Spectroscopy as a tool for local density measurement in vitreous silica

Coralie Weigel (1) , Marie Foret (1) , Bernard Hehlen (1) , Benoit Ruffle (1)

1 L2C - Laboratoire Charles Coulomb

The paper will discuss the possibility for light spectroscopies, e.g. Brillouin Light Scat- tering or Raman Scattering, to locally monitor the densification of amorphous silica. It is indeed well-known that silica significantly densifies under high stresses, either elastically as for example during a high-pressure experiment in a diamond-anvil cell below about 10 GPa or plastically above that limit. Further, this elastic limit strongly depends on the temperature. Irradiation-induced density changes are also observed using ultra-short laser pulses, neutrons or other particles. All these different routes lead to substantial structural modifications which in turn alter the response of silica to light spectroscopy in a complex manner.

Domaines: Autre [cond-mat.other]; Vibrations [physics.class-ph]; Vibrations [physics.class-ph]

Coralie Weigel, Marie Foret, Bernard Hehlen, Benoit Ruffle. Spectroscopy as a tool for local density measurement in vitreous silica. Internat. Conf. on the Phys. of Non-Cryst. Solids & 14th Eur. Soc. of Glass Conf. (PNCS-ESG 2018), Jul 2018, St Malo, France. ⟨hal-01908978⟩