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<p>The advancement of electromagnetic technologies necessitates strategies to efficiently exploit spectral and spatial resources in increasingly congested and interference-prone environments. This paper demonstrates, for the first time, a fully passive sliding metasurface that unifies sharp frequency filtering and wide-angle beam steering within a single architecture, thereby establishing a two-dimensional frequency–angle selection window. The proposed metasurface replaces local phase reconfiguration with a global geometric displacement between two complementary phase profiles. This sliding strategy produces a controlled translation of the spectral centroid in reciprocal space, enabling continuous beam steering and suggesting extensibility to other frequency regimes. In the demonstrated implementation, a transmission-line-inspired design is adopted, in which stacked layers are strategically reused to form a quasi–Fabry–Pérot cavity within the meta-atom, enabling simultaneous phase modulation and frequency-selective filtering. Experimental results validate sharp spectral selectivity, ultra-wide out-of-band suppression, and stable beam steering over a ± 57° scanning range. The proposed sliding metasurface offers a compact and broadly applicable platform for next-generation electromagnetic systems, enabling a new modality for coordinated spectral–spatial wave control.</p><p></p>

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Sliding metasurface for wide-angle beam steering with sharp frequency filtering

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月27日

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  • Haoyang Shi,
  • Xiangming Wu,
  • Xinwei Wang,
  • Yufei Zhao,
  • Jie Tian,
  • Weiren Zhu,
  • Guangwei Hu

摘要

The advancement of electromagnetic technologies necessitates strategies to efficiently exploit spectral and spatial resources in increasingly congested and interference-prone environments. This paper demonstrates, for the first time, a fully passive sliding metasurface that unifies sharp frequency filtering and wide-angle beam steering within a single architecture, thereby establishing a two-dimensional frequency–angle selection window. The proposed metasurface replaces local phase reconfiguration with a global geometric displacement between two complementary phase profiles. This sliding strategy produces a controlled translation of the spectral centroid in reciprocal space, enabling continuous beam steering and suggesting extensibility to other frequency regimes. In the demonstrated implementation, a transmission-line-inspired design is adopted, in which stacked layers are strategically reused to form a quasi–Fabry–Pérot cavity within the meta-atom, enabling simultaneous phase modulation and frequency-selective filtering. Experimental results validate sharp spectral selectivity, ultra-wide out-of-band suppression, and stable beam steering over a ± 57° scanning range. The proposed sliding metasurface offers a compact and broadly applicable platform for next-generation electromagnetic systems, enabling a new modality for coordinated spectral–spatial wave control.