Impact of inherent periodic structure on effective medium description of left-handed and related metamaterials
Impact of inherent periodic structure on effective medium description of left-handed and related metamaterials
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DOI：
10.1103/physrevb.71.245105
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发表时间：
2005-06-01
影响因子：
3.7
通讯作者：
Soukoulis, CM
中科院分区：
文献类型：
--
作者：
Koschny, T;Markos, P;Soukoulis, CM
我们研究了开口环谐振器和金属丝类型的左手和相关超材料的有效电磁参数的频率依赖性。我们发现，这些超材料固有的减少平移对称性（周期性结构）影响其有效的电磁响应。为了预测这种周期性，我们制定了一个周期性的有效介质模型，使我们能够区分电磁参数的谐振行为的结构的周期性的影响。我们使用这个模型的分析数值数据的周期性阵列的分裂环谐振器，薄金属线，切割线，以及左手结构的传输和反射。本方法使我们能够识别的起源先前观察到的共振-反共振耦合以及发生的负虚部的有效磁导率和磁导率的这些材料。我们的分析表明，该结构的周期性可以忽略不计，只有当电磁波的波长大于30个空间周期的研究结构。
We study the frequency dependence of the effective electromagnetic parameters of left-handed and related metamaterials of the split ring resonator and wire type. We show that the reduced translational symmetry (periodic structure) inherent to these metamaterials influences their effective electromagnetic response. To anticipate this periodicity, we formulate a periodic effective medium model which enables us to distinguish the resonant behavior of electromagnetic parameters from effects of the periodicity of the structure. We use this model for the analysis of numerical data for the transmission and reflection of periodic arrays of split ring resonators, thin metallic wires, cut wires, as well as the left-handed structures. The present method enables us to identify the origin of the previously observed resonance-antiresonance coupling as well as the occurrence of negative imaginary parts in the effective permittivities and permeabilities of those materials. Our analysis shows that the periodicity of the structure can be neglected only for the wavelength of the electromagnetic wave larger than 30 space periods of the investigated structure.