title: Angle of incidence of minimum reflectance of a dielectric-conductor interface for incident unpolarized or circularly polarized light.
abstract: The angle of incidence ϕ=ϕu minof minimum reflectance for incident unpolarized or circularly polarized light at a dielectric-conductor interface is determined for any complex relative refractive index N=(n,k), and contours of constant ϕu minin the nk plane are presented. The minimum reflectance Ru minat ϕu minis also plotted as a function of the polar angle 0≤θ=arg(N)≤90° along each constant ϕu mincontour. Also presented are families of Ru-versus-ϕ curves for values of complex N at θ=30°, ϕu min=45° to 85° in steps of 10°, and values of complex N at ϕu min=75°, θ=0° to 90° in steps of 10°. Finally, a nonpolarimetric method for the determination of n and k of optical materials, which is based on measurements of ϕu minand the normal-incidence reflectance R0, is proposed.
authors.forename: R M A
authors.initials: RM
authors.lastname: Azzam
authors.forename: A
authors.initials: A
authors.lastname: Alsamman