I. Abdulhalim, Analytic formulae for the refractive indices and the propagation angles inbiaxial and gyrotropic media, OPT COMMUN, 157(1-6), 1998, pp. 265-272
An exact analytic solution is found to the dispersion equation in optically
biaxial and gyrotropic structures. Explicitly simple expressions are deriv
ed for the refractive indices and the propagation directions of the optical
eigenwaves. (C) 1998 Elsevier Science B.V. All rights reserved.