Terahertz transmissive quarter-wave plate based on free-standing T-shaped metasurface

IF 3.8 2区物理与天体物理 Q2 PHYSICS, APPLIED

Applied Physics Letters Pub Date : 2026-10-05 DOI:10.1063/5.0355903

Oleg Kameshkov,Vladlen Shvedov,Yana Izdebskaya,Andrei Lavrinenko,Ilya Shadrivov

引用次数: 0

Abstract

In this paper, we propose a freestanding T-shaped metallic metasurface operating as a transmissive narrow-band terahertz quarter-wave plate near 0.6 THz. The device achieves a circular polarization conversion efficiency approaching the theoretical limit of 50% and produces nearly pure circularly polarized output radiation. The structure is composed of two orthogonal slot resonators cut in a metal film. A 40-mm-diameter metasurface was fabricated from a 10-μm-thick copper film by UV laser micromachining, offering a fast, scalable, and cost-effective route toward substrate-free terahertz meta-optical elements. The performance of the fabricated quarter-wave plate was validated using terahertz time-domain spectroscopy.

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基于独立t形超表面的太赫兹透射四分之一波片

在本文中，我们提出了一个独立的t形金属超表面作为一个传输窄带太赫兹近0.6太赫兹的四分之一波板。该装置实现了圆偏振转换效率接近50%的理论极限，并产生了几乎纯圆偏振的输出辐射。该结构由切割在金属薄膜中的两个正交槽谐振器组成。采用紫外激光微加工技术，在10 μm厚的铜膜上制备了直径40 mm的超表面，为制造无衬底的太赫兹元光学元件提供了一条快速、可扩展且经济有效的途径。利用太赫兹时域光谱对所制备的四分之一波片的性能进行了验证。

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.