Title :
Effective medium approach of left-handed material using a dispersive FDTD method
Author :
Lee, Jung-Yub ; Lee, Jeong-Hae ; Kim, Hyeong-Seok ; Kang, No-Weon ; Jung, Hyun-Kyo
Author_Institution :
Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., South Korea
fDate :
5/1/2005 12:00:00 AM
Abstract :
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.
Keywords :
electromagnetic wave propagation; finite difference time-domain analysis; metamaterials; permeability; permittivity; piecewise linear techniques; LHM propagation characteristic; Lorentz material model; anisotropic perfectly matched layer; boundary condition; dispersive FDTD method; dispersive medium property; finite difference time domain method; left-handed material; narrow pass band; negative permeability; negative permittivity; piecewise linear recursive convolution; split ring resonator; stop band; Anisotropic magnetoresistance; Convolution; Dispersion; Finite difference methods; Frequency; Metamaterials; Permeability; Permittivity; Piecewise linear techniques; Time domain analysis; Anisotropic perfectly matched layer (APML); dispersive medium; double negative (DNG); finite difference time domain (FDTD); left-handed material (LHM); metamaterial; piecewise linear recursive convolution (PLRC); split ring resonator (SRR);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2005.844566
