Title :
Electromagnetic scattering characteristics of DNM rough surface in the terahertz regime by the FDTD algorithm
Author :
Ke Li ; Li-Xin Guo ; Juan Li
Author_Institution :
Xidian Univ., Xi´an, China
Abstract :
Wide band electromagnetic (EM) scattering characteristics of randomly rough surface in the terahertz (THz)frequency range are investigated through the use of finite difference time domain(FDTD) algorithm. Then the scattering characteristics of double negative materials(DNM) randomly rough surface are investigated further. It´s worth nothing that in order to avoid introducing numerical divergence, setting the negative permittivity and negative permeability of the negative material region indirectly is necessary. By using the constitutive relation and the transform relation of time domain and frequency domain, the two dimensional (2-D) differential equations in FDTD are obtained.
Keywords :
differential equations; electromagnetic wave scattering; finite difference time-domain analysis; magnetic permeability; permittivity; terahertz waves; 2-D differential equations; DNM rough surface; FDTD algorithm; double negative materials; finite difference time domain; frequency domain; negative permeability; negative permittivity; numerical divergence; randomly rough surface; terahertz frequency; terahertz regime; time domain; two dimensional differential equations; wideband electromagnetic scattering characteristics; Electromagnetic scattering; Finite difference methods; Permittivity; Rough surfaces; Surface roughness; Time-domain analysis;
Conference_Titel :
Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International
Conference_Location :
Quebec City, QC
DOI :
10.1109/IGARSS.2014.6946419
