基于人工微结构的大面积高效率近红外吸收器

Large-area high-performance near-infrared absorber based on plasmonic nanostructures

基于人工微结构超材料的先进理念,设计制备工作波长可调的近红外大面积吸收器.器件制备采用纳米微球化学自组装方法制备顶层金属微结构,该方法可制备大面积样品.实验结果显示,吸收器在近红外波段峰值吸收率超过99%,吸收波长可以通过结构单元几何尺寸调节.理论模拟结果不但与实验测量的数据相一致,而且很好地阐述了器件高效光吸收的物理机理.

A large-area high-performance near-infrared absorber based on plasmonic nanostructures is introduced,fabricated and experimentally characterized.The periodic plasmonic nanostructures are prepared by self-assembled template,a charming low-cost technology for making large-area samples.Experimental results show that the absorbance can be as high as 99%.The spectral position of the absorption peak is experimentally demonstrated to be tuned by the geometric dimensions.The physical origin of the absorption effect is theoretically explained as well.