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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Metasurface-based multifunctional composites with ultra-robust broadband microwave absorption up to 1000 °C.
Xinyuan Lv1, Qiujin Gu1, Shengchi Zhu2
1Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha, P.R. China.
Nature Communications
|November 25, 2025
Summary
This study introduces a novel Ruthenium Dioxide/glass material for robust microwave absorption (MA) metasurfaces. These materials maintain stable MA performance even at extreme temperatures up to 1000°C.
Area of Science:
- Materials Science
- Electromagnetics
- Nanotechnology
Background:
- Metamaterials offer vast potential for ultra-broadband microwave absorption (MA).
- A significant challenge is maintaining stable MA performance in extreme high-temperature environments.
- Developing materials that are stable across wide temperature ranges is crucial for advanced applications.
Purpose of the Study:
- To develop a microwave-absorbing metasurface with stable performance under extreme temperatures.
- To investigate the use of Ruthenium Dioxide/glass as a resistive material for temperature-insensitive electrical properties.
- To create multifunctional composites integrating microwave absorption, thermal insulation, and load-bearing capabilities.
Main Methods:
- Fabrication of microwave-absorbing metasurfaces using Ruthenium Dioxide/glass resistive material.
- Utilizing a tunneling effect in Ruthenium Dioxide/glass to achieve a low temperature coefficient of resistance.
- Incorporating low-dielectric alumina aerogel and Al2O3f/Al2O3 ceramic composites as dielectric spacer layers.
- Testing microwave absorption performance across a broad frequency range (2-12 GHz).
- Evaluating material stability against temperature variations (25-1000°C), thermal shock, incidence angle, and polarization.
Main Results:
- Ruthenium Dioxide/glass demonstrated temperature-insensitivity in electrical properties due to its low temperature coefficient of resistance.
- The multifunctional composites exhibited impressive broadband (2-12 GHz) microwave absorption.
- The materials showed ultra-robust performance against temperature variations up to 1000°C, thermal shock, incidence angle (±45°), and polarization.
- The integrated composites provided long-term thermal insulation and a high compressive modulus (6.58 MPa).
Conclusions:
- The developed Ruthenium Dioxide/glass metasurfaces offer stable broadband microwave absorption in extreme high-temperature environments.
- The multifunctional composites demonstrate significant potential for applications requiring simultaneous microwave absorption, thermal insulation, and structural integrity.
- This advancement paves the way for developing advanced materials capable of operating reliably in extreme multi-field conditions.
