Two-dimensional solitary waves in arrays of nonlinear waveguides

Thomas Peschel and F. Lederer, Jena

Using both a variational and a fully numerical approach we derive solutions to the two-dimensional Discrete Nonlinear Schrödinger Equation which describes stationary optical beams in two-dimensional arrays of nonlinear waveguides. We compare our results to the respective solutions for the time- dependent case in a one-dimensional DNLS, which in contrast to the above fully discrete one represents a mixed discrete-continuous system. Possibilities for moving solitary waves are discussed on the basis of the Hamiltonian of the systems.
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