基于太赫兹超表面的多频段高效多功能偏振控制器

Multi-Band High-Efficiency Multi-Functional Polarization Controller Based on Terahertz Metasurface.

作者信息

Chen Huaijun, Zhao Wenxia, Gong Xuejian, Du Lianlian, Cao Yunshan, Zhai Shilong, Song Kun

机构信息

College of Physics and Electronic Information Engineering, Engineering Research Center of Nanostructure and Functional Materials, Ningxia Normal University, Guyuan 756000, China.

Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710129, China.

出版信息

Nanomaterials (Basel). 2022 Sep 14;12(18):3189. doi: 10.3390/nano12183189.

DOI:10.3390/nano12183189

PMID:36144976

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9501148/

Abstract

Electromagnetic metasurfaces with excellent electromagnetic wave regulation properties are promising for designing high-performance polarization control devices, while the application prospect of electromagnetic metasurfaces is limited because of the current development situations of the complex structure, low conversion efficiency, and narrow working bandwidth. In this work, we design a type of reflective terahertz metasurface made of a simple structure that can achieve multiple polarization modulation with high efficiency. It is shown that the presented metasurface can realize ultra-broadband, cross-polarization conversion with the relative working bandwidth reaching 94% and a conversion efficiency of over 90%. In addition, the proposed metasurface can also efficiently accomplish different polarization conversion functions, such as linear-to-linear, linear-to-circular, or circular-to-linear polarization conversion in multiple frequency bands. Due to the excellent properties, the designed metasurface can be used as a high-efficiency multi-functional polarization modulation device, and it has important application value in terahertz imaging, communication, biological detection, and other fields.

摘要

具有优异电磁波调控特性的电磁超表面在设计高性能偏振控制装置方面具有广阔前景，然而，由于当前复杂结构、低转换效率和窄工作带宽等发展现状，电磁超表面的应用前景受到限制。在这项工作中，我们设计了一种由简单结构制成的反射式太赫兹超表面，它能够高效实现多种偏振调制。结果表明，所提出的超表面能够实现超宽带交叉偏振转换，相对工作带宽达到94%，转换效率超过90%。此外，所提出的超表面还能在多个频段高效完成不同的偏振转换功能，如线偏振到线偏振、线偏振到圆偏振或圆偏振到线偏振转换。由于其优异性能，所设计的超表面可作为高效多功能偏振调制装置，在太赫兹成像、通信、生物检测等领域具有重要应用价值。