Extension of the C method to nonhomogeneous media: application to nonhomogeneous layers with parallel modulated faces and to inclined lamellar gratings

摘要

The differential formalism of Chandezon was extended to nonhomogeneous media, m contrast to the case of homogeneous media, we were led to a different eigenvalue problem for each polarization. As an illustration, we analyzed diffraction by a sinusoidal piecewise-homogeneous modulated layer and by an inclined lamellar grating. Results were validated by comparison with the rigorous coupled-wave analysis. # 1997 Optical Society of America [S0740-3232(97)00107-5]