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Related Experiment Video

Updated: Jan 20, 2026

Visible-light Induced Reduction of Graphene Oxide Using Plasmonic Nanoparticle
07:24

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Published on: September 22, 2015

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Plasmonically induced perfect absorption in graphene/metal system.

Cheng Hu1, Qi Lin1, Xiang Zhai2

  • 1Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education and Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha, 410082, China.

Nanoscale Research Letters
|August 30, 2019
PubMed
Summary

We demonstrate a novel plasmon-induced absorption (PIA) effect using graphene and a Fabry-Perot cavity. This structure achieves ultra-high performance for optical switching and sensing applications.

Keywords:
GraphenePerfect absorptionPlasmonically induced absorption

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Area of Science:

  • Plasmonics
  • Nanophotonics
  • Materials Science

Background:

  • Plasmon-induced absorption (PIA) arises from the constructive interference of plasmonic modes.
  • Existing PIA structures face limitations in performance and tunability.

Purpose of the Study:

  • To theoretically investigate a novel PIA effect.
  • To explore its realization via constructive interference between a Fabry-Perot (F-P) resonance mode and a graphene quasi-guided mode.

Main Methods:

  • Numerical simulations were employed to analyze the proposed structure.
  • The study focused on optimizing the extinction ratio, figure of merit (FOM), and resonance frequency.

Main Results:

  • Achieved an ultra-high extinction ratio of ~99.999% and a figure of merit (FOM) of 10^6.
  • Demonstrated tunability of the PIA intensity by adjusting coupling distance.
  • Showcased resonance frequency tuning via graphene Fermi level adjustment.

Conclusions:

  • The proposed structure offers significant advantages over previous designs.
  • Potential applications include dynamic optical switching and advanced biochemical sensing.