title: Negative refraction and spatial echo in optical waveguide arrays.
abstract: The special symmetry properties of the discrete nonlinear Schrödinger equation allow a complete revival of the initial wave function employed in the context of stationary propagation of light in a waveguide array. As an inverting system, we propose a short array of almost isolated waveguides, which cause a relative π phase shift in the neighboring waveguides. By means of numerical simulations of the model equations, we demonstrate what we believe is a novel mechanism for the negative refraction of spatial solitons.
authors.affiliation: Max-Planck Institute for the Physics of Complex Systems, Dresden, Germany. khomeriki@hotmail.com
authors.forename: Ramaz
authors.initials: R
authors.lastname: Khomeriki
authors.forename: Lasha
authors.initials: L
authors.lastname: Tkeshelashvili