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Plasmonic enhancement of spatial dispersion effects in prism coupler experiments

机译:等离子增强棱镜耦合器实验中空间色散效应

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摘要

Recent experiments with film-coupled nanoparticles suggest that the impact of spatial dispersion is enhanced in plasmonic structures where high wave-vector guided modes are excited. More advanced descriptions of the optical response of metals than Drude's are thus probably necessary in plasmonics. We show that even in classical prism coupler experiments, the plasmonic enhancement of spatial dispersion can be leveraged to make such experiments two orders of magnitude more sensitive. The realistic multilayered structures involved rely on layers that are thick enough to rule our any other phenomenon as the spill-out. Optical evanescent excitation of plasmonic wave guides using prism couplers thus constitutes an ideal platform to study spatial dispersion.
机译:薄膜耦合纳米粒子的最新实验表明,在高波矢引导模式被激发的等离子体结构中,空间色散的影响得到了增强。因此,在等离激元学中可能需要比Drude更高级的金属光学响应描述。我们表明,即使在经典的棱镜耦合器实验中,也可以利用等离激元增强空间色散来使此类实验更加敏感两个数量级。涉及的逼真的多层结构依赖于足够厚的层,以控制我们出现的任何其他现象,即溢出现象。因此,使用棱镜耦合器的等离激元波导的e逝光激发是研究空间色散的理想平台。

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  • 来源
    《Physical review》 |2018年第12期|125418.1-125418.5|共5页
  • 作者单位

    Universite Clermont Auvergne, CNRS, Institut Pascal, 63000 Clermont-Ferrand, France;

    Universite Clermont Auvergne, CNRS, Institut Pascal, 63000 Clermont-Ferrand, France;

    Universite Clermont Auvergne, CNRS, Institut Pascal, 63000 Clermont-Ferrand, France;

    Universite Clermont Auvergne, CNRS, Institut Pascal, 63000 Clermont-Ferrand, France;

    Universite Clermont Auvergne, CNRS, Institut Pascal, 63000 Clermont-Ferrand, France;

    Universite Clermont Auvergne, CNRS, Institut Pascal, 63000 Clermont-Ferrand, France;

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