14 July 1988 Angle-Resolved Scattering From Rough Surfaces With An Inhomogeneous Dielectric Permittivity
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Abstract
First-order vector perturbation theory is applied to calculate angle-resolved scattering (ARS) from a semi-infinite medium with interface roughness and an inhomogeneous dielectric permittivity. Two distinct physical situations are considered: ARS of a (1) beam incident on the surface and (2) surface plasmon propagating along the surface. The dielectric perturbation is assumed to fluctuate randomly in the plane parallel to the surface and decay exponentially with depth into the surface. Both the roughness and dielectric permittivity perturbations, which are treated as random variables, can independently cause scattering, and generally there i s interference between the two scattered fields. The scattered fields usually depend on the autocovariance functions of the surface roughnes s and dielectric fluctuations as well as the cross-correlation properties between them. For this reason, the polarization ratio of the p- and s-scattered fields depends on the autocovariance and cross-correlation statistical properties. This result is unlike the calculation of scattered fields caused by roughness or dielectric perturbations alone, since in this case the polarization ratios of the scattered fields do not depend on the statistical properties of the perturbation.
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J.Merle Elson, J.Merle Elson, } "Angle-Resolved Scattering From Rough Surfaces With An Inhomogeneous Dielectric Permittivity", Proc. SPIE 0927, Wave Propagation and Scattering in Varied Media, (14 July 1988); doi: 10.1117/12.945829; https://doi.org/10.1117/12.945829
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