Self-Focusing and Defocusing in Waveguide Arrays

R. Morandotti, H. S. Eisenberg, Y. Silberberg, M. Sorel, and J. S. Aitchison
Phys. Rev. Lett. 86, 3296 – Published 9 April 2001
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Abstract

We show that two regimes of diffraction exist in arrays of waveguides, depending upon the input conditions. At higher powers, normal diffraction leads to self-focusing and to the formation of bright solitons through the nonlinear Kerr effect. By slightly changing the input conditions, light experiences anomalous diffraction and is nonlinearly defocused. For the first time, self-focusing and self-defocusing have been achieved for the same medium, structure, and wavelength.

  • Received 21 June 2000

DOI:https://doi.org/10.1103/PhysRevLett.86.3296

©2001 American Physical Society

Authors & Affiliations

R. Morandotti*, H. S. Eisenberg, and Y. Silberberg

  • Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel 76100

M. Sorel and J. S. Aitchison

  • Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow, Scotland, G12 8QQ

  • *Also with the Department of Electronics and Electrical Engineering, University of Glasgow, Glasgow, Scotland, G12 8QQ.

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Vol. 86, Iss. 15 — 9 April 2001

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