GaAs-based, 1.55 µm high speed, high saturationpower, low-temperaturegrown GaAs pin photodetector

Abstract
A novel 1.55 µm high speed (> 20 GHz) and high saturation power (> 10 mW) pin photodetector grown on a GaAs substrate is reported. By utilising low-temperature grown GaAs, the photodetectors can detect 1.55 µm light with high bandwidth owing to the short carrier trapping time.