Angular range for reflection of p-polarized light at the surface of an absorbing medium with reflectance below that at normal incidence

摘要

The range of incidence angle, 0<φ<φ_(e), over which p-polarized light is reflected at interfaces between transparent and absorbing media with reflectance below that at normal incidence is determined. Contours of constant φ_(e) in the complex plane of the relative dielectric constant ε are presented. A method for determining the real and imaginary parts of the complex refractive index,ε~(1/2)=n+jk, which is based on measuring φ_(e) and the pseudo-Brewster angle φ_(pB), is viable in the domain of fractional optical constants, n, k<1.