title: High efficiency germanium-assisted grating coupler.
abstract: We propose a fiber to submicron silicon waveguide vertical coupler utilizing germanium-on-silicon gratings. The germanium is epitaxially grown on silicon in the same step for building photodetectors. Coupling efficiency based on FDTD simulation is 76% at 1.55 µm and the optical 1dB bandwidth is 40 nm.
authors.forename: Shuyu
authors.initials: S
authors.lastname: Yang
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
authors.forename: Tom
authors.initials: T
authors.lastname: Baehr-Jones
authors.forename: Michael
authors.initials: M
authors.lastname: Hochberg
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D005857:Germanium; D008027:Light; D055095:Optics and Photonics / Q000295:instrumentation*; D012542:Scattering, Radiation; D012825:Silicon
chemical_list: D005857:Germanium; D012825:Silicon