The efficiency ηLC of linear-to-circular polarization conversion when light is reflected at a dielectric–conductor interface is determined as a function of the principal angle ϕ¯ and principal azimuth ψ¯ . Constant- ηLC contours are presented in the ϕ¯ ,ψ¯ plane for values of ηLC from 0.5 to 1.0 in steps of 0.05, and the corresponding contours in the complex plane of the relative dielectric function ϵ are also determined. As specific examples, efficiencies ⩾88% are obtained for light reflection by a Ag mirror in the visible and near-IR (400–1200nm) spectral range, and ≥40% for the reflection of extreme ultraviolet (EUV) and soft x-ray radiation by a SiC mirror in the 60–120nm wavelength range.
Journal of the Optical Society of America A
R. M. A. Azzam and A. Alsamman, "Efficiency of linear-to-circular polarization conversion for light reflection at the principal angle by a dielectric-conductor interface," J. Opt. Soc. Am. A 25, 834-837 (2008)