Determination of the Optical Properties of Absorbing Uniaxial Crystals from Reflectance at Oblique Incidence

Publisher Website
Google Scholar
Abstract
Equations are presented for determining the optical properties of an absorbing uniaxial crystal by measuring the reflectance from a basal plane as a function of the angle of incidence and the angle of polarization. The technique is applied to a pyrolytic graphite crystal to determine the optical properties at 632.8 nm. The results are calculated numerically by use of a combination of the Taylor-series and gradient methods. The best-fit values found for the optical constants of pyrolytic graphite at 632.8 nm are n0=2.55, ne=1.78, k0=0.66, and ke=0.00.