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Metamaterial slab as a lens, a cloak, or an intermediate

机译:超材料平板,如透镜,斗篷或中间物

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摘要

We show that a metamaterial slab with arbitrary values of e and μ behaves as a cloak at a finite frequency for a small object located sufficiently close to it due to the suppression of the object's optical excitations by enhanced reflections. Reflections due to propagating components can partially suppress the excitation, while evanescent components can cloak the object completely. In particular, a Veselago slab with e = μ = - 1 + iδ, as well as a class of anisotropic negative refractive index slabs, can completely cloak the small object placed within a finite distance from the slab when δ →0.
机译:我们显示出,对于e或μ任意值的超材料平板,由于其增强反射对物体光学激发的抑制作用,对于位于足够接近它的小物体而言,它在有限频率下表现为斗篷。传播成分引起的反射可以部分抑制激发,而while逝成分则可以完全掩盖物体。特别是,当δ→0时,具有e =μ=-1 +iδ的Veselago平板以及一类各向异性的负折射率平板可以完全掩盖放置在距平板有限距离内的小物体。

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  • 来源
    《Physical review》 |2011年第11期|p.115124.1-115124.7|共7页
  • 作者单位

    State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, China,Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China;

    Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China;

    Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China;

    State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, China;

    Department of Physics, The Hong Kong University of Science and Technology, Hong Kong, China;

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

    electromagnetic wave propagation; radiowave propagation; optical elements, devices, and systems;

    机译:电磁波传播无线电波传播;光学元件;设备和系统;

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