A general UPML FDTD absorbing boundary condition for dispersive media

摘要

The dispersion relation and the reflectionless condition are obtained by the Maxwell''s curl equations in a uniaxial anisotropic medium and the phase-matching. Using the Shift Operator Finite Difference Time Domain (SO-FDTD) method and the transform relationship of frequency domain to time domain(jω replaced by ∂/∂t), an FDTD absorbing boundary condition available for three kinds of general dispersive medium models, i.e. Debye model, Lorentz model and Drude model, is given. The computed results illustrate the generality and the high effectiveness of presented scheme.