An ultra-broadband terahertz metamaterial coherent absorber using multilayer electric ring resonator structures based on anti-reflection coating

We propose a method for achieving THz ultra-broadband coherent absorption using the anti-reflection theory of metamaterials. The metamaterial absorber consists of a periodic array of electric ring resonators with a multilayered structure which form the desired refractive index dispersion and provide...

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Bibliographic Details
Published in:Nanoscale 2020-05, Vol.12 (17), p.9769-9775
Main Authors: Du, Chao, Zhou, Di, Guo, Huan-Huan, Pang, Yong-Qiang, Shi, Hong-Yu, Liu, Wen-Feng, Su, Jin-Zhan, Singh, Charanjeet, Trukhanov, Sergei, Trukhanov, Alex, Panina, Larissa, Xu, Zhuo
Format: Article
Language:English
Subjects:
Absorbers
Absorbers (materials)
Antireflection coatings
Bandwidths
Broadband
Computer simulation
Frequency ranges
Metamaterials
Multilayers
Refractivity
Resonance absorption
Resonators
Simulation
Stealth technology
Terahertz frequencies
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Summary:We propose a method for achieving THz ultra-broadband coherent absorption using the anti-reflection theory of metamaterials. The metamaterial absorber consists of a periodic array of electric ring resonators with a multilayered structure which form the desired refractive index dispersion and provide continuous anti-reflection over a wide frequency range. The destructive interference mechanism and resonance absorption of the absorber are determined by simulation analysis and numerical simulation. Simulation results show that the absorption bandwidth is almost 8.02 THz (absorption rate >90%) over the entire terahertz band (0.1 THz-10 THz). This design provides an effective and viable method for constructing broadband absorbers for stealth technology and the construction of enhanced transmittance devices. We propose a method for achieving THz ultra-broadband coherent absorption using the anti-reflection theory of metamaterials.
ISSN:2040-3364
2040-3372
DOI:10.1039/c9nr10668e