Model of acousto-optic diffraction of light in 2-D photonic crystals

TL;DR

This paper develops a computational model for acousto-optic diffraction in 2-D photonic crystals, enabling prediction of polarization-specific diffraction and simulation of interaction amplitudes under phase-matching conditions.

Contribution

It introduces a novel eigenvalue problem formulation for nonlinear acousto-optic interactions in photonic crystals, facilitating predictive simulations.

Findings

Predicts which acoustic polarizations cause TE or TM diffraction.

Provides a method to compute interaction amplitudes during Bragg diffraction.

Enables phase-matching condition analysis through simulations.

Abstract

The model of nonlinear interaction of proper waves of photonic crystal with plane acoustic wave was developed. The formulation of the model is reduced to the eigenvalue problem, which can be solved by computer simulations. By means of the formulae given in present paper one can predict which polarizations of acoustic wave can result in Bragg diffraction of optical waves of TE or TM polarizations. Computer simulation allows obtaining amplitudes of interaction waves in the case of Bragg diffraction when phase-matching conditions are fulfilled.