Gray solitons in parity-time symmetric potentials

被引：59
|
作者：
Li, Huagang [2 ]
Shi, Zhiwei [1 ]
Jiang, Xiujuan [1 ]
Zhu, Xing [3 ]
机构：
[1] Guangdong Univ Technol, Sch Informat Engn, Guangzhou 510006, Guangdong, Peoples R China
[2] Guangdong Univ Educ, Dept Phys, Guangzhou 510303, Guangdong, Peoples R China
[3] S China Univ Technol, Sch Sci, Guangdong Engn Res Ctr Semicond Lighting, Guangzhou 510640, Peoples R China
来源：
OPTICS LETTERS | 2011年 / 36卷 / 16期
基金：
中国国家自然科学基金;
关键词：
NONLOCAL NONLINEAR MEDIA; SPATIAL SOLITONS; DARK SOLITONS; OPTICS;
D O I：
10.1364/OL.36.003290
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We numerically study the gray solitons in parity-time (PT) symmetric potentials. Simulated results show that there are two kinds of gray solitons, the dip-shaped gray solitons and the hump-shaped solitons, and both of them can be stable. Hump-shaped solitons can always exist, but the grayness of a stable dip-shaped gray soliton should exceed a threshold value. More interesting, it is discovered that when propagating in PT symmetric potentials, the gray solitons have no transverse deviation, and this is a phenomenon different from the usual gray solitons. (C) 2011 Optical Society of America
引用
收藏
页码：3290 / 3292
页数：3
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