We analyze localization of light at the interfaces separating square and hexagonal photonic lattices, as recently realized experimentally for two-dimensional laser-written waveguides in silica glass with self-focusing nonlinearity [ Opt. Lett. 33, 663 (2008) ]. We find the conditions for the existence of linear and nonlinear surface states substantially influenced by the lattice topology, and study the effect of different symmetries and couplings on the stability of two-dimensional interface solitons.
© 2008 Optical Society of America
Original Manuscript: August 7, 2008
Revised Manuscript: October 6, 2008
Manuscript Accepted: October 12, 2008
Published: November 19, 2008
Mario I. Molina and Yuri S. Kivshar, "Interface solitons in two-dimensional photonic lattices," Opt. Lett. 33, 2761-2763 (2008)