A light-emitting device and optical communication system based on the light-emitting device is disclosed. The light-emitting device is formed in a float-zone substrate. The light-emitting device includes on the substrate lower surface a reflective layer and on the upper surface spaced apart doped regions....http://www.google.com/patents/US20030205710?utm_source=gb-gplus-sharePatent US20030205710 - Silicon and silicon/germanium light-emitting device, methods and systems
