基于超表面复合结构的可见光波段宽带完美吸收器

Broadband Perfect Absorber in the Visible Range Based on Metasurface Composite Structures.

作者信息

Wang Ran, Yue Song, Zhang Zhe, Hou Yu, Zhao Hongda, Qu Shitian, Li Man, Zhang Zichen

机构信息

Microelectronics Instruments and Equipments R&D Center, Institute of Microelectronics of Chinese Academy of Sciences, Beijing 100029, China.

School of Microelectronics, University of Chinese Academy of Sciences, Beijing 101499, China.

出版信息

Materials (Basel). 2022 Apr 1;15(7):2612. doi: 10.3390/ma15072612.

DOI:10.3390/ma15072612

PMID:35407943

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9000352/

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.

摘要

可见光的宽带完美吸收对于太阳能电池和光电探测器具有重要意义。在可见光范围内实现二维宽带完美吸收体，在改善光学系统集成方面面临巨大挑战。在本文中，我们基于超表面复合结构，通过数值模拟展示了一种在400纳米至700纳米可见光范围内的宽带完美吸收体。模拟结果表明，由于有损金属材料（金）的固有吸收和多尺寸谐振器的耦合共振相结合，平均吸收率约为95.7%。所提出的完美吸收体可能在光伏和光电探测领域找到潜在应用。