具有高系统探测效率的低填充因子超导单光子探测器。

Low-filling-factor superconducting single photon detector with high system detection efficiency.

作者信息

Yamashita Taro, Miki Shigehito, Terai Hirotaka, Wang Zhen

出版信息

Opt Express. 2013 Nov 4;21(22):27177-84. doi: 10.1364/OE.21.027177.

DOI:10.1364/OE.21.027177

Abstract

We designed, fabricated, and measured superconducting nanowire single-photon detectors (SSPDs) with low filling factor which achieve high system detection efficiency (SDE) and counting rate simultaneously. Numerical simulation reveals that high optical absorptance is possible in SSPDs even for low filing factor by tuning the device design. The SDEs of fabricated 18-50% filling factor SSPDs were measured systematically, and all SSPDs showed high SDEs of 61-80% and the lowest 18% filling factor SSPD achieved a high SDE of 69%.

摘要

我们设计、制造并测量了具有低填充因子的超导纳米线单光子探测器（SSPD），其能同时实现高系统探测效率（SDE）和计数率。数值模拟表明，通过调整器件设计，即使对于低填充因子的SSPD，也有可能实现高光学吸收率。系统测量了制造的填充因子为18%-50%的SSPD的SDE，所有SSPD均显示出61%-80%的高SDE，填充因子最低为18%的SSPD实现了69%的高SDE。