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Proceedings Paper

Noncritical microemulsions as nonlinear optical material
Author(s): Luciano Rosario Maria Vicari; A. C. Barone
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Paper Abstract

Water in oil microemulsions are systems of spherical droplets of water coated by a monolayer of surfactant molecules, immersed in oil. Initially we have studied the optical nonlinear behavior of water in oil microemulsion by the Self-Phase-Modulation of a gaussian laser beam by an optically thin film. The material is WAD (water/AOT/decane, where AOT denotes sodium-bis-di-ethyl-sulfosuccinate) far from critical points and near the percolative transition from electrically insulating to electrically conducting. We have observed optical nonlinearity in the L2 area of the phase diagram, near the percolation line and far from the one-phase two-phase boundary line. In this point, the material turbidity is very low. Strong optical nonlinearity has been reported. Nonlinear optical effects in a Water/AOT/Decane (WAD) microemulsion have been experimentally studied also in a pump probe configuration. We detect the variation of the on axis optical intensity of the probe beam as generated by the concentration profile induced in an optically thin film of microemulsion by the pump beam. Results seem to suggest the hypothesis of a chain like shape of the clusters.

Paper Details

Date Published: 1 November 2002
PDF: 10 pages
Proc. SPIE 4812, Nonlinear Spectroscopy, (1 November 2002); doi: 10.1117/12.451374
Show Author Affiliations
Luciano Rosario Maria Vicari, Univ. degli Studi di Napoli Federico II (Italy)
A. C. Barone, Univ. degli Studi di Napoli Federico II (Italy)

Published in SPIE Proceedings Vol. 4812:
Nonlinear Spectroscopy
David L. Andrews, Editor(s)

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