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<p>Metasurfaces are two-dimensional (2D), or quasi 2D structures that offer precise manipulation of electromagnetic waves in terms of their amplitudes, phases, and polarization. All-Dielectric Metasurfaces (ADMs) allow for high electromagnetic wave transmission, minimal energy losses, and seamless integration with current semiconductor technologies. In this work, a chiral ADM that is based on silicon (Si) U-shaped resonators is presented. Numerical simulations demonstrate a broadband efficient Asymmetric Transmission of incident linear electromagnetic waves (1.07 to 1.28 µm) with 18.03% fractional bandwidth. The performance is explained via eigenmode analysis and the associated field profiles of the structure’s eigenmodes. Moreover, the effects of different geometrical parameters are investigated providing insights for further optimization of the performance.</p>

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All dielectric chiral metasurface for wideband asymmetric transmission of linearly polarized waves

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年5月13日

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  • Amira J. Hamed,
  • Omar M. A. Elsayed,
  • M. Saeed Darweesh,
  • Ahmed M. Mahmoud

摘要

Metasurfaces are two-dimensional (2D), or quasi 2D structures that offer precise manipulation of electromagnetic waves in terms of their amplitudes, phases, and polarization. All-Dielectric Metasurfaces (ADMs) allow for high electromagnetic wave transmission, minimal energy losses, and seamless integration with current semiconductor technologies. In this work, a chiral ADM that is based on silicon (Si) U-shaped resonators is presented. Numerical simulations demonstrate a broadband efficient Asymmetric Transmission of incident linear electromagnetic waves (1.07 to 1.28 µm) with 18.03% fractional bandwidth. The performance is explained via eigenmode analysis and the associated field profiles of the structure’s eigenmodes. Moreover, the effects of different geometrical parameters are investigated providing insights for further optimization of the performance.