Article

Applied Physics B

, Volume 86, Issue 3, pp 399-405

Anisotropic photonic lattices and discrete solitons in photorefractive media

  • B. TerhalleAffiliated withInstitut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität Email author 
  • , A.S. DesyatnikovAffiliated withNonlinear Physics Center, Research School of Physical Sciences and Engineering, Australian National University
  • , C. BerschAffiliated withInstitut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität
  • , D. TrägerAffiliated withInstitut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität
  • , L. TangAffiliated withInstitut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität
  • , J. ImbrockAffiliated withInstitut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität
  • , Y.S. KivsharAffiliated withNonlinear Physics Center, Research School of Physical Sciences and Engineering, Australian National University
  • , C. DenzAffiliated withInstitut für Angewandte Physik and Center for Nonlinear Science (CeNoS), Westfälische Wilhelms-Universität

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Abstract

We study experimentally two-dimensional periodic photonic lattices optically imprinted in photorefractive nonlinear media, and explore the effect of anisotropy on the induced refractive-index patterns. The orientation anisotropy is demonstrated by comparing square and diamond lattices, while the polarization anisotropy is shown to distinguish ordinarily and extraordinarily polarized light. In particular, the extraordinarily polarized lattice induces much stronger refractive-index modulation for the same conditions. Finally, we exploit the photorefractive anisotropy to generate a quasi-one-dimensional refractive-index pattern for the observation of two-dimensional solitons and corroborate these experiments by numerical simulations.