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Related Experiment Video

Updated: Aug 22, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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A Polarization-Insensitive Broadband Terahertz Absorber Using Patterned Graphene.

Maixia Fu1,2,3, Jinyi Wang1,2,3, Shaoshuai Guo1,2,3

  • 1Key Laboratory of Grain Information Processing and Control (Henan University of Technology), Ministry of Education, Zhengzhou 450001, China.

Nanomaterials (Basel, Switzerland)
|November 11, 2022
PubMed
Summary
This summary is machine-generated.

This study presents a novel terahertz absorber using a graphene structure, achieving over 99% absorption across a broad bandwidth. This polarization-insensitive device offers tunable performance for terahertz applications.

Keywords:
absorberbroadbandgraphenepolarization insensitiveterahertz

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Area of Science:

  • Metamaterials
  • Terahertz Technology
  • Graphene Optics

Background:

  • Terahertz (THz) absorbers are crucial for various applications.
  • Existing absorbers often suffer from narrow bandwidth or polarization dependence.

Purpose of the Study:

  • To design and simulate a polarization-insensitive broadband terahertz absorber.
  • To achieve high absorption rates and wide relative bandwidth.
  • To explore active tunability of the absorber's performance.

Main Methods:

  • A sandwich structure of metal-dielectric-graphene was designed.
  • Graphene was patterned into an array of square blocks with circular apertures.
  • Simulations and theoretical analysis (impedance matching, electric-field distribution) were performed.

Main Results:

  • Absorption exceeding 99% from 0.93 to 1.65 THz.
  • Achieved 90% absorption from 0.80 to 1.87 THz, yielding a relative bandwidth of 80.2%.
  • Demonstrated active tunability by varying graphene's chemical potential, increasing absorption from 59.1% to 99%.

Conclusions:

  • The proposed absorber exhibits broadband, high absorption, polarization insensitivity, and wide incident angle tolerance.
  • The design offers potential applications in terahertz imaging, detection, and cloaking.