We report on the experimental observation of two-dimensional solitons at the interface between square and hexagonal waveguide arrays. In addition to the different symmetries of the lattices, the influence of a varying refractive index modulation depth is investigated. Such variation strongly affects the properties of surface solitons residing at different sides of the interface.
© 2008 Optical Society of America
Original Manuscript: January 4, 2008
Revised Manuscript: February 15, 2008
Manuscript Accepted: February 18, 2008
Published: March 24, 2008
A. Szameit, Y. V. Kartashov, F. Dreisow, M. Heinrich, V. A. Vysloukh, T. Pertsch, S. Nolte, A. Tünnermann, F. Lederer, and L. Torner, "Observation of two-dimensional lattice interface solitons," Opt. Lett. 33, 663-665 (2008)