Perfect Optical Nonreciprocity with Mechanical Driving in a Three-Mode Optomechanical System *

Li-Hua Zhao,Xian-Li Li,He-Lin Lu,Xue-Dong Tian

Fig. 3 (Color online) Transmission amplitudes $T_{LR}$ (red line) and $T_{RL}$ (black line) are plotted vs.\ normalized detuning $x/\kappa$ for different mechanical decay rate. (a) $\gamma/\kappa=2$, (b) $\gamma/\kappa=1.5$, (c) $\gamma/\kappa=1.2$, and (d) $\gamma/\kappa=1.05$. The coupling strengths $G_{1}=G_{-}$ and $G_{2}={\kappa}/{2}$ according to Eq. (13).