RYTOV APPROXIMATION - APPLICATION TO SCATTERING BY 2-DIMENSIONAL WEAKLY NONLINEAR DIELECTRICS

The Rytov approximation is applied to devise an iterative numerical ap proach to the computation of electromagnetic scattering by two-dimensi onal weakly nonlinear configurations. The scatterers are assumed to be isotropic, inhomogeneous, lossless, and of arbitrary bounded shapes. The nonlinearity is assumed to be of the Kerr type, and the illuminati on is given by a monochromatic plane wave. The effects of the applicat ion of the Rytov approximation to various configurations and the conve rgence of the approach are demonstrated by several examples. Compariso ns with the iterative Born approach are also made. (C) 1996 Optical So ciety of America