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<p>The electromagnetic radiation emitted by the sun is recognized as a substantial source of energy within the realm of renewable energy. The metamaterial absorber (MMA) constitutes a unique advancement in the efficient harnessing of this prevalent energy source. This investigation illustrates and numerically analyzes a three-layer Mn-SiO<sub>2</sub>-Mn structured MMA, establishing effective EM energy absorption across the complete visible spectrum (380–700&#xa0;nm). The numerical findings indicate that the MMA effectively absorbs over 99% of electromagnetic waves within the range of 446–566&#xa0;nm, achieving a peak absorption of 99.99% and an average absorption rate of 97.19% across the entire visible spectrum. The normalized impedance and spatial distribution of the electric field have all been analyzed to elucidate the absorption characteristics and the specific regions of absorption. The polarization conversion ratio (PCR) is illustrated to confirm the optimal characteristics of MMA. Furthermore, the absorption characteristics maintain consistency over a broad range of polarization angles and oblique incident angles. The proposed MMA demonstrates potential applications across multiple domains, such as solar energy harvesting, photoelectric detectors, optical modulators, and plasmonic&#xa0;sensors.</p>

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Design and investigation of a flower-shaped polarization-insensitive wideband metamaterial absorber for energy harvesting application

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Sarwar Uddin,
  • Sikder Sunbeam Islam,
  • Istiaq Hossain Chowdhury

摘要

The electromagnetic radiation emitted by the sun is recognized as a substantial source of energy within the realm of renewable energy. The metamaterial absorber (MMA) constitutes a unique advancement in the efficient harnessing of this prevalent energy source. This investigation illustrates and numerically analyzes a three-layer Mn-SiO2-Mn structured MMA, establishing effective EM energy absorption across the complete visible spectrum (380–700 nm). The numerical findings indicate that the MMA effectively absorbs over 99% of electromagnetic waves within the range of 446–566 nm, achieving a peak absorption of 99.99% and an average absorption rate of 97.19% across the entire visible spectrum. The normalized impedance and spatial distribution of the electric field have all been analyzed to elucidate the absorption characteristics and the specific regions of absorption. The polarization conversion ratio (PCR) is illustrated to confirm the optimal characteristics of MMA. Furthermore, the absorption characteristics maintain consistency over a broad range of polarization angles and oblique incident angles. The proposed MMA demonstrates potential applications across multiple domains, such as solar energy harvesting, photoelectric detectors, optical modulators, and plasmonic sensors.