中国物理B ›› 2014, Vol. 23 ›› Issue (6): 60308-060308.doi: 10.1088/1674-1056/23/6/060308
王玉珏, 丁天, 马海强, 焦荣珍
Wang Yu-Jue (王玉珏), Ding Tian (丁天), Ma Hai-Qiang (马海强), Jiao Rong-Zhen (焦荣珍)
摘要: The performance of superconducting nanowire single-photon detector (SNSPD) involving niobium nitride with the fan coupling antenna array is analyzed. The SNSPD has a high detection efficiency and counting rate. Hydrogen silsesquioxane and niobium nitride are filled in the gold grating deposited on the substrate in which the fan coupling antenna arrays are embedded. By changing the position of the fan coupling antenna array, the maximum area of optical intensity is obtained and the photon collection efficiency is increased by 26.5 times. The detection efficiency of SNSPD is improved without changing the detection speed. These parameters are important for designing a practical single-photon detector.
中图分类号: (Quantum cryptography and communication security)