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Optical properties of KGd(WO 4 ) 2 single crystals studied by Brillouin spectroscopy
Author(s) -
Kasprowicz D.,
Mielcarek S.,
Majchrowski A.,
Michalski E.,
Drozdowski M.
Publication year - 2006
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200510622
Subject(s) - brillouin spectroscopy , brillouin zone , brillouin scattering , birefringence , phonon , principal axis theorem , spectroscopy , optics , materials science , scattering , condensed matter physics , chemistry , optical fiber , physics , geometry , mathematics , quantum mechanics
The results of a study of KGd(WO 4 ) 2 single crystals by Brillouin scattering method are presented. The Brillouin spectra for the acoustic phonons propagating in the [100], [010], [001], [110] and [101] directions, taken in 90° and 180° scattering geometry at room temperature have been recorded. Using the Brillouin spectroscopy the refractive indices for some directions of KGd(WO 4 ) 2 crystals were determined. The refractive indices were also calculated for the same directions by the rotation transformation of the principal optical axes of the optical indicatrix to the crystallographic directions of KGd(WO 4 ) 2 crystals. Moreover, some anomalies of the acoustic phonons propagating connected with birefringence of KGd(WO 4 ) 2 crystals were discussed. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)