Cavity optomechanics with surface acoustic waves

TL;DR

This paper presents a novel electro-optomechanical system utilizing surface acoustic waves in piezoelectric materials, highlighting polarization-dependent interactions and focusing circuits to enhance photon-phonon coupling.

Contribution

It introduces a surface acoustic wave-based system with polarization-sensitive optoelastic effects and 2D focusing circuits for improved coupling, advancing optomechanical integration.

Findings

Estimated optomechanical coupling rate g_0

Demonstrated polarization dependence of photon-SAW interaction

Proposed 2D SAW focusing circuits for coupling enhancement

Abstract

We report a development of an electro-optomechanical system based on a surface acoustic wave (SAW), where a piezoelectric material with a large optoelastic susceptibility is used for the coupling of both a radio wave and optical light to the SAW. In the optical domain, we exploit a tensorial nature of the optoelastic effect to show a polarization dependence of the photon-SAW interaction. We discuss the construction of two-dimensional SAW focusing circuits for the coupling enhancement and the optical cavity enhanced photon-phonon scattering. We estimate an optomechanical coupling rate $g_0$ of the system and discuss the future direction for the improvement of the coupling strength.