Open AccessAn efficient iterative algorithm for computation of scattering from dielectric objects
Author(s) -
Shaolin Liao,
N. Gopalsami,
Aneesh Venugopal,
Alexander Heifetz,
A.C. Raptis
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.003304
Subject(s) - optics , dielectric , computation , scattering , iterative method , plane wave , antenna (radio) , convergence (economics) , plane (geometry) , physics , boundary value problem , electromagnetic radiation , algorithm , computer science , mathematics , telecommunications , geometry , optoelectronics , quantum mechanics , economics , economic growth
We have developed an efficient iterative algorithm for electromagnetic scattering of arbitrary but relatively smooth dielectric objects. The algorithm iteratively adapts the equivalent surface currents until the electromagnetic fields inside and outside the dielectric objects match the boundary conditions. Theoretical convergence is analyzed for two examples that solve scattering of plane waves incident upon air/dielectric slabs of semi-infinite and finite thicknesses. We applied the iterative algorithm for simulation of sinusoidally-perturbed dielectric slab on one side and the method converged for such unsmooth surfaces. We next simulated the shift in radiation pattern of a 6-inch dielectric lens for different offsets of the feed antenna on the focal plane. The result is compared to that of the Geometrical Optics (GO).