Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

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

: Naether, Uta; Rojas-Rojas, Santiago; Martínez, Alejandro J.; Stützer, Simon; Tünnermann, Andreas; Nolte, Stefan; Molina, Mario I.; Vicencio, Rodrigo A.; Szameit, Alexander

Postprint (PDF; )

Optics Express 21 (2013), No.1, pp.927-934
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer IOF ()

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).