The range of incidence angle, 0 < φ < φ<sub>e</sub>, over which <i>p</i>-polarized light is reflected at interfaces between transparent and absorbing media with reflectance below that at normal incidence is determined. Contours of constant φ<sub>e</sub> 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<sup>1/2</sup> = n + jk, which is based on measuring φ<sub>e</sub> and the pseudo-Brewster angle φ<sub>pB</sub>, is viable in the domain of fractional optical constants, n, k < 1.
© 2002 Optical Society of America
(240.0240) Optics at surfaces : Optics at surfaces
(260.0260) Physical optics : Physical optics
(260.3910) Physical optics : Metal optics
(260.5430) Physical optics : Polarization
(290.3030) Scattering : Index measurements
R. M. A. Azzam and Ericson E. Ugbo, "Angular range for reflection of p-polarized light at the surface of an absorbing medium with reflectance below that at normal incidence," J. Opt. Soc. Am. A 19, 112-115 (2002)