Wavelength dependence of intrinsic detection efficiency of NbN superconducting nanowire single-photon detector

Wang Yong^{1, 2, 3}, Li Hao^{1, 3, †}, You Li-Xing^{1, 3, ‡}, Lv Chao-Lin^{1, 2, 3}, Wang He-Qing^{1, 2, 3}, Zhang Xing-Yu^{1, 2, 3}, Zhang Wei-Jun^{1, 3}, Zhou Hui^{1, 3}, Zhang Lu^{1, 2, 3}, Yang Xiao-Yan^{1, 3}, Wang Zhen^{1, 3}

Intrinsic detection efficiency as a function of bias current for wavelengths ranging from 510 nm to 1700 nm for an SNSPD linewidth of 60 nm.