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TUNABLE REFRACTIVE INDEX SENSOR MADE USING GRAPHENE WITH A HIGH FIGURE OF MERIT
Abstract
Plasmonic effects can be used in high sensitivity sensors, which have attracted widespread attention. However, most of the previously reported refractive index sensors can no longer be adjusted once fabricated, and their figure of merit (FOM) is undesirable. Concerning this, we propose a refractive index sensor consisting of a graphene waveguide and a graphene elliptical cavity working in the mid-infrared range. Its performance can be adjusted in real time by applying a bias voltage to the graphene patterns. The sensitivity of the proposed sensor can reach 2850/refractive index unit and FOM up to 633, respectively. Owing to its excellent sensing properties of high sensitivity and high FOM, the proposed sensor can be applied in gas sensing.
Supporting agencies: This work was supported by the 2021 Zhejiang Provincial Natural Science Foundation under Grant No. LY21F010012, in part by the 2018 Zhejiang Provincial Natural Science Foundation under Grant No. Y18E070005 and in part by the Zhejiang Science and Technology Department Public Welfare Project under Grant No. GH18F010001.
About the Authors
Z. Wang
Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering at China Jiliang University
China
China
Zhen Wang
Hangzhou
X. Li
Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering at China Jiliang University
China
China
Xia Li
Hangzhou
H. Lin
Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering at China Jiliang University
China
China
Hongya Lin
Hangzhou
D. Yang
Tourism College of Zhejiang
China
China
Dongxu Yang
Hangzhou
Y. Wang
Tourism College of Zhejiang
China
China
Yinqiu Wang
Hangzhou
S. Lu
Zhejiang University of Water Resources and Electric Power
China
China
Saiqun Lu
Hangzhou
B. Xiao
Key Laboratory of Electromagnetic Wave Information Technology and Metrology of Zhejiang Province, College of Information Engineering at China Jiliang University
China
China
Binggang Xiao
Hangzhou
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Review
For citations:
Wang Z., Li X., Lin H., Yang D., Wang Y., Lu S., Xiao B. TUNABLE REFRACTIVE INDEX SENSOR MADE USING GRAPHENE WITH A HIGH FIGURE OF MERIT. Zhurnal Prikladnoii Spektroskopii. 2022;89(5):719-725.
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