拓扑绝缘体椭球粒子的电磁散射

利用麦克斯韦方程组,用球矢量波函数展开了长椭球坐标系中的电磁场分量; 根据拓扑绝缘体的本构关系,修正了椭球内外的电磁场;利用拓扑绝缘体的边界条件, 推导了散射系数和散射电磁场.模拟结果表明:当时间反演对称打破时,拓扑磁电参数对散射截面有明显影响.

Electromagnetic wave scattering by a topological insulator prolate spheroid particle

Using Maxwell equations, we expand electromagnetic field components in spherical coordinate frame by using spherical vector wave function. According to the constitute relations of the topological insulator (TI), we modify transmittance fields and scattering fields. Using boundary conditions of topological insulator, we obtain the scattering electromagnetic fields. Numerical result show that when the time reversal symmetry is broken, the scattering cross sections are influenced by the topological magneto-electric polarizability.