München 2004 – scientific programme
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Q: Quantenoptik und Photonik
Q 24: Photonik in komplexen und periodischen Strukturen
Q 24.5: Talk
Tuesday, March 23, 2004, 17:30–17:45, HS 204
Formation of two-dimensional optical nonlinear periodic lattices in photorefractive crystals — •N. Sagemerten1, A.S. Desyatnikov1, C. Denz1, D. Neshev2, M. Petrovic3, A. Strinic3, and M. Belic3 — 1Institut für Angewandte Physik, Westfälische Wilhelms-Universität Münster, D-48149 Müenster — 2Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200, Australia — 3Institute of Physics, University of Belgrade, 11001 Belgrade, Serbia
Spatial optical solitons are of interest due to their ability for self-adjustable waveguiding and versatile interaction capabilities like light-induced Y and X couplers. However, these investigations were up to now limited to single solitons. Here we investigate theoretically and experimentally the behavior of large two-dimensional lattices of solitons and their waveguiding capabilities. In such a case, neighboring solitons may experience repulsion or attraction depending on phase-dependent coherent as well as separation-dependent incoherent interactions. Lattices composed out of incoherent solitons were found to be more stable than lattices with coherent in-phase solitons for identical conditions. We use the manipulation of phase across the lattice to achieve closer packing while maintaining propagation without interaction. Further we show the interaction of different beams with the lattice.