Enhanced broadband perfect absorption in visible and near-infrared regimes

Dong Mei Liu, Duo Lin Wang, Jiu-Fu Ruan and Yao-Hui Hu

Journal of Electromagnetic Waves and Applications, 2024, vol. 38, issue 15, 1649-1657

Abstract: It is still a challenge to achieve perfect ((near-unity)) absorption across a wide wavelength range with a three-layer structure. This paper presents a metamaterial absorber (MA) based on MXene that can achieve broadband and perfect absorption in the near-infrared and visible regions. The MA with a simple three-layer structure consists of a top Ti3C2Tx layer, an intermediate dielectric layer and a bottom gold layer. It can achieve perfect absorption (the absorptivity over 99%) in the wavelength range of 730–900 nm. The electric field distribution reveals that the localized surface plasmon resonance occurring at the interface of Ti3C2Tx and SiO2 leads to strong absorption over the wide wavelength range. Furthermore, the MA exhibits excellent angular stability. This work provides a method to construct MAs with broadband perfect absorption in the near-infrared and visible band.

Date: 2024
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DOI: 10.1080/09205071.2024.2394434

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