Solitons in PT-symmetric optical lattices with spatially periodic modulation of nonlinearity

被引：62
|
作者：
He, Yingji [1 ]
Zhu, Xing [2 ]
Mihalache, Dumitru [3 ,4 ]
Liu, Jinglin [1 ]
Chen, Zhanxu [1 ]
机构：
[1] Guangdong Polytech Normal Univ, Sch Elect & Informat, Guangzhou 510665, Guangdong, Peoples R China
[2] Sun Yat Sen Univ, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China
[3] Horia Hulubei Natl Inst Phys & Nucl Engn, Magurele 077125, Romania
[4] Acad Romanian Scientists, Bucharest 050094, Romania
来源：
OPTICS COMMUNICATIONS | 2012年 / 285卷 / 15期
基金：
中国国家自然科学基金;
关键词：
Spatial solitons; PT-symmetric lattice potential; Spatial modulation of the nonlinearity; GINZBURG-LANDAU MODELS; ITERATION METHODS; SOLITARY WAVES; GAP SOLITONS; POTENTIALS; STABILITY; REAL; SPECTRA;
D O I：
10.1016/j.optcom.2012.04.006
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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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页码：3320 / 3324
页数：5
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