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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

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Published on: December 27, 2012

Wide-incident-angle, polarization-independent broadband-absorption metastructure without external resistive elements

Thanh Son Pham^1,2,3, Haiyu Zheng^1,2, Liangyao Chen⁴

¹Department of Physics and Quantum Photonic Science Research Center, Hanyang University, Seoul, 04763, Korea.

Scientific Reports

|May 3, 2024

Summary

This study introduces a novel metasurface absorber fabricated using standard printed-circuit-board techniques. The metasurface achieves over 90% broadband absorption, demonstrating polarization insensitivity and wide-angle performance for electromagnetic waves.

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Area of Science:

Electromagnetics
Materials Science
Metamaterials

Background:

Broadband electromagnetic wave absorption with polarization and incidence-angle independence is crucial for modern technologies.
Existing metamaterial absorbers often involve complex structures, specialized materials, or external resistive components.

Purpose of the Study:

To present a simple, effective metasurface structure for high broadband electromagnetic wave absorption.
To demonstrate polarization insensitivity and wide-angle performance of the proposed metasurface.

Main Methods:

Fabrication of a metasurface using standard printed-circuit-board techniques.
Design of unit cells with 4 symmetric substructures and a metallic bar pattern for planar resistive interaction.
Analysis, simulation, and experimental measurement of absorption performance.

Main Results:

Achieved absorption above 90% in a broadband frequency range (12.35–14.65 GHz).
Demonstrated polarization insensitivity and maintained high absorption (>90%) up to 45° incident angles.
The metasurface utilizes a planar resistive interaction without requiring actual resistive components.

Conclusions:

The proposed metasurface offers a simple and effective solution for broadband electromagnetic wave absorption.
The design principles are fundamental and adaptable for absorbers at various frequencies.
Further improvements in design and fabrication can enhance absorption performance.