Enhanced photoresponsivity in graphene-silicon slow-light photonic crystal waveguides
Abstract
We demonstrate the enhanced fast photoresponsivity in graphene hybrid structures by combining the ultrafast dynamics of graphene with improved light-matter interactions in slow-light photonic crystal waveguides. With a 200 μm interaction length, a 0.8 mA/W photoresponsivity is achieved in a graphene-silicon Schottky-like photodetector, with an operating bandwidth in excess of 5 GHz and wavelength range at least from 1480 nm to 1580 nm. Fourfold enhancement of the photocurrent is observed in the slow light region, compared to the wavelength far from the photonic crystal bandedge, for a chip-scale broadband fast photodetector.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Mar 14, 2016
- Source ID
- 10.1063/1.4944414
Entities
People
- Chee Wei Wong
- Dim-lee Kwong
- Guoqiang Lo
- Guoying Feng
- Hao Zhou
- James F. Mcmillan
- Mingbin Yu
- Shouhuan Zhou
- Tingyi Gu
Organizations
- Columbia University
- Institute of Microelectronics
- National Science Foundation
- Office of Naval Research
- Sichuan University
- University of California