回音壁共振器与三能级原子耦合系统的非互易透射

Nonreciprocal transmission in system of the whispering-gallery-mode resonator coupled to a three-level atom

基于回音壁共振器与三能级原子的耦合系统,实现了一种可控的非互易透射.研究表明:光力耦合能够诱导光子的非互易透射;通过改变光模与机械模的有效光力耦合强度G_(2)、光模与三能级原子的耦合强度g及Rabi频率Ω_(R),可以实现对非互易透射带的位置与数量的控制;调整耦合强度g和Rabi频率Ω_(R)可以显著地改变隔离比In的大小.研究结果可为回音壁共振器在非互易光学器件上的应用提供理论借鉴.

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 G_(2) 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 frequencyΩ_(R),the position and number of nonreciprocal transmission bands can both be controlled.The coupling strength g and Rabi frequencyΩ_(R) 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.