Journal
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
Volume 38, Issue -, Pages 130-139Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cnsns.2016.02.013
Keywords
Optical solitons; Parity-time symmetry; Optical lattice; Linear stability
Categories
Funding
- National Natural Science Foundation of China [61308019]
- Foundation for Distinguished Young Talents in Higher Education of Guangdong [Yq2013157]
- China Scholarship Council
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A theory is presented to study the existence and stability properties of fundamental solitons, multi-peaked gap solitons and vortex solitons in self-defocusing media with PT-symmetric superlattice. In the first gap of the superlattice potential, fundamental, dipole, and in-phase quadruple solitons can exist stably within a wide parameter region, while in-phase two-peaked solitons, out-of-phase quadruple solitons and vortex solitons are always unstable. Compared with simple-lattice solitons in similar potentials, the gap solitons in superlattice have a wider stable range than those in simple-lattice. (c) 2016 Elsevier B.V. All rights reserved.
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