Integrated high quality factor lithium niobate microdisk resonators

TL;DR

This paper presents the development of high-quality lithium niobate microdisk resonators with exceptional optical quality factors, scalable fabrication, and demonstrated on-chip second harmonic generation across visible and near-infrared wavelengths.

Contribution

The work introduces scalable fabrication of high-Q lithium niobate microdisk resonators capable of efficient nonlinear optical processes.

Findings

Optical quality factor ~ 100,000 achieved

Operates over visible and near-infrared wavelengths

Demonstrates on-chip second harmonic generation with 0.109 W-1 efficiency

Abstract

Lithium Niobate (LN) is an important nonlinear optical material. Here we demonstrate LN microdisk resonators that feature optical quality factor ~ 100,000, realized using robust and scalable fabrication techniques, that operate over a wide wavelength range spanning visible and near infrared. Using our resonators, and leveraging LN's large second order optical nonlinearity, we demonstrate on-chip second harmonic generation with a conversion efficiency of 0.109 W-1.