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High-efficiency WSi superconducting nanowire single-photon detectors operating at 2.5 K

Published

Author(s)

Varun B. Verma, Boris Korzh, Felix Bussieres, Robert D. Horansky, Adriana E. Lita, Francesco Marsili, Hugo Zbinden, Richard P. Mirin, Sae Woo Nam

Abstract

We demonstrate that superconducting nanowire single photon detectors (SNSPDs) fabricated from amorphous WSi may be operated with > 75 % system detection efficiency at a temperature approaching seventy percent of the superconducting transition temperature (TC) of the material (2.5 K operation with a transition temperature of 3.4 K). This is in contrast to SNSPDs fabricated from NbN, which typically show a strong degradation in efficiency as the operating temperature approaches TC.
Citation
Applied Physics Letters
Volume
105
Issue
12

Keywords

nanowire, superconductor, SNSPD, SSPD

Citation

Verma, V. , Korzh, B. , Bussieres, F. , Horansky, R. , Lita, A. , Marsili, F. , Zbinden, H. , Mirin, R. and Nam, S. (2014), High-efficiency WSi superconducting nanowire single-photon detectors operating at 2.5 K, Applied Physics Letters, [online], https://doi.org/10.1063/1.4896045 (Accessed May 22, 2024)

Issues

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Created September 24, 2014, Updated November 10, 2018