arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.4703physics.opticscond-mat.mtrl-sci
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非线性磁性超材料中的离散耗散局域模

Discrete dissipative localized modes in nonlinear magnetic metamaterials

Nikolay N. Rosanov, Nina V. Vysotina, Anatoly N. Shatsev, Ilya V. Shadrivov, David A. Powell, Yuri S. Kivshar

摘要:

我们分析了耗散离散局域模的存在性,稳定性和传播的一个和两个维的非线性晶格组成的弱耦合开口环谐振器(SRR)由外部电磁场激发。我们采用近场相互作用的方法来描述准静态的电和磁谐振器之间的相互作用,并证明了电耦合的至关重要性,它可以完全扭转谐振器之间的整体相互作用的符号。我们导出了有效的非线性模型,并分析了一维和二维晶格中激发的非线性局域模的性质。特别是,我们研究了非线性磁畴壁(所谓的开关波)分离两个不同状态的非线性磁化,并揭示了畴壁速度的依赖于外部磁场。然后,我们研究了二维局域模的非线性晶格的SRRs和证明,较大的域可能会经历调制不稳定性和分裂。

英文摘要:

We analyze the existence, stability, and propagation of dissipative discrete localized modes in one- and two-dimensional nonlinear lattices composed of weakly coupled split-ring resonators (SRRs) excited by an external electromagnetic field. We employ the near-field interaction approach for describing quasi-static electric and magnetic interaction between the resonators, and demonstrate the crucial importance of the electric coupling, which can completely reverse the sign of the overall interaction between the resonators. We derive the effective nonlinear model and analyze the properties of nonlinear localized modes excited in one- and two-dimensional lattices. In particular, we study nonlinear magnetic domain walls (the so-called switching waves) separating two different states of nonlinear magnetization, and reveal the bistable dependence of the domain wall velocity on the external field. Then, we study two-dimensional localized modes in nonlinear lattices of SRRs and demonstrate that larger domains may experience modulational instability and splitting.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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