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[5524] Artykuł: Electromagnetic-wave surfaces in absorptive uniaxial crystals. I. cones of zero birefringence and cones of equal absorption for isonormal wavesCzasopismo: Crystallography Reports Tom: 45, Zeszyt: 6, Strony: 985-990ISSN: 1063-7745 Wydawca: MAIK NAUKA/INTERPERIODICA PUBL, C/O AMERICAN INST PHYSICS, 2 HUNTINGTON QUANDRANGLE, STE 1NO1, MELVILLE, NY 11747-4502 USA Opublikowano: 2000 Autorzy / Redaktorzy / Twórcy Grupa MNiSW: Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A) Punkty MNiSW: 10 Klasyfikacja Web of Science: Article DOI Web of Science |
The existence conditions of the circular cones of propagation directions for isonormal electromagnetic waves of two independent branches for weakly absorptive optically uniaxial crystals with the same phase velocities (which corresponds to the zero birefringence) have been studied, and the opening angles of these cones have been determined. It is shown that these cones are formed solely due to absorption. The circular cones of directions, which correspond to the equal absorption coefficients of two independent isonormal waves, were also studied in a similar way. The regions of existence of these cones are described in the explicit analytical form. The dependence of the opening angles of these cones on the components of the complex tensor of the inverse electric permittivity of crystals is also analyzed. It is shown that these two types of cones cannot coexist for one crystal. (C) 2000 MAIK "Nauka/Interperiodica".