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Plasmonics

, Volume 13, Issue 3, pp 1043–1048 | Cite as

Tunable Nearly Perfect Absorber Based on Graphene Metamaterials at the Mid-Infrared Region

  • Li-Ping Sun
  • Xiang Zhai
  • Qi Lin
  • Gui-Dong Liu
  • Ling-Ling Wang
Article
  • 401 Downloads

Abstract

We propose the idea of a tunable nearly perfect absorber based on graphene metamaterial consisting of a periodically arranged graphene ribbons (bright mode) and the inverse slots in the thin graphene film (dark mode). The absorption peak has a narrow linewidth of 160 nm and the absorbance approaching to 97.12%. The fascinating absorption feature not merely due to plasmonically induced absorption arising from destructive interference between the bright and dark mode but also the metamaterial absorption. We have testified numerically that the electric fields are highly confined inside the slot. The mid-IR absorption spectrum can be dynamically tuned by a small change in the chemical potential of graphene, in addition to varying geometrical parameters. Our paper considers a situation that represents an intermediate plasmonic coupling regime, between near-field and far-field coupling. Such absorber possesses potential for applications in mid-IR nanophotonic devices.

Keywords

Perfect absorber Field enhancement Graphene metamaterial Surface plasmon polaritons Mid-infrared 

Notes

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 61505052, 11074069, 61176116).

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Copyright information

© Springer Science+Business Media New York 2017

Authors and Affiliations

  • Li-Ping Sun
    • 1
  • Xiang Zhai
    • 1
  • Qi Lin
    • 1
  • Gui-Dong Liu
    • 1
  • Ling-Ling Wang
    • 1
  1. 1.School of physics and Microelectronic and Key Laboratory for Micro-Nano Physics and Technology of Hunan ProvinceHunan UniversityChangshaChina

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