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Wideband circular polarization converter based on graphene metasurface at terahertz frequencies

机译：基于石墨烯元的宽带圆极化转换器在太赫兹频率下

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摘要

Linear-to-circular polarization converters are widely used in optical and microwave systems, but the polarization devices of traditional materials are untunable, and devices made of graphene materials can overcome this disadvantage. A circular polarization converter based on graphene metasurface is designed, whose properties are tunable over a broad range at terahertz frequencies. With appropriate structural parameters, simulations show that the axial ratio of reflected electromagnetic wave of the proposed device is lower than 3 dB in the frequency band of 2.25 to 2.475 THz, which means the linearly incident polarization can be converted to the circular polarization wave. The proposed design can also work when the electromagnetic wave is oblique incidence up to 40 deg with a high polarization conversion ratio. Moreover, the operating frequency band can be arbitrarily adjusted by applying a bias voltage. metamaterial; graphene; terahertz waves; polarization converter.
机译：线性到圆形偏振转换器广泛用于光学和微波系统中，但传统材料的偏振装置是可靠的，并且由石墨烯材料制成的装置可以克服这种缺点。设计了基于石墨烯元表面的圆偏振转换器，其特性在太赫兹频率的宽范围内可调。通过适当的结构参数，模拟表明，所提出的装置的反射电磁波的轴向比在2.25至2.475THz的频带中低于3dB，这意味着可以将线性入射极化转换为圆偏振波。当电磁波倾斜入射时，所提出的设计也可以高达40°的高偏振转换比。此外，可以通过施加偏置电压任意调整工作频带。超材料;石墨烯;太赫兹波;极化转换器。

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  • 来源
    《Optical engineering》 |2019年第4期|043106.1-043106.8|共8页
  • 作者

    Chongyun Wang; Ming Chen; Houquan Liu; Chuanxin Teng; Hongchang Deng; Libo Yuan;

  • 作者单位

    Guilin University of Electronic Technology Photonics Research Center Guilin Guangxi China Guangxi Key Laboratory of Precision Navigation Technology and Application Guilin Guangxi China;

    Guilin University of Electronic Technology Photonics Research Center Guilin Guangxi China Guangxi Key Laboratory of Precision Navigation Technology and Application Guilin Guangxi China;

    Guilin University of Electronic Technology Photonics Research Center Guilin Guangxi China;

    Guilin University of Electronic Technology Photonics Research Center Guilin Guangxi China;

    Guilin University of Electronic Technology Photonics Research Center Guilin Guangxi China;

    Guangxi Key Laboratory of Precision Navigation Technology and Application Guilin Guangxi China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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