Massachusetts Institute of Technology

Douglas D Cannon

Lionel Cooper Kimerling

Kazumi Wada

Jifeng Liu

Yasuhiko Ishikawa

Kevin Kidoo Lee

An optical modulator includes at least one waveguide medium that receives light. An absorption medium absorbs the light under predefined conditions and outputs optically modulated light. The absorption medium is comprised of a Ge-based structure. The Ge-based structure uses the Franz-Keldysh effect to create said optically modulated light.

Light modulation using the Franz-Keldysh effect

A photodetector device includes a plurality of Ge epilayers that are grown on a substrate and annealed in a defined temperature range. The Ge epilayers form a tensile strained Ge layer that allows the photodetector device to operate efficiently in the C-band and L-band.

Method of forming GE photodetectors

Ge photodetectors

Growing community of inventors

Somerville, MA, United States of America

Douglas D Cannon