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Updated: Feb 8, 2026
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Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
15.9K
A broadband tunable terahertz negative refractive index metamaterial
Fang Ling1, Zheqiang Zhong1, Renshuai Huang1
1College of Electronics and Information Engineering, Sichuan University, Chengdu, 610065, China.
Scientific Reports
|July 1, 2018
Summary
This study introduces a novel metamaterial (MM) strategy for terahertz frequencies, achieving a broad negative refractive index (NRI) band with reduced loss. Temperature control allows real-time manipulation of MM properties, enhancing device potential.
Area of Science:
- Metamaterials
- Terahertz Technology
- Optics
Background:
- Metamaterials (MMs) offer unique electromagnetic properties.
- Achieving broadband negative refractive index (NRI) with low loss and minimal bi-anisotropy remains a challenge.
Purpose of the Study:
- To propose a strategy for broadening the NRI band and reducing loss in terahertz MMs.
- To demonstrate real-time tunability of MM properties via temperature control.
Main Methods:
- Design and simulation of a symmetric metamaterial structure.
- Analysis of transmission, refractive index, and figure of merit across various incident angles and temperatures.
- Verification of negative refraction using the wedge method.
Main Results:
- A broadband NRI was achieved for incident angles from 0° to 26°.
- Maximum negative and double-negative refraction bands were observed at 1.66 THz (40°C) and 1.37 THz (63°C), respectively.
- Figure of merit exceeded 10 in the 2.44–2.56 THz range, with a maximum of 83.77 at 2.01 THz.
Conclusions:
- The proposed MM strategy effectively broadens the NRI band and reduces loss.
- Temperature control provides real-time tunability of terahertz metamaterial properties.
- The symmetric slab waveguide exhibits unique characteristics for potential applications.
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