基于超材料的太赫兹波段多频吸收器

Terahertz multi-frequency absorbers based on metamaterials

基于闭合三圆环结构,设计了一种太赫兹超材料吸收器。研究表明,该超材料设计单元在0. 5 THz～2. 5 THz范围内表现出显著的多频吸收的性能,对应三个频率的吸收率都达到98%以上。通过改变单元结构金属环的径向宽度发现,随着金属环径向宽度的增加,对应的吸收频率会发生一定程度的蓝移,当径向宽度为3μm时,单元结构吸收性能最佳,达到99%以上。研究结论为太赫兹吸收器的研究提供参考。

Based on the closed three-ring structure, a terahertz metamaterial absorber is designed. This study shows that the metamaterial design unit exhibits significant multi-frequency absorption performance in the range of 0.5 THz^2.5 THz, and the corresponding three-absorption rate reaches more than 98%. By changing the radial width of the metal ring of the cell structure, it is found that with the increase of the radial width of the metal ring, the corresponding absorption frequency will have a certain degree of blue shift. When the radial width is 3μm, the cell structure has the best absorption performance, the absorption rate is more than 99%. The research conclusions provide reference for the research of terahertz absorbers.