Giant optomechanical coupling and dephasing protection with cavity exciton-polaritons

P. SESIN, A. S. KUZNETSOV, G. ROZAS, S. ANGUIANO, A. E. BRUCHHAUSEN, A. LEMAÎTRE, K. BIERMANN, P. V. SANTOS, A. FAINSTEIN

Physical Review Research

American Physical Society

Lugar: Ithaca; Año: 2023

2331-8422

Electronic resonances can significantly enhance the photon-phonon coupling, but are normally avoided in cavity optomechanics due to absorption losses and dephasing by inhomogeneous broadening. We experimentally demonstrate that exciton-polaritons in semiconductor microcavities enable single-particle resonant optomechanical couplings with GHz vibrations reaching record values in the 10s of MHz range. Moreover, this resonant enhancement is protected from inhomogeneous broadening by the Rabi gap. Single-polariton non-linearities and the optomechanical strong-coupling regime become accessible in this platform.