黑磷/介质多层结构包覆的可调谐波导

Tunable Plasma Waveguides Cladded by Black Phosphorus/Dielectric Multilayer Structures

从理论上提出了一种由黑磷/介质多层结构包覆的等离子体波导。利用MATLAB数值求解该波导的色散方程,进而仿真出波导的有效折射率、传播长度、趋肤深度及品质因数等性能参数曲线。由仿真曲线可知,波导的性能与黑磷/介质多层结构中的电子掺杂率正相关,与单元层中介质层厚度负相关。与同类型金属/介质多层结构波导的性能比较后可知,黑磷/介质多层结构波导在中红外及远红外波段具更大的传播长度、更小的趋肤深度及更大的品质因数。该波导可调谐且性能优良。

In this study,a plasma waveguide cladded by black phosphorus/dielectric multilayer structures was theoretically proposed.By numerically solving the dispersion equation with MATLAB,the performance curves of the effective refractive index,propagation length,penetration depth,and figures of merit of the waveguide could be simulated.According to the simulation curves,the performances of the waveguide positively and negatively correlated with the electron doping rate of the black phosphorus/dielectric multilayer structure and the dielectric thickness in the element layer.Compared with the same type of metal/medium multilayer structures waveguide,the black phosphorus/dielectric multilayer structures waveguide has a larger propagation length,a smaller propagation depth and a larger figures of merit in the mid-infrared and far-infrared bands.The waveguide is tunable and has excellent performance.