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

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

We investigate the operation of WSi superconducting nanowire single-photon detectors (SNSPDs) at 2.5 K, a temperature which is ~ 70 % of the superconducting transition temperature (TC) of 3.4 K. We demonstrate saturation of the system detection efficiency at 78 +- 2 % with a jitter of 191 ps. We fin...

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Bibliographic Details
Main Authors: Verma, V. B, Korzh, B, Bussières, F, Horansky, R. D, Lita, A. E, Marsili, F, Shaw, M. D, Zbinden, H, Mirin, R. P, Nam, S. W
Format: Journal Article
Language:English
Published: 06-06-2014
Subjects:
Physics - Optics
Physics - Superconductivity
Online Access:Get full text
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Summary:We investigate the operation of WSi superconducting nanowire single-photon detectors (SNSPDs) at 2.5 K, a temperature which is ~ 70 % of the superconducting transition temperature (TC) of 3.4 K. We demonstrate saturation of the system detection efficiency at 78 +- 2 % with a jitter of 191 ps. We find that the jitter at 2.5 K is limited by the noise of the readout, and can be improved through the use of cryogenic amplifiers. Operation of SNSPDs with high efficiency at temperatures very close to TC appears to be a unique property of amorphous WSi.
DOI:10.48550/arxiv.1406.1810