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Dark-bright gap solitons in coupled-mode one-dimensional saturable waveguide arrays
Physical Review A (2011)
  • Rong Dong
  • Christian E. Ruter
  • Detlef Kip
  • Jesus Cuevas
  • Panos Kevrekidis, UMASS, Amherst
  • Daohong Song
  • Jingjun Xu
Abstract
In the present work, we consider the dynamics of dark solitons as one mode of a defocusing photorefractive lattice coupled with bright solitons as a second mode of the lattice. Our investigation is motivated by an experiment that illustrates that such coupled states can exist with both components in the first gap of the linear band spectrum. This finding is further extended by the examination of different possibilities from a theoretical perspective, such as symbiotic ones where the bright component is supported by states of the dark component in the first or second gap, or nonsymbiotic ones where the bright soliton is also a first-gap state coupled to a first or second gap state of the dark component. While the obtained states are generally unstable, these instabilities typically bear fairly small growth rates, which enable their observation for experimentally relevant propagation distances.
Disciplines
Publication Date
June 15, 2011
Publisher Statement
DOI: 10.1103/PhysRevA.83.063816
Citation Information
Rong Dong, Christian E. Ruter, Detlef Kip, Jesus Cuevas, et al.. "Dark-bright gap solitons in coupled-mode one-dimensional saturable waveguide arrays" Physical Review A Vol. 83 Iss. 6 (2011)
Available at: http://works.bepress.com/panos_kevrekidis/231/