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Phase twisted modes and current reversals in a lattice model of waveguide arrays with nonlinear coupling

Michael Öster and Magnus Johansson
Phys. Rev. E 71, 025601(R) – Published 9 February 2005

Abstract

We consider a lattice model for waveguide arrays embedded in nonlinear Kerr media. Inclusion of nonlinear coupling results in many phenomena involving complex, phase-twisted, stationary modes. The norm (Poynting power) current of stable plane-wave solutions can be controlled in magnitude and direction, and may be reversed without symmetry-breaking perturbations. Also stable localized phase-twisted modes with zero current exist, which for particular parameter values may be compact and expressed analytically. The model also describes coupled Bose-Einstein condensates.

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  • Received 4 September 2004

DOI:https://doi.org/10.1103/PhysRevE.71.025601

©2005 American Physical Society

Authors & Affiliations

Michael Öster* and Magnus Johansson

  • Department of Physics and Measurement Technology (IFM), Linköping University, S-581 83 Linköping, Sweden

  • *Electronic address: micos@ifm.liu.se
  • Electronic address: mjn@ifm.liu.se

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Issue

Vol. 71, Iss. 2 — February 2005

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