TITLE

Ultrafast optical nonlinearity in poly(methylmethacrylate)-TiO[sub 2] nanocomposites

AUTHOR(S)
Elim, H. I.; Ji, W.; Yuwono, A. H.; Xue, J. M.; Wang, J.
PUB. DATE
April 2003
SOURCE
Applied Physics Letters;4/21/2003, Vol. 82 Issue 16, p2691
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
With 780-nm, 250-fs laser pulses, ultrafast optical nonlinearity has been observed in a series of thin films containing poly(methyl methacrylate) (PMMA)-TiO[SUB2] nanocomposites, which are synthesized by a simple technique of in-situ sol-gel/polymerization. The best figures of merit are found in one of the films prepared with a 60 wt % of titanium isopropoxide. Transmission electron microscopy shows the presence of 5-nm-diameter particles in the film. The observed optical nonlinearity has a recovery time of ∼1.5 ps. These findings suggest the strong potential of PMMA-TiO[SUB2] nanocomposites for all-optical switching.
ACCESSION #
9518369

 

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