Self-Phasematched Nonlinear Optics in Integrated Semiconductor Microcavities

TL;DR

This paper introduces a new method for self-phasematched nonlinear optics in integrated semiconductor microcavities, combining theoretical modeling and experimental validation to optimize frequency conversion efficiency.

Contribution

It presents a novel theoretical model and experimental demonstration of self-phasematched second harmonic generation in integrated semiconductor microcavities.

Findings

Efficiency peaks near cavity resonance due to intra-cavity power enhancement.

Dispersion-induced wavelength detuning affects mode overlap and conversion efficiency.

Theoretical predictions align well with experimental results.

Abstract

A novel concept of self-phasematched optical frequency conversion in dispersive dielectric microcavities is studied theoretically and experimentally. We develop a time-dependent model, incorporating the dispersion into the structure of the spatial cavity modes and translating the phasematching requirement into the optimization of a nonlinear cavity mode overlap. We design and fabricate integrated double-resonance semiconductor microcavities for self-phasematched second harmonic generation. The measured efficiency exhibits a significant maximum near the cavity resonance due to the intra-cavity enhancement of the input power and the dispersion-induced wavelength detuning effect on the mode overlap, in good agreement with our theoretical predictions.