Ultrawideband Dispersion Control of a Metamaterial Surface for Perfectly-Matched-Layer-Like Absorption
Ultrawideband Dispersion Control of a Metamaterial Surface for Perfectly-Matched-Layer-Like Absorption
复制标题
超材料表面的超宽带色散控制，实现完美匹配的层状吸收
DOI：
10.1103/physrevlett.111.187402
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发表时间：
2013-10-29
影响因子：
8.6
通讯作者：
Ran, Lixin
中科院分区：
文献类型：
--
作者：
Ye, Dexin;Wang, Zhiyu;Ran, Lixin
窄带宽是制约超材料吸波材料实际应用的一个基本问题。在这封信中，我们表明，通过故意控制的色散和耗散的超材料，超宽带完美的超材料吸收器的复值本构参数严格满足修改后的模型的完美匹配层，可以实现。在39%的前所未有的带宽中，实验观察到接近完美的功率吸收，优于99%，接近理论Rozanov极限。我们期望从这个一般概念中产生广泛的应用。
Narrow bandwidth is a fundamental issue plaguing practical applications of metamaterial absorbers. In this Letter, we show that by deliberately controlling the dispersion and dissipation of a metamaterial, an ultrawideband perfect metamaterial absorber with complex-valued constitutive parameters strictly satisfying the modified model of a perfectly matched layer, can be achieved. The nearly perfect power absorption, better than 99%, was experimentally observed in an unprecedented bandwidth of 39%, approaching the theoretical Rozanov limit. We expect a wide range of applications to emerge from this general concept.