Cavity polariton optomechanics: Polariton path to fully resonant   dispersive coupling in optomechanical resonators
  Resonant photoelastic coupling in semiconductor nanostructures opens new perspectives for strongly enhanced light-sound interaction in optomechanical resonators. One potential problem, however, is the reduction of the cavity Q-factor induced by dissipation when the resonance is approached. We show in this letter that cavity-polariton mediation in the light-matter process overcomes this limitation allowing for a strongly enhanced photon-phonon coupling without significant lifetime reduction in the strongly-coupled regime. Huge optomechanical coupling factors in the PetaHz/nm range are envisaged, three orders of magnitude larger than the backaction produced by the mechanical displacement of the cavity mirrors. 
G. Rozas, A. E. Bruchhausen, A. Fainstein, B. Jusserand, A. Lema\^itre
cond-mat.mes-hall physics.optics