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.
© 2006 Optical Society of America
Original Manuscript: August 30, 2005
Revised Manuscript: November 30, 2005
Manuscript Accepted: December 6, 2005
Luis Morales-Molina and Rodrigo A. Vicencio, "Trapping of discrete solitons by defects in nonlinear waveguide arrays," Opt. Lett. 31, 966-968 (2006)