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<p>Self-dual media (SDM) coatings provide a powerful means to enhance wave transmission through subwavelength apertures in conducting screens. When applied around an aperture, SDM suppresses reflections and directs incident electromagnetic energy exclusively through the opening. Experimental and numerical studies show that a finite, double-sided SDM coating with dimensions of about <InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="41598_2025_24709_Article_IEq1.gif" Format="GIF" Height="19" Rendition="HTML" Resolution="72" Type="Linedraw" Width="75" /> </InlineMediaObject> <EquationSource Format="TEX">\(\lambda /2 \times \lambda /2\)</EquationSource> </InlineEquation> increases transmitted power by roughly 10&#xa0;dB compared to an uncoated reference. This effect is non-resonant, enabling broadband operation constrained only by the material design. Unlike earlier methods that mainly improved radiation directivity without altering the transmitted power, this approach significantly boosts power density within the aperture itself. These findings highlight SDM coatings as a versatile strategy for efficient energy transmission through sub-wavelength structures, with potential applications in waveguiding, sensing, phased arrays and energy harvesting technologies.</p>

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Enhanced non resonant transmission through subwavelength apertures in conducting screens using self dual coats

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月19日

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  • Roee Geva,
  • Anton Kharchevskii,
  • Omer Tzidki,
  • Pavel Ginzburg,
  • Raphael Kastner

摘要

Self-dual media (SDM) coatings provide a powerful means to enhance wave transmission through subwavelength apertures in conducting screens. When applied around an aperture, SDM suppresses reflections and directs incident electromagnetic energy exclusively through the opening. Experimental and numerical studies show that a finite, double-sided SDM coating with dimensions of about \(\lambda /2 \times \lambda /2\) increases transmitted power by roughly 10 dB compared to an uncoated reference. This effect is non-resonant, enabling broadband operation constrained only by the material design. Unlike earlier methods that mainly improved radiation directivity without altering the transmitted power, this approach significantly boosts power density within the aperture itself. These findings highlight SDM coatings as a versatile strategy for efficient energy transmission through sub-wavelength structures, with potential applications in waveguiding, sensing, phased arrays and energy harvesting technologies.