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Position-Dependent Local Detection Efficiency in a Nanowire Superconducting Single-Photon Detector
J J Renema1, Q Wang1, R Gaudio2
1†Leiden Institute of Physics, Leiden University, Niels Bohrweg 2, 2333 CA Leiden, The Netherlands.
Nano Letters
|June 19, 2015
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.
