Theoretical design of a triple-band perfect metamaterial absorber in the THz frequency range
Theoretical design of a triple-band perfect metamaterial absorber in the THz frequency range
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太赫兹频率范围内三频完美超材料吸波体的理论设计
DOI：
10.1016/j.rinp.2019.102463
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发表时间：
2019-09-01
影响因子：
5.3
通讯作者：
Hua, Jiangjin
中科院分区：
文献类型：
--
作者：
Cen, Chunlian;Yi, Zao;Hua, Jiangjin
提出了一种基于周期性排列的石墨烯开口环谐振器（SRR）的三波段理想超材料吸收体。计算结果表明，SRR结构在3.56THz、10.38THz和12.96THz处有三个吸收峰，吸收效率分别为99.57%、99.98%和99.76%。通过改变化学势或弛豫时间，可以灵活地调谐开口环谐振器结构的吸收特性。此外，我们也研究了所提出的超材料吸收体的传感性能，高频段的传感性能明显高于低频段。我们相信，我们的研究结果将铺平道路的应用开发使用超材料具有高效率和多波段光谱选择性的生化传感，光开关和调制。
A triple-band perfect metamaterial absorber based on periodically arranged graphene split ring resonator ( SRR) is proposed in this study. The calculation results by the FDTD method indicate that the SRR structure has three absorption peaks at frequencies 3.56 THz, 10.38 THz and 12.96 THz with absorption efficiency 99.57%, 99.98%, and 99.76%, respectively. By changing the chemical potential or relaxation time, the absorption characteristics of the split ring resonator structure can be flexibly tuned. Furthermore, we also examine the sensing performance of the proposed metamaterial absorber, the sensing performance of the high-frequency band is significantly higher than the low-frequency band. We believe that our results will pave the ways for the development of applications using metamaterials with high efficiency and multi-band spectral selectivity in biochemical sensing, optical switching, and modulating.