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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Wide-range frequency tunable absorber based on cross-groove metamaterials and graphene-sheet
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Wide-range frequency tunable absorber based on cross-groove metamaterials and graphene-sheet

机译：基于交叉槽超材料和石墨烯片的宽范围频率可调吸收器

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摘要

In this paper, a dynamic tunable graphene and metamaterial absorber with a periodic structure, composed of graphene and cross groove medium, is proposed. The results show that the absorption efficiency of the absorber is close to 100%, and by changing the chemical potential from 0.4 eV to 0.8 eV, the absorption peak can be adjusted from 6.4 THz to 8.75 THz, from 13.1 THz to 17.85 THz. The simulated electric field and power loss density distribution reveal that the absorption mainly comes from the excitation of continuous surface plasmon resonance on graphene structure. In addition, the absorber is insensitive to polarization, because both transverse electric and transverse magnetic modes have the geometric rotational symmetry of the unit structure. Furthermore, the absorption characteristics of the absorber can be adjusted dynamically by changing the chemical potential of graphene. The simulated results shows that the absorptivity is sensitive to the incident angle of the THz wave, which means this material can be used as angle sensors in the future.
机译：本文提出了一种动态可调石墨烯和具有由石墨烯和交叉槽介质的周期性结构的动态可调石墨烯和超材料吸收器。结果表明，吸收器的吸收效率接近100％，通过将化学电位从0.4 eV改变为0.8eV，吸收峰可以从6.4THz到8.75星，从13.1THz到17.85星。模拟电场和功率损耗密度分布揭示了吸收主要来自连续表面等离子体共振的激发石墨烯结构。另外，吸收器对极化不敏感，因为横向电动和横向磁性模式都具有单元结构的几何旋转对称性。此外，可以通过改变石墨烯的化学电位来动态调节吸收器的吸收特性。模拟结果表明，吸收率对THz波的入射角敏感，这意味着该材料可以在未来用作角度传感器。

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