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5 October 2023 Superconducting single-photon detectors on lithium niobate-on-insulator
Christian Schmid, Fabian Wietschorke, Rasmus Flaschmann, Lucio Zugliani, Stefan Strohauer, Stefanie Grotowski, Jonathan Finley, Kai Müller
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Proceedings Volume PC12657, Quantum Nanophotonic Materials, Devices, and Systems 2023; PC126570E (2023) https://doi.org/10.1117/12.2682733
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
Superconducting nanowire single-photon detectors (SNSPDs) are a key building block in photon-based quantum computation and communication. To realize a scalable photonic device, integration of SNSPDs on waveguides is necessary. Hereby, one of the most promising waveguide materials is lithium niobate-on-insulator (LNOI). To find the ideal superconductor growth conditions, in this case NbTiN on LNOI, we created a series of superconducting films, while varying the superconductors stoichiometry. Here, the produced SNSPDs become more sensitive at a higher nitrogen content, while for lower amounts of nitrogen the recovery time is reduced, allowing for a direct correlation of sputter conditions and SNSPD performance.
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Christian Schmid, Fabian Wietschorke, Rasmus Flaschmann, Lucio Zugliani, Stefan Strohauer, Stefanie Grotowski, Jonathan Finley, and Kai Müller "Superconducting single-photon detectors on lithium niobate-on-insulator", Proc. SPIE PC12657, Quantum Nanophotonic Materials, Devices, and Systems 2023, PC126570E (5 October 2023); https://doi.org/10.1117/12.2682733
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KEYWORDS
Superconductors
Lithium
Single photon detectors
Thin films
Waveguides
Crystals
Magnetism
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