue: '1' language: - iso: eng main_file_link: - open_access: '1' oa: '1' project: - _id: '239' call_identifier: ERC grant_number: '101042399' name: 'QuESADILLA: ERC-Grant: QuESADILLA: Quantum Engineering Superconducting Array Detectors in Low-Light Applications' - _id: '191' grant_number: 13N16103 name: 'PhoQuant--QCTest: PhoQuant: Photonische Quantencomputer - Quantencomputing Testplattform' publication: Physical Review Applied publication_identifier: issn: - 2331-7019 publication_status: published publisher: American Physical Society (APS) status: public title: Electrical trace analysis of superconducting nanowire photon-number-resolving detectors type: journal_article user_id: '55629' volume: 22 year: '2024' ... --- _id: '54668' abstract: - lang: eng text: Samples of dielectric optical waveguides of rib or strip type in thin-film lithium niobate (TFLN) technology are characterized with respect to their optical loss using the Fabry-Pérot method. Attributing the losses mainly to sidewall roughness, we employ a simple perturbational procedure, based on rigorously computed mode profiles of idealized channels, to estimate the attenuation for waveguides with different cross sections. A single fit parameter suffices for an adequate modelling of the effect of the waveguide geometry on the loss levels. author: - first_name: Manfred full_name: Hammer, Manfred id: '48077' last_name: Hammer orcid: 0000-0002-6331-9348 - first_name: Silia full_name: Babel, Silia id: '63231' last_name: Babel orcid: https://orcid.org/0000-0002-1568-2580 - first_name: Henna full_name: Farheen, Henna id: '53444' last_name: Farheen orcid: 0000-0001-7730-3489 - first_name: Laura full_name: Padberg, Laura id: '40300' last_name: Padberg - first_name: J. Christoph full_name: Scheytt, J. Christoph id: '37144' last_name: Scheytt orcid: '0000-0002-5950-6618 ' - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Jens full_name: Förstner, Jens id: '158' last_name: Förstner orcid: 0000-0001-7059-9862 citation: ama: Hammer M, Babel S, Farheen H, et al. Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides. Optics Express. 2024;32(13):22878. doi:10.1364/oe.521766 apa: Hammer, M., Babel, S., Farheen, H., Padberg, L., Scheytt, J. C., Silberhorn, C., & Förstner, J. (2024). Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides. Optics Express, 32(13), 22878. https://doi.org/10.1364/oe.521766 bibtex: '@article{Hammer_Babel_Farheen_Padberg_Scheytt_Silberhorn_Förstner_2024, title={Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides}, volume={32}, DOI={10.1364/oe.521766}, number={13}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Hammer, Manfred and Babel, Silia and Farheen, Henna and Padberg, Laura and Scheytt, J. Christoph and Silberhorn, Christine and Förstner, Jens}, year={2024}, pages={22878} }' chicago: 'Hammer, Manfred, Silia Babel, Henna Farheen, Laura Padberg, J. Christoph Scheytt, Christine Silberhorn, and Jens Förstner. “Estimation of Losses Caused by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.” Optics Express 32, no. 13 (2024): 22878. https://doi.org/10.1364/oe.521766.' ieee: 'M. Hammer et al., “Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides,” Optics Express, vol. 32, no. 13, p. 22878, 2024, doi: 10.1364/oe.521766.' mla: Hammer, Manfred, et al. “Estimation of Losses Caused by Sidewall Roughness in Thin-Film Lithium Niobate Rib and Strip Waveguides.” Optics Express, vol. 32, no. 13, Optica Publishing Group, 2024, p. 22878, doi:10.1364/oe.521766. short: M. Hammer, S. Babel, H. Farheen, L. Padberg, J.C. Scheytt, C. Silberhorn, J. Förstner, Optics Express 32 (2024) 22878. date_created: 2024-06-10T11:18:06Z date_updated: 2024-07-22T07:43:02Z ddc: - '530' department: - _id: '61' - _id: '429' - _id: '623' - _id: '263' - _id: '288' doi: 10.1364/oe.521766 file: - access_level: open_access content_type: application/pdf creator: fossie date_created: 2024-06-10T11:25:00Z date_updated: 2024-06-10T11:25:00Z file_id: '54669' file_name: 2024-06 Hammer - Optics Express - Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides.pdf file_size: 4004782 relation: main_file file_date_updated: 2024-06-10T11:25:00Z has_accepted_license: '1' intvolume: ' 32' issue: '13' keyword: - tet_topic_waveguide language: - iso: eng oa: '1' page: '22878' project: - _id: '53' grant_number: '231447078' name: 'TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen' - _id: '175' grant_number: '231447078' name: 'TRR 142 - C11: TRR 142 - Kompakte Photonenpaar-Quelle mit ultraschnellen Modulatoren auf Basis von CMOS und LNOI (C11*)' - _id: '167' grant_number: '231447078' name: 'TRR 142 - B06: TRR 142 - Ultraschnelle kohärente opto-elektronische Kontrolle eines photonischen Quantensystems (B06*)' - _id: '266' grant_number: PROFILNRW-2020-067 name: 'PhoQC: PhoQC: Photonisches Quantencomputing' publication: Optics Express publication_identifier: issn: - 1094-4087 publication_status: published publisher: Optica Publishing Group status: public title: Estimation of losses caused by sidewall roughness in thin-film lithium niobate rib and strip waveguides type: journal_article user_id: '158' volume: 32 year: '2024' ... --- _id: '55737' abstract: - lang: eng text: "We report on a photonic simulator of the critical state forming at the quantum phase transition between topologically distinct Anderson insulator phases. We observe a time-staggered profile in the circular photon polarization, which originates from the interplay of a chiral and sublattice symmetry, and has recently been suggested as a signature for topological Anderson criticality within the setup. We discuss the role of statistical detuning from criticality and show that the controlled breaking of phase coherence removes the signal, revealing its origin in quantum coherence.\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 " article_number: '033194' author: - first_name: Sonja full_name: Barkhofen, Sonja id: '48188' last_name: Barkhofen - first_name: Syamsundar full_name: De, Syamsundar last_name: De - first_name: Jan full_name: Sperling, Jan id: '75127' last_name: Sperling orcid: 0000-0002-5844-3205 - first_name: Christine full_name: Silberhorn, Christine id: '26263' last_name: Silberhorn - first_name: Alexander full_name: Altland, Alexander last_name: Altland - first_name: Dmitry full_name: Bagrets, Dmitry last_name: Bagrets - first_name: Kun Woo full_name: Kim, Kun Woo last_name: Kim - first_name: Tobias full_name: Micklitz, Tobias last_name: Micklitz citation: ama: Barkhofen S, De S, Sperling J, et al. Experimental observation of topological quantum criticality. Physical Review Research. 2024;6(3). doi:10.1103/physrevresearch.6.033194 apa: Barkhofen, S., De, S., Sperling, J., Silberhorn, C., Altland, A., Bagrets, D., Kim, K. W., & Micklitz, T. (2024). Experimental observation of topological quantum criticality. Physical Review Research, 6(3), Article 033194. https://doi.org/10.1103/physrevresearch.6.033194 bibtex: '@article{Barkhofen_De_Sperling_Silberhorn_Altland_Bagrets_Kim_Micklitz_2024, title={Experimental observation of topological quantum criticality}, volume={6}, DOI={10.1103/physrevresearch.6.033194}, number={3033194}, journal={Physical Review Research}, publisher={American Physical Society (APS)}, author={Barkhofen, Sonja and De, Syamsundar and Sperling, Jan and Silberhorn, Christine and Altland, Alexander and Bagrets, Dmitry and Kim, Kun Woo and Micklitz, Tobias}, year={2024} }' chicago: Barkhofen, Sonja, Syamsundar De, Jan Sperling, Christine Silberhorn, Alexander Altland, Dmitry Bagrets, Kun Woo Kim, and Tobias Micklitz. “Experimental Observation of Topological Quantum Criticality.” Physical Review Research 6, no. 3 (2024). https://doi.org/10.1103/physrevresearch.6.033194. ieee: 'S. Barkhofen et al., “Experimental observation of topological quantum criticality,” Physical Review Research, vol. 6, no. 3, Art. no. 033194, 2024, doi: 10.1103/physrevresearch.6.033194.' mla: Barkhofen, Sonja, et al. “Experimental Observation of Topological Quantum Criticality.” Physical Review Research, vol. 6, no. 3, 033194, American Physical Society (APS), 2024, doi:10.1103/physrevresearch.6.033194. short: S. Barkhofen, S. De, J. Sperling, C. Silberhorn, A. Altland, D. Bagrets, K.W. Kim, T. Micklitz, Physical Review Research 6 (2024). date_created: 2024-08-22T10:47:06Z date_updated: 2024-08-22T10:47:57Z department: - _id: '623' doi: 10.1103/physrevresearch.6.033194 intvolume: ' 6' issue: '3' language: - iso: eng publication: Physical Review Research publication_identifier: issn: - 2643-1564 publication_status: published publisher: American Physical Society (APS) status: public title: Experimental observation of topological quantum criticality type: journal_article user_id: '48188' volume: 6 year: '2024' ... --- _id: '49652' abstract: - lang: eng text: Broadband coherent anti-Stokes Raman scattering (BCARS) is a powerful spectroscopy method combining high signal intensity with spectral sensitivity, enabling rapid imaging of heterogeneous samples in biomedical research and, more recently, in crystalline materials. However, BCARS encounters spectral distortion due to a setup-dependent non-resonant background (NRB). This study assesses BCARS reproducibility through a round robin experiment using two distinct BCARS setups and crystalline materials with varying structural complexity, including diamond, 6H-SiC, KDP, and KTP. The analysis compares setup-specific NRB correction procedures, detected and NRB-removed spectra, and mode assignment. We determine the influence of BCARS setup parameters like pump wavelength, pulse width, and detection geometry and provide a practical guide for optimizing BCARS setups for solid-state applications. article_number: '112' article_type: original author: - first_name: Franz full_name: Hempel, Franz last_name: Hempel - first_name: Federico full_name: Vernuccio, Federico last_name: Vernuccio - first_name: Lukas full_name: König, Lukas last_name: König - first_name: Robin full_name: Buschbeck, Robin last_name: Buschbeck - first_name: Michael full_name: Rüsing, Michael id: '22501' last_name: Rüsing orcid: 0000-0003-4682-4577 - first_name: Giulio full_name: Cerullo, Giulio last_name: Cerullo - first_name: Dario full_name: Polli, Dario last_name: Polli - first_name: Lukas M. full_name: Eng, Lukas M. last_name: Eng citation: ama: 'Hempel F, Vernuccio F, König L, et al. Comparing transmission- and epi-BCARS: a round robin on solid-state materials. Applied Optics. 2024;63(1). doi:10.1364/ao.505374' apa: 'Hempel, F., Vernuccio, F., König, L., Buschbeck, R., Rüsing, M., Cerullo, G., Polli, D., & Eng, L. M. (2024). Comparing transmission- and epi-BCARS: a round robin on solid-state materials. Applied Optics, 63(1), Article 112. https://doi.org/10.1364/ao.505374' bibtex: '@article{Hempel_Vernuccio_König_Buschbeck_Rüsing_Cerullo_Polli_Eng_2024, title={Comparing transmission- and epi-BCARS: a round robin on solid-state materials}, volume={63}, DOI={10.1364/ao.505374}, number={1112}, journal={Applied Optics}, publisher={Optica Publishing Group}, author={Hempel, Franz and Vernuccio, Federico and König, Lukas and Buschbeck, Robin and Rüsing, Michael and Cerullo, Giulio and Polli, Dario and Eng, Lukas M.}, year={2024} }' chicago: 'Hempel, Franz, Federico Vernuccio, Lukas König, Robin Buschbeck, Michael Rüsing, Giulio Cerullo, Dario Polli, and Lukas M. Eng. “Comparing Transmission- and Epi-BCARS: A Round Robin on Solid-State Materials.” Applied Optics 63, no. 1 (2024). https://doi.org/10.1364/ao.505374.' ieee: 'F. Hempel et al., “Comparing transmission- and epi-BCARS: a round robin on solid-state materials,” Applied Optics, vol. 63, no. 1, Art. no. 112, 2024, doi: 10.1364/ao.505374.' mla: 'Hempel, Franz, et al. “Comparing Transmission- and Epi-BCARS: A Round Robin on Solid-State Materials.” Applied Optics, vol. 63, no. 1, 112, Optica Publishing Group, 2024, doi:10.1364/ao.505374.' short: F. Hempel, F. Vernuccio, L. König, R. Buschbeck, M. Rüsing, G. Cerullo, D. Polli, L.M. Eng, Applied Optics 63 (2024). date_created: 2023-12-15T07:32:38Z date_updated: 2025-04-03T12:36:01Z department: - _id: '15' - _id: '288' - _id: '623' doi: 10.1364/ao.505374 intvolume: ' 63' issue: '1' keyword: - Atomic and Molecular Physics - and Optics - Engineering (miscellaneous) - Electrical and Electronic Engineering language: - iso: eng main_file_link: - open_access: '1' url: https://arxiv.org/pdf/2306.09701.pdf oa: '1' publication: Applied Optics publication_identifier: issn: - 1559-128X - 2155-3165 publication_status: published publisher: Optica Publishing Group quality_controlled: '1' related_material: link: - relation: confirmation url: https://arxiv.org/abs/2306.09701 status: public title: 'Comparing transmission- and epi-BCARS: a round robin on solid-state materials' type: journal_article user_id: '22501' volume: 63 year: '2024' ...