Nonreciprocal transmission in system of the whispering-gallery-mode resonator coupled to a three-level atom
A controllable nonreciprocal transmission is achieved based on the system of a whispering-gallery-mode resonator coupled to a three-level atom.The nonreciprocal transmission of photon is induced by the optomechanical coupling.By changing the effective optomechanical coupling strength G2 between the optical mode and the mechanical mode,the coupling strength g between the optical modes and the three-level atom as well as the Rabi frequency ΩR,the position and number of nonreciprocal transmission bands can both be controlled.The coupling strength g and Rabi frequency QR can both significantly change the isolation ratio(In).These research results can provide the theoretical reference for the study of nonreciprocal optical devices related to whispering-gallery-mode resonators.
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