Optical Single-Photon Detection in Micrometer-Scale NbN Bridges

Journal article (2018)

Authors

Yu P. Korneeva Chemistry Faculty of M. V. Lomonosov Moscow State University
D. Yu Vodolazov Russian Academy of Sciences, Chemistry Faculty of M. V. Lomonosov Moscow State University
A. V. Semenov Chemistry Faculty of M. V. Lomonosov Moscow State University
I. N. Florya Chemistry Faculty of M. V. Lomonosov Moscow State University
N. Simonov Chemistry Faculty of M. V. Lomonosov Moscow State University
E. Baeva National Research University Higher School of Economics, Chemistry Faculty of M. V. Lomonosov Moscow State University
A. A. Korneev Chemistry Faculty of M. V. Lomonosov Moscow State University, National Research University Higher School of Economics
Gregory Goltsman Chemistry Faculty of M. V. Lomonosov Moscow State University, National Research University Higher School of Economics
T.M. Klapwijk Kavli institute of nanoscience Delft, Chemistry Faculty of M. V. Lomonosov Moscow State University, QN/Klapwijk Lab
Research Group
QN/Klapwijk Lab
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Published Date

2018

Language

English

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Research Group

QN/Klapwijk Lab

Abstract

We demonstrate experimentally that single-photon detection can be achieved in micrometer-wide NbN bridges, with widths ranging from 0.53 to 5.15 μm and for photon wavelengths of 408 to 1550 nm. The microbridges are biased with a dc current close to the experimental critical current, which is estimated to be about 50% of the theoretically expected depairing current. These results offer an alternative to the standard superconducting single-photon detectors, based on nanometer-scale nanowires implemented in a long meandering structure. The results are consistent with improved theoretical modeling based on the theory of nonequilibrium superconductivity, including the vortex-assisted mechanism of initial dissipation.

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PhysRevApplied.9.064037.pdf
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