Physics – Optics
Scientific paper
2010-11-29
Europhysics Letters 92, 64001 (2010)
Physics
Optics
13 pages, 4 figures, to appear in Europhysics Letters
Scientific paper
The subject of the work is the stabilization of two-dimensional (2D) two-component (vector) solitons, in media with the attractive cubic nonlinearity, against the collapse by a linear lattice (LL, which is induced by a periodic modulation of the refractive index in optics, or created as an optical lattice in BEC), or by a nonlinear lattice (NL, induced by a periodic modulation of the nonlinearity coefficient). We demonstrate that, due to the XPM (cross-phase-modulation) coupling between the components, the LL or NL acting on a single component is sufficient for the stabilization of vector solitons, that include a component for which the self-focusing medium is uniform. In the case of the LL, the vector solitons are stable almost in their entire existence domain, while the NL can only stabilize the solitons in which the component affected by the lattice carries the norm which is comparable to, or larger than the norm of the component in the uniform medium.
Borovkova Olga V.
Kartashov Yaroslav V.
Malomed Boris A.
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