Strong single-photon optomechanical coupling in a hybrid quantum system

Engineering strong single-photon optomechanical couplings is crucial for systems. Here, we propose a hybrid quantum system consisting of nanobeam (phonons) coupled to spin ensemble and cavity (photons) overcome it. Utilizing the critical property lower-branch polariton (LBP) formed by ensemble-phonon interaction, LBP-cavity coupling can be greatly enhanced three orders magnitude original one, while upper-branch (UBP)-cavity fully suppressed. Our proposal breaks through condition strength less than value in previous schemes using two harmonic oscillators. Also, Kerr effect induced our proposal. This shows proposed approach used study nonlinear nonclassical effects weakly