Document Type
Article
Publication Date
2-15-1985
Abstract
The condition of zero reflection of p- and s-polarized light by a transparent bilayer on an absorbing substrate is derived in the form |gν(ø,Ni)| ≤ 1, where gν is a function of the angle of incidence ø, the refractive indices Ni(i = 0,1,2,3) of the system, and the polarization state ν (= p or s). As an application, the air-Si3N4-SiO2-Si system is considered at two laser wavelengths λ = 6328 and 3250 Å. The thicknesses of the two films of the bilayer and the unextinguished reflectance are determined as functions of ø, and the results appear graphically and in tables. Extinction of the s polarization is accompanied by low overall residual reflectance (e.g., for incident unpolarized light, it is 1.6% for λ = 6328 Å at ø = 45°). On the other hand, suppression of the p polarization at a high incidence angle is accompanied by high s reflectance (e.g. = 96%for λ = 3250 Å at ø = 83°). This demonstrates that efficient bilayer reflection polarizers are possible.
Journal Name
Applied Optics
Recommended Citation
R. M. A. Azzam and Karim Javily, "Antireflecting and polarizing transparent bilayer coatings on absorbing substrates at oblique incidence," Appl. Opt. 24, 519-526 (1985)
Comments
This paper was published in Applied Optics and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-24-4-519. Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.