Silicon-Germanium Heterojunction Photodetectors for On-Chip Optoelectronics and Communications

Optical photodetectors are at the forefront of integrated photonics research as fundamental building blocks for optoelectronic systems and communication links. However, chip-integrated photodetectors with improved performances constitute on-going challenges for such applications. We present recent progress in high-speed silicon-germanium photodetectors fabricated on silicon-foundry-compatible platforms.