基于二氧化钒的超宽带多频可切换太赫兹吸收体

IF 2.1 4区物理与天体物理 Q3 PHYSICS, CONDENSED MATTER

Solid State Communications Pub Date : 2025-02-21 DOI:10.1016/j.ssc.2025.115884

Nan Liu , Zhen Cui , Shuang Zhang , Lu Wang

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引用次数: 0

摘要

在本文中，我们提出了一种利用二氧化钒的可切换太赫兹吸收器的设计。通过温度控制来调节二氧化钒的电导率，实现了从超宽带吸收到多频吸收的转换。当二氧化钒的电导率达到2 × 105 S/m时，吸收剂的吸收带宽为5.4太赫兹，在3.9 ~ 9.3太赫兹的频率范围内，吸收率达到90%。相反，当电导率为20 S/m时，吸收剂表现出多频吸收特性，在3.94 THz、7.06 THz、7.7 THz和9.16 THz频率处显示出四个不同的吸收峰，均超过90%的吸收率。为了阐明控制这两种不同吸收模式的潜在物理机制，我们利用阻抗匹配理论并对电场能量的分布进行了分析。此外，吸收剂表现出极化不敏感，并在从0到80°的广谱入射角范围内保持有效的性能。所设计的吸收剂在太赫兹成像、传感器技术、通信和光电子工业中具有巨大的应用潜力。

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Ultra-wideband and multi-frequency switchable terahertz absorber based on vanadium dioxide

In this paper, we present the design of a switchable terahertz absorber utilizing vanadium dioxide. The switching from ultra-wideband absorption to multi-frequency absorption is achieved by adjusting the conductivity of vanadium dioxide via temperature control. Specifically, when the conductivity of vanadium dioxide reaches 2 × 10⁵ S/m, the absorber demonstrates an absorption bandwidth of 5.4 THz, attaining an absorption rate of 90 % within the frequency range of 3.9–9.3 THz. Conversely, at a conductivity level of 20 S/m, the absorber exhibits multi-frequency absorption characteristics, revealing four distinct absorption peaks, all surpassing 90 % absorption rate, located at frequencies of 3.94 THz, 7.06 THz, 7.7 THz, and 9.16 THz, respectively. To elucidate the underlying physical mechanisms governing these two distinct absorption modes, we utilize the impedance matching theory and conduct an analysis of the distribution of electric field energy. Furthermore, the absorber exhibits polarization insensitivity and maintains effective performance across a broad spectrum of incident angles, ranging from 0 to 80°. The designed absorber holds significant potential for application in terahertz imaging, sensor technology, communications, and the optoelectronic industry.

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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.