Photorefraction-induced Bragg scattering in cryogenic lithium niobate ring resonators

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 c...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2020-12
Main Authors: Xu, Yuntao, Ayed Al Sayem, Chang-Ling, Zou, Fan, Linran, Tang, Hong X
Format: Article
Language:English
Subjects:
Cavity resonators
Cryogenic temperature
Lithium niobates
Photorefraction
Photorefractivity
Refractivity
Scattering
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2331-8422