Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

Zao Yi; Cuiping Liang; Xifang Chen; Zigang Zhou; Yongjian Tang; Xin Ye; Yougen Yi; Junqiao Wang; Pinghui Wu

doi:10.3390/mi10070443

Micromachines (Jul 2019)

Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

Zao Yi,
Cuiping Liang,
Xifang Chen,
Zigang Zhou,
Yongjian Tang,
Xin Ye,
Yougen Yi,
Junqiao Wang,
Pinghui Wu

Affiliations

Zao Yi: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
Cuiping Liang: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
Xifang Chen: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
Zigang Zhou: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
Yongjian Tang: Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China
Xin Ye: Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621010, China
Yougen Yi: College of Physics and Electronics, Central South University, Changsha 410083, China
Junqiao Wang: School of Physics and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450001, China
Pinghui Wu: Photonic Technology Research & Development Center, Key Laboratory of Information Functional Material for Fujian Higher Education, Quanzhou Normal University, Quanzhou 362000, China

DOI: https://doi.org/10.3390/mi10070443
Journal volume & issue: Vol. 10, no. 7
p. 443

Abstract

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We demonstrate a dual-band plasmonic perfect absorber (PA) based on graphene metamaterials. Two absorption peaks (22.5 μm and 74.5 μm) with the maximal absorption of 99.4% and 99.9% have been achieved, respectively. We utilize this perfect absorber as a plasmonic sensor for refractive index (RI) sensing. It has the figure of merit (FOM) of 10.8 and 3.2, and sensitivities of about 5.6 and 17.2 μm/RIU, respectively. Hence, the designed dual-band PA-based RI sensor exhibits good sensing performance in the infrared regime, which offers great potential applications in various biomedical, tunable spectral detecting, environmental monitoring and medical diagnostics.

Published in Micromachines

ISSN: 2072-666X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.mdpi.com/journal/micromachines

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