Investigation of the Performance of an Ultralow-Dark-Count Superconducting Nanowire Single-Photon Detector

被引：7
作者：
Subashchandran, Shanthi [1 ,2 ]
Okamoto, Ryo [1 ,2 ]
Zhang, Labao [3 ]
Tanaka, Akira [1 ,2 ]
Okano, Masayuki [1 ,2 ]
Kang, Lin [3 ]
Chen, Jian [3 ]
Wu, Peiheng [3 ]
Takeuchi, Shigeki [1 ,2 ]
机构：
[1] Hokkaido Univ, Res Inst Elect Sci, Sapporo, Hokkaido 0010020, Japan
[2] Osaka Univ, Inst Sci & Ind Res, Ibaraki, Osaka 5670047, Japan
[3] Nanjing Univ, Res Inst Superconductor Elect, Nanjing 210093, Jiangsu, Peoples R China
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2013年 / 52卷 / 10期
基金：
日本学术振兴会;
关键词：
PARAMETRIC FLUORESCENCE; EFFICIENCY; BAND; NBN;
D O I：
10.7567/JJAP.52.102801
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The realization of an ultralow-dark-count rate (DCR) along with the conservation of high detection efficiency (DE) is critical for many applications using single photon detectors in quantum information technologies, material sciences, and biological sensing. For this purpose, a fiber-coupled superconducting nanowire single-photon detector (SNSPD) with a meander-type niobium nitride nanowire (width: 50 nm) is studied. Precise measurements of the bias current dependence of DE are carried out for a wide spectral range (from 500 to 1650 nm in steps of 50 nm) using a white light source and a laser line Bragg tunable band-pass filter. An ultralow DCR (0.0015 cps) and high DE (32%) are simultaneously achieved by the SNSPD at a wavelength of 500 nm. (C) 2013 The Japan Society of Applied Physics
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页数：5
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