Position-Dependent Local Detection Efficiency in a Nanowire Superconducting Single-Photon Detector
Jelmer J. Renema, Qiang Wang, Rosalinda Gaudio, Irina Komen, Koen op, 't Hoog, Dondu Sahin, Andreas Schilling, Martin P. van Exter, Andrea Fiore,, Andreas Engel, Michiel J.A. de Dood
TL;DR
This study investigates how the local detection efficiency varies along a nanowire superconducting single-photon detector, revealing significant position-dependent effects that influence overall device performance.
Contribution
The paper provides the first detailed spatial resolution measurement of local detection efficiency in a nanowire superconducting detector, linking geometry to efficiency variations.
Findings
Detection efficiency varies strongly along the nanowire
Position-dependent effects explain previous efficiency variations
Spatial resolution of 10 nm reveals local efficiency changes
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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Taxonomy
TopicsQuantum Information and Cryptography · Advanced Optical Sensing Technologies · Electronic and Structural Properties of Oxides