Photorefraction-induced Bragg scattering in cryogenic lithium niobate ring resonators
Optics
2020-12-22 v1
Abstract
We report intracavity Bragg scattering induced by photorefractive (PR) effect in high-Q lithium niobate (LN) 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.
Keywords
Cite
@article{arxiv.2012.10775,
title = {Photorefraction-induced Bragg scattering in cryogenic lithium niobate ring resonators},
author = {Yuntao Xu and Ayed Al Sayem and Chang-Ling Zou and Linran Fan and Hong X. Tang},
journal= {arXiv preprint arXiv:2012.10775},
year = {2020}
}