物理学报Issue(11)：1-7,7.DOI:10.7498/aps.63.118102
基于科赫分形的新型超材料双频吸收器
Study on a novel dual-band metamaterial absorb er by using fractal Ko ch curves
摘要
Abstract
In this paper we present a novel dual-band metamaterial absorber (MA), which is composed of a periodically arranged 2nd order Koch curve array and a metal ground separated by a dielectric spacer. By employing the fractal characteristic of space-filling, more compact unit cell with a size reduction of 17.5%has been achieved as compared with the conventional square-shaped MA. The dual-band operation is not originated from the hybrid or stacked methods as reported before, but from the two distinct resonance modes of the 2nd order Koch curves induced by the incident electromagnetic wave, and can be realized within a single unit cell. Due to its rotationally symmetric pattern, the absorptivity of the above presented MA is insensitive to the polarization of the incident waves and can perform well in a wide range of incident angles. The effective medium theory has been employed to investigate the underlying physical mechanism of the fractal MA, and good agreements between simulation and experimental results have been achieved.关键词
超材料/吸收器/分形Key words
metamaterials/absorber/fractal引用本文复制引用
马岩冰,张怀武,李元勋..基于科赫分形的新型超材料双频吸收器[J].物理学报,2014,(11):1-7,7.基金项目
国家自然科学基金(批准号:60721001,51132003,61171047)、国家自然科学基金青年科学基金(批准号:61001025)和广东省国家科技发展规划(批准号:2010B090400314)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant Nos.60721001,51132003,61171047), the National Natural Science Foundation for Youth of China (Grant No.61001025), and the National Programs for Science and Technology Development of Guangdong Province, China (Grant No.2010B090400314) （批准号:60721001,51132003,61171047）
