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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Broadband dual-anisotropic solid metamaterials.

Yong Cheng¹, Xiaoming Zhou², Gengkai Hu¹

¹Key Laboratory of Dynamics and Control of Flight Vehicle, Ministry of Education and School of Aerospace Engineering, Beijing Institute of Technology, Beijing, 100081, China.

Scientific Reports

|October 18, 2017

Summary

This summary is machine-generated.

We developed solid elastic metamaterials with dual anisotropy for controlling elastic waves. These materials offer broadband control by combining anisotropic stiffness and mass, paving the way for advanced wave manipulation technologies.

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Area of Science:

Solid-state physics
Materials science
Acoustics and wave propagation

Background:

Controlling elastic and acoustic waves is crucial for various technological applications.
Existing metamaterials often face limitations in bandwidth and tunability.
Simultaneous control over stiffness and mass properties in metamaterials remains a significant challenge.

Purpose of the Study:

To propose and investigate solid elastic metamaterials exhibiting simultaneous anisotropic stiffness and inertial mass (dual anisotropy).
To achieve weakly dispersive, broadband control of elastic waves.
To explore the potential of these metamaterials in transformation acoustics.

Main Methods:

Design of solid elastic metamaterials with dual anisotropy.
Implementation of the sliding-interface concept in fluid-solid composites for broadband anisotropic mass.
Validation using band-structure, effective-medium, and modal-field analyses.
Analysis of the reduced pentamode-inertial material model.

Main Results:

Demonstration of solid metamaterials with simultaneous anisotropic stiffness and inertial mass.
Achieved weakly dispersive behavior over a broad frequency range.
Validation of broadband anisotropic mass through the sliding-interface concept.
Identification of a connection to the pentamode-inertial material model relevant to transformation acoustics.

Conclusions:

The proposed dual-anisotropic solid metamaterials offer a novel approach for broadband elastic and acoustic wave control.
These metamaterials provide a new pathway for designing advanced acoustic devices and wave manipulation technologies.
The findings extend the applicability of transformation acoustics principles to solid elastic systems.