含epsilon-近零超材料的纳米多孔多层材料对电磁波的反射特征

IF 1.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY EPJ Applied Metamaterials Pub Date : 2019-01-01 DOI:10.1051/epjam/2019017
E. Starodubtsev
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引用次数: 5

摘要

利用电磁边界问题的精确解,对纳米多孔多层材料的电磁波反射进行了解析建模。建立了包括基片或近零(ENZ)材料层在内的多层操作的新特征。ENZ主层或衬底的存在导致振幅反射系数的相位和模量随系统参数的快速变化和极值。ENZ(或较厚系统的金属)衬底对反射波的相位差变换有显著影响。对含银或相变材料(锗锑碲合金、二氧化钒)成分的多层膜的所得结果进行了详细的数值分析。考虑的反射特性对于系统参数的变化是相当“稳定”的,例如激发辐射的斜入射(对于TE或TM极化),层的磁性和衬底材料的有效电磁各向异性的可能存在。所得结果可用于开发超薄(具有显著亚波长厚度)的反射辐射相位和振幅变压器、全息图、超表面和其他纳米光子学应用。
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Features of reflection of electromagnetic waves from nanometric perforated multilayers including epsilon-near-zero metamaterials
Using the exact solutions of electromagnetic boundary problems, analytical modeling of reflection of electromagnetic waves from nanometric perforated multilayers has been carried out. New features of operation of the multilayers including the substrate or layers of epsilon-near-zero (ENZ) materials are established. Presence of the ENZ main layer or substrate leads to the quickly changing and extreme values of phase and module of amplitude reflection coefficients depending on the system parameters. The ENZ (or metallic for the thicker systems) substrate has a significant impact on the transformation of phase difference of the reflected waves. The detailed numerical analysis of the obtained results for the multilayers including silver or phase change materials (germanium antimony tellurium alloy, vanadium dioxide) components is performed. The considered reflection characteristics are reasonably “stable” to variation of the system parameters such as oblique incidence of the exciting radiation (for TE or TM polarization), possible presence of magnetic properties of the layers and effective electromagnetic anisotropy of the substrate material. The obtained results can be used to develop ultra-thin (with significantly subwavelength thicknesses) transformers of phase and amplitude of reflected radiation, holograms, metasurfaces and other nanophotonics applications.
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来源期刊
EPJ Applied Metamaterials
EPJ Applied Metamaterials MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.10
自引率
6.20%
发文量
16
审稿时长
8 weeks
期刊最新文献
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