EVIDENCE OF MICROSCOPIC-SCALE MODIFICATIONS IN OPTICAL-GLASSES SUPPORTING 2ND-HARMONIC GENERATION

Authors
CABRILLO C CUELLO GJ GARCIAFERNANDEZ P BERMEJO FJ PRUNERI V SAMOGGIA F KAZANSKY PG BENNINGTON SM
Citation
C. Cabrillo et al., EVIDENCE OF MICROSCOPIC-SCALE MODIFICATIONS IN OPTICAL-GLASSES SUPPORTING 2ND-HARMONIC GENERATION, Physics letters. A, 248(2-4), 1998, pp. 257-262
Citations number
21
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
248
Issue
2-4
Year of publication
1998
Pages
257 - 262
Database
ISI
SICI code
0375-9601(1998)248:2-4<257:EOMMIO>2.0.ZU;2-I
Abstract
We explore the extent of changes in dynamic correlations of vitreous S iO2 induced by treatments required to enable frequency doubling of inf rared light (poling) by means of inelastic neutron scattering. These a ppear as an excess of modes in certain regions of the frequency spectr um as well as a narrowing of the 100 meV peak. Such alterations are be tter ascribed to a change in ordering of the material than to the emer gence of ''defect'' modes, absent in the native sample. (C) 1998 Elsev ier Science B.V.