NONLINEAR REFRACTION IN AQUEOUS COLLOIDAL GOLD

Authors
MEHENDALE SC MISHRA SR BINDRA KS LAGHATE M DHAMI TS RUSTAGI KC
Citation
Sc. Mehendale et al., NONLINEAR REFRACTION IN AQUEOUS COLLOIDAL GOLD, Optics communications, 133(1-6), 1997, pp. 273-276
Citations number
15
Categorie Soggetti
Optics
Journal title
Optics communications → ACNP
ISSN journal
00304018
Volume
133
Issue
1-6
Year of publication
1997
Pages
273 - 276
Database
ISI
SICI code
0030-4018(1997)133:1-6<273:NRIACG>2.0.ZU;2-O
Abstract
Nonlinear refraction in aqueous colloidal gold at 527 nm was studied u sing the z-scan technique. While a z-scan with a 35 ns laser showed a large negative lensing, a z-scan with a 4 ps laser showed no measurabl e refraction. The observed nonlinear refraction is shown to be of ther mal origin resulting from energy transfer from gold particles to the w ater molecules.