Functionally switchable terahertz metasurface under linearly polarized and circularly polarized waves incidence

IF 2.8 3区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Express Pub Date : 2023-12-21 DOI:10.1364/ome.509261

Shu-ping Zhang, Jiu-Sheng Li, and Feng-lei Guo

引用次数: 0

Abstract

Currently, most reported terahertz metasurfaces can only respond to terahertz waves with a single polarization state (linearly polarized or circularly polarized wave), which poses a problem of limited degrees of freedom in regulation. Facing this challenging issue, we design a functionally switchable terahertz metasurface that can achieve independent control of linearly polarized and circularly polarized terahertz waves. It comprises a top layer photosensitive silicon and metal composite structure, a middle polyimide medium, and a bottom layer metal plate. By changing the conductivity of photosensitive silicon, the same metasurface structure can achieve two different functional mode switching under different polarization wave incidences, such as switching between beam splitting and vortex beam, switching between RCS and multi vortex beams, switching between single focus and multi focus. This structure provides a new idea for the flexible regulation of terahertz waves.

查看原文本刊更多论文

在线性偏振波和圆极化波入射条件下可功能切换的太赫兹元表面

目前，大多数已报道的太赫兹元表面只能响应单一极化状态（线性极化或圆极化波）的太赫兹波，这就带来了调节自由度有限的问题。面对这个具有挑战性的问题，我们设计了一种功能可切换的太赫兹元表面，可以实现对线性极化和圆极化太赫兹波的独立控制。它由顶层光敏硅和金属复合结构、中间聚酰亚胺介质和底层金属板组成。通过改变光敏硅的电导率，同一元表面结构可在不同偏振波发生率下实现两种不同功能模式的切换，如分束和涡束切换、RCS 和多涡束切换、单聚焦和多聚焦切换等。这种结构为灵活调节太赫兹波提供了一种新思路。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Optical Materials Express MATERIALS SCIENCE, MULTIDISCIPLINARY-OPTICS

CiteScore

5.50

自引率

3.60%

发文量

377

审稿时长

1.5 months

期刊介绍： The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community. Optical Materials Express (OMEx), OSA''s open-access, rapid-review journal, primarily emphasizes advances in both conventional and novel optical materials, their properties, theory and modeling, synthesis and fabrication approaches for optics and photonics; how such materials contribute to novel optical behavior; and how they enable new or improved optical devices. The journal covers a full range of topics, including, but not limited to: Artificially engineered optical structures Biomaterials Optical detector materials Optical storage media Materials for integrated optics Nonlinear optical materials Laser materials Metamaterials Nanomaterials Organics and polymers Soft materials IR materials Materials for fiber optics Hybrid technologies Materials for quantum photonics Optical Materials Express considers original research articles, feature issue contributions, invited reviews, and comments on published articles. The Journal also publishes occasional short, timely opinion articles from experts and thought-leaders in the field on current or emerging topic areas that are generating significant interest.