Regensburg 2022 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 36: Materials and Devices for Quantum Technology 2
HL 36.4: Vortrag
Donnerstag, 8. September 2022, 15:45–16:00, H36
Superconducting single-photon detectors made of NbTiN using a novel method to characterize the timing jitter — •Lucio Zugliani1, Rasmus Flaschmann1, Stefan Strohauer2, Christian Schmid1, Fabian Wietschorke1, Stefanie Grotowski2, Sven Ernst2, Simone Spedicato2, Mirco Metz1, Björn Jonas1, Jonathan Finley2, and Kai Müller1 — 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
In recent years, superconducting single-photon detectors (SSPDs) have raised tremendous attention as a key technology for optical quantum processing and faint light detection. With their unparalleled performances to detect single photons, further investigation of these detectors is of high interest [1, 2].
Here, we present our recent progress on NbTiN SSPDs measured at 4.5K. We discuss our approaches to improve the most important figures of merit (dark count rate, dead time, timing jitter, efficiency) including an optimization of the quality of the superconducting NbTiN films and the integration of the detector in a broad-band cavity.
In particular, we focus on the impact of the substrate material on the resulting parameters such as the detected voltage pulse. We investigate the characteristic of pulse height, rise time and timing jitter, finding a relation between the timing jitter and the pulse properties.
[1]*C. Natarajan et al., Sup. Sci. and Tech. 25, 063001 (2012)
[2]*I. Zadeh, Appl. Phys. Lett. 118, 190502 (2021)