4.5 Article

Perfect Solar Absorber Based on Four-Step Stacked Metamaterial

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PHOTONICS
卷 10, 期 10, 页码 -

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MDPI
DOI: 10.3390/photonics10101082

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solar absorber; metamaterial; surface plasmon resonance; spectral selectivity

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Solar absorbers are crucial for the development of new energy technologies, but current methods are often complex and fail to achieve high absorption rates across a wide range of wavelengths. In this study, a four-step stacked metamaterial solar absorber is proposed, which achieves near-perfect absorption. The absorber shows high absorption rates due to the propagating surface plasmon resonance (PSPR) and localized surface plasmon resonance (LSPR) modes. It offers broadband, high absorption rates, and high spectrum selectivity, and has promising applications in the renewable energy industry.
Solar absorbers are of great significance in the development of new energy technologies. However, the current approaches are mostly complex and fail to achieve high absorption rates across a wide range of wavelengths. Here, we propose a four-step stacked metamaterial solar absorber that achieves near-perfect absorption. Our four-step stacked absorber (FSSA) boasts an average absorption rate of 96.32% from 499 nm to 2348.3 nm, and a high average absorption rate of 94.96% from 300 nm to 2500 nm. Electromagnetic mode analysis and the impedance matching theory were employed to analyze the designed FSSA, which revealed that the high absorption rates are due to the propagating surface plasmon resonance (PSPR) and localized surface plasmon resonance (LSPR) modes. The FSSA offers broadband, high absorption rates, and high spectrum selectivity. Additionally, the structural parameters are adjusted to optimize the proposed perfect solar absorber. This proposed absorber can have promising applications in the renewable energy industry.

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