High‐speed integrated heterojunction field‐effect transistor photodetector: A gated photodetector

A new concept for a high‐speed photodetector is described which promises very low noise with avalanche gain. The detector is constructed as an integrated circuit element in the heterojunction field‐effect transistor technology and utilizes a unique n‐n heterojunction interface formed by either metalorganic chemical vapor deposition or molecular beam epitaxy growth techniques. The degree of avalanching is controlled via an electrical third terminal.