超材料
介电常数
分裂环谐振器
负折射
反射(计算机编程)
传递矩阵
谐振器
物理
光学
频率依赖性
电磁辐射
凝聚态物理
量子力学
电介质
核磁共振
计算机科学
计算机视觉
程序设计语言
作者
David R. Smith,S. Schultz,Peter Markoš,Costas M. Soukoulis
出处
期刊:Physical review
日期:2002-04-19
卷期号:65 (19)
被引量:2519
标识
DOI:10.1103/physrevb.65.195104
摘要
We analyze the reflection and transmission coefficients calculated from transfer matrix simulations on finite lengths of electromagnetic metamaterials, to determine the effective permittivity (\ensuremath{\varepsilon}) and permeability (\ensuremath{\mu}). We perform this analysis on structures composed of periodic arrangements of wires, split ring resonators (SRRs), and both wires and SRRs. We find the recovered frequency-dependent \ensuremath{\varepsilon} and \ensuremath{\mu} are entirely consistent with analytic expressions predicted by effective medium arguments. Of particular relevance are that a wire medium exhibits a frequency region in which the real part of \ensuremath{\varepsilon} is negative, and SRRs produce a frequency region in which the real part of \ensuremath{\mu} is negative. In the combination structure, at frequencies where both the recovered real parts of \ensuremath{\varepsilon} and \ensuremath{\mu} are simultaneously negative, the real part of the index of refraction is also found to be unambiguously negative.
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