We report the observation of surface solitons in chirped semi-infinite waveguide arrays whose waveguides exhibit exponentially decreasing refractive indices. We show that the power threshold for surface wave formation decreases with an increase of the array chirp and that for sufficiently large chirp values linear surface modes are supported.
© 2008 Optical Society of America
Original Manuscript: January 29, 2008
Revised Manuscript: April 14, 2008
Manuscript Accepted: April 14, 2008
Published: May 14, 2008
A. Szameit, Y. V. Kartashov, F. Dreisow, M. Heinrich, T. Pertsch, S. Nolte, A. Tünnermann, V. A. Vysloukh, and L. Torner, "Observation of surface solitons in chirped waveguide arrays," Opt. Lett. 33, 1132-1134 (2008)