Multi-channel terahertz focused beam generator based on shared-aperture metasurface

doi:10.1088/1674-1056/acddd2

中国物理B ›› 2023, Vol. 32 ›› Issue (12): 124204-124204.doi: 10.1088/1674-1056/acddd2

Multi-channel terahertz focused beam generator based on shared-aperture metasurface

Jiu-Sheng Li(李九生)^† and Yi Chen(陈翊)

Centre for THz Research, China Jiliang University, Hangzhou 310018, China

收稿日期:2023-05-08 修回日期:2023-06-03 接受日期:2023-06-13 出版日期:2023-11-14 发布日期:2023-11-22
通讯作者: Jiu-Sheng Li E-mail:lijsh2008@126.com
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.62271460) and the Zhejiang Key Research and Development Project, China (Grant Nos.2021C03153 and 2022C03166).

Multi-channel terahertz focused beam generator based on shared-aperture metasurface

Jiu-Sheng Li(李九生)^† and Yi Chen(陈翊)

Centre for THz Research, China Jiliang University, Hangzhou 310018, China

Received:2023-05-08 Revised:2023-06-03 Accepted:2023-06-13 Online:2023-11-14 Published:2023-11-22
Contact: Jiu-Sheng Li E-mail:lijsh2008@126.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.62271460) and the Zhejiang Key Research and Development Project, China (Grant Nos.2021C03153 and 2022C03166).

摘要/Abstract

摘要： Most of existing metasurfaces usually have limited channel behavior, which seriouslyhinders their development and application. In this paper, we propose a multi-channel terahertz focused beam generator based on shared-aperture metasurface, and the generator consists of a top square metal strip, a middle layer of silica and a metal bottom plate. By changing the position and size of the shared-aperture array, the designed metasurface can generate any number of multi-channel focusing beams at different predicted positions. In addition, the energy intensity of focusing beams can be controlled. The full-wave simulation results show that the metasurface achieves four-channel vortex focused beam generation with different topological charges, and five-, six-, eight-channel focused beam generation with different energy intensities at a frequency of 1 THz, which are in good agreement with the theoretically calculated predictions. This work can provide a new idea for designing the terahertz multichannel devices.

关键词: terahertz wave, multi-channel, shared-aperture, focused beam

Abstract: Most of existing metasurfaces usually have limited channel behavior, which seriouslyhinders their development and application. In this paper, we propose a multi-channel terahertz focused beam generator based on shared-aperture metasurface, and the generator consists of a top square metal strip, a middle layer of silica and a metal bottom plate. By changing the position and size of the shared-aperture array, the designed metasurface can generate any number of multi-channel focusing beams at different predicted positions. In addition, the energy intensity of focusing beams can be controlled. The full-wave simulation results show that the metasurface achieves four-channel vortex focused beam generation with different topological charges, and five-, six-, eight-channel focused beam generation with different energy intensities at a frequency of 1 THz, which are in good agreement with the theoretically calculated predictions. This work can provide a new idea for designing the terahertz multichannel devices.

Key words: terahertz wave, multi-channel, shared-aperture, focused beam

中图分类号: (Optical angular momentum and its quantum aspects)

42.50.Tx

03.65.Vf (Phases: geometric; dynamic or topological) 07.05.Tp (Computer modeling and simulation)

Jiu-Sheng Li(李九生) and Yi Chen(陈翊). Multi-channel terahertz focused beam generator based on shared-aperture metasurface[J]. 中国物理B, 2023, 32(12): 124204-124204.

Jiu-Sheng Li(李九生) and Yi Chen(陈翊). Multi-channel terahertz focused beam generator based on shared-aperture metasurface[J]. Chin. Phys. B, 2023, 32(12): 124204-124204.

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Multi-channel terahertz focused beam generator based on shared-aperture metasurface

Multi-channel terahertz focused beam generator based on shared-aperture metasurface

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