A novel structure for tunable terahertz absorber based on graphene

被引：177

作者：

Xu, Bing-zheng ^{[1
]}

Gu, Chang-qing ^{[1
]}

Li, Zhuo ^{[1
]}

Niu, Zhen-yi ^{[1
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Elect & Informat Engn, Nanjing 210016, Peoples R China

来源：

OPTICS EXPRESS | 2013年 / 21卷 / 20期

关键词：

METAMATERIALS; PLASMONICS;

D O I：

10.1364/OE.21.023803

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Graphene can be used as a platform for tunable absorbers for its tunability of conductivity. In this paper, we proposed an "uneven dielectric slab structure" for the terahertz (THz) tunable absorber based on graphene. The absorber consists of graphene-dielectric stacks and an electric conductor layer, which is easy to fabricate in the manufacturing technique. Fine tuning of the absorption resonances can be conveniently achieved by adjusting the bias voltage. Both narrowband and broadband tunable absorbers made of this structure are demonstrated without using a patterned graphene. In addition, this type of graphene-based absorber exhibits stable resonances with a wide range angles of obliquely incident electromagnetic waves. (C) 2013 Optical Society of America

引用

页码：23803 / 23811

页数：9

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