Left-handed materials composed of only S-shaped resonators
Left-handed materials composed of only S-shaped resonators
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DOI：
10.1103/physreve.70.057605
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发表时间：
2004-11-01
影响因子：
2.4
通讯作者：
Chen, KS
中科院分区：
文献类型：
--
作者：
Chen, HS;Ran, LX;Chen, KS
我们分析了一个s形包体来实现具有左手性质的超材料。到目前为止，大多数传统的内含物都是由两种不同的几何形状组成的——通常是一个分裂的环和一个棒——而本文提出的内含物仅由一个s形元件组成，在大约2.6 GHz的频段上产生重叠的负介电常数和负磁导率响应。通过采用这种几何结构，我们设法将负介电常数频段降低到负磁导率频段的水平。从而允许重叠发生。因此，该结构作为一个独立的工作，不需要使用额外的杆。理论分析、数值模拟和Snell折射实验表明，该材料在某些频率确实表现出负折射率。该包体结构简单，具有较宽的左旋频带和较低的损耗，表明该包体在实现左手超材料方面具有优势。
We analyze an S-shaped inclusion for the realization of metamaterials exhibiting left-handed properties. Unlike most of the conventional inclusions used so far that are composed of two separate geometries-typically a split ring and a rod-the inclusion proposed in this paper is made of only one S-shaped element which yields an overlapping negative permittivity and negative permeability response over a frequency band of about 2.6 GHz. By adopting this geometry, we manage to lower the negative permittivity frequency band down to the level of the negative permeability frequency band. thus allowing the overlapping to occur. Therefore, the structure works as a stand alone and does not require the use of an additional rod. A theoretical analysis is carried out to study this inclusion and numerical simulations, as well as a Snell refraction experiment, clearly show that the material indeed exhibits a negative index of refraction at some frequencies. The simple pattern of the inclusion, the wide left-handed frequency band exhibited, and the low losses measured indicate the superiority of this inclusion in the realization of left-handed metamaterials.