Reflection by anisotropic media is characterized by the four reflection amplitudes rpp, rss, rps, and rsp. We show that rpp can be zero at angles θpp, the anisotropic Brewster angles, and that a quantity related to θpp satisfies a quartic equation. When the refractive index of the medium of incidence lies between the ordinary and the extraordinary indices of the crystal, it is possible for rss to be zero at an angle θss, and there exist four equivalent orientations of the crystal optic axis for which rpp, rss, and either rps or rsp are simultaneously zero, at angle of incidence equal to arctan (no/n1).
© 1993 Optical Society of America
Original Manuscript: July 13, 1992
Revised Manuscript: April 1, 1993
Manuscript Accepted: April 2, 1993
Published: September 1, 1993
John Lekner, "Brewster angles in reflection by uniaxial crystals," J. Opt. Soc. Am. A 10, 2059-2064 (1993)