[{"publication":"Physical Review Applied","type":"journal_article","status":"public","abstract":[{"text":"\r\n The development of practical sensors for optical coherence tomography (OCT) with undetected photons requires miniaturization via integration. To be practical, these sensors must exhibit a large spectral bandwidth and a high brightness, which are linked to a high axial resolution and a sufficient signal-to-noise ratio, respectively. Here, we combine these requirements in a scheme for OCT measurements with undetected photons based on nonlinear\r\n \r\n Ti\r\n :\r\n \r\n \r\n Li\r\n Nb\r\n O\r\n \r\n 3\r\n \r\n \r\n waveguides. We investigate the performance benchmarks of the commonly used SU(1,1) scheme in comparison to an induced-coherence scheme and find that the latter is actually better suited when implementing measurements with undetected photons in integrated systems. In both schemes, we perform pump-gain optimization and OCT measurements with undetected photons with an axial resolution as low as\r\n \r\n 28\r\n \r\n μ\r\n \r\n m\r\n \r\n \r\n .\r\n ","lang":"eng"}],"department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"user_id":"27150","_id":"65094","language":[{"iso":"eng"}],"article_number":"034031","issue":"3","publication_identifier":{"issn":["2331-7019"]},"publication_status":"published","intvolume":" 25","citation":{"ama":"Roeder F, Pollmann R, Quiring V, Eigner C, Brecht B, Silberhorn C. Toward integrated sensors for optimized optical coherence tomography with undetected photons. Physical Review Applied. 2026;25(3). doi:10.1103/cwsx-42c4","chicago":"Roeder, Franz, René Pollmann, Viktor Quiring, Christof Eigner, Benjamin Brecht, and Christine Silberhorn. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” Physical Review Applied 25, no. 3 (2026). https://doi.org/10.1103/cwsx-42c4.","ieee":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, and C. Silberhorn, “Toward integrated sensors for optimized optical coherence tomography with undetected photons,” Physical Review Applied, vol. 25, no. 3, Art. no. 034031, 2026, doi: 10.1103/cwsx-42c4.","apa":"Roeder, F., Pollmann, R., Quiring, V., Eigner, C., Brecht, B., & Silberhorn, C. (2026). Toward integrated sensors for optimized optical coherence tomography with undetected photons. Physical Review Applied, 25(3), Article 034031. https://doi.org/10.1103/cwsx-42c4","bibtex":"@article{Roeder_Pollmann_Quiring_Eigner_Brecht_Silberhorn_2026, title={Toward integrated sensors for optimized optical coherence tomography with undetected photons}, volume={25}, DOI={10.1103/cwsx-42c4}, number={3034031}, journal={Physical Review Applied}, publisher={American Physical Society (APS)}, author={Roeder, Franz and Pollmann, René and Quiring, Viktor and Eigner, Christof and Brecht, Benjamin and Silberhorn, Christine}, year={2026} }","short":"F. Roeder, R. Pollmann, V. Quiring, C. Eigner, B. Brecht, C. Silberhorn, Physical Review Applied 25 (2026).","mla":"Roeder, Franz, et al. “Toward Integrated Sensors for Optimized Optical Coherence Tomography with Undetected Photons.” Physical Review Applied, vol. 25, no. 3, 034031, American Physical Society (APS), 2026, doi:10.1103/cwsx-42c4."},"year":"2026","volume":25,"author":[{"first_name":"Franz","last_name":"Roeder","full_name":"Roeder, Franz","id":"88149"},{"id":"78890","full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René"},{"last_name":"Quiring","full_name":"Quiring, Viktor","first_name":"Viktor"},{"first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof"},{"full_name":"Brecht, Benjamin","id":"27150","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin"},{"last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263","first_name":"Christine"}],"date_created":"2026-03-23T12:28:33Z","date_updated":"2026-03-25T07:59:04Z","publisher":"American Physical Society (APS)","doi":"10.1103/cwsx-42c4","title":"Toward integrated sensors for optimized optical coherence tomography with undetected photons"},{"department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"user_id":"22501","_id":"59276","language":[{"iso":"eng"}],"article_number":"064109","publication":"Physical Review B","type":"journal_article","status":"public","abstract":[{"text":"Stress plays a crucial role in thin films and layered systems, and thus significantly influences the material's electrical, mechanical and (nonlinear) optical responses. Despite lithium niobate's wide applicability as a nonlinear optical material, the impact of mechanical stress on its nonlinear optical properties is not well characterized. In this work, we systematically study both experimentally and theoretically, the nonlinear optical responses of thin film lithium niobate (TFLN) single crystals. Compressive and tensile stress is applied in our experiment using a piezodriven strain cell. We then record the second-harmonic-generated (SHG) response in back-reflection geometry, and compare these results to theoretical modeling using density functional theory (DFT). Both methods consistently reveal that uniaxial stress induces changes of the nonlinear optical susceptibility of certain tensor elements on the order of up to 1 pm/(V GPa). The exact value depends on the tensor element that is addressed in our SHG analysis, on the crystal orientation, and also whether using compressive or tensile stresses. Furthermore, a lowering of the crystal symmetry when applying stress along the x or y crystallographic axes is observed by the appearance of new nonlinear optical tensor elements within the strained crystals.","lang":"eng"}],"volume":111,"author":[{"full_name":"Pionteck, Mike N.","last_name":"Pionteck","first_name":"Mike N."},{"first_name":"Matthias","last_name":"Roeper","full_name":"Roeper, Matthias"},{"full_name":"Koppitz, Boris","last_name":"Koppitz","first_name":"Boris"},{"first_name":"Samuel D.","full_name":"Seddon, Samuel D.","last_name":"Seddon"},{"first_name":"Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","full_name":"Rüsing, Michael","id":"22501"},{"last_name":"Padberg","full_name":"Padberg, Laura","id":"40300","first_name":"Laura"},{"orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","id":"13244","full_name":"Eigner, Christof","first_name":"Christof"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"last_name":"Sanna","full_name":"Sanna, Simone","first_name":"Simone"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."}],"date_created":"2025-04-02T16:21:47Z","publisher":"American Physical Society (APS)","date_updated":"2025-04-02T16:24:47Z","doi":"10.1103/physrevb.111.064109","title":"Second-order nonlinear piezo-optic properties of single crystal lithium niobate thin films","issue":"6","quality_controlled":"1","publication_identifier":{"issn":["2469-9950","2469-9969"]},"publication_status":"published","intvolume":" 111","citation":{"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).","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} }","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","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","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."},"year":"2025"},{"status":"public","abstract":[{"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.","lang":"eng"}],"publication":"Optica","type":"journal_article","language":[{"iso":"eng"}],"article_number":"720","user_id":"56843","_id":"60136","intvolume":" 12","citation":{"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","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).","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.","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"},"year":"2025","issue":"5","publication_identifier":{"issn":["2334-2536"]},"publication_status":"published","doi":"10.1364/optica.551287","title":"Cryogenic feedforward of a photonic quantum state","volume":12,"author":[{"first_name":"Frederik","id":"50819","full_name":"Thiele, Frederik","last_name":"Thiele","orcid":"0000-0003-0663-5587"},{"last_name":"Lamberty","id":"75307","full_name":"Lamberty, Niklas","first_name":"Niklas"},{"first_name":"Thomas","full_name":"Hummel, Thomas","id":"83846","orcid":"0000-0001-8627-2119","last_name":"Hummel"},{"full_name":"Lange, Nina Amelie","id":"56843","last_name":"Lange","orcid":"0000-0001-6624-7098","first_name":"Nina Amelie"},{"full_name":"Procopio Peña, Lorenzo Manuel","id":"105816","last_name":"Procopio Peña","first_name":"Lorenzo Manuel"},{"first_name":"Aishi","last_name":"Barua","id":"104502","full_name":"Barua, Aishi"},{"last_name":"Lengeling","full_name":"Lengeling, Sebastian","id":"44373","first_name":"Sebastian"},{"last_name":"Quiring","full_name":"Quiring, Viktor","first_name":"Viktor"},{"first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof"},{"first_name":"Christine","last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine"},{"last_name":"Bartley","full_name":"Bartley, Tim","id":"49683","first_name":"Tim"}],"date_created":"2025-06-04T18:34:16Z","date_updated":"2025-06-12T09:56:47Z","publisher":"Optica Publishing Group"},{"department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"user_id":"49683","_id":"62269","project":[{"_id":"171","name":"TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher Filterung unter Verwendung integrierter supraleitender Detektoren"}],"article_number":"50451","article_type":"original","type":"journal_article","status":"public","volume":33,"author":[{"id":"56843","full_name":"Lange, Nina Amelie","orcid":"0000-0001-6624-7098","last_name":"Lange","first_name":"Nina Amelie"},{"first_name":"Sebastian","last_name":"Lengeling","full_name":"Lengeling, Sebastian","id":"44373"},{"first_name":"Philipp","last_name":"Mues","orcid":"0000-0003-0643-7636","id":"49772","full_name":"Mues, Philipp"},{"first_name":"Viktor","last_name":"Quiring","full_name":"Quiring, Viktor"},{"last_name":"Ridder","id":"63574","full_name":"Ridder, Werner","first_name":"Werner"},{"first_name":"Christof","full_name":"Eigner, Christof","id":"13244","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083"},{"id":"216","full_name":"Herrmann, Harald","last_name":"Herrmann","first_name":"Harald"},{"id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn","first_name":"Christine"},{"first_name":"Tim","id":"49683","full_name":"Bartley, Tim","last_name":"Bartley"}],"oa":"1","date_updated":"2025-12-12T12:13:45Z","doi":"10.1364/oe.578108","main_file_link":[{"open_access":"1"}],"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","intvolume":" 33","citation":{"bibtex":"@article{Lange_Lengeling_Mues_Quiring_Ridder_Eigner_Herrmann_Silberhorn_Bartley_2025, title={Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides}, volume={33}, DOI={10.1364/oe.578108}, number={2450451}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Lange, Nina Amelie and Lengeling, Sebastian and Mues, Philipp and Quiring, Viktor and Ridder, Werner and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine and Bartley, Tim}, year={2025} }","short":"N.A. Lange, S. Lengeling, P. Mues, V. Quiring, W. Ridder, C. Eigner, H. Herrmann, C. Silberhorn, T. Bartley, Optics Express 33 (2025).","mla":"Lange, Nina Amelie, et al. “Widely Non-Degenerate Nonlinear Frequency Conversion in Cryogenic Titanium in-Diffused Lithium Niobate Waveguides.” Optics Express, vol. 33, no. 24, 50451, Optica Publishing Group, 2025, doi:10.1364/oe.578108.","apa":"Lange, N. A., Lengeling, S., Mues, P., Quiring, V., Ridder, W., Eigner, C., Herrmann, H., Silberhorn, C., & Bartley, T. (2025). Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides. Optics Express, 33(24), Article 50451. https://doi.org/10.1364/oe.578108","ama":"Lange NA, Lengeling S, Mues P, et al. Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides. Optics Express. 2025;33(24). doi:10.1364/oe.578108","chicago":"Lange, Nina Amelie, Sebastian Lengeling, Philipp Mues, Viktor Quiring, Werner Ridder, Christof Eigner, Harald Herrmann, Christine Silberhorn, and Tim Bartley. “Widely Non-Degenerate Nonlinear Frequency Conversion in Cryogenic Titanium in-Diffused Lithium Niobate Waveguides.” Optics Express 33, no. 24 (2025). https://doi.org/10.1364/oe.578108.","ieee":"N. A. Lange et al., “Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides,” Optics Express, vol. 33, no. 24, Art. no. 50451, 2025, doi: 10.1364/oe.578108."},"language":[{"iso":"eng"}],"publication":"Optics Express","abstract":[{"lang":"eng","text":"The titanium in-diffused lithium niobate waveguide platform is well-established for reliable prototyping and packaging of many quantum photonic components at room temperature. Nevertheless, compatibility with certain quantum light sources and superconducting detectors requires operation under cryogenic conditions. We characterize alterations in phase-matching and mode guiding of a non-degenerate spontaneous parametric down-conversion process emitting around 1556 nm and 950 nm, under cryogenic conditions. Despite the effects of pyroelectricity and photorefraction, the spectral properties match our theoretical model. Nevertheless, these effects cause small but significant variations within and between cooling cycles. These measurements provide a first benchmark against which other nonlinear photonic integration platforms, such as thin-film lithium niobate, can be compared."}],"date_created":"2025-11-20T10:35:35Z","publisher":"Optica Publishing Group","title":"Widely non-degenerate nonlinear frequency conversion in cryogenic titanium in-diffused lithium niobate waveguides","issue":"24","year":"2025"},{"main_file_link":[{"open_access":"1","url":"https://www.sciencedirect.com/science/article/pii/S0030399225018511?via%3Dihub"}],"doi":"10.1016/j.optlastec.2025.114260","date_updated":"2025-12-18T08:27:13Z","oa":"1","author":[{"id":"69553","full_name":"Kirsch, Michelle","last_name":"Kirsch","first_name":"Michelle"},{"last_name":"Kießler","id":"44252","full_name":"Kießler, Christian","first_name":"Christian"},{"first_name":"Sebastian","full_name":"Lengeling, Sebastian","id":"44373","last_name":"Lengeling"},{"last_name":"Stefszky","id":"42777","full_name":"Stefszky, Michael","first_name":"Michael"},{"first_name":"Christof","id":"13244","full_name":"Eigner, Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083"},{"first_name":"Harald","id":"216","full_name":"Herrmann, Harald","last_name":"Herrmann"},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"}],"volume":193,"citation":{"ama":"Kirsch M, Kießler C, Lengeling S, et al. Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides. Optics & Laser Technology. 2025;193. doi:10.1016/j.optlastec.2025.114260","chicago":"Kirsch, Michelle, Christian Kießler, Sebastian Lengeling, Michael Stefszky, Christof Eigner, Harald Herrmann, and Christine Silberhorn. “Photorefraction and In-Situ Optical Cleaning in Various Types of LiNbO3 Waveguides.” Optics & Laser Technology 193 (2025). https://doi.org/10.1016/j.optlastec.2025.114260.","ieee":"M. Kirsch et al., “Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides,” Optics & Laser Technology, vol. 193, Art. no. 114260, 2025, doi: 10.1016/j.optlastec.2025.114260.","apa":"Kirsch, M., Kießler, C., Lengeling, S., Stefszky, M., Eigner, C., Herrmann, H., & Silberhorn, C. (2025). Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides. Optics & Laser Technology, 193, Article 114260. https://doi.org/10.1016/j.optlastec.2025.114260","mla":"Kirsch, Michelle, et al. “Photorefraction and In-Situ Optical Cleaning in Various Types of LiNbO3 Waveguides.” Optics & Laser Technology, vol. 193, 114260, Elsevier BV, 2025, doi:10.1016/j.optlastec.2025.114260.","short":"M. Kirsch, C. Kießler, S. Lengeling, M. Stefszky, C. Eigner, H. Herrmann, C. Silberhorn, Optics & Laser Technology 193 (2025).","bibtex":"@article{Kirsch_Kießler_Lengeling_Stefszky_Eigner_Herrmann_Silberhorn_2025, title={Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides}, volume={193}, DOI={10.1016/j.optlastec.2025.114260}, number={114260}, journal={Optics & Laser Technology}, publisher={Elsevier BV}, author={Kirsch, Michelle and Kießler, Christian and Lengeling, Sebastian and Stefszky, Michael and Eigner, Christof and Herrmann, Harald and Silberhorn, Christine}, year={2025} }"},"intvolume":" 193","publication_status":"published","publication_identifier":{"issn":["0030-3992"]},"article_type":"original","article_number":"114260","_id":"63192","user_id":"69553","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"status":"public","type":"journal_article","title":"Photorefraction and in-situ optical cleaning in various types of LiNbO3 waveguides","publisher":"Elsevier BV","date_created":"2025-12-18T08:17:57Z","year":"2025","quality_controlled":"1","language":[{"iso":"eng"}],"abstract":[{"lang":"eng","text":"Lithium niobate (LiNbO3) is a widely used material with several desirable physical properties, such as high second-order nonlinear optical and strong electro-optical effects. Thus LiNbO3 is used for various applications such as electro-optic modulation or nonlinear frequency conversion and mixing. But LiNbO3 also exhibits a strong photorefractive effect, which limits the intensity of the optical fields involved. Various approaches to reduce the photorefractive effect have been investigated, such as increasing the temperature, doping the crystal or using different waveguide designs in LiNbO3. Here, we present an analysis of the approach to increase the photorefractive damage threshold by using different waveguide designs. Contrary to previous claims and investigations, our SHG measurements revealed no significant difference in resistance to photorefractive damage when comparing conventional Ti-doped channel waveguides and Ti-doped diced ridge waveguides in LiNbO3. Furthermore, we have investigated the effect of photorefractive cleaning and curing using a light field at 532 nm. Here, we observe a reduction in the photorefractive effect at room temperature during and after SHG measurements, which is an easy alternative to conventional approaches."}],"publication":"Optics & Laser Technology"},{"issue":"25","year":"2025","date_created":"2025-12-15T07:20:36Z","publisher":"Optica Publishing Group","title":"Ultrabright, two-color photon pair source based on thin-film lithium niobate for bridging visible and telecom wavelengths","publication":"Optics Express","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."}],"language":[{"iso":"eng"}],"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","intvolume":" 33","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","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.","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.","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).","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} }","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.","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"},"volume":33,"author":[{"id":"63231","full_name":"Babel, Silia","orcid":"https://orcid.org/0000-0002-1568-2580","last_name":"Babel","first_name":"Silia"},{"first_name":"Laura","id":"61375","full_name":"Bollmers, Laura","last_name":"Bollmers"},{"full_name":"Roeder, Franz","id":"88149","last_name":"Roeder","first_name":"Franz"},{"last_name":"Ridder","full_name":"Ridder, Werner","id":"63574","first_name":"Werner"},{"id":"40420","full_name":"Golla, Christian","last_name":"Golla","first_name":"Christian"},{"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","id":"216","full_name":"Herrmann, Harald","last_name":"Herrmann"},{"id":"27150","full_name":"Brecht, Benjamin","orcid":"0000-0003-4140-0556 ","last_name":"Brecht","first_name":"Benjamin"},{"first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof"},{"last_name":"Padberg","id":"40300","full_name":"Padberg, Laura","first_name":"Laura"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"}],"oa":"1","date_updated":"2026-01-07T11:28:35Z","doi":"10.1364/oe.571605","main_file_link":[{"open_access":"1","url":"https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-25-52729"}],"type":"journal_article","status":"public","department":[{"_id":"288"},{"_id":"623"}],"user_id":"63231","_id":"63091","article_type":"original","article_number":"52729"},{"publication_identifier":{"issn":["2192-8606","2192-8614"]},"publication_status":"published","page":"4761","intvolume":" 14","citation":{"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.","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} }","short":"L. Bollmers, N. Spiegelberg, M. Rüsing, C. Eigner, L. Padberg, C. Silberhorn, Nanophotonics 14 (2025) 4761.","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."},"volume":14,"author":[{"first_name":"Laura","full_name":"Bollmers, Laura","id":"61375","last_name":"Bollmers"},{"full_name":"Spiegelberg, Noah","last_name":"Spiegelberg","first_name":"Noah"},{"last_name":"Rüsing","orcid":"0000-0003-4682-4577","full_name":"Rüsing, Michael","id":"22501","first_name":"Michael"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof","id":"13244"},{"full_name":"Padberg, Laura","id":"40300","last_name":"Padberg","first_name":"Laura"},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"}],"oa":"1","date_updated":"2026-01-07T12:06:29Z","doi":"10.1515/nanoph-2025-0461","main_file_link":[{"url":"https://doi.org/10.1515/nanoph-2025-0461","open_access":"1"}],"type":"journal_article","status":"public","department":[{"_id":"15"},{"_id":"288"},{"_id":"623"}],"user_id":"22501","_id":"62713","article_type":"original","quality_controlled":"1","year":"2025","date_created":"2025-12-01T08:45:07Z","publisher":"Walter de Gruyter GmbH","title":"Segmented finger electrodes to optimize ultra-long continuous wafer-scale periodic poling in thin-film lithium niobate","publication":"Nanophotonics","abstract":[{"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.","lang":"eng"}],"language":[{"iso":"eng"}]},{"type":"journal_article","status":"public","department":[{"_id":"15"},{"_id":"623"},{"_id":"295"},{"_id":"790"},{"_id":"288"},{"_id":"230"},{"_id":"429"},{"_id":"35"},{"_id":"170"},{"_id":"169"},{"_id":"27"}],"user_id":"22501","_id":"60566","project":[{"_id":"52","name":"PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"name":"TRR 142 - A: TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168"},{"name":"TRR 142 - A11: TRR 142 - Subproject A11","_id":"166"}],"file_date_updated":"2025-07-10T06:43:34Z","article_number":"074402","has_accepted_license":"1","publication_identifier":{"issn":["2475-9953"]},"publication_status":"published","intvolume":" 9","citation":{"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} }","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).","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.","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","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","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.","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."},"volume":9,"author":[{"full_name":"Bocchini, Adriana","id":"58349","orcid":"0000-0002-2134-3075","last_name":"Bocchini","first_name":"Adriana"},{"first_name":"Michael","full_name":"Rüsing, Michael","id":"22501","orcid":"0000-0003-4682-4577","last_name":"Rüsing"},{"first_name":"Laura","last_name":"Bollmers","id":"61375","full_name":"Bollmers, Laura"},{"id":"44373","full_name":"Lengeling, Sebastian","last_name":"Lengeling","first_name":"Sebastian"},{"first_name":"Philipp","orcid":"0000-0003-0643-7636","last_name":"Mues","full_name":"Mues, Philipp","id":"49772"},{"id":"40300","full_name":"Padberg, Laura","last_name":"Padberg","first_name":"Laura"},{"first_name":"Uwe","id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"id":"13244","full_name":"Eigner, Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof"},{"first_name":"Wolf Gero","last_name":"Schmidt","orcid":"0000-0002-2717-5076","full_name":"Schmidt, Wolf Gero","id":"468"}],"date_updated":"2026-03-17T17:50:06Z","oa":"1","doi":"10.1103/5wz1-bjyr","main_file_link":[{"url":"https://link.aps.org/doi/10.1103/5wz1-bjyr","open_access":"1"}],"publication":"Physical Review Materials","file":[{"relation":"main_file","content_type":"application/pdf","file_name":"Mg_dopants_LN_PRM.pdf","access_level":"open_access","file_id":"60567","file_size":4175120,"creator":"adrianab","date_created":"2025-07-09T09:18:45Z","date_updated":"2025-07-10T06:43:34Z"}],"language":[{"iso":"eng"}],"ddc":["530"],"issue":"7","year":"2025","date_created":"2025-07-09T09:13:24Z","publisher":"American Physical Society (APS)","title":"Mg dopants in lithium niobate: Defect models and impact on domain inversion"},{"title":"Measurement of Ultrashort Biphoton Correlation Times with an Integrated Two-Color Broadband SU(1,1)-Interferometer","doi":"10.1103/prxquantum.5.020350","date_updated":"2024-06-01T13:00:53Z","publisher":"American Physical Society (APS)","date_created":"2024-06-01T12:48:51Z","author":[{"first_name":"Franz","last_name":"Roeder","id":"88149","full_name":"Roeder, Franz"},{"id":"78890","full_name":"Pollmann, René","last_name":"Pollmann","first_name":"René"},{"full_name":"Stefszky, Michael","id":"42777","last_name":"Stefszky","first_name":"Michael"},{"orcid":"0000-0001-5718-358X","last_name":"Santandrea","id":"55095","full_name":"Santandrea, Matteo","first_name":"Matteo"},{"first_name":"Kai Hong","full_name":"Luo, Kai Hong","id":"36389","orcid":"0000-0003-1008-4976","last_name":"Luo"},{"last_name":"Quiring","full_name":"Quiring, V.","first_name":"V."},{"full_name":"Ricken, Raimund","last_name":"Ricken","first_name":"Raimund"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof","id":"13244"},{"full_name":"Brecht, Benjamin","id":"27150","last_name":"Brecht","orcid":"0000-0003-4140-0556 ","first_name":"Benjamin"},{"first_name":"Christine","last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine"}],"volume":5,"year":"2024","citation":{"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","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).","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.","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} }","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","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."},"intvolume":" 5","publication_status":"published","publication_identifier":{"issn":["2691-3399"]},"issue":"2","article_number":"020350","language":[{"iso":"eng"}],"project":[{"_id":"207","name":"MiLiQuant: Miniaturisierte Lichtquellen für den industriellen Einsatz in Quantensensoren und Quanten-Imaging-Systemen (MiLiQuant) - Teilvorhaben: Technologie und Theorie für MIR Quanten-Imaging Systeme","grant_number":"13N15065"},{"grant_number":"101070700","name":"MIRAQLS: MIRAQLS: Mid-infrared Quantum Technology for Sensing","_id":"571"},{"name":"E2TPA: Exploiting Entangled Two-Photon Absorption","_id":"190"}],"_id":"54544","user_id":"88149","department":[{"_id":"288"},{"_id":"623"}],"abstract":[{"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.","lang":"eng"}],"status":"public","type":"journal_article","publication":"PRX Quantum"},{"citation":{"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","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.","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.","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} }","short":"L. Bollmers, T. Babai-Hemati, B. Koppitz, C. Eigner, L. Padberg, M. Rüsing, L.M. Eng, C. Silberhorn, Applied Physics Letters 125 (2024).","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.","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"},"intvolume":" 125","year":"2024","issue":"15","publication_status":"published","publication_identifier":{"issn":["0003-6951","1077-3118"]},"doi":"10.1063/5.0210972","title":"Surface-near domain engineering in multi-domain x-cut lithium niobate tantalate mixed crystals","date_created":"2024-11-13T08:06:59Z","author":[{"first_name":"Laura","full_name":"Bollmers, Laura","id":"61375","last_name":"Bollmers"},{"last_name":"Babai-Hemati","full_name":"Babai-Hemati, Tobias","first_name":"Tobias"},{"first_name":"Boris","full_name":"Koppitz, Boris","last_name":"Koppitz"},{"last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","full_name":"Eigner, Christof","id":"13244","first_name":"Christof"},{"first_name":"Laura","last_name":"Padberg","id":"40300","full_name":"Padberg, Laura"},{"id":"22501","full_name":"Rüsing, Michael","orcid":"0000-0003-4682-4577","last_name":"Rüsing","first_name":"Michael"},{"first_name":"Lukas M.","full_name":"Eng, Lukas M.","last_name":"Eng"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"}],"volume":125,"date_updated":"2024-11-15T09:15:08Z","publisher":"AIP Publishing","status":"public","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"}],"type":"journal_article","publication":"Applied Physics Letters","language":[{"iso":"eng"}],"user_id":"61375","department":[{"_id":"15"},{"_id":"623"},{"_id":"230"},{"_id":"288"}],"project":[{"name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)","_id":"168","grant_number":"231447078"}],"_id":"57028"},{"language":[{"iso":"eng"}],"user_id":"22501","department":[{"_id":"288"},{"_id":"15"},{"_id":"623"}],"_id":"59259","status":"public","type":"misc","doi":"10.5281/zenodo.15124929","title":"Quantum photonic systems in CMOS compatible silicon nitride technology ","date_created":"2025-04-02T11:24:23Z","author":[{"first_name":"Tobias","full_name":"Schwabe, Tobias","id":"39217","last_name":"Schwabe"},{"orcid":"0000-0003-4682-4577","last_name":"Rüsing","id":"22501","full_name":"Rüsing, Michael","first_name":"Michael"},{"full_name":"Staal, Niels","last_name":"Staal","first_name":"Niels"},{"first_name":"Max","last_name":"Schwengelbeck","full_name":"Schwengelbeck, Max"},{"id":"61375","full_name":"Bollmers, Laura","last_name":"Bollmers","first_name":"Laura"},{"id":"40300","full_name":"Padberg, Laura","last_name":"Padberg","first_name":"Laura"},{"last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof","first_name":"Christof"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"first_name":"J. Christoph","orcid":"0000-0002-5950-6618 ","last_name":"Scheytt","id":"37144","full_name":"Scheytt, J. Christoph"}],"date_updated":"2025-04-03T12:34:56Z","publisher":"Zenodo","citation":{"ama":"Schwabe T, Rüsing M, Staal N, et al. Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology . Zenodo; 2024. doi:10.5281/zenodo.15124929","ieee":"T. Schwabe et al., Quantum photonic systems in CMOS compatible silicon nitride technology . Zenodo, 2024.","chicago":"Schwabe, Tobias, Michael Rüsing, Niels Staal, Max Schwengelbeck, Laura Bollmers, Laura Padberg, Christof Eigner, Christine Silberhorn, and J. Christoph Scheytt. Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology . Zenodo, 2024. https://doi.org/10.5281/zenodo.15124929.","apa":"Schwabe, T., Rüsing, M., Staal, N., Schwengelbeck, M., Bollmers, L., Padberg, L., Eigner, C., Silberhorn, C., & Scheytt, J. C. (2024). Quantum photonic systems in CMOS compatible silicon nitride technology . Zenodo. https://doi.org/10.5281/zenodo.15124929","bibtex":"@book{Schwabe_Rüsing_Staal_Schwengelbeck_Bollmers_Padberg_Eigner_Silberhorn_Scheytt_2024, title={Quantum photonic systems in CMOS compatible silicon nitride technology }, DOI={10.5281/zenodo.15124929}, publisher={Zenodo}, author={Schwabe, Tobias and Rüsing, Michael and Staal, Niels and Schwengelbeck, Max and Bollmers, Laura and Padberg, Laura and Eigner, Christof and Silberhorn, Christine and Scheytt, J. Christoph}, year={2024} }","mla":"Schwabe, Tobias, et al. Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology . Zenodo, 2024, doi:10.5281/zenodo.15124929.","short":"T. Schwabe, M. Rüsing, N. Staal, M. Schwengelbeck, L. Bollmers, L. Padberg, C. Eigner, C. Silberhorn, J.C. Scheytt, Quantum Photonic Systems in CMOS Compatible Silicon Nitride Technology , Zenodo, 2024."},"year":"2024"},{"language":[{"iso":"eng"}],"keyword":["General Earth and Planetary Sciences","General Environmental Science"],"article_number":"015402","user_id":"56843","_id":"51356","project":[{"_id":"171","name":"TRR 142; TP C07: Hohlraum-verstärkte Parametrische Fluoreszenz mit zeitlicher Filterung unter Verwendung integrierter supraleitender Detektoren"}],"status":"public","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."}],"publication":"Materials for Quantum Technology","type":"journal_article","doi":"10.1088/2633-4356/ad207d","title":"Pyroelectric influence on lithium niobate during the thermal transition for cryogenic integrated photonics","volume":4,"author":[{"orcid":"0000-0003-0663-5587","last_name":"Thiele","id":"50819","full_name":"Thiele, Frederik","first_name":"Frederik"},{"last_name":"Hummel","orcid":"0000-0001-8627-2119","full_name":"Hummel, Thomas","id":"83846","first_name":"Thomas"},{"first_name":"Nina Amelie","full_name":"Lange, Nina Amelie","id":"56843","orcid":"0000-0001-6624-7098","last_name":"Lange"},{"last_name":"Dreher","full_name":"Dreher, Felix","first_name":"Felix"},{"full_name":"Protte, Maximilian","last_name":"Protte","first_name":"Maximilian"},{"first_name":"Felix vom","last_name":"Bruch","full_name":"Bruch, Felix vom"},{"first_name":"Sebastian","full_name":"Lengeling, Sebastian","id":"44373","last_name":"Lengeling"},{"last_name":"Herrmann","full_name":"Herrmann, Harald","id":"216","first_name":"Harald"},{"last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","full_name":"Eigner, Christof","id":"13244","first_name":"Christof"},{"last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263","first_name":"Christine"},{"last_name":"Bartley","id":"49683","full_name":"Bartley, Tim","first_name":"Tim"}],"date_created":"2024-02-16T07:56:44Z","date_updated":"2025-12-15T09:23:02Z","publisher":"IOP Publishing","intvolume":" 4","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.","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","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).","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.","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"},"year":"2024","issue":"1","publication_identifier":{"issn":["2633-4356"]},"publication_status":"published"},{"doi":"10.1364/oe.544206","title":"Programmable time-frequency mode-sorting of single photons with a multi-output quantum pulse gate","volume":33,"author":[{"last_name":"Serino","id":"88242","full_name":"Serino, Laura Maria","first_name":"Laura Maria"},{"full_name":"Eigner, Christof","id":"13244","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof"},{"orcid":"0000-0003-4140-0556 ","last_name":"Brecht","full_name":"Brecht, Benjamin","id":"27150","first_name":"Benjamin"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"}],"date_created":"2025-12-18T16:09:22Z","publisher":"Optica Publishing Group","date_updated":"2025-12-18T16:09:44Z","intvolume":" 33","citation":{"short":"L.M. Serino, C. Eigner, B. Brecht, C. Silberhorn, Optics Express 33 (2024).","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} }","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.","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","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","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.","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."},"year":"2024","issue":"3","publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","language":[{"iso":"eng"}],"article_number":"5577","department":[{"_id":"15"},{"_id":"623"}],"user_id":"27150","_id":"63217","status":"public","abstract":[{"lang":"eng","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."}],"publication":"Optics Express","type":"journal_article"},{"title":"Integrated, bright broadband, two-colour parametric down-conversion source","date_created":"2024-06-19T06:58:17Z","publisher":"Optica Publishing Group","year":"2024","issue":"14","language":[{"iso":"eng"}],"abstract":[{"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.","lang":"eng"}],"publication":"Optics Express","doi":"10.1364/oe.522549","volume":32,"author":[{"first_name":"René","last_name":"Pollmann","full_name":"Pollmann, René","id":"78890"},{"first_name":"Franz","full_name":"Roeder, Franz","id":"88149","last_name":"Roeder"},{"full_name":"Quiring, Victor","last_name":"Quiring","first_name":"Victor"},{"first_name":"Raimund","last_name":"Ricken","full_name":"Ricken, Raimund"},{"orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof","id":"13244","first_name":"Christof"},{"first_name":"Benjamin","id":"27150","full_name":"Brecht, Benjamin","last_name":"Brecht","orcid":"0000-0003-4140-0556 "},{"first_name":"Christine","full_name":"Silberhorn, Christine","id":"26263","last_name":"Silberhorn"}],"date_updated":"2025-12-19T11:37:41Z","intvolume":" 32","citation":{"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} }","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.","short":"R. Pollmann, F. Roeder, V. Quiring, R. Ricken, C. Eigner, B. Brecht, C. Silberhorn, Optics Express 32 (2024).","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","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","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.","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."},"publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","article_type":"original","article_number":"23945","department":[{"_id":"15"},{"_id":"623"},{"_id":"288"}],"user_id":"78890","_id":"54815","status":"public","type":"journal_article"},{"status":"public","abstract":[{"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.","lang":"eng"}],"publication":"New Journal of Physics","type":"journal_article","language":[{"iso":"eng"}],"article_number":"123025","article_type":"original","department":[{"_id":"288"},{"_id":"623"},{"_id":"15"}],"user_id":"78890","_id":"57862","project":[{"name":"MIRAQLS: MIRAQLS: Mid-infrared Quantum Technology for Sensing","_id":"571"},{"_id":"190","name":"E2TPA: Exploiting Entangled Two-Photon Absorption"}],"intvolume":" 26","citation":{"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","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).","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.","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} }","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.","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.","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"},"year":"2024","issue":"12","publication_identifier":{"issn":["1367-2630"]},"publication_status":"published","doi":"10.1088/1367-2630/ad9f98","title":"Ultra-broadband non-degenerate guided-wave bi-photon source in the near and mid-infrared","volume":26,"date_created":"2024-12-27T19:01:14Z","author":[{"first_name":"Franz","id":"88149","full_name":"Roeder, Franz","last_name":"Roeder"},{"full_name":"Gnanavel, Abira","last_name":"Gnanavel","first_name":"Abira"},{"first_name":"René","full_name":"Pollmann, René","id":"78890","last_name":"Pollmann"},{"first_name":"Olga","last_name":"Brecht","full_name":"Brecht, Olga"},{"first_name":"Michael","last_name":"Stefszky","id":"42777","full_name":"Stefszky, Michael"},{"last_name":"Padberg","full_name":"Padberg, Laura","id":"40300","first_name":"Laura"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","id":"13244","full_name":"Eigner, Christof"},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"},{"last_name":"Brecht","orcid":"0000-0003-4140-0556 ","id":"27150","full_name":"Brecht, Benjamin","first_name":"Benjamin"}],"date_updated":"2025-12-19T11:36:36Z","publisher":"IOP Publishing"},{"publication_identifier":{"issn":["2073-4352"]},"publication_status":"published","intvolume":" 13","citation":{"bibtex":"@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023, title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family}, volume={13}, DOI={10.3390/cryst13101423}, number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing, Michael}, year={2023} }","short":"S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).","mla":"Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” Crystals, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:10.3390/cryst13101423.","apa":"Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn, C., Eng, L. M., Schmidt, W. G., & Rüsing, M. (2023). Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. Crystals, 13(10), Article 1423. https://doi.org/10.3390/cryst13101423","ama":"Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. Crystals. 2023;13(10). doi:10.3390/cryst13101423","chicago":"Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” Crystals 13, no. 10 (2023). https://doi.org/10.3390/cryst13101423.","ieee":"S. Neufeld et al., “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family,” Crystals, vol. 13, no. 10, Art. no. 1423, 2023, doi: 10.3390/cryst13101423."},"volume":13,"author":[{"first_name":"Sergej","full_name":"Neufeld, Sergej","last_name":"Neufeld"},{"first_name":"Uwe","id":"171","full_name":"Gerstmann, Uwe","last_name":"Gerstmann","orcid":"0000-0002-4476-223X"},{"first_name":"Laura","last_name":"Padberg","id":"40300","full_name":"Padberg, Laura"},{"first_name":"Christof","full_name":"Eigner, Christof","id":"13244","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner"},{"full_name":"Berth, Gerhard","id":"53","last_name":"Berth","first_name":"Gerhard"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"},{"first_name":"Lukas M.","last_name":"Eng","full_name":"Eng, Lukas M."},{"orcid":"0000-0002-2717-5076","last_name":"Schmidt","id":"468","full_name":"Schmidt, Wolf Gero","first_name":"Wolf Gero"},{"first_name":"Michael","last_name":"Rüsing","orcid":"0000-0003-4682-4577","id":"22501","full_name":"Rüsing, Michael"}],"date_updated":"2023-10-11T09:15:58Z","oa":"1","doi":"10.3390/cryst13101423","main_file_link":[{"url":"https://doi.org/10.3390/cryst13101423","open_access":"1"}],"type":"journal_article","status":"public","department":[{"_id":"169"}],"user_id":"22501","_id":"47997","project":[{"grant_number":"231447078","_id":"168","name":"TRR 142 - B07: TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"name":"TRR 142 - B: TRR 142 - Project Area B","_id":"55"},{"grant_number":"PROFILNRW-2020-067","name":"PhoQC: PhoQC: Photonisches Quantencomputing","_id":"266"}],"funded_apc":"1","article_number":"1423","issue":"10","quality_controlled":"1","year":"2023","date_created":"2023-10-11T09:10:53Z","publisher":"MDPI AG","title":"Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family","publication":"Crystals","abstract":[{"text":"The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising material group for applications in quantum and nonlinear optics. The fabrication of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric domain structures, requires a profound understanding of the material properties and crystal structure. In this regard, Raman spectroscopy offers the possibility to study and visualize domain structures, strain, defects, and the local stoichiometry, which are all factors impacting device performance. However, the accurate interpretation of Raman spectra and their changes with respect to extrinsic and intrinsic defects requires a thorough assignment of the Raman modes to their respective crystal features, which to date is only partly conducted based on phenomenological modelling. To address this issue, we calculated the phonon spectra of potassium titanyl phosphate and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenate (KTiOAsO4) based on density functional theory and compared them with experimental data. Overall, this allows us to assign various spectral features to eigenmodes of lattice substructures with improved detail compared to previous assignments. Nevertheless, the analysis also shows that not all features of the spectra can unambigiously be explained yet. A possible explanation might be that defects or long range fields not included in the modeling play a crucial rule for the resulting Raman spectrum. In conclusion, this work provides an improved foundation into the vibrational properties in the KTiOPO4 material family.","lang":"eng"}],"language":[{"iso":"eng"}],"keyword":["Inorganic Chemistry","Condensed Matter Physics","General Materials Science","General Chemical Engineering"]},{"publisher":"Optica Publishing Group","date_updated":"2023-11-27T08:43:33Z","date_created":"2023-10-24T06:43:16Z","author":[{"id":"50819","full_name":"Thiele, Frederik","last_name":"Thiele","orcid":"0000-0003-0663-5587","first_name":"Frederik"},{"id":"83846","full_name":"Hummel, Thomas","last_name":"Hummel","first_name":"Thomas"},{"full_name":"McCaughan, Adam N.","last_name":"McCaughan","first_name":"Adam N."},{"full_name":"Brockmeier, Julian","id":"44807","last_name":"Brockmeier","first_name":"Julian"},{"last_name":"Protte","id":"46170","full_name":"Protte, Maximilian","first_name":"Maximilian"},{"first_name":"Victor","full_name":"Quiring, Victor","last_name":"Quiring"},{"last_name":"Lengeling","full_name":"Lengeling, Sebastian","id":"44373","first_name":"Sebastian"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","full_name":"Eigner, Christof","id":"13244"},{"first_name":"Christine","id":"26263","full_name":"Silberhorn, Christine","last_name":"Silberhorn"},{"first_name":"Tim","last_name":"Bartley","id":"49683","full_name":"Bartley, Tim"}],"volume":31,"title":"All optical operation of a superconducting photonic interface","doi":"10.1364/oe.492035","publication_status":"published","publication_identifier":{"issn":["1094-4087"]},"issue":"20","year":"2023","citation":{"ama":"Thiele F, Hummel T, McCaughan AN, et al. All optical operation of a superconducting photonic interface. Optics Express. 2023;31(20). doi:10.1364/oe.492035","chicago":"Thiele, Frederik, Thomas Hummel, Adam N. McCaughan, Julian Brockmeier, Maximilian Protte, Victor Quiring, Sebastian Lengeling, Christof Eigner, Christine Silberhorn, and Tim Bartley. “All Optical Operation of a Superconducting Photonic Interface.” Optics Express 31, no. 20 (2023). https://doi.org/10.1364/oe.492035.","ieee":"F. Thiele et al., “All optical operation of a superconducting photonic interface,” Optics Express, vol. 31, no. 20, Art. no. 32717, 2023, doi: 10.1364/oe.492035.","bibtex":"@article{Thiele_Hummel_McCaughan_Brockmeier_Protte_Quiring_Lengeling_Eigner_Silberhorn_Bartley_2023, title={All optical operation of a superconducting photonic interface}, volume={31}, DOI={10.1364/oe.492035}, number={2032717}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Thiele, Frederik and Hummel, Thomas and McCaughan, Adam N. and Brockmeier, Julian and Protte, Maximilian and Quiring, Victor and Lengeling, Sebastian and Eigner, Christof and Silberhorn, Christine and Bartley, Tim}, year={2023} }","mla":"Thiele, Frederik, et al. “All Optical Operation of a Superconducting Photonic Interface.” Optics Express, vol. 31, no. 20, 32717, Optica Publishing Group, 2023, doi:10.1364/oe.492035.","short":"F. Thiele, T. Hummel, A.N. McCaughan, J. Brockmeier, M. Protte, V. Quiring, S. Lengeling, C. Eigner, C. Silberhorn, T. Bartley, Optics Express 31 (2023).","apa":"Thiele, F., Hummel, T., McCaughan, A. N., Brockmeier, J., Protte, M., Quiring, V., Lengeling, S., Eigner, C., Silberhorn, C., & Bartley, T. (2023). All optical operation of a superconducting photonic interface. Optics Express, 31(20), Article 32717. https://doi.org/10.1364/oe.492035"},"intvolume":" 31","_id":"48399","user_id":"50819","article_number":"32717","keyword":["Atomic and Molecular Physics","and Optics"],"language":[{"iso":"eng"}],"type":"journal_article","publication":"Optics Express","abstract":[{"lang":"eng","text":"Quantum photonic processing via electro-optic components typically requires electronic links across different operation environments, especially when interfacing cryogenic components such as superconducting single photon detectors with room-temperature control and readout electronics. However, readout and driving electronics can introduce detrimental parasitic effects. Here we show an all-optical control and readout of a superconducting nanowire single photon detector (SNSPD), completely electrically decoupled from room temperature electronics. We provide the operation power for the superconducting detector via a cryogenic photodiode, and readout single photon detection signals via a cryogenic electro-optic modulator in the same cryostat. This method opens the possibility for control and readout of superconducting circuits, and feedforward for photonic quantum computing."}],"status":"public"},{"abstract":[{"lang":"eng","text":"The crystal family of potassium titanyl phosphate (KTiOPO4) is a promising material group for applications in quantum and nonlinear optics. The fabrication of low-loss optical waveguides, as well as high-grade periodically poled ferroelectric domain structures, requires a profound understanding of the material properties and crystal structure. In this regard, Raman spectroscopy offers the possibility to study and visualize domain structures, strain, defects, and the local stoichiometry, which are all factors impacting device performance. However, the accurate interpretation of Raman spectra and their changes with respect to extrinsic and intrinsic defects requires a thorough assignment of the Raman modes to their respective crystal features, which to date is only partly conducted based on phenomenological modelling. To address this issue, we calculated the phonon spectra of potassium titanyl phosphate and the related compounds rubidium titanyl phosphate (RbTiOPO4) and potassium titanyl arsenate (KTiOAsO4) based on density functional theory and compared them with experimental data. Overall, this allows us to assign various spectral features to eigenmodes of lattice substructures with improved detail compared to previous assignments. Nevertheless, the analysis also shows that not all features of the spectra can unambigiously be explained yet. A possible explanation might be that defects or long range fields not included in the modeling play a crucial rule for the resulting Raman spectrum. In conclusion, this work provides an improved foundation into the vibrational properties in the KTiOPO4 material family."}],"status":"public","publication":"Crystals","type":"journal_article","article_number":"1423","language":[{"iso":"eng"}],"_id":"54852","project":[{"grant_number":"231447078","name":"TRR 142: TRR 142 - Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen","_id":"53"}],"department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"288"},{"_id":"230"},{"_id":"429"}],"user_id":"16199","year":"2023","intvolume":" 13","citation":{"apa":"Neufeld, S., Gerstmann, U., Padberg, L., Eigner, C., Berth, G., Silberhorn, C., Eng, L. M., Schmidt, W. G., & Rüsing, M. (2023). Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. Crystals, 13(10), Article 1423. https://doi.org/10.3390/cryst13101423","mla":"Neufeld, Sergej, et al. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” Crystals, vol. 13, no. 10, 1423, MDPI AG, 2023, doi:10.3390/cryst13101423.","bibtex":"@article{Neufeld_Gerstmann_Padberg_Eigner_Berth_Silberhorn_Eng_Schmidt_Rüsing_2023, title={Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family}, volume={13}, DOI={10.3390/cryst13101423}, number={101423}, journal={Crystals}, publisher={MDPI AG}, author={Neufeld, Sergej and Gerstmann, Uwe and Padberg, Laura and Eigner, Christof and Berth, Gerhard and Silberhorn, Christine and Eng, Lukas M. and Schmidt, Wolf Gero and Rüsing, Michael}, year={2023} }","short":"S. Neufeld, U. Gerstmann, L. Padberg, C. Eigner, G. Berth, C. Silberhorn, L.M. Eng, W.G. Schmidt, M. Rüsing, Crystals 13 (2023).","ama":"Neufeld S, Gerstmann U, Padberg L, et al. Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family. Crystals. 2023;13(10). doi:10.3390/cryst13101423","chicago":"Neufeld, Sergej, Uwe Gerstmann, Laura Padberg, Christof Eigner, Gerhard Berth, Christine Silberhorn, Lukas M. Eng, Wolf Gero Schmidt, and Michael Rüsing. “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family.” Crystals 13, no. 10 (2023). https://doi.org/10.3390/cryst13101423.","ieee":"S. Neufeld et al., “Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family,” Crystals, vol. 13, no. 10, Art. no. 1423, 2023, doi: 10.3390/cryst13101423."},"publication_identifier":{"issn":["2073-4352"]},"publication_status":"published","issue":"10","title":"Vibrational Properties of the Potassium Titanyl Phosphate Crystal Family","doi":"10.3390/cryst13101423","date_updated":"2024-06-24T06:30:23Z","publisher":"MDPI AG","volume":13,"author":[{"first_name":"Sergej","full_name":"Neufeld, Sergej","last_name":"Neufeld"},{"id":"171","full_name":"Gerstmann, Uwe","orcid":"0000-0002-4476-223X","last_name":"Gerstmann","first_name":"Uwe"},{"first_name":"Laura","full_name":"Padberg, Laura","id":"40300","last_name":"Padberg"},{"first_name":"Christof","orcid":"https://orcid.org/0000-0002-5693-3083","last_name":"Eigner","id":"13244","full_name":"Eigner, Christof"},{"id":"53","full_name":"Berth, Gerhard","last_name":"Berth","first_name":"Gerhard"},{"first_name":"Christine","last_name":"Silberhorn","full_name":"Silberhorn, Christine","id":"26263"},{"full_name":"Eng, Lukas M.","last_name":"Eng","first_name":"Lukas M."},{"full_name":"Schmidt, Wolf Gero","id":"468","last_name":"Schmidt","orcid":"0000-0002-2717-5076","first_name":"Wolf Gero"},{"first_name":"Michael","full_name":"Rüsing, Michael","id":"22501","last_name":"Rüsing","orcid":"0000-0003-4682-4577"}],"date_created":"2024-06-24T06:15:00Z"},{"publication":"Optics Express","type":"journal_article","status":"public","abstract":[{"lang":"eng","text":"Interference between single photons is key for many quantum optics experiments and applications in quantum technologies, such as quantum communication or computation. It is advantageous to operate the systems at telecommunication wavelengths and to integrate the setups for these applications in order to improve stability, compactness and scalability. A new promising material platform for integrated quantum optics is lithium niobate on insulator (LNOI). Here, we realise Hong-Ou-Mandel (HOM) interference between telecom photons from an engineered parametric down-conversion source in an LNOI directional coupler. The coupler has been designed and fabricated in house and provides close to perfect balanced beam splitting. We obtain a raw HOM visibility of (93.5 ± 0.7) %, limited mainly by the source performance and in good agreement with off-chip measurements. This lays the foundation for more sophisticated quantum experiments in LNOI."}],"department":[{"_id":"15"},{"_id":"230"},{"_id":"623"},{"_id":"288"}],"user_id":"63231","_id":"45850","language":[{"iso":"eng"}],"keyword":["Atomic and Molecular Physics","and Optics"],"article_number":"23140","issue":"14","publication_identifier":{"issn":["1094-4087"]},"publication_status":"published","intvolume":" 31","citation":{"chicago":"Babel, Silia, Laura Bollmers, Marcello Massaro, Kai Hong Luo, Michael Stefszky, Federico Pegoraro, Philip Held, et al. “Demonstration of Hong-Ou-Mandel Interference in an LNOI Directional Coupler.” Optics Express 31, no. 14 (2023). https://doi.org/10.1364/oe.484126.","ieee":"S. Babel et al., “Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler,” Optics Express, vol. 31, no. 14, Art. no. 23140, 2023, doi: 10.1364/oe.484126.","ama":"Babel S, Bollmers L, Massaro M, et al. Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler. Optics Express. 2023;31(14). doi:10.1364/oe.484126","apa":"Babel, S., Bollmers, L., Massaro, M., Luo, K. H., Stefszky, M., Pegoraro, F., Held, P., Herrmann, H., Eigner, C., Brecht, B., Padberg, L., & Silberhorn, C. (2023). Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler. Optics Express, 31(14), Article 23140. https://doi.org/10.1364/oe.484126","mla":"Babel, Silia, et al. “Demonstration of Hong-Ou-Mandel Interference in an LNOI Directional Coupler.” Optics Express, vol. 31, no. 14, 23140, Optica Publishing Group, 2023, doi:10.1364/oe.484126.","bibtex":"@article{Babel_Bollmers_Massaro_Luo_Stefszky_Pegoraro_Held_Herrmann_Eigner_Brecht_et al._2023, title={Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler}, volume={31}, DOI={10.1364/oe.484126}, number={1423140}, journal={Optics Express}, publisher={Optica Publishing Group}, author={Babel, Silia and Bollmers, Laura and Massaro, Marcello and Luo, Kai Hong and Stefszky, Michael and Pegoraro, Federico and Held, Philip and Herrmann, Harald and Eigner, Christof and Brecht, Benjamin and et al.}, year={2023} }","short":"S. Babel, L. Bollmers, M. Massaro, K.H. Luo, M. Stefszky, F. Pegoraro, P. Held, H. Herrmann, C. Eigner, B. Brecht, L. Padberg, C. Silberhorn, Optics Express 31 (2023)."},"year":"2023","volume":31,"date_created":"2023-07-03T14:08:36Z","author":[{"first_name":"Silia","orcid":"https://orcid.org/0000-0002-1568-2580","last_name":"Babel","full_name":"Babel, Silia","id":"63231"},{"first_name":"Laura","last_name":"Bollmers","full_name":"Bollmers, Laura","id":"61375"},{"full_name":"Massaro, Marcello","id":"59545","last_name":"Massaro","orcid":"0000-0002-2539-7652","first_name":"Marcello"},{"first_name":"Kai Hong","id":"36389","full_name":"Luo, Kai Hong","orcid":"0000-0003-1008-4976","last_name":"Luo"},{"first_name":"Michael","id":"42777","full_name":"Stefszky, Michael","last_name":"Stefszky"},{"first_name":"Federico","id":"88928","full_name":"Pegoraro, Federico","last_name":"Pegoraro"},{"id":"68236","full_name":"Held, Philip","last_name":"Held","first_name":"Philip"},{"full_name":"Herrmann, Harald","id":"216","last_name":"Herrmann","first_name":"Harald"},{"first_name":"Christof","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","id":"13244","full_name":"Eigner, Christof"},{"last_name":"Brecht","orcid":"0000-0003-4140-0556 ","id":"27150","full_name":"Brecht, Benjamin","first_name":"Benjamin"},{"last_name":"Padberg","full_name":"Padberg, Laura","id":"40300","first_name":"Laura"},{"last_name":"Silberhorn","id":"26263","full_name":"Silberhorn, Christine","first_name":"Christine"}],"date_updated":"2023-07-05T07:58:31Z","publisher":"Optica Publishing Group","doi":"10.1364/oe.484126","title":"Demonstration of Hong-Ou-Mandel interference in an LNOI directional coupler"},{"language":[{"iso":"eng"}],"project":[{"_id":"52","name":"Computing Resources Provided by the Paderborn Center for Parallel Computing"},{"_id":"53","name":"TRR 142: Maßgeschneiderte nichtlineare Photonik: Von grundlegenden Konzepten zu funktionellen Strukturen"},{"name":"TRR 142 - Project Area A","_id":"54"},{"name":"TRR 142 - Project Area B","_id":"55"},{"_id":"168","name":"TRR 142 - Polaronen-Einfluss auf die optischen Eigenschaften von Lithiumniobat (B07*)"},{"name":"TRR 142 - Subproject A11","_id":"166"}],"_id":"61362","user_id":"16199","department":[{"_id":"15"},{"_id":"170"},{"_id":"295"},{"_id":"790"},{"_id":"288"},{"_id":"230"},{"_id":"429"},{"_id":"35"},{"_id":"27"}],"abstract":[{"text":"We study the interaction of gray tracking and DC ionic conductivity in Potassium Titanyl Phosphate (KTiOPO4, KTP) and present a novel way to reduce conductivity via a potassium nitrate treatment improving the device quality.","lang":"eng"}],"status":"public","type":"conference","publication":"CLEO 2023","title":"Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance","doi":"10.1364/cleo_at.2023.jw2a.57","date_updated":"2025-09-18T12:08:56Z","publisher":"Optica Publishing Group","date_created":"2025-09-18T12:06:19Z","author":[{"full_name":"Eigner, Christof","id":"13244","last_name":"Eigner","orcid":"https://orcid.org/0000-0002-5693-3083","first_name":"Christof"},{"last_name":"Padberg","full_name":"Padberg, Laura","id":"40300","first_name":"Laura"},{"first_name":"Viktor","last_name":"Quiring","full_name":"Quiring, Viktor"},{"full_name":"Bocchini, Adriana","id":"58349","orcid":"0000-0002-2134-3075","last_name":"Bocchini","first_name":"Adriana"},{"first_name":"Matteo","id":"55095","full_name":"Santandrea, Matteo","orcid":"0000-0001-5718-358X","last_name":"Santandrea"},{"first_name":"Uwe","full_name":"Gerstmann, Uwe","id":"171","orcid":"0000-0002-4476-223X","last_name":"Gerstmann"},{"first_name":"Wolf Gero","id":"468","full_name":"Schmidt, Wolf Gero","orcid":"0000-0002-2717-5076","last_name":"Schmidt"},{"full_name":"Silberhorn, Christine","id":"26263","last_name":"Silberhorn","first_name":"Christine"}],"year":"2023","citation":{"chicago":"Eigner, Christof, Laura Padberg, Viktor Quiring, Adriana Bocchini, Matteo Santandrea, Uwe Gerstmann, Wolf Gero Schmidt, and Christine Silberhorn. “Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance.” In CLEO 2023. Optica Publishing Group, 2023. https://doi.org/10.1364/cleo_at.2023.jw2a.57.","ieee":"C. Eigner et al., “Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance,” 2023, doi: 10.1364/cleo_at.2023.jw2a.57.","ama":"Eigner C, Padberg L, Quiring V, et al. Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance. In: CLEO 2023. Optica Publishing Group; 2023. doi:10.1364/cleo_at.2023.jw2a.57","apa":"Eigner, C., Padberg, L., Quiring, V., Bocchini, A., Santandrea, M., Gerstmann, U., Schmidt, W. G., & Silberhorn, C. (2023). Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance. CLEO 2023. https://doi.org/10.1364/cleo_at.2023.jw2a.57","bibtex":"@inproceedings{Eigner_Padberg_Quiring_Bocchini_Santandrea_Gerstmann_Schmidt_Silberhorn_2023, title={Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance}, DOI={10.1364/cleo_at.2023.jw2a.57}, booktitle={CLEO 2023}, publisher={Optica Publishing Group}, author={Eigner, Christof and Padberg, Laura and Quiring, Viktor and Bocchini, Adriana and Santandrea, Matteo and Gerstmann, Uwe and Schmidt, Wolf Gero and Silberhorn, Christine}, year={2023} }","mla":"Eigner, Christof, et al. “Potassium Titanyl Phosphate Material Engineering Boosting Integrated Optical Source Performance.” CLEO 2023, Optica Publishing Group, 2023, doi:10.1364/cleo_at.2023.jw2a.57.","short":"C. Eigner, L. Padberg, V. Quiring, A. Bocchini, M. Santandrea, U. Gerstmann, W.G. Schmidt, C. Silberhorn, in: CLEO 2023, Optica Publishing Group, 2023."},"publication_status":"published"}]