Femtosecond two-beam coupling energy transfer from Raman and electronic nonlinearities

Citation
S. Smolorz et F. Wise, Femtosecond two-beam coupling energy transfer from Raman and electronic nonlinearities, J OPT SOC B, 17(9), 2000, pp. 1636-1644
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
ISSN journal
0740-3224 → ACNP
Volume
17
Issue
9
Year of publication
2000
Pages
1636 - 1644
Database
ISI
SICI code
0740-3224(200009)17:9<1636:FTCETF>2.0.ZU;2-#
Abstract
We present a study of two-beam coupling energy transfer arising from electr onic and nuclear (i.e., Raman) contributions to the third-order refractive nonlinearity. Calculations of transient two-beam coupling in fused silica w ith no free parameters agree reasonably well with experiments. Numerical ca lculations of two-beam coupling in a medium with a purely electronic nonlin earity modeled by a Debye-type response are presented. The calculations ind icate that it should be possible, although challenging, to measure electron ic two-beam coupling for response times as short as similar to 0.1 fs. Expe riments designed to isolate the electronic response fail to produce two-bea m coupling signals but do indicate that the time scale of the electronic re sponse is well below ifs. (C) 2000 Optical Society of America [S0740-3224(0 0)02109-3].