Article,

Beam Instabilities in the Scale-Free Regime

, , and .
Phys. Rev. Lett., 108 (3): 033901 (January 2012)
DOI: 10.1103/PhysRevLett.108.033901

Abstract

The instabilities arising in a one-dimensional beam sustained by the diffusive photorefractive nonlinearity in out-of-equilibrium ferroelectrics are theoretically and numerically investigated. In the \\\"scale-free model\\\", in striking contrast with the well-known spatial modulational instability, two different beam instabilities dominate: a defocusing and a fragmenting process. Both are independent of the beam power and are not associated to any specific periodic pattern.

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