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Updated: Aug 17, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

A high-performance terahertz absorber based on synthetic-patterned vanadium dioxide metamaterials.

Xiaoju Xue¹, Dandan Chen¹, Xiaogang Wang¹

¹School of Science, Zhejiang University of Science and Technology, Hangzhou, China. xubijun@zust.edu.cn.

Physical Chemistry Chemical Physics : PCCP

|December 12, 2022

Summary

This study presents a novel vanadium dioxide (VO2) terahertz absorber with tunable, ultra-broadband absorption. The device demonstrates dynamic control over absorbance, offering significant advantages for various applications.

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Last Updated: Aug 17, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers

Published on: December 27, 2012

Atomic Layer Deposition of Vanadium Dioxide and a Temperature-dependent Optical Model

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Published on: May 23, 2018

Fabrication of High Contrast Gratings for the Spectrum Splitting Dispersive Element in a Concentrated Photovoltaic System

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Published on: July 18, 2015

Area of Science:

Optics and Photonics
Materials Science

Background:

Terahertz (THz) absorbers are crucial for applications like sensing and communication.
Developing absorbers with tunable and broadband characteristics remains a significant challenge.

Purpose of the Study:

To design and investigate a novel terahertz absorber utilizing vanadium dioxide (VO2) with tunable and ultra-broadband absorption properties.
To explore the potential of VO2's phase transition for dynamic control of terahertz absorption.

Main Methods:

A multi-layered absorber structure was designed, incorporating synthetic VO2 patterns, a dielectric layer, and a metal reflector.
The absorber's performance was analyzed using wave interference theory, impedance matching theory, and electric field analysis.
The tunable absorption was achieved by modulating the conductivity of VO2 through its phase transition.

Main Results:

The absorber exhibits near-total reflection in the insulating state of VO2.
In the metallic state, the absorber achieves over 90% absorptance across a 7.7 THz bandwidth (5.36-13.06 THz).
Absorbance is dynamically tunable from 4.31% to 100% by adjusting VO2 conductivity.

Conclusions:

The designed VO2-based terahertz absorber offers significant improvements in absorption bandwidth and tunability.
The absorber's simple structure, polarization insensitivity, and flexible incident angle make it highly practical.
This tunable ultra-broadband terahertz absorber shows promise for photochemical energy absorption, thermal emitters, and stealth devices.