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Investigation of the tunable properties of graphene complementary terahertz metamaterials

机译:石墨烯互补石碑调节性能研究

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摘要

Based on the graphene-SiO2-Si structure, the tunable resonant properties of the complementary graphene metamaterials (MMs) have been investigated in the terahertz regime. The influence of operation frequency, the Fermi levels of the graphene layer, and different kinds of graphene patterns have been taken into account. The results manifest that the tunable mechanisms of the complementary graphene MMs structures mainly depend on the LC resonance. The resonant transmission and reflection properties of the complementary graphene MMs structures can be tuned over a wide range via controlling the applied electric fields. As the Fermi level of the graphene layer increases, the resonances of the MMs structure become stronger, and the resonant peaks of the transmission curves shift to the higher frequency, resulting from the permittivity of graphene layer increases in the THz regime. The transmission (reflection) spectrum is broad (sharp), which can be used to fabricate transmission modulators (reflection filters). The results are very helpful in the design of novel plasmonic devices and useful for the application of biomedical sensing and optical communications.
机译:基于石墨烯-SiO2-Si结构,在太赫兹制度中研究了互补石墨烯超材料(MMS)的可调谐共振性能。已经考虑了操作频率,石墨烯层的费米水平和不同种类的石墨烯图案的影响。结果表明,互补石墨烯MMS结构的可调机制主要取决于LC共振。可以通过控制所施加的电场在宽范围内调谐互补石墨烯MMS结构的谐振透射性和反射特性。随着石墨烯层的费米水平增加,MMS结构的谐振变得更强,并且透射曲线的谐振峰变为较高频率,由石墨烯层的介电常数增加了THZ制度。传输(反射)光谱是宽(锐利),可用于制造传输调制器(反射滤波器)。结果对新型等离子体装置的设计非常有用,并用于应用生物医学传感和光学通信。

著录项

  • 来源
    《RSC Advances》 |2015年第16期|共7页
  • 作者单位

    Shanghai Normal Univ Math &

    Sci Coll Dept Phys Shanghai 200234 Peoples R China;

    Shanghai Normal Univ Math &

    Sci Coll Dept Phys Shanghai 200234 Peoples R China;

    Shanghai Dianji Univ Sch Elect &

    Informat Shanghai 200240 Peoples R China;

    Shanghai Normal Univ Math &

    Sci Coll Dept Phys Shanghai 200234 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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