Tunable plasmonic metasurface for perfect absorption

被引：25

作者：

Huidobro, Paloma Arroyo ^{[1
]}

Maier, Stefan A. ^{[1
]}

Pendry, John B. ^{[1
]}

机构：

[1] Imperial College London, Department of Physics, Blackett Laboratory, London,SW7 2AZ, Canada

来源：

EPJ Applied Metamaterials | 2017年 / 4卷

基金：

英国工程与自然科学研究理事会; 欧盟地平线“2020”;

关键词：

Surface plasmons - Plasmonics - Terahertz waves;

D O I：

10.1051/epjam/2017001

中图分类号：

学科分类号：

摘要：

Tunable metasurfaces, whose functionality can be dynamically modified, open up the possibility of ultra-compact photonic components with reconfigurable applications. Here we consider a graphene monolayer subject to a spatially periodic gate bias, which, thank to surface plasmons in the graphene, acts as a tunable and extremely compact metasurface for terahertz radiation. After characterizing its functionality, we show that it serves as the basic building block of an ultrathin complete absorber. In this subwavelength-thickness device, transmission and reflection channels are blocked and electromagnetic energy is completely absorbed by the metasurface building blocks. The proposed structure can be used as a modulator, and its frequency of operation can be changed by scaling its size or adjusting the doping level. © P.A. Huidobro et al., Published by EDP Sciences, 2017.

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