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- W1983710400 abstract "A two-dimensional nonlinear Schrödinger lattice with nonlinear coupling, modelling a square array of weakly coupled linear optical waveguides embedded in a nonlinear Kerr material, is studied. We find that despite a vanishing energy difference (Peierls–Nabarro barrier) of fundamental stationary modes the mobility of localized excitations is very poor. This is attributed to a large separation in parameter space of the bifurcation points of the involved stationary modes. At these points the stability of the fundamental modes is changed and an asymmetric intermediate solution appears that connects the points. The control of the power flow across the array when excited with plane waves is also addressed and shown to exhibit great flexibility that may lead to applications for power-coupling devices. In certain parameter regimes, the direction of a stable propagating plane-wave current is shown to be continuously tunable by amplitude variation (with fixed phase gradient). More exotic effects of the nonlinear coupling terms like compact discrete breathers and vortices, and stationary complex modes with nontrivial phase relations are also briefly discussed. Regimes of dynamical linear stability are found for all these types of solutions." @default.
- W1983710400 created "2016-06-24" @default.
- W1983710400 creator A5045647348 @default.
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- W1983710400 date "2009-01-01" @default.
- W1983710400 modified "2023-10-14" @default.
- W1983710400 title "Stability, mobility and power currents in a two-dimensional model for waveguide arrays with nonlinear coupling" @default.
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- W1983710400 doi "https://doi.org/10.1016/j.physd.2008.08.006" @default.
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