Position-Dependent Local Detection Efficiency in a Nanowire Superconducting Single-Photon Detector

Abstract

We probe the local detection efficiency in a nanowire superconducting single-photon detector along the cross-section of the wire with a spatial resolution of 10 nm. We experimentally find a strong variation in the local detection efficiency of the device. We demonstrate that this effect explains previously observed variations in NbN detector efficiency as function of device geometry.

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• Experimental investigation of the detection mechanism in WSi nanowire superconducting single photon detectors
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• Bridging Superconductors with UN Development Goals: Perspectives and Applications
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