Gap and dark solitons in discrete photorefractive media with intensity-resonant nonlinearity
Publication date
2009-06
Document type
Research article
Author
Organisational unit
Technische Universität Clausthal
Scopus ID
ISSN
Series or journal
Applied Physics B Lasers and optics
Periodical volume
95
Periodical issue
3
First page
525
Last page
530
Part of the university bibliography
Nein
Abstract
Light propagation in one-dimensional nonlinear waveguide arrays with self-defocusing intensity-resonant nonlinearity is investigated theoretically. We study thoroughly conditions for existence and stability of both gap and discrete dark solitons. According to the linear stability analysis both fundamental types (on-site and intersite) of gap solitons may be stable. Discrete dark solitons are unstable except in the low-power regime and, depending on system parameters, evolve into either gray solitons, breathers, or background radiation. Mobility of these solitons is analyzed by the free energy concept: gap solitons are immobile but dark solitons can be easily set in motion. © 2009 Springer-Verlag.
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