Issue 57, 2016, Issue in Progress
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RSC Advances

Tunable ultrasensitive terahertz sensor based on complementary graphene metamaterials

Xunjun He,*a   Qinfei Zhang,a   Guangjun Lu,b   Guobing Ying,c   Fengmin Wua  and  Jiuxing Jiang*a  

* Corresponding authors

a School of Applied Sciences, Harbin University of Science and Technology, No. 52 Xuefu Road, Nangang District, Harbin, Heilongjiang, P. R. China
E-mail: hexunjun@hrbust.edu.cn, jiangjiuxing@hrbust.edu.cn

b Beijing Research Center, Delft University of Technology, No. A35, Qinghua East Road, Haidian District, Beijing, P. R. China

c College of Mechanics and Materials, Hohai University, Nanjing, Jiangsu 211100, P. R. China

Abstract

In this paper, we propose an ultrasensitive terahertz sensor based on the complementary graphene metamaterial composed of wire-slot and split-ring resonator slot array structure. The destructive interference between two resonators gives rise to a reflection peak enabling ultrasensitive sensing, and a sensitivity of 177.7 GHz per RIU and FOM of 59.3 can be obtained for the proposed sensor. More importantly, this sensor can not only enhance the absorption of biomolecules and sensing performance, but also dynamically tune the sensing range by shifting the Fermi energy. In addition, the influences of the lateral displacement on the sensing performance are also investigated to improve the sensitivity of the sensor. Therefore, this method opens up opportunities for efficiently sensing several organic and explosive molecules and biomolecules.

Graphical abstract: Tunable ultrasensitive terahertz sensor based on complementary graphene metamaterials

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Article information

DOI
https://doi.org/10.1039/C5RA21974D
Article type
Paper
Submitted
11 Mar 2016
Accepted
12 May 2016
First published
23 May 2016

RSC Adv., 2016,6, 52212-52218

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Tunable ultrasensitive terahertz sensor based on complementary graphene metamaterials

X. He, Q. Zhang, G. Lu, G. Ying, F. Wu and J. Jiang, RSC Adv., 2016, 6, 52212 DOI: 10.1039/C5RA21974D

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