基于氮化钛和二氧化钛的可见近红外超宽带吸收器摘要设计了一种基于耐火材料氮化钛（TiN）和二氧化钛（TiO2）的光栅型超宽带太阳能吸收器，采用有限元方法研究了其吸收特性，分析了其结构参数、工作波长和入射角度对其吸收性能的影响。结果表明：通过调整结构参数可以有效地控制其吸收特性。在 500~2000 nm 的波长范围，在入射角度为 0°~75°范围内，吸收效率可以达到 80%以上，表现出了超宽带吸收的特性。本文设计的吸收器在热光伏等方面有潜在的应用前景。关键词吸收器；光栅；磁激元；可见光；近红外Visible and near-infrared ultra-broadband absorber based on titanium nitride and titanium dioxideAbstract A grating type ultra wide band solar absorber based on the refractory titanium nitride (TiN) and titanium dioxide (TiO2) was designed. The absorption characteristics of the absorber were studied by using the finite element method, and the effects of its structural parameters, working wavelength and incident angle on its absorption performance were analyzed. The results show that the absorption characteristics can be effectively controlled by adjusting the structural parameters. In the wavelength range of 500~2000 nm and the incident angle range of 0°~75°, the absorption efficiency can reach more than 80%, showing the characteristics of ultra-broadband absorption. The absorber designed in this paper has a potential application prospect in thermophotovoltaic and other aspects.Keywords:Absorber; Grating; Magnetic polariton; Visible light; Near-infrared1. 引言电磁吸收器是一种能有效吸收特定波长的电磁波并将其转化为其它形式的能量的装置[1]，由不同的介质或谐振器组成，其吸收性能主要取决于其结构、材料和吸收机理。它们在太阳能收集 Error: Reference source not found、传感[3]、探测[4]和电磁隐身[5]等方面有潜在的应用前景。电磁吸收器通常通过激发复杂结构的多种响应来吸收特定波长的电磁波，结构的复杂程度与加工工艺息息相关。典型的电磁吸收器的结构一般基于“金属-绝缘体-金属”（MIM）...
