VUV Brillouin scattering from superpolished vitreous silica

Details VUV Brillouin scattering from superpolished vitreous silica VUV Brillouin scattering from superpolished vitreous silica

2011-09-14

arxiv.org/abs/1109.3004v2

Phys. Rev. B 84 132201 (2011)

Physics

Condensed Matter

Materials Science

4 pages, 4 figures, revised manuscript

Scientific paper

10.1103/PhysRevB.84.132201

A previous inelastic UV scattering experiment on silica glass is reproduced using a high grade superpolished sample. In the pristine sample condition, surface scattering is not observable compared to Rayleigh scattering from the bulk. However, exposure to a fluence of the order of 100 J/cm$^2$ at photon energies slightly below the electronic gap generates observable surface damage. This occurs after a few hours illumination with the monochromatic spectrometer beam. No anomaly in the Brillouin linewidth was found up to an excitation energy of 7.8 eV.

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