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MOSFET: Enhancement Mode01:22

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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
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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.)
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PubMed
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.

Keywords:
MoS2electric tuningmetamaterialpoly(ionic liquid)terahertz stealth

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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.