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<p>This study investigates an ultrathin and simple design high-emissivity metamaterial absorber with thermally stable properties, developed from a periodic arrangement of stacked circular disk resonators made of temperature-resistant materials, deposited on a silicon (Si) substrate. The developed metamaterial structure exhibits a total emissivity above 90% over the broadband spectrum range of 400–5000&#xa0;nm. By optimizing the unit cell design parameters, a thermal radiation efficiency of 96. 45% at 1100&#xa0;°C is attained, owing to the structure’s superior light energy absorption properties. Moreover, variations in different design parameters do not substantially impact the total emissivity. The symmetry in the unit cell structure exhibits robustness to different polarized waves and provides wide angular stability while retaining high emissivity. With all these benefits, the developed solar absorber design possesses potential to be utilized in solar photovoltaic thermal (SPVT) systems.</p>

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Stacked circular disk Resonator-based highly efficient and thermally stable broadband metamaterial solar absorber for SPVT systems

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Meshari Alsharari,
  • Ammar Armghan,
  • Khaled Aliqab

摘要

This study investigates an ultrathin and simple design high-emissivity metamaterial absorber with thermally stable properties, developed from a periodic arrangement of stacked circular disk resonators made of temperature-resistant materials, deposited on a silicon (Si) substrate. The developed metamaterial structure exhibits a total emissivity above 90% over the broadband spectrum range of 400–5000 nm. By optimizing the unit cell design parameters, a thermal radiation efficiency of 96. 45% at 1100 °C is attained, owing to the structure’s superior light energy absorption properties. Moreover, variations in different design parameters do not substantially impact the total emissivity. The symmetry in the unit cell structure exhibits robustness to different polarized waves and provides wide angular stability while retaining high emissivity. With all these benefits, the developed solar absorber design possesses potential to be utilized in solar photovoltaic thermal (SPVT) systems.