基于叠层与嵌套结构的太阳能吸收器设计  

Design of Solar Absorber Based on Laminar and Nested Structure

作　　者：焦圣喜[1] 杨旭 杨汉瑞[1] JIAO Shengxi;YANG Xu;YANG Hanrui(School of Automation Engineering,Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学自动化工程学院,吉林132012

出　　处：《光子学报》2025年第3期172-183,共12页Acta Photonica Sinica

基　　金：吉林省科技厅自然研究基金(Nos.20230101235JC,202101ZYTS140)。

摘　　要：提出一种叠层圆环嵌套圆柱体的超材料太阳能吸收器,该吸收器结构由底部金属与介质层和上层嵌套圆柱体的叠层圆环组成,可以实现稳定的高吸收。利用有限时域差分方法,深度分析了吸收器的光吸收谱图以及电磁场强度在内部的分布情况,并研究了入射光的偏振角及入射角对吸收器的光吸收影响。实验仿真结果表明,该吸收器在300~2500 nm范围内的平均吸收率为94.34%,且具有偏振不敏感的特性;当入射角度为60°时,平均吸收率仍保持88.81%,宽波段高吸收的激发主要由传播表面等离子体共振、局域表面等离子体共振的协同作用实现,在标准太阳光谱辐射下的总吸收效率为94.46%。本设计在太阳能吸收利用领域具有潜在应用价值,也为宽带吸收器的设计提供了研究思路。The issue of energy has now risen as a key topic that human society needs to urgently address.Among these problems,solar energy is a common sustainable and environmentally friendly energy source.If solar energy is effectively tapped and applied,it can not only significantly reduce our dependence on conventional energy sources,but also help to alleviate the problem of environmental pollution.Solar absorber is an important component of solar energy utilization system that absorbs solar energy radiation and is essential to achieve high photothermal conversion efficiency.In this paper,a metamaterial solar absorber with a stacked circular nested cylinder is proposed,which is structured by a bottom metal and dielectric layer and a stacked circular nested cylinder in the upper layer.The absorption spectrum and electromagnetic field energy distribution of the absorber are studied and analyzed by the finite time domain difference method,as well as the effects of polarization angle and incidence angle on the absorption performance,and then analyzed by comparing the experiments for the effects of the structural dimensions of the absorber on the absorption rate.This design has potential application value in the field of solar energy absorption and utilization,and also provides research ideas for the design of broadband absorber.In summary,a solar absorber was designed by combining stacked and nested structures and its absorption characteristics were investigated.The FDTD method is used to investigate the effect of different geometrical parameters on the absorption properties.When applying the FDTD method to the calculation,the periodic boundary conditions in the x and y directions are set,while the boundary condition in the z direction is a Perfectly Matched Layer(PML),and the mesh step is set to be 10 nm.With regard to the dielectric constants of the materials,the dielectric constants of Ti,W,and SiO2 are referred to the experimental values of Palik.The substrate of the designed absorber is chosen as the substrate of the ab

关 键 词：超材料 太阳能吸收器 宽波段 高吸收率 

分 类 号：O431[机械工程—光学工程]