Nonlinear optical diffraction effects and solitons due to anisotropic charge-diffusion-based self-interaction

B. Crosignani, A. Degasperis, E. Del Re, P. Di Porto, A. J. Agranat

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

We report the first observation of self-modified optical diffraction, beam ellipticity recovery and conservation, and intensity independent self-focusing in an anisotropic diffusion-type nonlinearity realized in ferroelectrics heated above the centrosymmetric transition. The interaction, a photorefractive diffusion-driven quadratic nonlinearity, constitutes the first known natural realization of a higher-order logarithmic nonlinearity and allows an analytical description of the observed phenomena and the prediction of a class of noncircular solitons with no characteristic length scale.

Original languageAmerican English
Pages (from-to)1664-1667
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number8
DOIs
StatePublished - 1999

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