Unconditionally stable higher order perfectly matched layer applied to terminate anisotropic magnetized plasma

Abstract

An effective and efficient absorbing boundary condition applied to terminate anisotropic magnetized plasma is proposed in this article. As its mathematical derivations are based on the high order perfectly matched layer (HO-PML) and Crank-Nicolson finite-difference time-domain method, it has the advantages of reducing late-time reflections, attenuating evanescent waves, absorbing low-frequency propagation waves and overcoming the Courant-Friedrichs-Levy condition. To validate the efficiency and effectiveness of the proposed HO-PML, a ridge waveguide model composed of vacuum and the anisotropic magnetized plasma, a dielectric waveguide model composed of the dielectric and the anisotropic magnetized plasma are employed. The numerical results show that the proposal can not only maintain the stability of the algorithm with the increment of the time step but also further enhance the absorbing performance.