In this paper, a dynamically switchable dual-band absorber based on electromagnetically induced reflection (EIR) in metal-graphene hybrid metamaterial is proposed. The unit cell of metamaterial absorber has three layers. The top layer consists of two split-ring resonators (SRRs) and two orthogonal cut-wires (CWs) with different lengths. Due to the low reflection dips in EIR structure and good absorption of graphene, two absorption bands accompanied with more than 90% absorptions are obtained under y-polarized and x-polarized incident waves, respectively. The power loss densities at the absorption points clearly reveal the absorption positions of the metamaterial absorber. In addition, the electric field, magnetic field and surface current distributions explain the reason of high absorption. According to the surface currents at four resonant points, we draw the schematic diagrams of multipole moments, which are confirmed by multipole scattering theory. The tunable absorption performance of metamaterial absorber can be observed by tuning the Fermi level of graphene. The metamaterial absorber exhibits excellent wide polarization angle behavior and shows great prospects in multi-band metamaterial absorber under oblique incidence. The proposed metamaterial absorber expands the development of metamaterial and shows great potential for multifunctional metamaterial absorber.

在本文中，提出了一种基于金属-石墨烯混合超材料中的电磁感应反射（EIR）的动态可切换双波段吸收器。超材料吸收体的晶胞有三层。顶层由两个裂环谐振器 (SRR) 和两个不同长度的正交切割线 (CW) 组成。由于 EIR 结构的低反射倾角和石墨烯的良好吸收，在y偏振和x偏振下获得了两个吸收率超过 90% 的吸收带-极化的入射波，分别。吸收点的功率损耗密度清楚地揭示了超材料吸收体的吸收位置。此外，电场、磁场和表面电流分布解释了高吸收的原因。根据四个谐振点的表面电流，我们绘制了多极矩的示意图，并得到了多极散射理论的证实。通过调节石墨烯的费米能级，可以观察到超材料吸收体的可调吸收性能。超材料吸收体表现出优异的宽偏振角行为，在斜入射下的多波段超材料吸收体中显示出广阔的前景。