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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 2 — Jan. 23, 2006
  • pp: 794–799

Counterpropagating self-trapped beams in optical photonic lattices

M. Belić, D. Jović, S. Prvanović, D. Arsenović, and M. Petrović  »View Author Affiliations


Optics Express, Vol. 14, Issue 2, pp. 794-799 (2006)
http://dx.doi.org/10.1364/OPEX.14.000794


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Abstract

Dynamical properties of counterpropagating (CP) mutually incoherent self-trapped beams in optically induced photonic lattices are investigated numerically. A local model with saturable Kerr-like nonlinearity is adopted for the photorefractive media, and an optically generated two-dimensional fixed photonic lattice introduced in the crystal. Different incident beam structures are considered, such as Gaussians and vortices of different topological charge. We observe spontaneous symmetry breaking of the head-on propagating Gaussian beams as the coupling strength is increased, resulting in the splitup transition of CP components. We see discrete diffraction, leading to the formation of discrete CP vector solitons. In the case of vortices, we find beam filamentation, as well as increased stability of the central vortex ring. A strong pinning of filaments to the lattice sites is noted. The angular momentum of vortices is not conserved, either along the propagation direction or in time, and, unlike the case without lattice, the rotation of filaments is not as readily observed.

© 2006 Optical Society of America

OCIS Codes
(190.5330) Nonlinear optics : Photorefractive optics
(190.5530) Nonlinear optics : Pulse propagation and temporal solitons

ToC Category:
Nonlinear Optics

Citation
M. Belić, D. Jović, S. Prvanović, D. Arsenović, and M. Petrović, "Counterpropagating self-trapped beams in optical photonic lattices," Opt. Express 14, 794-799 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-2-794


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