Multiple near-unity absorption modes are achieved by employing the graphene-dielectric-stack (GDS) strips. Through exciting the surface plasmon polaritons (SPP) resonance and the Fabry-Pérot (FP) resonance, the magnetic field is enhanced at graphene and the near impedance matching is obtained. It is found through the simulation method of rigorous coupled-wave analysis (RCWA) that different modes have distinct sensitivity against the change of the chemical potential of graphene, the geometric parameters of absorption structure along with the angle of incident light, since these modes relay on various resonances in varying degrees. Based on this, all of the modes number, the bandwidth and the peak-peak distance between different modes are controllable. The proposed functional device has tremendous potential applications in the terahertz range, such as multi-channel modulator, photoelectric detection and imaging.

通过采用石墨烯-电介质堆叠（GDS）条带可实现多种近统一吸收模式。通过激发表面等离激元极化子（SPP）共振和Fabry-Pérot（FP）共振，石墨烯处的磁场得到增强，并获得了近阻抗匹配。通过严格耦合波分析（RCWA）的模拟方法发现，不同的模式对石墨烯的化学势，吸收结构的几何参数以及入射光的角度的变化具有明显的敏感性，因为这些模式可以中继在不同程度的共振。基于此，所有模式数，带宽和不同模式之间的峰峰值距离都是可控的。拟议的功能设备在太赫兹范围内具有巨大的潜在应用，