The Effect of Metal Reflector on Responsivity of Nb 5 N6 THz Detector

We investigated the effect of metal reflector on responsivity of Nb 5 N 6 detector in the frequency range from 0.6 THz to 0.7 THz. The designed results showed that the response spectrum of the detector was in consistent with the signal intensity on the substrate surface whether it contained a metal reflector or not. Compared to the detector on the Si substrate with the resonant frequency at 0.648 THz, the resonant frequency of the detector on the Si substrate with a metal reflector shifted to 0.683 THz, meanwhile, appearing multiple peaks in the response spectrum. It distinctly reveals the effect of metal reflector on responsivity of Nb 5 N 6 THz detector.