Figure 6

The absorption \(\operatorname{Re} (\varepsilon _{T})\) of the output probe field as a function of the normalized detuning \(\Omega /\omega _{1}\) for different values of the mechanical driving fields. Figure 6(b) and 6(c) are the enlarged images of Fig. 6(a) around \(\Omega /\omega _{1}=1.6\) and \(\Omega /\omega _{1}=2.0\), respectively. The other parameters are the same as those in Fig. 5 except \(\omega _{2}=2\pi \times 0.8\times 10^{5}\text{ Hz}\) and \(\Delta =2\omega _{m}=\omega _{1}+\omega _{2}\). The dashed and dash-dotted curves correspond to \(r_{1}=r_{2}=10^{-5}\)