Coupled micro-resonators for second-order integrated nonlinear optics

TL;DR

This paper explores second-order nonlinear optical processes in coupled micro-resonators, demonstrating how coupling-induced frequency splitting enables phase matching for efficient second harmonic generation in integrated photonic devices.

Contribution

It introduces a novel approach using coupled micro-resonators to achieve phase matching and double resonance for second harmonic generation in integrated optics.

Findings

Coupling induces frequency splitting that facilitates phase matching.

Double resonance enhances second harmonic generation efficiency.

Theoretical analysis confirms the effectiveness of the coupled resonator system.

Abstract

We investigate second-order nonlinear processes in a system of two coupled identical optical micro-resonators. The double resonance and phase-matching conditions are simultaneously obtained thanks to the frequency splitting induced by the resonator coupling. The analysis made in the framework of the coupled mode theory is applied to the second harmonic generation process in two whispering gallery mode microdisks made in III-V materials.