Abstract

One- and two-dimensional high-spatial-frequency dielectric surface-relief gratings on a Au substrate are used to design a high-reflectance quarter-wave retarder at 70° angle of incidence and 10.6-μm light wavelength. The equivalent homogeneous anisotropic layer model is used. It is shown that equal and high reflectances (>98.5%) for the p and the s polarizations and quarter-wave retardation can be achieved with two-dimensional ZnS surface-relief gratings. Sensitivities to changes of incidence angle, light wavelength, grating filling factor, and grating layer thickness are considered.

© 1996 Optical Society of America

Antireflection quarter-wave-thick, high-spatial-frequency, surface-relief gratings at oblique incidence

E. Cojocaru
Appl. Opt. 35(31) 6231-6235 (1996)

Constraint on the optical constants of a film–substrate system for operation as an external-reflection retarder at a given angle of incidence

R. M. A. Azzam and Bruce E. Perilloux
Appl. Opt. 24(8) 1171-1179 (1985)

Zero-reflectivity high spatial-frequency rectangular-groove dielectric surface-relief gratings

Thomas K. Gaylord, W. E. Baird, and M. G. Moharam
Appl. Opt. 25(24) 4562-4567 (1986)

Antireflection surface structure: dielectric layer(s) over a high spatial-frequency surface-relief grating on a lossy substrate

Elias N. Glytsis and Thomas K. Gaylord
Appl. Opt. 27(20) 4288-4304 (1988)

Zero-reflectivity homogeneous layers and high spatial-frequency surface-relief gratings on lossy materials

Thomas K. Gaylord, E. N. Glytsis, and M. G. Moharam
Appl. Opt. 26(15) 3123-3135 (1987)