title: Trapping of discrete solitons by defects in nonlinear waveguide arrays.
abstract: We study the trapping process of moving discrete solitons by linear and nonlinear impurities embedded in a one-dimensional nonlinear cubic array. We show that there exist specific values for the strength of the impurity and for the angle where a strong trapping is obtained. We introduce a criterion for studying the scattering dynamics of localized waves in nonlinear extended systems where the trapping of energy takes place.
authors.affiliation: Max-Planck-Institut für Physik Komplexer Systeme, Nöthnilzer Strasse 38, D-01187 Dresden, Germany. lmolina@pks.mpg.de
authors.forename: Luis
authors.initials: L
authors.lastname: Morales-Molina
authors.forename: Rodrigo A
authors.initials: RA
authors.lastname: Vicencio