Düsseldorf 2007 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 48: Photonik I
Q 48.5: Talk
Wednesday, March 21, 2007, 17:30–17:45, 5J
Anisotropic self-focussing in two-dimensional photonic lattices — •Patrick Rose1, Bernd Terhalle1, Tobias Richter2, Anton Desyatnikov3, Christoph Bersch1, Jörg Imbrock1, Friedemann Kaiser2, Yuri Kivshar3, and Cornelia Denz1 — 1Institut für Angewandte Physik, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany — 2Institut für Angewandte Physik, Technische Universität Darmstadt, 64289 Darmstadt, Germany — 3Nonlinear Physics Center, Research School of Physical Sciences and Engineering, Australian National University, ACT 0200 Canberra, Australia
Wave propagation in periodic nonlinear structures is associated with many exciting novel phenomena that do not have counterparts in either homogeneous nonlinear media or periodic but linear systems. One of the well known examples is the formation of discrete self-localised states known as discrete solitons in one- and two-dimensional photonic lattices. The lattices of different symmetries can be induced optically in photorefractive crystals using periodic light patterns that propagate without a change of their profile. However, due to the electrooptic anisotropy of photorefractive materials the induced refractive index change strongly depends on orientation as well as polarization of the lattice wave.
We study the effect of anisotropy of photonic lattices on the symmetries of discrete solitons, generate experimentally two-dimensional discrete solitons in different lattice types and corroborate the experimental results by numerical simulations.