Scaled CFS-PML: it is more robust, more accurate, more efficient, and simple to implement. Why aren't you using it?

摘要

An efficient scaling strategy of the complex-frequency shifted (CFS) form of the perfectly matched layer (PML) media is presented for the termination of FDTD lattices. It is found that the proposed formulation accurately absorbs both evanescent and propagating waves, can be placed extremely close to edge discontinuities, and can lead to a significant reduction in PML layer thickness as compared to existing PML formulations. The formulation is also posed in a material independent form for the termination of domains composed of general homogeneous or inhomogeneous media.