Photorefraction-induced Bragg scattering in cryogenic lithium niobate ring resonators
Abstract
We report intracavity Bragg scattering induced by the photorefractive (PR) effect in high- Q lithium niobate ring resonators at cryogenic temperatures. We show that when a cavity mode is strongly excited, the PR effect imprints a long-lived periodic space-charge field. This residual field in turn creates a refractive index modulation pattern that dramatically enhances the back scattering of an incoming probe light, and results in selective and reconfigurable mode splittings. This PR-induced Bragg scattering effect, despite being undesired for many applications, could be utilized to enable optically programmable photonic components.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 15, 2021
- Source ID
- 10.1364/ol.414702
Entities
People
- Ayed Al Sayem
- Chang-Ling Zou
- Hong X Tang
- Linran Fan
- Risheng Cheng
- Yuntao Xu
Organizations
- Army Research Office
- David and Lucile Packard Foundation
- National Science Foundation
- United States Department of Energy