Lahini, Y;
Avidan, A;
Pozzi, F;
Sorel, M;
Morandotti, R;
Christodoulides, DN;
Silberberg, Y;
(2008)
Anderson localization and nonlinearity in one-dimensional disordered photonic lattices.
PHYS REV LETT
, 100
(1)
, Article 013906. 10.1103/PhysRevLett.100.013906.
![[thumbnail of 704715.pdf]](https://discovery.ucl.ac.uk/style/images/fileicons/application_pdf.png) Preview |
PDF
704715.pdf Download (316kB) |
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.
| Type: | Article |
|---|---|
| Title: | Anderson localization and nonlinearity in one-dimensional disordered photonic lattices |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1103/PhysRevLett.100.013906 |
| Language: | English |
| Additional information: | © 2008 The American Physical Society |
| Keywords: | INTRABAND DISCRETE BREATHERS, COHERENT BACKSCATTERING, FIELD DISTRIBUTIONS, WEAK LOCALIZATION, RANDOM-MEDIA, SYSTEMS, LIGHT, DELOCALIZATION, TRANSPORT, PROPAGATION |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/704715 |
Archive Staff Only
 |
View Item |
