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Updated: Mar 19, 2026
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Electrically tunable graphene-based bifunctional terahertz metasurface for absorption and polarization conversion
Applied Optics
|March 17, 2026
Summary
This study introduces a graphene-based terahertz metasurface that acts as a bifunctional device. It can switch between broadband polarization conversion and high-performance absorption, offering tunable electromagnetic applications.
Area of Science:
- Metamaterials
- Terahertz Technology
- Graphene Applications
Background:
- Terahertz (THz) technology requires advanced functional devices.
- Metasurfaces offer novel electromagnetic wave manipulation capabilities.
- Graphene's tunable electronic properties are ideal for dynamic control.
Purpose of the Study:
- To propose an electrically tunable bifunctional terahertz metasurface.
- To achieve switching between absorption and polarization conversion (PC) functions.
- To explore applications in THz devices and electromagnetic shielding.
Main Methods:
- Design and simulation of a graphene-based metasurface.
- Analysis of surface current and electric field distributions.
- Application of impedance matching theory.
- Investigation of structural parameter and incidence angle effects.
Main Results:
- Broadband PC (>90%) from 1.45-3.15 THz at 0 eV Fermi level.
- High absorption (>90%) from 2.79-3.15 THz at 1 eV Fermi level.
- Stable performance under varying structural parameters and oblique incidence angles.
- Dynamic tunability via electrical modulation of graphene.
Conclusions:
- The proposed metasurface successfully integrates dual functions of absorption and polarization conversion.
- Electrical tuning of graphene Fermi level enables seamless switching between functions.
- Demonstrates significant potential for advanced terahertz devices and electromagnetic shielding applications.
