Regensburg 2022 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 17: Cryogenic Detectors and Cryotechnique
TT 17.7: Vortrag
Mittwoch, 7. September 2022, 11:15–11:30, H22
Superconducting single-photon detectors on lithium-niobate-on-insulator — •Christian Schmid1, Rasmus Flaschmann1, Lucio Zugliani1, Stefan Strohauer2, Björn Jonas1, Fabian Wietschorke1, Sven Ernst2, Stefanie Grotowski2, Simone Speticato2, Mirco Metz1, Kai Müller1, and Jonathan Finley2 — 1Walter Schottky Institute and Department for Electrical and Computer Engineering, Technical University of Munich, Germany — 2Walter Schottky Institute and Physics Department, Technical University of Munich, Germany
Superconducting single-photon detectors (SSPDs) are a key building block in photon-based quantum computation and communication. To realize a scalable photonic quantum computer, integration of single-photon sources, electronics and crucially SSPDs is necessary. One of the most promising material platforms for quantum photonic integration is lithium-niobate-on-insulator (LNOI), which offers a broad optical window and a large non-linearity.
In this work, we present the thin film superconducting properties of NbTiN grown on crystalline LNOI and compare them to films deposited on amorphous Si/SiO2 wafer. SSPDs fabricated from films on both substrates are further characterized with respect to their quantum efficiency, dark count rate, recovery time and timing jitter.