Polariton resonances for ultra-strong coupling cavity optomechanics in GaAs/AlAs multiple quantum wells

摘要

Polariton-mediated light-sound interaction is investigated through resonantBrillouin experiments in GaAs/AlAs multiple-quantum wells. Photoelasticcoupling enhancement at exciton-polariton resonance reaches 105 at 30 K ascompared to a typical bulk solid room temperature transparency value. Whenapplied to GaAs based cavity optomechanical nanodevices, this result opens thepath to huge displacement sensitivities and to novel ultrastrong-couplingcavity phenomena with optomechanical couplings g0 in the range of 100 THz.