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Hierarchical MoS2/Poly(ionic liquid) Metamaterials for Electrically Tunable Terahertz Stealth
Yujie Zhong1, Fuwei Sun1, Shuncong Zhong1
1Fujian Provincial Key Laboratory of Terahertz Functional Devices and Intelligent Sensing, School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, P. R. China.
Advanced Materials (Deerfield Beach, Fla.)
|June 20, 2025
Summary
This study introduces a terahertz stealth metamaterial (TSM) with an ionotronic architecture. It achieves tunable terahertz absorption by modulating electron carriers, crucial for advanced stealth applications.
Area of Science:
- Metamaterials
- Nanotechnology
- Advanced Stealth Technologies
Background:
- Active absorption modulation is vital for stealth, but current terahertz absorbers lack electrical tunability.
- Emerging terahertz detection threats necessitate dynamic wave-trapping capabilities for electronic countermeasures.
Purpose of the Study:
- To propose a terahertz stealth metamaterial (TSM) that overcomes the tradeoff between high absorption and tunability.
- To enable dynamic wave trapping for electronic countermeasure systems through electrical tuning.
Main Methods:
- Developed a TSM with a hierarchical ionotronic architecture using MoS2 assemblies and poly(ionic liquid) (PIL) microarrays.
- Established wave-electron-ion interaction pathways to control charge carrier accumulation at MoS2 interfaces.
- Utilized a template-assisted assembly strategy for fabrication.
Main Results:
- Achieved significant charge carrier accumulation (100.4%) at MoS2 interfaces, modulating plasma frequency and absorption.
- Demonstrated high specific attenuation (-275 dB mm⁻¹), frequency agility (21.4%), and phase switching (153.1°).
- The TSM operates effectively within terahertz atmospheric windows.
Conclusions:
- The proposed ionotronic TSM offers enhanced absorption tunability and multiple dissipative behaviors for advanced stealth.
- The fabrication strategy is adaptable for creating universal blocks for other frequency ranges.
