Transition between positive and negative permittivity in field-dependent metamaterial

Transition between positive and negative permittivity in field-dependent metamaterial
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场相关超材料中正介电常数和负介电常数之间的转变

DOI:
10.1063/1.3574921
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发表时间:
2011
影响因子:
3.2
通讯作者:
O. Sakai
O. Sakai
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
O. Sakai

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超材料中的介电常数依赖于传播的电磁波的电场,会引起对电磁波的反常响应。当我们将放电等离子体看作具有场相关介电常数和负磁导率的超材料的例子时,正、负介电常数之间发生转变,导致波在低场分支中反射,而在高场分支中通过产生负折射率介质来传输。在介电常数和电场的相空间中的非线性触发了这种动态转变,这在数值结果中被提出,并在一个分析模型中被阐明。
Permittivity in a metamaterial, which depends on the electric field of a propagating electromagnetic wave, induces anomalous responses against electromagnetic waves. When we consider discharge plasma an example of a metamaterial with field-dependent permittivity and negative permeability, a transition takes place between positive and negative permittivity, leading to reflection of waves in a low-field branch and transmission by the creation of a negative-refractive-index medium in a high-field branch. Nonlinearity in the phase space of the permittivity and the electric field in this system trigger this dynamic transition, which is suggested in the numerical results and clarified in an analytical model.
DOI: 10.1007/978-3-642-61247-3
发表时间: 1991-10
期刊: --
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