APPLICATION OF THE UMOM FOR THE COMPUTATION OF THE SCATTERING BY DIELECTRICS COATED WITH WEAKLY NONLINEAR LAYERS

Abstract

The paper describes an iterative approach to the computation of the electromagnetic scattering by isotropic, dielectric objects partially made of weakly nonlinear materials The approach is started by using a perturbative moment-method solution based on the Sherman-MorrisonWoodbury formula. The nonlinearity is assumed to be of the Kerr type, i e, the dielectric permittivity depends on the square amplitude of the electric field The bistatic scattering width and the field distribution are computed for some test cases, in particular, for infinite cylinders coated and filled with nonlinear materials The convergence of the medium is numerically evaluated and the results are compared with those obtained by the iterative distorted-wave Born approximation. [Vol. 10, No. 3 (1995), Special Issue on Advances in the Application of Method of Moments to Electromagnetic Radiation and Scattering Problems, pp 139-145]