Dual-frequency/broadband switchable and dynamically tunable metamaterial terahertz absorber based on graphene and VO2

IF 2.4 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Solid State Communications Pub Date : 2025-07-30 DOI:10.1016/j.ssc.2025.116087

Yonglin Zhu , Zhen Cui , Shuang Zhang , Lu Wang

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引用次数: 0

Abstract

This study presents a tunable terahertz (THz) metamaterial absorber capable of dual-frequency and broadband absorption modes. The device consists of a gold substrate, a Topas dielectric layer, and a resonant layer featuring a graphene hollow cross and a VO₂ cross. In the insulating state of VO₂ with graphene's chemical potential at 0.7 eV, the absorber achieves near-perfect dual-frequency absorptivity (99.4 % at 0.807 THz and 98.6 % at 2.166 THz). When VO₂ transitions to its metallic phase and graphene's chemical potential is adjusted to 0.4 eV, it exhibits broadband absorption, maintaining over 90 % efficiency across a 0.879 THz bandwidth (0.993–1.872 THz). The absorber is polarization-insensitive and dynamically tunable, with consistent performance at incident angles from 0° to 60°. A detailed analysis of the absorption mechanism and structural parameters is provided, highlighting its potential for advancing multifunctional terahertz absorbers, detectors, and sensor technologies.

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基于石墨烯和VO2的双频/宽带可切换和动态可调谐超材料太赫兹吸收体

本研究提出了一种可调谐太赫兹（THz）超材料吸收器，具有双频和宽带吸收模式。该器件由金衬底、Topas介电层和具有石墨烯空心交叉和VO2交叉的谐振层组成。在石墨烯化学势为0.7 eV的VO2绝缘状态下，吸收体实现了近乎完美的双频吸收率（0.807 THz为99.4%，2.166 THz为98.6%）。当VO2转变为金属相时，石墨烯的化学势调整到0.4 eV，它表现出宽带吸收，在0.879太赫兹（0.993-1.872太赫兹）的带宽内保持90%以上的效率。吸收器对偏振不敏感，动态可调，在0°至60°的入射角范围内具有一致的性能。详细分析了吸收机理和结构参数，强调了其在推进多功能太赫兹吸收器、探测器和传感器技术方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solid State Communications 物理-物理：凝聚态物理

CiteScore

3.40

自引率

4.80%

发文量

287

审稿时长

51 days

期刊介绍： Solid State Communications is an international medium for the publication of short communications and original research articles on significant developments in condensed matter science, giving scientists immediate access to important, recently completed work. The journal publishes original experimental and theoretical research on the physical and chemical properties of solids and other condensed systems and also on their preparation. The submission of manuscripts reporting research on the basic physics of materials science and devices, as well as of state-of-the-art microstructures and nanostructures, is encouraged. A coherent quantitative treatment emphasizing new physics is expected rather than a simple accumulation of experimental data. Consistent with these aims, the short communications should be kept concise and short, usually not longer than six printed pages. The number of figures and tables should also be kept to a minimum. Solid State Communications now also welcomes original research articles without length restrictions. The Fast-Track section of Solid State Communications is the venue for very rapid publication of short communications on significant developments in condensed matter science. The goal is to offer the broad condensed matter community quick and immediate access to publish recently completed papers in research areas that are rapidly evolving and in which there are developments with great potential impact.