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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 66, Iss. 7 — Jul. 1, 1976
  • pp: 682–694

Light scattering from surfaces with a single dielectric overlayer

J. M. Elson  »View Author Affiliations

JOSA, Vol. 66, Issue 7, pp. 682-694 (1976)

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First-order perturbation theory and a nonorthogonal coordinate transformation are used to calculate light scattering from rough metallic surfaces having a dielectric overlayer. The theory considers arbitrary polarization, incident intensity profile, and angle of incidence, and it is valid for complex values of the dielectric constants of the metal ε and dielectric overlayer ε0. The frequency range of interest is such that Re(ε) < 0. The results are applied to cases of periodic and random roughness where the dielectric overlayer replicates the substrate profile. Comparison to experiment is made in the case of periodic roughness, and numerical results are given in both cases.

© 1976 Optical Society of America

J. M. Elson, "Light scattering from surfaces with a single dielectric overlayer," J. Opt. Soc. Am. 66, 682-694 (1976)

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  1. In the case of periodic roughness the rectangular profile is considered. Even though the slope of a rectangular profile is infinite at the steps the large majority of the surface has zero slope. In fact, it may be shown that the average slope of the surface is zero.
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