Gaussian-type light bullets in power-law nonlinear media with PT - symmetric potentials

被引：4
|
作者：
Chen, Yi-Xiang [1 ]
Dai, Chao-Qing [2 ,3 ]
机构：
[1] Zhejiang Univ Media & Commun, Hangzhou 310018, Zhejiang, Peoples R China
[2] Zhejiang A&F Univ, Sch Sci, Linan 311300, Zhejiang, Peoples R China
[3] Zhejiang A&F Univ, Zhejiang Prov Key Lab Chem Utilizat Forestry Biom, Linan 311300, Zhejiang, Peoples R China
来源：
OPTICS COMMUNICATIONS | 2015年 / 338卷
基金：
中国国家自然科学基金;
关键词：
Nonlinear Schrodinger equation; Parity-time symmetric potential; Power-law nonlinearity; Gaussian-type light bullet; SCHRODINGER-EQUATION; SOLITONS;
D O I：
10.1016/j.optcom.2014.11.006
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The (3+1)-dimensional nonlinear Schrodinger equation with power-law nonlinearities in two kinds of PT - symmetric potentials is investigated, and two kinds of Gaussian-type light bullet (LB) solutions are analytically derived. Based on these analytical solutions, the powers, power-flow densities and the phase switches are discussed. The linear stability analysis and the direct numerical simulation show that LB solutions are stable only when the imaginary parts of PT - symmetric potentials are below some thresholds in the focusing power-law nonlinear media, while they are always unstable in the defocusing power-law nonlinear media. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：393 / 398
页数：6
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