Lagrangian approach for dark soliton in nonlocal nonlinear media

被引：6
|
作者：
Pu, Shaozhi [1 ,2 ]
Hou, Chunfeng [1 ]
Zhan, Kaiyun [1 ]
Yuan, Chengxun [1 ]
Du, Yanwei [1 ]
机构：
[1] Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
[2] Harbin Univ Sci & Technol, Dept Opt Informat Sci & Technol, Harbin 150080, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2012年 / 285卷 / 17期
关键词：
Dark solitons; Nonlocal nonlinearity; Lagrangian approach; NEMATIC LIQUID-CRYSTALS; OPTICAL SOLITONS; SPATIAL SOLITONS; PROPAGATION; COMPRESSION; BEAMS;
D O I：
10.1016/j.optcom.2012.04.030
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We theoretically investigate the dynamics of dark solitons as well as their interaction in nonlocal media. Approximate equations describing the evolution of the beams are obtained via suitable trial functions of amplitude u and refractive index n in an averaged Lagrangian. Our results reveal that out-of-phase dark solitons can evolve into stable bound states in nonlocal materials. Moreover, it is found that the separations in the bound state monotonically increase with the degree of nonlocality in nonlocal limit. These results are in excellent agreement with the numerical simulations. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：3631 / 3635
页数：5
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