Coupled Resonance Enhanced Modulation for a Graphene-Loaded Metamaterial Absorber

A graphene-loaded metamaterial absorber is investigated in the mid-infrared region. The light-graphene interaction is greatly enhanced by virtue of the coupled resonance through a cross-shaped slot. The absorption peaks show a significant blueshift with increasing Fermi level, enabling a wide range...

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Bibliographic Details
Published in:Nanoscale research letters 2019-01, Vol.14 (1), p.32-6, Article 32
Main Authors: Xiao, Dong, Liu, Qiang, Lei, Lei, Sun, Yiling, Ouyang, Zhengbiao, Tao, Keyu
Format: Article
Language:English
Subjects:
Absorbers
Absorbers (materials)
Broadband modulation
Chemistry and Materials Science
Coupled-resonance
Graphene
Infrared radiation
Materials Science
Metamaterials
Mid-infrared absorber
Modulation
Molecular Medicine
Nano Idea
Nanochemistry
Nanoscale Science and Technology
Nanotechnology
Nanotechnology and Microengineering
Resonance
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Summary:A graphene-loaded metamaterial absorber is investigated in the mid-infrared region. The light-graphene interaction is greatly enhanced by virtue of the coupled resonance through a cross-shaped slot. The absorption peaks show a significant blueshift with increasing Fermi level, enabling a wide range of tunability for the absorber. A simple circuit model well explains and predicts this modulation behavior. Our proposal may find applications in a variety of areas such as switching, sensing, modulating, and biochemical detecting.
ISSN:1931-7573
1556-276X
DOI:10.1186/s11671-019-2852-y