We show that the geometrically induced potential existing in undulated slab waveguides dramatically affects the properties of solitons. In particular, whereas solitons residing in the potential maxima do not feature power thresholds and are stable, their counterparts residing in the potential minima are unstable and may exhibit a power threshold for their existence. Additionally, the geometric potential is shown to support stable multipole solitons that cannot be supported by straight waveguides. Finally, the geometric potential results in the appearance of the effective barriers that prevent transverse soliton motion.
© 2011 Optical Society of America
Original Manuscript: June 27, 2011
Manuscript Accepted: August 7, 2011
Published: August 31, 2011
Yaroslav V. Kartashov, Alexander Szameit, Robert Keil, Victor A. Vysloukh, and Lluis Torner, "Solitons in geometric potentials," Opt. Lett. 36, 3470-3472 (2011)