Frankfurt 2006 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 7: Photonik in komplexen und periodischen Strukturen I
Q 7.6: Vortrag
Montag, 13. März 2006, 12:25–12:40, H14
Two-dimensional self trapped photonic lattices in anisotropic photorefractive media — •Bernd Terhalle1, Nina Sagemerten1, Denis Träger1, Cornelia Denz1, Anton S. Desyatnikov2, Dragomir N. Neshev2, Wieslaw Krolikowski2, and Yuri S. Kivshar2 — 1Institut für Angewandte Physik, Westfälische Wilhelms-Universität Münster — 2Nonlinear Physics Center and Laser Physics Center, Center for Ultra-high bandwidth Devices for Optical Systems (CUDOS), Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia
Photonic structures provide many novel possibilities to control light propagation, because the wave band-gap spectrum and diffraction are strongly affected by the periodic refractive index modulation. Lattices of different symmetries can be induced optically in photorefractive crystals using periodic light patterns that propagate without change in their profile. Due to the anisotropy of photorefractive materials, ordinary polarised light propagates in an almost linear regime, whereas extraordinary polarised light experiences strong photorefractive nonlinearity. Therefore one can distinguish between linear, nonlinear and so called mixed lattices. In our contribution, we investigate structure, stability and waveguiding properties of such lattices in real space as well as in Fourier space.