Effective medium theory of left-handed materials
Effective medium theory of left-handed materials
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DOI：
10.1103/physrevlett.93.107402
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发表时间：
2004-09-03
影响因子：
8.6
通讯作者：
Soukoulis, CM
中科院分区：
文献类型：
--
作者：
Koschny, T;Kafesaki, M;Soukoulis, CM
我们分析了传输矩阵计算得到的传输和反射数据的有限长度的超材料，以确定其有效的介电常数ε和磁导率μ。我们的研究涉及的超材料结构组成的周期性安排的电线，切割线，开口环谐振器（SRR），封闭的SRR，和电线和SRR。我们发现，SRR有一个很强的电响应，相当于切割线，这主导了左手材料（LHM）的行为。给出了不同结构的有效参数的解析表达式，可以用来解释LHM的传输特性。特别相关的是我们的研究引入的标准，以确定实验透射峰是左手还是右手。
We analyze the transmission and reflection data obtained through transfer matrix calculations on metamaterials of finite lengths, to determine their effective permittivity epsilon and permeability mu. Our study concerns metamaterial structures composed of periodic arrangements of wires, cut wires, split ring resonators (SRRs), closed SRRs, and both wires and SRRs. We find that the SRRs have a strong electric response, equivalent to that of cut wires, which dominates the behavior of left-handed materials (LHM). Analytical expressions for the effective parameters of the different structures are given, which can be used to explain the transmission characteristics of LHMs. Of particular relevance is the criterion introduced by our studies to identify if an experimental transmission peak is left or right handed.