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Broadband Perfect Absorber in the Visible Range Based on Metasurface Composite Structures
oleh: Ran Wang, Song Yue, Zhe Zhang, Yu Hou, Hongda Zhao, Shitian Qu, Man Li, Zichen Zhang
Format: | Article |
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Diterbitkan: | MDPI AG 2022-04-01 |
Deskripsi
The broadband perfect absorption of visible light is of great significance for solar cells and photodetectors. The realization of a two-dimensional broadband perfect absorber in the visible range poses a formidable challenge with regard to improving the integration of optical systems. In this paper, we numerically demonstrate a broadband perfect absorber in the visible range from 400 nm to 700 nm based on metasurface composite structures. Simulation results show that the average absorptance is ~95.7% due to the combination of the intrinsic absorption of the lossy metallic material (Au) and the coupling resonances of the multi-sized resonators. The proposed perfect absorber may find potential applications in photovoltaics and photodetection.