给出解三维时谐电磁散射问题的一种优化完美匹配层(PML)方法.该方法基于频域复坐标拉伸,通过在吸收函数中引入一个小参数ε0,使得散射问题优化 PML 方法的计算不依赖PML的厚度.并证明了只要参数ε0充分小,优化的 PML 解指数收敛于原三维时谐电磁散射问题的解.%The author gave an optimal perfectly matched layer (PML)method for solving the 3D time harmonic electromagnetic scattering problems.The method was based on the complex coordinate stretching in the frequency domain.The calculation of the optimal PML problem for the scattering problem was not dependent on the thickness of the PML layer by introducing a small parameterε0in the absorbing function.The author proved that the numerical solution converged exponentially to the original 3D time harmonic electromagnetic scattering problems if the parameterε0was sufficiently small.
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