Negative-index metamaterial with polymer-embedded wire-pair structures at terahertz frequencies.
Negative-index metamaterial with polymer-embedded wire-pair structures at terahertz frequencies.
复制标题
太赫兹频率下具有聚合物嵌入线对结构的负折射率超材料。
DOI：
10.1364/ol.33.002683
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发表时间：
2008
期刊：
影响因子：
3.6
通讯作者：
H. Kurz
中科院分区：
文献类型：
--
作者：
Mohammad Awad;M. Nagel;H. Kurz
负折射率超材料的实验演示仅限于微波和红外频率。在这项工作中，制造并表征了一种在太赫兹频率下表现出强负折射率的独立式多层薄膜超材料。这种超材料由周期性排列的 H 形线对谐振结构组成，该结构被 14.5 微米厚的层隔开，并封装在两层 26 微米厚的苯并环丁烯聚合物层之间。通过太赫兹时域光谱测量超材料的复杂反射和透射参数，并用于提取折射材料特性。我们的结果与有限元现场模拟非常吻合。
Experimental demonstrations of metamaterials with negative index of refraction have been limited to microwave and IR frequencies. In this work, a freestanding multilayer thin-film metamaterial showing a strong negative index of refraction at terahertz frequencies is fabricated and characterized. The metamaterial consists of periodically arranged H-shaped wire-pair resonant structures separated by a 14.5-microm-thick and enclosed between two 26-microm-thick layers of benzocyclobutene polymer. Complex reflection and transmission parameters of the metamaterial are measured via terahertz time-domain spectroscopy and are used for the extraction of refractive material properties. Our results show good agreement with finite element field simulations.