摘要
利用超导铌及绝缘隧道阻挡层构成的器件可在２００～５００ｎｍ波长范围内以２．５ｋＨｚ的速率探测单个光子，其本征光谱分辨率为４５ｎｍ，量子效率可达５０％．
The superconducting tunnel junction fabricated from niobium and a highly transmissive insulating barrier can detect individual photons at rates up to 2.5kHz in the wavelength range 200～500nm, with an intrinsic spectral resolution of 45nm and a quantum efficiency estimated to be about 50 per cent.
