Liquid Crystal Tunable Metamaterial Absorber
Liquid Crystal Tunable Metamaterial Absorber
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DOI：
10.1103/physrevlett.110.177403
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发表时间：
2013-04-25
影响因子：
8.6
通讯作者：
Padilla, Willie J.
中科院分区：
文献类型：
--
作者：
Shrekenhamer, David;Chen, Wen-Chen;Padilla, Willie J.
我们提出了一个实验演示的电子可调谐超材料吸收在太赫兹政权。通过将有源液晶整合到超材料单元胞内的战略位置，我们能够在2.62太赫兹处修改30%的吸收，并将谐振吸收调谐到带宽的4%以上。数值全波模拟很好地匹配实验，并阐明了潜在的机制，即，同时调整电和磁响应，允许保留谐振吸收。这些结果表明，表面的基本光相互作用可以通过全电子手段动态控制，并为实现新的应用提供了前进的道路。DOI: 10.1103 / PhysRevLett.110.177403
We present an experimental demonstration of electronically tunable metamaterial absorbers in the terahertz regime. By incorporation of active liquid crystal into strategic locations within the metamaterial unit cell, we are able to modify the absorption by 30% at 2.62 THz, as well as tune the resonant absorption over 4% in bandwidth. Numerical full-wave simulations match well to experiments and clarify the underlying mechanism, i.e., a simultaneous tuning of both the electric and magnetic response that allows for the preservation of the resonant absorption. These results show that fundamental light interactions of surfaces can be dynamically controlled by all-electronic means and provide a path forward for realization of novel applications. DOI: 10.1103/PhysRevLett.110.177403