PML-FDTD法在分析平面光波导结构中的应用

Analysis of Planar Optical Waveguide Structures with the PML-FDTD Method

将理想匹配层(PML)吸收边界条件用于平面光波导结构的时域有限差分(FDTD)法分析中,给出了平面光波导结构的PML吸收边界条件,并对平行介质带定向耦合器进行数值模拟和验证,所得结果与理论值非常一致,证明了PML吸收边界条件应用于平面光波导结构分析的有效性。本文方法可用于分析任意复杂结构的平面光波导。

The perfectly matched layer (PML) absorbing boundary condition was used in the finite difference time domain (FDTD) method to analyse planar optical waveguide structures. The PML absorbing boundary condition for planar optical waveguide structures was derived and the numerical experiments for the parallel-slab directional coupler were implemented and presented. It is shown that the result is in good agreement with the theoretical solutions. Furthermore, it was proved that this method is valid for planar optical waveguide structure. This method can also be used as a powerful CAD tool in the analysis of arbitrary optical waveguide structures.