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Proceedings Paper

Observation of speckle instability in Kerr random media
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Paper Abstract

The first experimental evidence of speckle instability is realized by using a liquid crystal cell with a photosensitive wall. The light is transversally scattered in the liquid crystal cell, where a two-dimensional controlled disorder is imprinted through suitable illuminations of the photoconductive wall and the nonlinearity is obtained through optical reorientation of the liquid crystal molecules. Above a critical threshold of the input intensity, the speckle pattern starts spontaneously to oscillate with a characteristic frequency related to the response time of the nonlinear medium. Moreover, the oscillation threshold depends on the scattering mean free path, thus, confirming the crucial role played by disorder in inducing the instability.

Paper Details

Date Published: 10 February 2012
PDF: 6 pages
Proc. SPIE 8274, Complex Light and Optical Forces VI, 827412 (10 February 2012); doi: 10.1117/12.909226
Show Author Affiliations
S. Residori, INLN, CNRS, Univ. de Nice-Sophia Antipolis (France)
U. Bortolozzo, INLN, CNRS, Univ. de Nice-Sophia Antipolis (France)
P. Sebbah, Institut Langevin (France)

Published in SPIE Proceedings Vol. 8274:
Complex Light and Optical Forces VI
Enrique J. Galvez; David L. Andrews; Jesper Glückstad; Marat S. Soskin, Editor(s)

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