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Rayleigh–Brillouin scattering in calcium aluminosilicate glasses
Author(s) -
Hwa LuuGen
Publication year - 1998
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/(sici)1097-4555(199804)29:4<269::aid-jrs234>3.0.co;2-2
Subject(s) - rayleigh scattering , brillouin scattering , brillouin zone , light scattering , brillouin spectroscopy , refractive index , polarizability , optics , materials science , scattering , chemistry , mineralogy , optical fiber , physics , organic chemistry , molecule
Rayleigh–Brillouin scattering of calcium aluminosilicate (CAS) glasses was studied. The Rayleigh–Brillouin intensities and Brillouin wavenumber shifts along with measurements of refractive index and density allowed the calculation of sound velocities, Pockels elasto‐optic coefficients, elastic constants and scattering loss of the material. The physical significances of the Pockels coefficients and elastic constants are discussed in the light of existing theories. The derived loss values of CAS glasses are lower than that observed in fused silica. The low intrinsic Rayleigh scattering loss in these glasses is shown to be reconciled by the bond polarizability model developed by Lines. © 1998 John Wiley & Sons, Ltd.