Tri-band terahertz polarization reconfigurable reflective metasurface based on liquid crystal

IF 3.6 2区物理与天体物理 Q2 PHYSICS, APPLIED Applied Physics Letters Pub Date : 2025-02-18 DOI:10.1063/5.0251461

Qi Xie, Bao Zhang, Shui Liu, Jingxia Qiang, Yamei Zhang, Feng Xu

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Abstract

Terahertz technology is poised to revolutionize next-generation wireless communication systems, such as 5G-A and 6G, by addressing the growing need for efficient electromagnetic wave modulation in the terahertz frequency band. In this study, we present a reflective metasurface comprising dual metal layers and a tunable liquid crystal medium, designed to achieve dynamic linear-to-circular polarization conversion. Experimental results demonstrate polarization conversion across three frequency bands: 248–254, 265–278, and 287–292 GHz. Furthermore, left-hand circular polarization (LHCP)-to-right-hand circular polarization (RHCP) switching is achieved at 248–254 and 287–292 GHz, with a stable RHCP state observed at 265–278 GHz. These findings validate the device's ability to dynamically control polarization states through applied bias voltage. By enabling precise and flexible modulation, this metasurface provides a scalable and efficient solution for reconfigurable intelligent surfaces, paving the way for advanced terahertz communication systems in future wireless networks.

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基于液晶的三波段太赫兹偏振可重构反射超表面

通过满足对太赫兹频段高效电磁波调制日益增长的需求，太赫兹技术有望彻底改变下一代无线通信系统，如5G-A和6G。在这项研究中，我们提出了一个由双金属层和可调谐液晶介质组成的反射超表面，旨在实现线性到圆的动态偏振转换。实验结果表明，极化可以在248-254、265-278和287-292 GHz三个频段上转换。此外，在248 ~ 254 GHz和287 ~ 292 GHz频段实现了左圆极化（LHCP）到右圆极化（RHCP）的切换，在265 ~ 278 GHz频段实现了稳定的RHCP状态。这些发现验证了该器件通过施加偏置电压来动态控制极化状态的能力。通过实现精确和灵活的调制，这种超表面为可重构智能表面提供了可扩展和高效的解决方案，为未来无线网络中的先进太赫兹通信系统铺平了道路。

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

Applied Physics Letters 物理-物理：应用

CiteScore

6.40

自引率

10.00%

发文量

1821

审稿时长

1.6 months

期刊介绍： Applied Physics Letters (APL) features concise, up-to-date reports on significant new findings in applied physics. Emphasizing rapid dissemination of key data and new physical insights, APL offers prompt publication of new experimental and theoretical papers reporting applications of physics phenomena to all branches of science, engineering, and modern technology. In addition to regular articles, the journal also publishes invited Fast Track, Perspectives, and in-depth Editorials which report on cutting-edge areas in applied physics. APL Perspectives are forward-looking invited letters which highlight recent developments or discoveries. Emphasis is placed on very recent developments, potentially disruptive technologies, open questions and possible solutions. They also include a mini-roadmap detailing where the community should direct efforts in order for the phenomena to be viable for application and the challenges associated with meeting that performance threshold. Perspectives are characterized by personal viewpoints and opinions of recognized experts in the field. Fast Track articles are invited original research articles that report results that are particularly novel and important or provide a significant advancement in an emerging field. Because of the urgency and scientific importance of the work, the peer review process is accelerated. If, during the review process, it becomes apparent that the paper does not meet the Fast Track criterion, it is returned to a normal track.