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10 February 2012 Observation of speckle instability in Kerr random media
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Proceedings Volume 8274, Complex Light and Optical Forces VI; 827412 (2012)
Event: SPIE OPTO, 2012, San Francisco, California, United States
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.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
S. Residori, U. Bortolozzo, and P. Sebbah "Observation of speckle instability in Kerr random media", Proc. SPIE 8274, Complex Light and Optical Forces VI, 827412 (10 February 2012);

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