Traeger, DenisFischer, RobertNeshev, DragomirDenz, CorneliaKrolikowski, WieslawSukhorukov, AndreyKivshar, Yuri2009-06-042010-12-202009-06-042010-12-20Optics Express 14.5 (2006): 1913-19231094-4087http://hdl.handle.net/10440/404http://digitalcollections.anu.edu.au/handle/10440/404We generate experimentally different types of two-dimensional Bloch waves of a square photonic lattice by employing the phase imprinting technique.We probe the local dispersion of the Bloch modes in the photonic lattice by analyzing the linear diffraction of beams associated with the highsymmetry points of the Brillouin zone, and also distinguish the regimes of normal, anomalous, and anisotropic diffraction through observations of nonlinear self-action effects.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, 27/05/10nonlinear optics, transverse effects inself-action effectsdiffraction gratings2006-03-0610.1364/OE.14.0019132015-12-12