Garanovich, IvanSzameit, AlexanderPertsch, ThomasNolte, StefanNeshev, DragomirTuennermann, AndreasKrolikowski, WieslawSukhorukov, AndreyKivshar, Yuri2009-05-292010-12-202009-05-292010-12-20Optics Express15.15 (2007): 9737-97471094-4087http://hdl.handle.net/10440/348http://digitalcollections.anu.edu.au/handle/10440/348We study propagation of light beams in two-dimensional photonic lattices created by periodically curved waveguide arrays. We demonstrate that by designing the waveguide bending, one can control not only the strength and sign of the beam diffraction, but also to engineer the effective geometry and even dimensionality of the two-dimensional photonic lattice. We reveal that diffraction of different spectral components of polychromatic light can display completely different patterns in the same periodically modulated structure, e.g. one-dimensional, hexagonal, or rectangular. Our results suggest novel opportunities for efficient selfcollimation, focusing, and reshaping of light beams in two-dimensional photonic structures.11 pages"OSA will grant the authors permission to deposit the publisher’s pdf from their Optics Express articles into the repository with the proper citation (reference number or journal /volume/page/year citation)." - from email received from Authorized Agent, The Optical Society, 27/05/10DiffractionIntegrated optics devices2007-07-2010.1364/OE.15.0097372015-12-08