Emergence of structural anisotropy in Optical Glasses treated to support Second Harmonic Generation

Details Emergence of structural anisotropy in Optical Glasses treated to support Second Harmonic Generation Emergence of structural anisotropy in Optical Glasses treated to support Second Harmonic Generation

1998-07-08

arxiv.org/abs/cond-mat/9807114v1

Phys. Rev. Lett. 81, 4361-4364 (1998)

Physics

Condensed Matter

Soft Condensed Matter

LaTeX document, RevTex style, 6 pp., 2 figures in EPS format

Scientific paper

10.1103/PhysRevLett.81.4361

Structural alterations in v-SiO2 induced by "thermal poling", a treatment which makes the glass able to double the frequency of an impinging infrared light, are revealed by neutron diffraction as a breakdown of the macroscopic isotropy. This leads to concomitant changes in the vibrational density of states measured by inelastic neutron scattering. The observations are found to be consistent with the emergence of partial ordering within the glassy matrix along the direction of an electrostatic field applied during the poling treatment.

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