Two-dimensional soliton-induced refractive index change in photorefractive crystals Academic Article uri icon

abstract

  • An analysis of light-induced space-charge field, valid for the propagation of two-dimensional solitons in photorefractive (PR) crystals, is carried out. Under conditions appropriate to the formation of self-trapped beams, the equation for the electrostatic potential is simplified and solved, to obtain an analytical expression for the space-charge field, and thus the refractive index change. The expression exhibits an excellent agreement with the numerical calculation for a variety of localized two-dimensional light beams, in particular for the bright fundamental and higher-order vortex spatial screening solitary waves. Based on analytical results, a class of models for the local isotropic two-dimensional space-charge field is proposed. They are compared to the general nonlocal anisotropic model, using the propagation and breakup of vortex beams as an example. 2003 Elsevier B.V. All rights reserved.

published proceedings

  • OPTICS COMMUNICATIONS

author list (cited authors)

  • Calvo, G. F., Agull-Lpez, F., Carrascosa, M., Belic, M. R., & Vujic, D.

citation count

  • 11

complete list of authors

  • Calvo, GF||Agulló-López, F||Carrascosa, M||Belic, MR||Vujic, D

publication date

  • November 2003