Inelastic ultraviolet Brillouin scattering from superpolished vitreous silica

Laboratoire Charles Coulomb, UMR 5221, CNRS, F-34095 Montpellier, France(Dated: 29 July 2011)A previous inelastic UV scattering experiment on silica glass is reproduced using a high grade su-perpolished sample. In the pristine sample condition, surface scattering is not observable comparedto Rayleigh scattering from the bulk. However, exposure to a fluence of the order of 100 J/cm