High efficiency, large-active-area superconducting nanowire single-photon detectors

Gu Min^a), Zhang La-Bao^a), Kang Lin^a)†, Zhao Qing-Yuan^a), Jia Tao^a), Wan Chao^a), Xu Rui-Ying^a), Yang Xiao-Zhong^a), Wu Pei-Heng^a), Zhang Yong^b), Xia Jin-Song^b)

(a) Simulation (blue line) and measurement (red line) results of SSPD device with 100-nm width and 100-nm spacing for wavelengths ranging from 1050 nm to 1650 nm. (b) Simulated spacing dependence of the optical absorptance in the 6-nm thick NbN nanowire.