Enhanced distribution of a wave-packet in lattices with disorder and nonlinearity

Uta Naether, Alejandro J. Martínez, M.I. Molina and R.A. Vicencio
OPTICS EXPRESS 21, 1 (2013)


We show, numerically and experimentally, that the presence
of weak disorder results in an enhanced energy distribution of an initially
localized wave-packet, in one- and two-dimensional finite lattices. The
addition of a focusing nonlinearity facilitates the spreading effect even
further by increasing the wave-packet effective size. We find a clear
transition between the regions of enhanced spreading (weak disorder) and
localization (strong disorder).

DOI: http://dx.doi.org/

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