Extension of a Memory-Efficient Formulation for the Unconditionally Stable WLP-FDTD Method

In this letter, a memory efficient modification to the unconditionally stable finite-difference time-domain (FDTD) method combined with weighted Laguerre polynomials (WLP) is proposed. The divergence theorem is applied to the lossy media and perfectly matched layer (PML). This leads to a more memory-efficient matrix equation, and the computation time is reduced. A numerical example considering a two dimensional (2-D) TE case is presented to demonstrate the efficiency of the proposed algorithm.