Molina, Mario I.Kivshar, Yuri2016-03-152016-03-150146-9592http://hdl.handle.net/1885/100245We analyze localization of light at the interface separating square and hexagonal photonic lattices, as recently realized experimentally in two-dimensional laser-written waveguide arrays in silica glass with self-focusing nonlinearity [Opt. Lett. 33, 663 (2008)]. We reveal the conditions for the existence of linear and nonlinear surface states substantially influenced by the lattice topology, and study the effect of the different symmetries and couplings on the stability of two-dimensional interface solitons.This work was supported by Fondecyt grant 1080374 and by the Australian Research Council.3 pages© 2008 Optical Society of Americalightsquarehexagonalphotoniclatticessolitons2008-12-0110.1364/OL.33.0027612016-06-14