Spatial k-dispersion engineering of spoof surface plasmon polaritons for customized absorption.
Spatial k-dispersion engineering of spoof surface plasmon polaritons for customized absorption.
复制标题
用于定制吸收的欺骗表面等离子体激元的空间 k 色散工程
DOI：
10.1038/srep29429
复制
发表时间：
2016-07-08
影响因子：
4.6
通讯作者：
Qu S
中科院分区：
文献类型：
--
作者：
Pang Y;Wang J;Ma H;Feng M;Li Y;Xu Z;Xia S;Qu S
电磁波在介质中的吸收通常通过控制本构参数的频散来操纵。然而，在宽频率范围内获得用于定制吸收的所需本构参数仍然具有挑战性。在这里，凭借欺骗表面等离子体激元（SPPs），我们展示了能力的spatialk色散工程生产定制的宽带吸收。等离子体阵列可以有效地将入射波转换为欺骗SPP，并且可以通过设计k矢量的空间色散来控制它们的传播和/或吸收。基于这一特点，我们展示了如何使用这样的概念来实现宽带以及频率选择性宽带选择作为例子。预计所提出的概念可以扩展到在宽频率范围内传播电磁波的其他操纵。
Absorption of electromagnetic waves in a medium is generally manipulated by controlling the frequency dispersion of constitutive parameters. However, it is still challenging to gain the desired constitutive parameters for customized absorption over a broad frequency range. Here, by virtue of spoof surface plasmonic polaritons (SPPs), we demonstrate capabilities of the spatialk-dispersion engineering for producing the customized broadband absorption. Incident waves can be efficiently converted to the spoof SPPs by plasmonic arrays and their propagation and/or absorption can be controlled by engineering the spatial dispersion ofk-vector. Based on this feature, we show how such concept is employed to achieve broadband as well as frequency-selective broadband absorptions as examples. It is expected that the proposed concept can be extended to other manipulations of propagating electromagnetic waves over a broad frequency range.