Polariton-mediated light-sound interaction is investigated through resonant Brillouin experiments in GaAs/AlAs multiple-quantum wells. Photoelastic coupling enhancement at exciton-polariton resonance reaches 105 at 30 K as compared to a typical bulk solid room temperature transparency value. When applied to GaAs based cavity optomechanical nanodevices, this result opens the path to huge displacement sensitivities and to novel ultrastrong-coupling cavity phenomena with optomechanical couplings g0 in the range of 100 THz.
@article{arxiv.1509.05152,
title = {Polariton resonances for ultra-strong coupling cavity optomechanics in GaAs/AlAs multiple quantum wells},
author = {B. Jusserand and A. Poddubny and A. Poshakinskiy and A. Fainstein and A. Lemaitre},
journal= {arXiv preprint arXiv:1509.05152},
year = {2016}
}