Title :
Implementation of Gaussian beam sources in FDTD for scattering problems
Author :
Ma, Lai-Ching ; Mittra, Raj
Author_Institution :
Pennsylvania State Univ., Pennsylvania
Abstract :
In this paper, we present an implementation of a Gaussian beam source in the FDTD by using a modified version of the total-field/scattered-field (TF/SF) formulation. Such a source finds many practical applications in the context of the FDTD simulation, such as scattering by rough surfaces and photonic crystals. Numerical examples are presented to illustrate the scattering of a Gaussian beam from a homogenous dielectric slab, as well as from a metamaterial slab containing split-ring and dipole type of inclusions, embedded in a background medium.
Keywords :
electromagnetic wave scattering; finite difference time-domain analysis; FDTD; Gaussian beam sources; homogenous dielectric slab; metamaterial slab; photonic crystals; scattering by rough surfaces; scattering problem; total-field/scattered-field formulation; Context modeling; Dielectrics; Electromagnetic scattering; Finite difference methods; Particle scattering; Photonic crystals; Rough surfaces; Slabs; Surface roughness; Time domain analysis;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2007 IEEE
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4244-0877-1
Electronic_ISBN :
978-1-4244-0878-8
DOI :
10.1109/APS.2007.4395832
