Fig. 1. 双矩形腔边耦合等离子体波导系统结构示意图Schematic of two stub cavities side-coupled to a plasmonic waveguide system

Fig. 2. PIT效应的实现原理示意图Schematic diagram of realizing principle of the PIT effect

Fig. 3. 满足等离子体波导色散方程的有效折射率曲线和相移曲线，等离子体波导宽度w=50 nmThe effective refractive index and phase shifts which satisfy the dispersion equation in the plasmonic waveguide with plasma waveguide width of w=50 nm

Fig. 4. 耦合系数和耦合Q值随双腔间距的变化The coupling coefficient and the coupling quality factor versus the coupling distance L

Fig. 5. PIT simulation analysis

Fig. 6. Magneticfield distributions of |H_z|² at the resonance wavelength

Fig. 7. Relationship between phase shifts of the PIT transmission spectrum and phase shifts of the waveguide signal light