Probing the hotspot interaction length in NbN nanowire superconducting single photon detectors
Probing the hotspot interaction length in NbN nanowire superconducting single photon detectors
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DOI：
10.1063/1.4984816
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发表时间：
2016-07
影响因子：
4
通讯作者：
J. Renema;R. Gaudio;Q. Wang;M. V. Exter;A. Fiore;M. D. Dood
中科院分区：
文献类型：
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作者：
J. Renema;R. Gaudio;Q. Wang;M. V. Exter;A. Fiore;M. D. Dood
我们测量的最大距离，在这两个吸收的光子可以联合触发检测事件在NbN纳米线超导单光子探测器微桥通过比较的单光子和双光子的效率不同的总长度的桥梁，从0到400 nm。我们发现长度为23 ± 2 nm。这个值是在良好的协议与准粒子云的大小在检测事件的时间。
We measure the maximal distance at which two absorbed photons can jointly trigger a detection event in NbN nanowire superconducting single photon detector microbridges by comparing the one-photon and two-photon efficiencies of bridges of different overall lengths, from 0 to 400 nm. We find a length of 23 ± 2 nm. This value is in good agreement with the size of the quasiparticle cloud at the time of the detection event.