title: Solitons in geometric potentials.
abstract: 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.
authors: ICFO-Institut de Ciencies Fotoniques, and Universitat Politecnica de Catalunya, Mediterranean Technology Park, Barcelona, Spain. Yaroslav.Kartashov@icfo.es
authors: Yaroslav V
authors: YV
authors: Kartashov
authors: Alexander
authors: A
authors: Szameit
authors: Robert
authors: R
authors: Keil
authors: Victor A
authors: VA
authors: Vysloukh
authors: Lluis
authors: L
authors: Torner