Ultrafast Optical Nonlinearity in PMMA-TiO2 Nanocomposites

Details Ultrafast Optical Nonlinearity in PMMA-TiO2 Nanocomposites Ultrafast Optical Nonlinearity in PMMA-TiO2 Nanocomposites

2003-01-10

arxiv.org/abs/cond-mat/0301153v2

Applied Physics Letters, Vol. 82, (2003), p. 2691; Virtual Journal of Ultrafast Science, Volume 2, Issue 5, May 2003

Physics

Condensed Matter

Materials Science

12 pages, 3 figures. To appear in Appl. Phys. Lett. (2003)

Scientific paper

10.1063/1.1568544

With 780-nm, 250-fs laser pulses, ultrafast optical nonlinearity has been observed in a series of thin films containing PMMA-TiO2 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% weight percentage of titanium isopropoxide. TEM shows the presence of the 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-TiO2 nanocomposites for all-optical switching.

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