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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。
An ultrathin broadband THz metamaterial absorber based on patterned graphene has been designed. The thickness of the absorber is 33.254μm (1/7 of the wavelength of the incident wave), and the absorption bandwidth above 80% reaches 1.422 THz. Simulation and analysis results show that the absorption characteristics of the absorber are polarization-independent and insensitive to the change of incident angle. By changing the chemical potential of graphene, the absorption energy of the absorber can be effectively controlled and the thickness of the polyimide interlayer can be increased Absorbent can improve the absorption performance.