摘要
设计了一种基于有图案石墨烯的超薄宽带太赫兹超材料吸收体,该吸收体的厚度为33.254μm(即入射波波长的1/7),吸收率在80%以上的吸收带宽达到1.422THz。仿真及分析结果表明,该吸收体的吸收特性呈偏振无关,并对入射角的变化不敏感;通过改变石墨烯的化学电势能够有效地调控吸收体的吸收能量,增加聚酰亚胺中间层厚度可提高吸收体的吸收性能。
Based on patterned graphene, an ultra-thin broadband terahertz metamaterial absorber with the thickness of 33. 254 μm （about 1/7 of the incident wavelength） is designed. The bandwidth with an absorptivity of above 80,% can reach 1. 422 THz. The simulation and analysis results show that the absorption characteristics of this absorber is polarization-independent and insensitive to the incident angle. The absorbed energy of this absorber can be adjusted effectively by changing the chemical potential of graphene. In addition, the absorption performance can be improved when the thickness of polyimide interlayer increases.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2017年第7期231-237,共7页
Chinese Journal of Lasers
基金
国家自然科学基金(61275091
61327006)
国家自然科学基金国际(地区)合作与交流项目(61620106014)
关键词
材料
石墨烯
超材料
太赫兹
吸收
宽带
material
graphene
metamaterial
terahertz
absorption
broadband
