Origin of intrinsic dark count in superconducting nanowire single-photon detectors
Origin of intrinsic dark count in superconducting nanowire single-photon detectors
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DOI：
10.1063/1.3652908
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发表时间：
2011-03
影响因子：
4
通讯作者：
T. Yamashita;S. Miki;K. Makise;W. Qiu;H. Terai;M. Fujiwara;M. Sasaki;Z. Wang
中科院分区：
文献类型：
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作者：
T. Yamashita;S. Miki;K. Makise;W. Qiu;H. Terai;M. Fujiwara;M. Sasaki;Z. Wang
研究了超导纳米线单光子探测器退相干的起源，即所谓的暗计数。在0.5 K ~ 4.0 K的温度范围内测量了暗计数率的直流特性和偏置电流依赖关系，并通过涡流热波动的理论模型分析了结果。我们的结果表明，涡旋-反涡旋对的电流辅助解结是暗计数的主要来源。
The origin of the decoherence in superconducting nanowire single-photon detectors, the so-called dark count, was investigated. We measured the direct-current characteristics and bias-current dependencies of the dark count rate in a wide range of temperatures from 0.5 K to 4.0 K, and analyzed the results by theoretical models of thermal fluctuations of vortices. Our results indicate that the current-assisted unbinding of vortex-antivortex pairs is the dominant origin of the dark count.