Counterpropagating beams in biased photorefractive crystals: Anisotropic theory

K. Motzek, M. Belić, T. Richter, C. Denz, A. Desyatnikov, Ph. Jander, and F. Kaiser

Phys. Rev. E 71, 016610 – Published 19 January 2005

Abstract

We formulate an anisotropic nonlocal theory of the space charge field induced by the coherent counterpropagating beams in biased photorefractive crystals. We establish that the competition between the drift and diffusion terms has to be taken into account when the crystal $\hat{c}$ axis is tilted with respect to the propagation direction of the beams. We demonstrate that this configuration combines the features of both spatial soliton formation without energy exchange and two-wave mixing with energy exchange leading to pattern formation.

Received 25 July 2004

DOI:https://doi.org/10.1103/PhysRevE.71.016610

Authors & Affiliations

K. Motzek¹, M. Belić^2,3, T. Richter¹, C. Denz⁴, A. Desyatnikov^4,5, Ph. Jander⁴, and F. Kaiser¹

¹Institute of Applied Physics, Darmstadt University of Technology, 64289 Darmstadt, Germany
²Texas A&M University at Qatar, P. O. Box 5825, Doha, Qatar
³Institute of Physics, P. O. Box 57, Belgrade, Serbia
⁴Institute of Applied Physics, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
⁵Nonlinear Physics Centre, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200, Australia

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Vol. 71, Iss. 1 — January 2005

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