Intersubband detector with avalanche multiplier region

摘要

A photodetector for use at wavelengths of 2 mum and longer has an intersubband absorption region to provide absorption at wavelengths beyond 2 mum, integrated with an avalanche multiplier region to provide low-noise gain. In one particular design, the intersubband absorption region is a quantum-confined absorption region (e.g., based on quantum wells and/or quantum dots).