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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Dynamically reconfigurable graphene-vanadium dioxide metasurface with switchable polarization conversion, multiband
Hiranmay Mistri1, Abdur Rahaman Sardar2, Anumoy Ghosh3
1Dept. of ECE, Ramkrishna Mahato Government Engineering College, Purulia, Purulia-723103, West Bengal, India. hiranmaymistri@rkmgec.ac.in.
Physical Chemistry Chemical Physics : PCCP
|March 10, 2026
Summary
This study presents a reconfigurable graphene-vanadium dioxide metasurface. It offers switchable polarization conversion, broadband absorption, and radar cross-section reduction for advanced electromagnetic applications.
Area of Science:
- Metamaterials and Nanophotonics
- Terahertz (THz) Technology
- Electromagnetic Compatibility (EMC)
Background:
- Metasurfaces offer unique electromagnetic properties through engineered subwavelength structures.
- Dynamic tunability of metasurface properties is crucial for multifunctional devices.
- Vanadium dioxide (VO2) and graphene are promising materials for active control of electromagnetic waves.
Purpose of the Study:
- To demonstrate a dynamically reconfigurable, multifunctional graphene-VO2 metasurface.
- To achieve switchable polarization conversion (linear-to-circular and linear-to-linear).
- To realize wideband and narrowband absorption and radar cross-section (RCS) reduction.
Main Methods:
- Fabrication of a metasurface unit cell comprising graphene patches on a SiO2 substrate with a VO2 ground layer.
- Utilizing temperature and graphene surface potential to switch VO2 between insulating and metallic phases.
- Numerical simulations to analyze polarization conversion, absorption, and RCS reduction across terahertz frequencies.
Main Results:
- Achieved broadband linear-to-circular polarization conversion (56.69% FBW) and linear-to-linear cross-polarization conversion (63.63% FBW) by tuning graphene.
- Observed six absorption bands from 1.72 to 10.32 THz, with peak absorptivities up to 95.61% in the insulating phase.
- Demonstrated significant monostatic RCS reduction (>20 dB) and broadband bistatic RCS reduction in both VO2 phases, with good angular stability.
Conclusions:
- The graphene-VO2 metasurface provides a versatile platform for dynamic control of electromagnetic waves in the THz regime.
- The device exhibits multifunctional capabilities including switchable polarization conversion, efficient absorption, and stealth applications.
- The proposed design shows potential for advanced THz devices requiring reconfigurable electromagnetic responses.
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