采用吉福德-麦克马洪低温制冷机的高性能光纤耦合铌钛氮超导纳米线单光子探测器。

High performance fiber-coupled NbTiN superconducting nanowire single photon detectors with Gifford-McMahon cryocooler.

作者信息

Miki Shigehito, Yamashita Taro, Terai Hirotaka, Wang Zhen

机构信息

Advanced ICT Research Institute, National Institute of Information and Communications Technology, 588-2, Iwaoka, Kobe, Hyogo 651-2492, Japan.

出版信息

Opt Express. 2013 Apr 22;21(8):10208-14. doi: 10.1364/OE.21.010208.

DOI:10.1364/OE.21.010208

PMID:23609728

Abstract

We present high performance fiber-coupled niobium titanium nitride superconducting nanowire single photon detectors fabricated on thermally oxidized silicon substrates. The best device showed a system detection efficiency (DE) of 74%, dark count rate of 100 c/s, and full width at half maximum timing jitter of 68 ps under a bias current of 18.0 μA with a practical Gifford-McMahon cryocooler system. We also introduced six detectors into the cryocooler and confirmed that the system DE of all detectors was higher than 67% at the dark count rate of 100 c/s.

摘要

我们展示了在热氧化硅衬底上制造的高性能光纤耦合铌钛氮化物超导纳米线单光子探测器。在使用实际的吉福德-麦克马洪低温制冷器系统、偏置电流为18.0 μA的情况下，最佳器件的系统探测效率（DE）为74%，暗计数率为100次/秒，半高宽定时抖动为68皮秒。我们还将六个探测器引入低温制冷器，并证实所有探测器在暗计数率为100次/秒时的系统DE高于67%。