Remote weak-signal measurement via bound states in optomechanical systems

Xun Li,Biao Xiong,Shilei Chao,Chengsong Zhao,Hua-Tang Tan,Ling Zhou

Figure 3. The sensitivity of the sensor (without thermal noise) as affected by several parameters where: (a) Δs=2ωm (blue solid line), 2.4ωm (red dashed line), 8ωm (green dotted line), and (b) Δo=0.8ωm (blue solid line), 2 ωm  (red dashed line), and 6ωm (green dotted line), where Δs=2.4ωm in (b). When bound states occur and satisfy the frequency condition, in particular, ${\omega }_{{r}_{1}}\approx {\omega }_{{r}_{2}}\,\approx 0$ (the blue solid line in (b)), the sensitivity is optimized. Here, γm=10−5ωm, ωm/2π=0.5 GHz, m=1.4 × 10−18 kg and θ = π/2. Other unspecified parameters are the same as in figure 2.