An Effective SC-PML Implementation for Iterative WLP-FDTD Method With Reduced Splitting Error

In this letter, a stretched coordinate (SC) perfectly matched layer (PML) is presented for the iterative finite-difference time-domain (FDTD) method based on weighted Laguerre polynomials (WLPs). By applying the iterative scheme, the splitting error in WLP-FDTD is reduced. The SC-PML can be easily combined with a complex-frequency-shifted factor to improve the performance for low frequency and evanescent wave absorption. Numerical example demonstrates the accuracy and effectiveness of the proposed algorithm.