Multiply resonant high quality photonic crystal nanocavities

TL;DR

This paper introduces a novel photonic crystal nanocavity with multiple, tunable resonances, achieved through intersecting nanobeam cavities, promising for nonlinear optical applications.

Contribution

It presents a new design of multiply resonant nanocavities with nearly independent tunability and experimentally demonstrates high quality factors and large resonance separation.

Findings

Quality factors of 6,600 and 1,000 measured

Resonance separation up to 506 nm achieved

Potential for enhanced nonlinear optical processes

Abstract

We propose and experimentally demonstrate a photonic crystal nanocavity with multiple resonances that can be tuned nearly independently. The design is composed of two orthogonal intersecting nanobeam cavities. Experimentally, we measure cavity quality factors of 6,600 and 1000 for resonances separated by 382 nm; we measure a maximum separation between resonances of 506 nm. These structures are promising for enhancing efficiency in nonlinear optical processes such as sum/difference frequency and stimulated Raman scattering.