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<p>Metasurfaces can flexibly regulate terahertz wave, but most of reported results are limited to single polarized terahertz wavefront manipulation. In this article, the propose metasurface can manipulate linearly polarized and circularly polarized terahertz waves. It consists of five metal layers (namely metal rectangular bars, metal rings, two orthogonal metal gratings, and I-shaped metal layers) separated by four polyimide dielectric layers. For circularly polarized wave incidence, the metasurface generates vortex beams with topological charges of <i>l</i> =  ± 1 and <i>l</i> =  ± 2 at frequency of 1.2 THz. In addition, the metasurface achieves “T” shaped near-field image at 0.931 THz. Under linearly polarized wave incidence, the metasurface produces polarization conversion with a conversion ratio over 98% within the frequency range of 0.6–0.8 THz. The proposed structure has potential application prospects in terahertz wave multi-polarized manipulation in future terahertz wireless communication.</p>

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Dual-polarization controllable terahertz wave metasurface

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Jiu-Sheng Li,
  • Feng-Lei Guo,
  • Ri-Hui Xiong

摘要

Metasurfaces can flexibly regulate terahertz wave, but most of reported results are limited to single polarized terahertz wavefront manipulation. In this article, the propose metasurface can manipulate linearly polarized and circularly polarized terahertz waves. It consists of five metal layers (namely metal rectangular bars, metal rings, two orthogonal metal gratings, and I-shaped metal layers) separated by four polyimide dielectric layers. For circularly polarized wave incidence, the metasurface generates vortex beams with topological charges of l =  ± 1 and l =  ± 2 at frequency of 1.2 THz. In addition, the metasurface achieves “T” shaped near-field image at 0.931 THz. Under linearly polarized wave incidence, the metasurface produces polarization conversion with a conversion ratio over 98% within the frequency range of 0.6–0.8 THz. The proposed structure has potential application prospects in terahertz wave multi-polarized manipulation in future terahertz wireless communication.