Instabilities of waves in nonlinear disordered media
Disordered Systems and Neural Networks
2016-08-31 v1 Mesoscale and Nanoscale Physics
Soft Condensed Matter
Chaotic Dynamics
Optics
Abstract
We develop a self-consistent theory of temporal fluctuations of a speckle pattern resulting from the multiple scattering of a coherent wave in a weakly nonlinear disordered medium. The speckle pattern is shown to become unstable if the nonlinearity exceeds a threshold value. The instability is due to a feedback provided by the multiple scattering and manifests itself in spontaneous fluctuations of the scattered intensity. The development of instability is independent of the sign of nonlinearity.
Cite
@article{arxiv.cond-mat/0006136,
title = {Instabilities of waves in nonlinear disordered media},
author = {S. E. Skipetrov and R. Maynard},
journal= {arXiv preprint arXiv:cond-mat/0006136},
year = {2016}
}
Comments
6 pages, 2 PostScript figures, accepted to Phys. Rev. Lett