Efficient PML implementation based on the unconditionally stable CN-FDTD algorithm for anisotropic magnetized plasma

Based on the bilinear transform (BT) method and the Crank-Nicolson-approximate-decoupling (CNAD) algorithm, an efficient unconditionally stable implementation of the stretched coordinate perfectly matched layer (SC-PML) is proposed to truncate anisotropic magnetized plasma. The dispersive magnetized plasma can be calculated by the modified auxiliary differential equation (ADE) method. The proposed SC-PML formulations not only have the advantage of the conventional PML in terms of the absorbing performances but also take the advantage of unconditional stability of the original CN algorithm. In this paper, numerical examples are provided in the two-dimensional domain with anisotropic magnetized plasma to validate the effectiveness of the algorithm. The results show that the proposed SC-PML is an unconditionally stable scheme for the time step which surpasses the Courant–Friedrichs–Lewy (CFL) condition and it has considerable absorbing performance.