金属-电介质微盘阵列红外吸收器的光学特性分析

发布时间：2018-04-11 21:01

本文选题：耦合等离激元 + 超材料　；参考：《光子学报》2017年08期

【摘要】：根据亚波长微结构的异常光谱特性,提出了一种"圆形铝盘-圆形SiO_2盘-铝衬底"的二维周期性微结构可调谐红外吸波器.利用有限元算法对其红外光谱反射性质进行了数值模拟,发现该结构对入射的TE或TM光偏振态、在0°~60°大入射角范围内具有良好的吸波效果,共振波长调谐范围4~11μm.用局域等离子体激元共振理论解释了红外吸波机理,证明了所提出的多层微盘结构具有更宽的调谐特性和更好的吸收效率.
[Abstract]:Based on the anomalous spectral characteristics of subwavelength microstructures, a two-dimensional periodic microstructured tunable infrared absorber with "circular aluminum disk, circular SiO_2 disk and aluminum substrate" is proposed.The reflection properties of the infrared spectrum are numerically simulated by the finite element method. It is found that the structure has a good absorbing effect on the incident te or TM light polarization in the large incidence angle of 0 掳~ 60 掳, and the tuning range of the resonant wavelength is 411 渭 m.The infrared absorbing mechanism is explained by using the local plasmon resonance theory. It is proved that the multilayer microdisk structure has wider tuning characteristics and better absorption efficiency.
【作者单位】：天津大学精密仪器与光电子工程学院光电信息技术教育部重点实验室;
【基金】：国家自然科学基金(Nos.11674243,11674242) 中央高校基本科研业务费专项基金(No.3122016D029)资助~~
【分类号】：TN21

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