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Simulation of Electromagnetic Waves in Plasma by Subdomain-Level Nonconformal DGTD Method

The subdomain-level discontinuous Galerkin time-domain (SL-DGTD) method in a 3-D case is proposed in this article to simulate electromagnetic waves in plasma. An auxiliary differential equation (ADE) technique is employed to manipulate the dispersive characteristic of plasma. A hybrid nonconformal domain decomposition method is used to improve computational efficiency and modeling accuracy. The fourth-order explicit Runge–Kutta integration scheme is implemented to update the fields in each time step. Finally, the proposed algorithm is validated by studying the cutoff frequency of plasma, the transmission coefficients of a plasma slab, and the scattering characteristics of a plasma-coated sphere.