A numerical study of a multifunctional metamaterial with efficient terahertz absorption and low infrared emission

IF 2 4区物理与天体物理 Q3 OPTICS Journal of Optics Pub Date : 2024-08-14 DOI:10.1088/2040-8986/ad6a6d

Jinjun Bai, Chunxi Liu, Ying Shi, Wei Xu, Shengjiang Chang

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Abstract

In this study, a multifunctional metamaterial is proposed to effectively absorb terahertz (THz) radiation and shield against infrared (IR) emissions. The device comprises an IR shielding layer made of ZnS and SiO₂, and a terahertz absorbing layer utilizing a ‘graphene—SiO₂—gold’ sandwich-like structure. The properties of the metamaterial are investigated using the full-vector finite element method. The results indicate that the emissivity of the device is below 0.1 in the IR atmospheric window (8–14

μm

), with absorption reaching 90% and a bandwidth of 2.42 THz in 2–6 THz. Furthermore, the device is certainly tolerant to variations in the angle of incidence. It has a simple structure and a relatively easy preparation process. These advantages make it suitable for applications in the fields of anti-radar stealth in the THz band.

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具有高效太赫兹吸收和低红外发射功能的多功能超材料的数值研究

本研究提出了一种多功能超材料，可有效吸收太赫兹（THz）辐射并屏蔽红外辐射。该装置由 ZnS 和 SiO2 制成的红外屏蔽层和利用 "石墨烯-SiO2-金 "三明治结构的太赫兹吸收层组成。采用全矢量有限元法研究了超材料的特性。结果表明，该器件在红外大气窗口（8-14 μm）的发射率低于 0.1，吸收率达到 90%，2-6 太赫兹带宽为 2.42 太赫兹。此外，该器件还能承受入射角度的变化。它结构简单，制备过程相对容易。这些优点使其适合应用于太赫兹波段的反雷达隐身领域。

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来源期刊

Journal of Optics OPTICS-

CiteScore

4.50

自引率

4.80%

发文量

237

审稿时长

1.9 months

期刊介绍： Journal of Optics publishes new experimental and theoretical research across all areas of pure and applied optics, both modern and classical. Research areas are categorised as: Nanophotonics and plasmonics Metamaterials and structured photonic materials Quantum photonics Biophotonics Light-matter interactions Nonlinear and ultrafast optics Propagation, diffraction and scattering Optical communication Integrated optics Photovoltaics and energy harvesting We discourage incremental advances, purely numerical simulations without any validation, or research without a strong optics advance, e.g. computer algorithms applied to optical and imaging processes, equipment designs or material fabrication.