Abstract
Cavity solitons (CSs) are self-localized spots formed in the transverse plane of a nonlinear cavity. They have been observed in various macroscopic systems, and predicted and observed in microscopic, semiconductor-based systems too. They are formed in a spatially extended, bistable, and modulationally unstable system driven by a coherent field (holding beam) and appear generally as bright spots sitting on a dark background. Their excitation is accomplished either spontaneously, by the noise present in the system, or by a local excitation. CSs can be independently addressed with a control beam and can be manipulated with the aid of phase or amplitude gradients of some control parameters. These properties make them interesting objects for all-optical information processing applications, for which they can be thought of as logical bit units for parallel information processing with reconfigurable capabilities. In that respect, semiconductor materials are particularly suited thanks to the time scales (1 ns or less) and spatial scales (~ 10 mm) that are involved.
© 2007 IEEE
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