Emergence of structural anisotropy in optical glasses treated to support second harmonic generation

被引：10

作者：

Cabrillo, C

Cuello, GJ

Garcia-Fernandez, P

Bermejo, FJ

Pruneri, V

Kazansky, PG

Bennington, SM

Howells, WS

机构：

[1] Inst Estructura Mat, E-28006 Madrid, Spain

[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

[3] Rutherford Appleton Lab, Didcot OX11 0QX, Oxon, England

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.81.4361

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Structural alterations induced by "thermal poling" in upsilon-SiO2, a treatment which enables the glass to double the frequency of impinging infrared light, are revealed by neutron diffraction to be a breakdown of macroscopic isotropy. This leads to concomitant changes in the vibrational density of states measured by inelastic neutron scattering. The observations are consistent with emergence of partial ordering within the glassy matrix along the direction of an electrostatic field applied during the poling treatment, [S0031-9007(98)07619-4].

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页码：4361 / 4364

页数：4

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