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首页> 外文期刊>Nanotechnology >Multiband and broadband active controllable terahertz absorption in dual-side grating-gate graphene field-effect transistors
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Multiband and broadband active controllable terahertz absorption in dual-side grating-gate graphene field-effect transistors

机译：双侧光栅栅极石墨烯场效应晶体管中的多频带和宽带主动可控太赫兹吸收

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摘要

We show that the even order ungated modes can be excited under normal incidence while the odd order ungated modes cannot in traditional single-side grating-gate graphene field-effect transistors. The odd order ungated modes will suppress the excitation efficiency of the gated modes. In order to realize multiband detection by effectively exciting the higher order gated modes, the frequency of the 1st order ungated mode should be tuned up, which can be realized by shortening the length of the ungated region. We propose to use the dual-side grating-gate structure to shorten the length of the ungated region. Gated mode up to 21st order can be realized in complementary dual-side grating-gate structure. The ultra-multiband absorption can be actively controlled to cover 1.06-10 THz when the graphene Fermi energy is tuned from 0.2 eV to 0.6 eV. Even order gated modes will be excited by gradually overlapping the two grating layers because of the break of symmetry. Broadband detection from 0.1-8.2 THz can be realized by the effective excitation and overlap of the odd and even order gated modes.
机译：我们表明，偶数订单不经常模式可以在正常入射时振奋，而奇数订单未经常模式不能在传统的单侧光栅栅极石墨烯场效应晶体管中。奇数订单未经常模式将抑制门控模式的激励效率。为了通过有效地激发更高阶门控模式来实现多频段检测，应通过缩短未缩短的区域的长度来调整第一订单未经过识别模式的频率。我们建议使用双侧光栅栅极结构来缩短未赘述。在互补的双侧光栅栅极结构中可以实现高达21个订单的门控模式。当石墨烯Fermi能量从0.2EV调谐到0.6eV时，可以主动控制超多频带吸收以覆盖1.06-10THz。由于断裂对称性，通过逐渐与两个光栅层逐渐重叠，均匀令人源于顺序所令人兴奋的模式。从0.1-8.2 THz的宽带检测可以通过奇数甚至阶阶门控模式的有效激励和重叠来实现。

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  • 来源
    《Nanotechnology》 |2020年第28期|共7页
  • 作者

    Yu Anqi; Guo Xuguang; Balakin Alexei V; Shkurinov Alexander P.; Zhu YiMing;

  • 作者单位

    Univ Shanghai Sci &

    Technol Terahertz Technol Innovat Res Inst Terahertz Spectrum &

    Imaging Technol Cooperat Inn Shanghai Key Lab Modern Opt Syst 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Terahertz Technol Innovat Res Inst Terahertz Spectrum &

    Imaging Technol Cooperat Inn Shanghai Key Lab Modern Opt Syst 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Terahertz Technol Innovat Res Inst Terahertz Spectrum &

    Imaging Technol Cooperat Inn Shanghai Key Lab Modern Opt Syst 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Terahertz Technol Innovat Res Inst Terahertz Spectrum &

    Imaging Technol Cooperat Inn Shanghai Key Lab Modern Opt Syst 516 Jungong Rd Shanghai 200093 Peoples R China;

    Univ Shanghai Sci &

    Technol Terahertz Technol Innovat Res Inst Terahertz Spectrum &

    Imaging Technol Cooperat Inn Shanghai Key Lab Modern Opt Syst 516 Jungong Rd Shanghai 200093 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    graphene; plasmon; terahertz detector;

    机译：石墨烯;等离子体;太赫兹探测器;

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