陕西师范大学学报（自然科学版）2013，Vol.41Issue(1)：32-35,4.
基于分形结构的太赫兹超材料吸波体
Terahertz metamaterial absorbers based on fractal structures
摘要
Abstract
A metamaterial absorber based on fractal structure is designed in terahertz regime. Dual-band absorptions are presented. The influence of substrate thickness on absorptivity is investigated through numerical simulation. With regulation of substrate thickness, impedance matching between the absorber and free space is approximately achieved. When substrate thickness is 5. 4 μm, the reflectivity of the first resonant point A is low, but the absorptivity is high. When substrate thickness is 1. 4 μm, the absorptivity of the second resonant point B reach 99. 9%. With the increase of fractal dimension, point B moves to high frequency, but its absorptivity remains. Simulation results show that the absorbers with different resonant frequencies can be designed by adjusting the fractal dimension. With simulation and optimization of double-layer and triple-layer structures, the broadband absorbers are also designed.关键词
超材料/太赫兹/分形/宽频带Key words
metamaterial/ terahertz/ fractal/ broadband分类
数理科学引用本文复制引用
杨娴,张建民..基于分形结构的太赫兹超材料吸波体[J].陕西师范大学学报（自然科学版）,2013,41(1):32-35,4.基金项目
国家自然科学基金资助项目(51071098). （51071098）
