Strained-layer Ga1−xInxAs/InP avalanche photodetectors

Abstract
We have investigated the electrical and optical properties of avalanche photodiodes with the absorption region formed by Ga1−x InxAs/InP strained‐layer superlattices. High quality structures with the In concentration x as high as 1 have been grown by gas source molecular beam epitaxy. We have extended the photodiode response to approximately 2 μm and obtained avalanche gain of 16. The spectral range accessible with these strained‐layer devices is carefully modeled.