GT-PML: generalized theory of perfectly matched layers and its application to the reflectionless truncation of finite-difference time-domain grids

A new formulation is presented for the systematic development of perfectly matched layers (PML) from Maxwell´s equations in properly constructed anisotropic media. The proposed formulation has an important advantage over the original Berenger´s PML in that it can be implemented in the time domain without any splitting of the fields. Results from 3D simulations illustrate the effectiveness of the proposed method.