Abstract

Iterative-series solutions have been recently developed for the scattering of p-polarized waves by a grating and for three-dimensional surfaces. However, their numerical behavior has not been investigated. We study the scattering by both dielectric and metallic sinusoidal gratings. We show that this kind of solution yields an accurate and efficient solution in the dielectric case. This solution may also be applied in conical-diffraction problems. Although some resonances have been successfully studied, the algorithm diverges for low values of the amplitude–period ratio in the case of metallic gratings.

© 1990 Optical Society of America

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