期刊
ACS NANO
卷 12, 期 2, 页码 1006-1013出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b07951
关键词
broadband absorber; surface plasmons; singular structures; metamaterials; tunable metasurfaces; terahertz
类别
资金
- EPSRC [EP/L015579/1]
- Marie Sklodowska-Curie Fellowship within the Horizons framework
- Gordon and Betty Moore foundation
- Engineering and Physical Sciences Research Council [EP/J021199/1, EP/G031819/1, 1809039, EP/D063329/1, EP/P02520X/1, EP/L024926/1] Funding Source: researchfish
- EPSRC [EP/G031819/1, EP/D063329/1, EP/P02520X/1, EP/L024926/1, EP/J021199/1] Funding Source: UKRI
By exploiting singular spatial modulations of the graphene conductivity, we design a broadband, tunable THz absorber whose efficiency approaches the theoretical upper bound for a wide absorption band with a fractional bandwidth of 185%. Strong field enhancement is exhibited by the modes of this extended structure, which is able to excite a wealth of high-order surface plasmons, enabling deeply subwavelength focusing of incident THz radiation. Previous studies have shown that the conductivity can be modulated at GHz frequencies, which might lead to the development of efficient high-speed broadband switching by an atomically thin layer.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据