Applied Physics B

, Volume 95, Issue 3, pp 559–563

Hybrid nonlinearity supported by nonconventionally biased photorefractive crystals

  • P. Zhang
  • S. Liu
  • C. Lou
  • Y. Gao
  • J. Zhao
  • J. Xu
  • Z. Chen
Article

Abstract

We theoretically and experimentally demonstrate that a nonconventionally biased photorefractive crystal can support hybrid nonlinearity, i.e., coexistence of self-focusing and self-defocusing nonlinearities under an identical bias condition. It is revealed that the nonlinearity experienced by a one-dimensional (stripe) beam can be switched between self-focusing and self-defocusing solely by changing the beam orientation. For a two-dimensional beam, the hybrid nonlinearity leads to unusual nonlinear beam dynamics with enhanced anisotropy and nonlocality.

PACS

42.65.Jx 42.65.Hw 42.65.Tg 

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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • P. Zhang
    • 1
  • S. Liu
    • 1
  • C. Lou
    • 2
  • Y. Gao
    • 1
  • J. Zhao
    • 1
  • J. Xu
    • 2
  • Z. Chen
    • 2
    • 3
  1. 1.Shaanxi Key Laboratory of Optical Information Technology, School of ScienceNorthwestern Polytechnical UniversityXi’anChina
  2. 2.The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education and TEDA Applied Physics SchoolNankai UniversityTianjinaChina
  3. 3.Department of Physics and AstronomySan Francisco State UniversitySan FranciscoUSA

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