Effective medium approach of left-handed material using a dispersive FDTD method

Left-handed material (LHM) exhibiting negative permittivity and negative permeability in certain band has dispersive medium property varying with frequency. The effective permittivity and permeability function of this material have a similar form of Lorentz material model. Piecewise linear recursive convolution (PLRC) technique for finite difference time domain (FDTD) method is applied to simulate the propagation characteristic of LHM effectively. Modified anisotropic perfectly matched layer (APML) is proposed for absorbing boundary condition of LHM. The simulation results show narrow pass band in the stop band where LHMs have double negative properties.