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Updated: Aug 28, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
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Multi-band terahertz superabsorbers based on perforated square-patch metamaterials.

Ben-Xin Wang1, Yuanhao He1, Pengcheng Lou1

  • 1School of Science, Jiangnan University Wuxi 214122 China wangbenxin@jiangnan.edu.cn.

Nanoscale Advances
|September 22, 2022
PubMed
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This study introduces a novel terahertz superabsorber featuring a unique metallic patch design. This innovative structure achieves high multi-band absorption in the terahertz range, paving the way for advanced applications.

Area of Science:

  • Metamaterials and Nanophotonics
  • Terahertz Technology

Background:

  • Terahertz (THz) superabsorbers are crucial for applications like sensing and imaging.
  • Conventional designs often lack multi-band absorption capabilities or require complex structures.

Purpose of the Study:

  • To design and demonstrate a novel multi-band terahertz superabsorber.
  • To investigate the role of structural modifications in achieving tunable multi-band absorption.

Main Methods:

  • Fabrication of a metallic square patch with a precisely engineered small rectangular hole.
  • Numerical simulations and analysis of near-field distributions and absorption spectra.
  • Experimental characterization of the superabsorber's performance in the terahertz range.

Main Results:

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  • Achieved >95% absorption across three distinct resonant bands in the terahertz spectrum.
  • Demonstrated that the rectangular hole introduces new resonance modes for multi-band absorption.
  • Showcased tunability to dual- or quad-band absorption by altering the hole's parameters.

Conclusions:

  • The proposed terahertz superabsorber design enables efficient multi-band absorption.
  • The engineered rectangular hole is key to controlling near-field interactions and achieving desired absorption characteristics.
  • This work offers a promising platform for advanced terahertz devices and applications.