Spectrum of Single‐Photon Scattering in a Strong‐Coupling Hybrid Optomechanical System

Abstract

AbstractThe single‐photon excitation and transmission spectra of strong‐coupling hybrid optomechanics are theoretically analyzed, where a two‐level system (TLS) is coupled to a mechanical resonator (MR), generating Jaynes–Cummings‐type polariton doublets. In this model, both the optomechanical coupling and the TLS‐MR coupling are strong. In this parameter region, polaron‐assisted excitation reemission processes can strongly affect the single‐photon excitation and output spectra of the cavity. It is found that the fine structure around each sideband can be used to characterize the TLS‐MR and the effective TLS‐photon couplings, even at the single‐quantum level. Thus, the spectrum structures may make it possible to sensitively probe the quantum nature of a macroscopic mechanical element. A possible approach for tomographic reconstruction of the state of a TLS, utilizing the single‐photon transmission spectra, is further provided.