Journal
OPTICS COMMUNICATIONS
Volume 285, Issue 15, Pages 3320-3324Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2012.04.006
Keywords
Spatial solitons; PT-symmetric lattice potential; Spatial modulation of the nonlinearity
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Funding
- National Natural Science Foundation of China [11174061]
- Guangdong Province Natural Science Foundation of China [S2011010005471]
- CNCS-UEFISCDI [PN-II-ID-PCE-2011-3-0083]
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We study the existence and stability of solitons forming in PT-symmetric optical lattices with spatially periodic modulation of the local strength of the nonlinear media. We found that the spatial modulation of the nonlinearity significantly affects the stability of solitons in PT-symmetric optical lattices. With the decrease of the strength of nonlinear refractive index modulation, the soliton's stability domain increases, whereas with the increase of the period of nonlinear refractive index modulation, the corresponding soliton's stability range narrows. In addition, we also investigate the influence of variation of the amplitude of the linear PT-symmetric lattice potential on soliton dynamics, in the presence of spatially periodic modulation of nonlinearity. (C) 2012 Elsevier B.V. All rights reserved.
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