材料科学
超材料吸收剂
光学
超材料
摩尔吸收率
光电子学
时域有限差分法
栅栏
极化(电化学)
表面等离子体激元
雷
瑞利散射
宽带
吸收(声学)
表面等离子体子
等离子体子
物理
可调谐超材料
化学
物理化学
作者
Xinye Tian,Xuejun Qiu,Zhenzhou Cao,Jing Hou,Chao Yang
标识
DOI:10.1016/j.optlastec.2022.108729
摘要
A broadband metamaterial absorber (BMA) based on a thin metamaterial nanostructure consisting of 2D Au square grating on graphene-SiO2 film and Au substrate is proposed and designed. The optimized structure can achieve nearly perfect absorption with absorption of exceeding 90 % spanning a broad range from deep UV light to visible light (100 nm−700 nm). The excitation of Rayleigh anomaly (RA), cavity resonance (CR), surface plasmon polaritons (SPPs) and magnetic polaritons (MPs) are responsible for nearly perfect broadband absorption, which have been analysed clearly by finite-difference time-domain (FDTD) method and the LC circuit model. Furthermore, the BMA is polarization and angle insensitive for incident light even at large angle. This proposed BMA not only has a simple geometry and ordinary metal-based material composition, but also shows a high performance in both bandwidth and absorptivity, suggesting that great potential in solar cell and photodetector applications.
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