@booklet {3123,
	title = {Nonlinear optical diffraction effects and solitons due to anisotropic charge-diffusion-based self-interaction},
	howpublished = {Physics Review},
	volume = {82},
	number = {8},
	year = {1999},
	month = {FEB 22, 1999},
	pages = {1664 - 1667},
	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.},
	keywords = {Multidisciplinary, Physics},
	isbn = {00319007},
	url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edswsc\&AN=000078715100014\&site=eds-live},
	author = {Crosignani, B. and Degasperis, A and DelRe, E. and Di Porto, P and Agranat, A.J.}
}
