Volume 49, Number 5, March I 2000
|Page(s)||564 - 568|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics, and fluid dynamics|
|Published online||01 September 2002|
Laser beam self-phase modulation by a film of water-in-oil microemulsion
Istituto Nazionale per la Fisica della Materia, Università di Napoli “Federico II”
Dipartimento di Scienze Fisiche, Facoltà d'Ingegneria
p.le Tecchio 80, I 80125 Napoli, Italy
Corresponding author: email@example.com
Accepted: 11 December 1999
We report, for the first time to our knowledge, the observation of optical nonlinearity by an optically thin film of water-in-oil microemulsion (AOT/water/decane). The new effect is observed 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. Experimental results have been obtained by self-phase modulation. Two slightly different configurations have been used: sample at the focal plane and sample behind it. Optical theory is introduced for a quantitative analysis of results. Traditional sources of nonlinearity in artificial Kerr-like media cannot completely explain the material behavior. Microemulsions now appear to be suitable as low-cost media for nonlinear optics devices.
PACS: 42.65.Jx – Beam trapping, self-focusing, and thermal blooming / 77.84.Nh – Liquids, emulsions, and suspensions; liquid crystals
© EDP Sciences, 2000
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