Artificial permeability and antibonding magnetic resonance in a copper-structured metamaterial with symmetry-broken ring-plate resonators
Artificial permeability and antibonding magnetic resonance in a copper-structured metamaterial with symmetry-broken ring-plate resonators
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DOI：
10.1109/ivesc.2010.5644237
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发表时间：
2010-11
期刊：
影响因子：
--
通讯作者：
Y. Wang;Z. Dong;Y. Zhai
中科院分区：
文献类型：
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作者：
Y. Wang;Z. Dong;Y. Zhai
具有磁共振特性的金属超材料由于其在实现从零频到光谱的人工磁性方面的潜在应用，在过去的几十年里引起了人们极大的兴趣。由于铜等非天然材料在微波频率下缺乏磁响应，磁性超材料通常包含谐振结构以提供人工磁导率。在谐振器方面，提出了开口环和切割线对等多种结构，以探索类似于天然磁性材料的顺磁或反磁响应的谐振磁特性。在以前的工作中，我们计算了Cu的双方形环的透射谱和有效磁导率，并观察到反键磁响应（即，每个双环晶胞的一对反平行磁偶极距）。这种反键磁共振不仅因为它的瞬态磁矩分布类似于静态反铁磁性的振荡形式，而且还因为它的Fano型共振而有趣。本文将双环简化为环板结构，通过引入非对称几何，研究了这种反键磁共振的修正人工磁导率。
Metallic metamaterials with magnetic resonance have attracted a lot of interest during the passed decades due to their potential applications on realizing artificial magnetism from zero frequency to optical spectrum. Since nonmagnetic natural materials, such as Cu, are lack of magnetic response at microwave frequencies, magnetic metamaterials usually contain a resonant structure to provide artificial permeability. As for the resonator, various structures such as split ring and cut-wire pair, were proposed to explore the resonant magnetic properties with paramagnetic or diamagnetic response in similar to natural magnetic materials. In previous work we calculated the transmission spectra and effective permeability of a double square ring of Cu and observed the antibonding magnetic response (i.e., a pair of antiparallel magnetic dipolar moments for each double-ring unit cell). Such an antibonding magnetic resonance is interesting not only for its transient magnetic moments distribution just like an oscillation version of the static antiferromagnetism, but also for its Fano-type resonance. In this paper, we simplify the double-ring to a ring-plate structure, and investigate the modified artificial permeability for this antibonding magnetic resonance by introducing asymmetric geometry.