Patent ID: 9142698
Filing Date: 2015-09-22
Classification: G02B,G02F,H01L,Y02P

Abstract:
1. An optical device, comprising: an optical waveguide, having a top surface, configured to convey an optical signal having a wavelength along a propagation direction; and an electro-absorption modulator disposed on the top surface, wherein the electro-absorption modulator includes: an n-type doped silicon sidewall; a p-type doped silicon sidewall; germanium disposed between the n-type doped silicon sidewall and the p-type doped silicon sidewall; and electrical contacts electrically coupled to the n-type doped silicon sidewall and the p-type doped silicon sidewall, wherein the electrical contacts are configured to apply a voltage between the n-type doped silicon sidewall and the p-type doped silicon sidewall to generate an electric field along a lateral direction in the germanium, and wherein the lateral direction is parallel to a plane of the optical waveguide and is perpendicular to the propagation direction.