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.
© 1996 Optical Society of America
Original Manuscript: June 22, 1995
Revised Manuscript: April 3, 1996
Published: November 1, 1996
E. Cojocaru, "Antireflection quarter-wave-thick, high-spatial-frequency, surface-relief gratings at oblique incidence," Appl. Opt. 35, 6231-6235 (1996)