VO₂-Graphene Terahertz Multifunctional Metasurface with Switchable Broadband Waveplates and Absorber.

IF 4.3 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanomaterials Pub Date : 2026-04-20 DOI:10.3390/nano16080490

Hong Su, Tao Huang, Gaozhao Liu, Wentao Chen, Jiarong Zi, Chenglong Zhang, Shiping Feng, Min Zhang, Ling Li, Huawei Liang, Shixing Wang

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引用次数: 0

Abstract

A terahertz multifunctional metasurface based on vanadium dioxide (VO₂) and graphene that can switch between waveplate and absorber functionalities is proposed. As the temperature is below 300 K, by electrically controlling the Femi energy of the graphene it can realize half-wave plate (HWP) and quarter-wave plate (QWP) functionalities in the operating bandwidths of both 1.39-2.34 THz and 0.92-2.68 THz, respectively. While the temperature is above 340 K, the dipole resonance between VO₂ and a gold reflector induces absorption. Furthermore, by applying the voltage to graphene, dual-parameter modulation of the amplitude of the transverse electric (TE) waves and the resonance frequency of the transverse magnetic (TM) waves is achieved, the absorption bandwidths of which are 3.65-3.78 THz and 1.41-3.12 THz, respectively. The operating frequencies for HWP, QWP, TE and TM waves can be tuned by changing the electrical field and working temperature. In addition, the incident angles are not sensitive to the performance of the metasurface, confirming its effectiveness even under large-angle incidence. The metasurface with simplicity in design, mature fabrication processes, and comprehensive functionality, has certain promising applications in terahertz optical switches, terahertz spectroscopy systems, modulators, and communication systems.

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具有可切换宽带波板和吸收体的vo2 -石墨烯太赫兹多功能超表面

提出了一种基于二氧化钒（VO2）和石墨烯的太赫兹多功能超表面，可以在波片和吸收器功能之间切换。当温度低于300 K时，通过控制石墨烯的Femi能量，可以在1.39 ~ 2.34 THz和0.92 ~ 2.68 THz的工作带宽范围内实现半波片（HWP）和四分之一波片（QWP）功能。当温度高于340 K时，VO2与金反射器之间的偶极共振引起吸收。此外，通过对石墨烯施加电压，实现了横向电（TE）波振幅和横向磁（TM）波共振频率的双参数调制，其吸收带宽分别为3.65 ~ 3.78 THz和1.41 ~ 3.12 THz。通过改变电场和工作温度，可以调节HWP、QWP、TE和TM波的工作频率。此外，入射角对超表面的性能不敏感，即使在大入射角下也有效。该超表面具有设计简单、制造工艺成熟、功能全面等特点，在太赫兹光开关、太赫兹光谱学系统、调制器和通信系统等方面具有一定的应用前景。

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

Nanomaterials NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.50

自引率

9.40%

发文量

3841

审稿时长

14.22 days

期刊介绍： Nanomaterials (ISSN 2076-4991) is an international and interdisciplinary scholarly open access journal. It publishes reviews, regular research papers, communications, and short notes that are relevant to any field of study that involves nanomaterials, with respect to their science and application. Thus, theoretical and experimental articles will be accepted, along with articles that deal with the synthesis and use of nanomaterials. Articles that synthesize information from multiple fields, and which place discoveries within a broader context, will be preferred. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental or methodical details, or both, must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Nanomaterials is dedicated to a high scientific standard. All manuscripts undergo a rigorous reviewing process and decisions are based on the recommendations of independent reviewers.