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Planar hyperlens based on a modulated graphene monolayer

机译:基于调制石墨烯单层的平面超透镜

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摘要

The canalization of terahertz surface plasmon polaritons using a modulated graphene monoiayer is investigated for subwavelength imaging. An anisotropic surface conductivity formed by a set of parallel nanoribbons with alternating positive and negative imaginary conductivities is used to realize the canalization regime required for hyperlensing. The ribbons are narrow compared to the wavelength and are created electronically by gating a graphene layer over a corrugated ground plane. Good quality canalization of surface plasmon polaritons is shown in the terahertz even in the presence of realistic loss in graphene, with relevant implications for subwavelength imaging applications.
机译:太赫兹表面等离子体激元极化子使用调制的石墨烯单层的渠道进行了研究亚波长成像。由一组具有交替的正和负假想电导率的平行纳米带形成的各向异性表面电导率可用于实现超透镜所需的渠化方案。与波长相比,色带较窄,通过在波纹状接地平面上浇注石墨烯层以电子方式产生。即使在石墨烯中存在实际损耗的情况下,在太赫兹中也显示出表面等离振子极化子的高质量渠化,​​这对亚波长成像应用具有相关意义。

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  • 来源
    《Physical review》 |2014年第8期|081410.1-081410.5|共5页
  • 作者单位

    Department of Electrical Engineering, University of Wisconsin-Milwaukee, 3,200 N. Cramer St., Milwaukee, Wisconsin 53211, USA;

    Department of Electrical Engineering, University of Wisconsin-Milwaukee, 3,200 N. Cramer St., Milwaukee, Wisconsin 53211, USA;

    Center for Applied Electromagnetic Systems Research (CAESR), Department of Electrical Engineering, University of Mississippi, University, Mississippi 38677, 1848, USA;

    Department of Electrical and Computer Engineering, University of Texas at Austin, Austin, Texas 78712, USA;

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  • 正文语种 eng
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  • 关键词

    collective excitations (including excitons, polarons, plasmons and other charge-density excitations);

    机译:集体激发(包括激子;极化子;等离激元和其他电荷密度激发);

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