Antireflection quarter-wave-thick, high-spatial-frequency, surface-relief gratings at oblique incidence.
Zero-reflectance conditions for quarter-wave-thick, high-spatial-frequency, rectangular-groove dielectric gratings are analyzed further at oblique incidence by a combination of the effective medium theory and the anisotropic thin-film theory. Numerical examples are given for gratings on glass and silicon substrates with refractive indices of 1.5 and 3.5, respectively.
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Cojocaru