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Start Over Author "Taki, Majid" Topic physical sciences
2 results on '"Taki, Majid"'

1. Experimental evidence of convective and absolute instabilities in optics.

Author

Szwaj, Christophe, Louvergneaux, Eric, Agez, Gonzague, Glorieux, Pierre, and Taki, Majid

Subjects
PHYSICAL sciences, NOISE, FLUIDS, LIGHT sources, LASER beams, LIQUID crystals
Abstract

We evidence experimentally the convective and absolute instabilities in an optical system. In our system, the presence of noise and spatial non-uniformities (as in most of the “real systems”) add additional complexities. First we derive analytical expressions of both thresholds for the ideal noiseless and spatially uniform situation. Then numerical simulations allow to determine signatures of those instabilities. The corresponding noise sustained and dynamical patterns are observed experimentally in a liquid crystal layer subjected to a laser beam with tilted feedback. © 2004 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2004
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2. Introduction: Dissipative localized structures in extended systems.

Author

Tlidi, Mustapha, Taki, Majid, and Kolokolnikov, Theodore

Subjects
*OPTICS, *INFORMATION retrieval, *INFORMATION technology, *COMPUTER storage devices, *PHYSICAL sciences, *INDUSTRIAL lasers
Abstract

Localized structures belong to the class of dissipative structures found far from equilibrium. Contributions from the most representative groups working on a various fields of natural science such as biology, chemistry, plant ecology, mathematics, optics, and laser physics are presented. The aim of this issue is to gather specialists from these fields towards a cross-fertilization among these active areas of research and thereby to present an overview of the state of art in the formation and the characterization of dissipative localized structures. Nonlinear optics and laser physics have an important part in this issue because of potential applications in information technology. In particular, localized structures could be used as “bits” for parallel information storage and processing. [ABSTRACT FROM AUTHOR]

Published
2007
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