Photodetection at 3.8 µm Using Intrinsic Monolithic Integrated Germanium Photodiodes

Abstract

Ge-on-SOI waveguide integrated photodiodes are demonstrated with a high responsivity of 0.1 A/W at a wavelength of 3.8 µm at room temperature. This is the first example of photodetection at 3.8 µm on an intrinsic germanium integrated detector.