Ultrafast optical nonlinearity in poly(methylmethacrylate)-TiO2 nanocomposites
- 21 April 2003
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 82 (16), 2691-2693
- https://doi.org/10.1063/1.1568544
Abstract
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.Comment: 12 pages, 3 figures. To appear in Appl. Phys. Lett. (2003Keywords
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