Position-Dependent Local Detection Efficiency in a Nanowire Superconducting Single-Photon Detector.
NANO LETTERS 2015;
15:4541-4545. [PMID:
26087352 DOI:
10.1021/acs.nanolett.5b01103]
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Abstract
We probe the local detection efficiency in a nanowire superconducting single-photon detector along the cross-section of the wire with a far subwavelength resolution. 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 a function of device geometry.
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