Operation of a single quantum well heterojunction field-effect photodetector

Abstract
The single quantum well heterojunction field‐effect photodetector is demonstrated for the first time as a GHz bandwidth waveguide heterostructure, and as the optoelectronic counterpart to the single quantum well heterojunction field‐effect transistor. For a 1 μm gate‐length device a responsivity of 0.16 A/W, external quantum efficiency of 0.35, and test‐laser limited rise time of 100 ps are obtained.