Tunable terahertz hybrid graphene-metal patterns metamaterials

Tunable terahertz hybrid graphene-metal patterns metamaterials
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可调谐太赫兹杂化石墨烯-金属图案超材料

DOI:
10.1016/j.optlastec.2019.01.024
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发表时间:
2019-06
影响因子:
5
通讯作者:
Zhang Hao
Zhang Hao
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Shi Chenyuyi;He Xiaoyong;Peng Jun;Xiao Guina;Liu Feng;Lin Fangting;Zhang Hao

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基于金属-石墨烯混合结构,研究了石墨烯费米能级、结构参数和工作频率对Fano共振的影响。结果表明,可以观察到明显的Fano共振,Fano共振的最大峰值可达0.9711,Q品质因子大于20。在石墨烯层的帮助下,所提出的结构的谐振曲线可以被有效地调制,当费米能级在0.1-1.0 eV范围内变化时,频率调制深度可以达到60%。此外,通过改变石墨烯棒的长度,在10-60 μm范围内,振幅调制深度约为21.0%。研究结果对设计新型石墨烯基高Q值可调谐太赫兹器件,如调制器、传感器和天线等具有重要意义。
Based on the hybrid metal-graphene structures, we investigated the tunable Fano resonances in the terahertz region, including the effects of graphene Fermi levels, structural parameters, and operation frequencies. The results reveal that an obvious Fano resonance can be observed, the maximum peak value of Fano resonance can reach 0.9711, and itsQ-quality factor is more about 20. With the help of the graphene layer, the resonant curves of the proposed structures can be effectively modulated, the frequency modulation depth can reach 60% as the Fermi level changes in the range of 0.1–1.0 eV. In addition, by varying the length of graphene bar in the scope of 10–60 μm, the amplitude modulation depths are about 21.0%. The results are helpful for designing novel graphene-based tunable terahertz devices with highQfactor, e.g. modulators, sensors and antenna.
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