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Polariton Dispersion in Biaxial and Uniaxial Crystals
Author(s) -
Merten L.
Publication year - 1968
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19680300204
Subject(s) - polariton , materials science , dispersion (optics) , condensed matter physics , uniaxial crystal , optics , optoelectronics , physics , optical axis , lens (geology)
Complete dispersion relations of polaritons are given for biaxial and uniaxial crystals. In the limiting cases k → 0 and k → ∞ ( k wave vector) very general conclusions can be drawn concerning their frequencies and directions of polarization. For uniaxial crystals the polaritons are subdivided in ordinary and extraordinary ones with orientation independent or orientation dependent frequencies, respectively. The ordinary polaritons are of transverse type whereas extraordinary are of mixed transverse‐longitudinal type for a general orientation.