Multi-functional terahertz nano-metasurface for beam-splitting and nonlinear resonance frequency shifting

IF 3.5 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2025-01-15 DOI:10.1063/5.0252621

Jianghao Li, Jiahua Cai, Chunyan Geng, Deyin Kong, Mingxuan Zhang, Baogang Quan, Xianxun Yao, Guolin Sun, Xiaojun Wu

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引用次数: 0

Abstract

The emergence of terahertz (THz) nanoscale resonance metasurface devices represents an innovative method for modulating THz waves by utilizing the intense, high-frequency alternating electric field in THz radiation. However, compared to traditional modulation methods that employ electrical, optical, and other techniques, the potential of these devices still necessitates further exploration. In this work, we achieved THz beam-splitting and field-induced nonlinear frequency shifting functions within a single THz nano-metasurface device. The device consists of single split-ring resonators (s-SRRs) with a nanogap on GaAs substrate. The pattern design based on the Pancharatnam–Berry (P-B) phase principle can split the incident wave into three beams. Meanwhile, its frequency shifting capability, which varies with the E-field, has been thoroughly investigated. The device performance was experimentally evaluated by an angle-resolved THz time-domain spectroscopy (THz-TDS) system and a strong-field THz-TDS system. This device could serve as a promising research platform for integrating THz with nano-optics and holds the potential for ultrafast modulation, offering application prospects in radar, wireless communication, and electromagnetic protection.

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用于分束和非线性共振移频的多功能太赫兹纳米超表面

太赫兹（THz）纳米级共振超表面器件的出现代表了一种利用太赫兹辐射中的强高频交变电场来调制太赫兹波的创新方法。然而，与采用电学、光学和其他技术的传统调制方法相比，这些设备的潜力仍然需要进一步探索。在这项工作中，我们在单个太赫兹纳米超表面器件中实现了太赫兹波束分裂和场致非线性移频函数。该器件由GaAs衬底上具有纳米间隙的单裂环谐振器（s-SRRs）组成。基于Pancharatnam-Berry （P-B）相位原理的模式设计可以将入射波分成三束。同时，对其随电场变化的移频性能进行了深入研究。通过角度分辨太赫兹时域光谱（THz- tds）系统和强场太赫兹时域光谱（THz- tds）系统对器件性能进行了实验评估。该器件可以作为太赫兹与纳米光学集成的研究平台，具有超快调制的潜力，在雷达、无线通信和电磁保护方面具有应用前景。

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

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.