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Updated: May 15, 2026
13:44
Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
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Reconfigurable Integrated High-Speed Thermal Metamaterial Pixel Arrays
Yibai Zhong1, Xiu Liu1, Zexiao Wang1
1Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States.
Nano Letters
|August 7, 2025
Summary
Researchers developed a reconfigurable thermal metamaterial pixel array using graphene transistors. This innovation enables ultrafast control of infrared emissions for dynamic thermal signatures, demonstrated by displaying alphabet letters.
Area of Science:
- Metamaterials and Nanophotonics
- Infrared Spectroscopy and Thermal Imaging
- Graphene Electronics
Background:
- Controlling thermal signatures across spatial, temporal, and spectral domains is difficult due to the nature of thermal emission.
- Existing methods lack the flexibility and speed required for advanced applications.
- Ultrafast modulation of infrared emission is a key challenge in thermal management and camouflage.
Purpose of the Study:
- To demonstrate a reconfigurable ultrafast thermal metamaterial pixel array for dynamic thermal signature control.
- To integrate active metasurfaces with graphene transistors for enhanced functionality.
- To achieve unprecedented programming flexibility in spatial, temporal, and spectral domains of infrared emission.
Main Methods:
- Fabrication of a pixel array integrating active metasurfaces with dual-gate graphene transistors (Gr-FETs).
- Utilizing Gr-FETs for both broadband transparent microheating and electrical switching functionalities.
- Designing metasurfaces for multicolor, narrowband infrared emission with high modulation speeds.
Main Results:
- Achieved ultrafast modulation speed of minimum 187 kHz for infrared emission.
- Demonstrated dual functionality of Gr-FETs as microheaters and switches, enabling unified array control.
- Successfully programmed the array to display 26 alphabetical letters through progressive scanning.
Conclusions:
- The developed reconfigurable thermal metamaterial array offers unprecedented programming flexibility for thermal signatures.
- The integration of graphene transistors provides efficient and fast control over infrared emission.
- This technology paves the way for universal thermal signature control in advanced thermal-infrared applications.
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