Tailoring Superconducting Nanowire Single-Photon Detectors for Quantum Technologies

Lucio Zugliani, Christian Schmid, Fabian Wietschorke, Björn Jonas, Simone Spedicato, Stefan Strohauer, Stefanie Grotowski, Rasmus Flaschmann, Manuel Müller, Matthias Althammer, Rudolf Gross, Jonathan Finley, Kai Müller

Publikation: Beitrag in Buch/Bericht/KonferenzbandKonferenzbeitragBegutachtung

Abstract

Superconducting nanowire single-photon detectors (SNSPDs) are a key building block for photonic quantum technologies, as they provide a means for efficient readout of optical circuits with low timing jitter, dark counts and dead time. In this contribution we give a general overview of the working principle of these devices and look into several engineering aspects. We discuss the influence of the stoichiometry of NbTiN thin-films on detector performance and find that a ratio of 65:35 Nb:Ti results in the highest saturation of SNSPDs fabricated from these films. Furthermore, we study the impact of helium ion irradiation on the efficiency of SNSPDs. We show that with this technique the efficiency of an SNSPD can be improved from below 1% to 42%. Finally, we discuss the impact of embedding the SNSPDs into an optical cavity on the system detection efficiency. By employing a half-cavity under the detector we are able to boost the efficiency from 30% to 50% for a detector with a fill factor of 0.33.

OriginalspracheEnglisch
Titel2023 IEEE Globecom Workshops, GC Wkshps 2023
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers Inc.
Seiten1051-1056
Seitenumfang6
ISBN (elektronisch)9798350370218
DOIs
PublikationsstatusVeröffentlicht - 2023
Veranstaltung2023 IEEE Globecom Workshops, GC Wkshps 2023 - Kuala Lumpur, Malaysia
Dauer: 4 Dez. 20238 Dez. 2023

Publikationsreihe

Name2023 IEEE Globecom Workshops, GC Wkshps 2023

Konferenz

Konferenz2023 IEEE Globecom Workshops, GC Wkshps 2023
Land/GebietMalaysia
OrtKuala Lumpur
Zeitraum4/12/238/12/23

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