NbN single-photon detectors with saturated dependence of quantum efficiency

被引：52

作者：

Smirnov, Konstantin ^{[1
,2
,3
]}

Divochiy, Alexander ^{[2
]}

Vakhtomin, Yury ^{[1
,2
]}

Morozov, Pavel ^{[2
]}

Zolotov, Philipp ^{[1
,2
,3
]}

Antipov, Andrey ^{[2
]}

Seleznev, Vitaliy ^{[1
,2
]}

机构：

[1] Moscow State Pedag Univ, Moscow 119991, Russia

[2] LLC Superconducting Nanotechnol SCONTEL, Moscow 119021, Russia

[3] Natl Res Univ, Higher Sch Econ, Moscow 101000, Russia

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2018年 / 31卷 / 03期

关键词：

quantum efficiency; superconducting single-photon detectors; NbN thin films; FLUCTUATION; SUPERCONDUCTIVITY; CONDUCTIVITY;

D O I：

10.1088/1361-6668/aaa7aa

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The possibility of creating NbN superconducting single-photon detectors with saturated dependence of quantum efficiency (QE) versus normalized bias current was investigated. It was shown that the saturation increases for the detectors based on finer films with a lower value of R-s300/R-s20. The decreasing of R-s300/R-s20 was related to the increasing influence of quantum corrections to conductivity of superconductors and, in turn, to the decrease of the electron diffusion coefficient. The best samples have a constant value of system QE 94% at I-b/I-c similar to 0.8 and wavelength 1310 nm.

引用

页数：8

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