Author:
Du Jiawei,Huang Yongqing,Ren Ren,Duan Xiaofeng,Liu Kai,Yang Yisu,Ren Xiaomin
Abstract
A dual-absorption photodetector with a cylindrical hole in the top photodiode is proposed. Compared with the traditional mesa-structure dual-absorption photodetector, the novel photodetector can increase the 3dB bandwidth by 37.7% with responsivity of 0.642 A/W.