| 非局域非线性介质中空间暗孤子的理论和实验研究 |
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| 引用本文： | 周罗红,高星辉,杨振军,陆大全,郭旗,曹伟文,胡巍.非局域非线性介质中空间暗孤子的理论和实验研究[J].物理学报,2011,60(4):44208-044208. |
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| 作者姓名： | 周罗红 高星辉 杨振军 陆大全 郭旗 曹伟文 胡巍 |
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| 作者单位： | 华南师范大学光子信息技术广东省高校重点实验室,广州 510631 |
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| 基金项目： | 国家自然科学基金(批准号: 10804033),高等学校科技创新团队项目(批准号:06CXTD005),教育部高等学校博士点专项科研基金(批准号:200805740002)资助的课题. |
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| 摘 要： | 对非局域非线性介质中的空间暗孤子进行了研究.理论上运用牛顿迭代法求解非局域非线性薛定谔方程,得到了不同传播常数下的非局域空间暗孤子的数值解,发现在任何非局域程度以及任何传播常数条件下,都存在暗孤子的解,而且孤子的束宽与非局域程度存在一定的关系.实验上,在染料溶液中观测到了空间暗孤子在非局域非线性介质中的形成.利用输入功率所引起的非线性效应强度的变化,分析了背景光波形对暗孤子的影响,数值模拟结果与实验结果相符合.
关键词：
非局域非线性
空间暗孤子
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| 关 键 词： | 非局域非线性 空间暗孤子 |
| 收稿时间： | 2010-04-30 |
Experimental and theoretical investigations of spatial dark solitons in nonlocal nonlinear medium |
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| Zhou Luo-Hong,Gao Xing-Hui,Yang Zhen-Jun,Lu Da-Quan,Guo Qi,Cao Wei-Wen,Hu Wei.Experimental and theoretical investigations of spatial dark solitons in nonlocal nonlinear medium[J].Acta Physica Sinica,2011,60(4):44208-044208. |
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| Authors: | Zhou Luo-Hong Gao Xing-Hui Yang Zhen-Jun Lu Da-Quan Guo Qi Cao Wei-Wen Hu Wei |
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| Institution: | Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China;Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China;Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China;Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China;Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China;Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China;Laboratory of Photonic Information Technology, South China Normal University, Guangzhou 510631, China |
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| Abstract: | In this paper, we investigate spatial dark solitons in nonlocal nonlinear media. Based on the nonlocal nonlinear Schrödinger equation and the diffusion equation, the numerical solutions with different propagation constants are obtained by using the Newton iterative method. And it is found that there exist dark soliton solutions .and the relation between the width of dark soliton and the degree of nonlocality for any propagation constant under arbitrary nonlocal degrees different propagation constants. In experiments, we observe the formation of the spatial dark solitons in the solution of dye. The influence of Gaussian background on dark solitons is also discussed, and the numerical results are in agreement with the experimental results. |
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| Keywords: | nonlocal nonlinearity spatial dark solitons |
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