Paper Abstract and Keywords |
Presentation |
2011-10-12 13:00
Origin of dark count in superconducting nanowire single-photon detectors Taro Yamashita, Shigehito Miki, Kazumasa Makise, Wei Qiu, Hirotaka Terai, Mikio Fujiwara, Masahide Sasaki, Zhen Wang (NICT) SCE2011-12 Link to ES Tech. Rep. Archives: SCE2011-12 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
We investigated a physical mechanism of the dark count in superconducting nanowire single-photon detectors. The direct-current characteristics and bias-current dependencies of the dark count rate in a wide range of temperatures from 0.5 K to 4 K were measured. As a candidate for the origin of the dark count, we examined two possible mechanisms: (i) the current-assisted unbinding of vortex-antivortex pairs induced by the Berezinskii-Kosterlitz-Thouless transition and (ii) the vortex hopping overcoming the edge barrier of the nanowire. Our results indicate that the unbinding of vortex-antivortex pairs is the dominant origin of the dark count. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
single-photon detector / superconducting thin film / fluctuation / / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 111, no. 230, SCE2011-12, pp. 1-6, Oct. 2011. |
Paper # |
SCE2011-12 |
Date of Issue |
2011-10-05 (SCE) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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SCE2011-12 Link to ES Tech. Rep. Archives: SCE2011-12 |