论文部分内容阅读
提出了一种基于双开口方形薄片的太赫兹超材料吸收器。该吸收器结构单元是由典型的三层结构组成,上下两层为金属层、中间为介质层、顶层金属层由四个大小相同的双开口方形薄片排列而成。研究结果表明,吸收器分别在1.298THz和1.662THz处实现了99%以上的吸收率。之后,通过改变方形薄片的大小及开口尺寸,对方形薄片重新排列,在1.348~1.568THz频段处实现了吸收率80%以上,带宽为0.22THz的宽带吸收。该吸收器结构简单,具有偏振不相关性,且能实现大角度吸收,在太赫兹波成像、探测及电磁隐身等方面有极大的潜在应用价值。
A THz metamaterial absorber based on double-opening square sheets is proposed. The absorber structure unit is composed of a typical three-layer structure, the upper and lower two layers of metal layer, the middle of the dielectric layer, the top metal layer is composed of four identical size double opening square sheet arranged. The results show that the absorber achieves over 99% absorbance at 1.298 THz and 1.662 THz, respectively. After that, by changing the size of the square sheet and the size of the opening, the square sheet was rearranged to achieve a broadband absorption of more than 80% and a bandwidth of 0.22 THz at a frequency band of 1.348-1.568 THz. The absorber has the advantages of simple structure, polarization irrelevance, high-angle absorption, and great potential application in the fields of terahertz wave imaging, detection and electromagnetic invisibility.