Miniaturized meandered ring graphene-metal metasurface with wide angle control on the transmitted wave

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Aeu-International Journal of Electronics and Communications Pub Date : 2024-10-20 DOI:10.1016/j.aeue.2024.155566

Maryam Mokhayer , Saughar Jarchi , Reza Faraji-Dana

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Abstract

In this paper, a miniaturized transmissive metasurface using graphene-metal in the 3.5 THz frequency range is proposed and designed to control the wavefront of the transmitted wave. The designed unit cell has four identical ultra-thin layers. Each layer contains a meandered ring-shaped slot carved in a metal sheet, which is partially filled with four graphene patches in symmetrical places. By employing the meandered shape slots, the lateral dimensions of the unit cells are reduced to 0.19 of the free space wavelength, which, to the best of our knowledge, is the most miniaturized designed structure among the existing transmissive metasurfaces in the literature. Full wave simulations confirmed that without any physical changes and by just altering the spatial distribution of the chemical potential of the graphene patches, wave-front control is achieved. The achievements include beam steering and beam splitting with numerous discrete angles up to 63° and beam focusing with optional focal lengths. It is envisaged that besides 6G wireless telecommunications, this structure could also be beneficial for THz imaging, nano-photonic and opto-electronic devices.

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可对透射波进行广角控制的微型蜿蜒环形石墨烯-金属元表面

本文提出并设计了一种在 3.5 太赫兹频率范围内使用石墨烯-金属的小型化透射元表面，用于控制透射波的波前。所设计的单元单元有四个相同的超薄层。每一层都包含一个在金属片上雕刻的蜿蜒环形槽，槽内对称地填充了四个石墨烯贴片。据我们所知，这是现有文献中透射型元表面中最微型化的设计结构。全波模拟证实，无需任何物理变化，只需改变石墨烯贴片化学势的空间分布，就能实现波前控制。所取得的成果包括光束转向、多角度分束（最大可达 63°）以及可选焦距的光束聚焦。据设想，除了 6G 无线通信外，这种结构还可用于太赫兹成像、纳米光子和光电设备。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.