Localized modes in mini-gaps opened by periodically modulated intersite coupling in two-dimensional nonlinear lattices
Чланак у часопису
МетаподациПриказ свих података о документу
Spatially periodic modulation of the intersite coupling in two-dimensional (2D) nonlinear lattices modifies the eigenvalue spectrum by opening mini-gaps in it. This work aims to build stable localized modes in the new bandgaps. Numerical analysis shows that single-peak and composite two-and four-peak discrete static solitons and breathers emerge as such modes in certain parameter areas inside the mini-gaps of the 2D superlattice induced by the periodic modulation of the intersite coupling along both directions. The single-peak solitons and four-peak discrete solitons are stable in a part of their existence domain, while unstable stationary states (in particular, two-soliton complexes) may readily transform into robust localized breathers. (C) 2014 AIP Publishing LLC.
Извор:Chaos, 2014, 24, 2
- Фотоника микро и нано структурних материјала (RS-45010)
ISSN: 1054-1500 (print); 1089-7682 (electronic)