Broadband Perfect Absorber in the Visible Range Based on Metasurface Composite Structures |
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| Authors: | Ran Wang Song Yue Zhe Zhang Yu Hou Hongda Zhao Shitian Qu Man Li Zichen Zhang |
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| Affiliation: | 1.Microelectronics Instruments and Equipments R&D Center, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China; (R.W.); (S.Y.); (Z.Z.); (Y.H.); (H.Z.); (S.Q.); (M.L.);2.School of Microelectronics, University of Chinese Academy of Sciences, Beijing 101499, China |
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| Abstract: | 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. |
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| Keywords: | broadband perfect absorber metasurface composite structure material intrinsic absorption coupling resonance |
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