Title

Anderson localization and nonlinearity in one-dimensional disordered photonic lattices

Authors

Authors

Y. Lahini; A. Avidan; F. Pozzi; M. Sorel; R. Morandotti; D. N. Christodoulides;Y. Silberberg

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Phys. Rev. Lett.

Keywords

INTRABAND DISCRETE BREATHERS; COHERENT BACKSCATTERING; FIELD; DISTRIBUTIONS; WEAK LOCALIZATION; RANDOM-MEDIA; SYSTEMS; LIGHT; DELOCALIZATION; TRANSPORT; PROPAGATION; Physics, Multidisciplinary

Abstract

We experimentally investigate the evolution of linear and nonlinear waves in a realization of the Anderson model using disordered one-dimensional waveguide lattices. Two types of localized eigenmodes, flat-phased and staggered, are directly measured. Nonlinear perturbations enhance localization in one type and induce delocalization in the other. In a complementary approach, we study the evolution on short time scales of delta-like wave packets in the presence of disorder. A transition from ballistic wave packet expansion to exponential (Anderson) localization is observed. We also find an intermediate regime in which the ballistic and localized components coexist while diffusive dynamics is absent. Evidence is found for a faster transition into localization under nonlinear conditions.

Journal Title

Physical Review Letters

Volume

100

Issue/Number

1

Publication Date

1-1-2008

Document Type

Article

Language

English

First Page

4

WOS Identifier

WOS:000252285500025

ISSN

0031-9007

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