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Updated: Nov 3, 2025
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Switchable and Dual-Tunable Multilayered Terahertz Absorber Based on Patterned Graphene and Vanadium Dioxide.
Hongyao Liu1,2, Panpan Wang1, Jiali Wu1
1State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Micromachines
|June 2, 2021
Summary
This study presents a switchable terahertz absorber using graphene and vanadium dioxide. The device offers tunable absorption across broad and dual bands, demonstrating potential for advanced terahertz applications.
Area of Science:
- Optics and Photonics
- Materials Science
- Condensed Matter Physics
Background:
- Terahertz (THz) technology requires efficient and tunable absorption devices.
- Graphene and vanadium dioxide (VO2) are promising materials for dynamic control of electromagnetic waves.
Purpose of the Study:
- To propose and analyze a switchable and dual-tunable THz absorber.
- To investigate the tunability of absorption by controlling graphene's Fermi level and VO2's phase transition.
- To evaluate the device's performance under different conditions, including polarization and incidence angle.
Main Methods:
- Utilizing a patterned graphene and VO2 multilayered structure.
- Simulating and analyzing the absorption spectra by varying graphene's Fermi level (0-0.8 eV) and VO2's temperature (insulator/metal states).
- Investigating polarization-insensitivity and angular stability of the absorber.
Main Results:
- Switchable absorption from near-total reflection to ultra-broadband absorption (4.5-10.61 THz) by tuning graphene's Fermi level in VO2 insulator state.
- Single-band and dual-band absorption (peaks at 4.16 THz and 7.3 THz) achieved by tuning graphene's Fermi level in VO2 metal state.
- High absorption maintained for polarization-insensitive and within a 55° incidence angle.
Conclusions:
- The proposed graphene-VO2 absorber offers versatile switchable and tunable THz absorption.
- The device exhibits robust performance against polarization and incidence angle variations.
- This design holds significant promise for developing high-performance, reconfigurable THz devices.
