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arXiv 2007.13317physics.optics
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紫外-可见光谱范围内的等离子体晶格Kerker效应

Plasmonic lattice Kerker effect in UV-Vis spectral range

V. S. Gerasimov, A. E. Ershov, R. G. Bikbaev, I. L. Rasskazov, I. L. Isaev, P. N. Semina, A. S. Kostyukov, V. I. Zakomirnyi, S. P. Polyutov, S. V. Karpov

摘要:

Kerker效应在大多数情况下被遗弃,但在全介电纳米光子学出现后又重新出现,可以在具有强电磁Mie共振的高折射率成分的各种纳米结构中观察到Kerker效应。存在磁响应的必要要求限制了通常非磁性的常规等离子体纳米结构用于Kerker效应。尽管如此,我们在这里展示了第一次出现的晶格Kerker效应在规则的等离子体Al纳米结构。由于电偶极和磁偶极以及电四极和磁四极的Rayleigh异常与局部表面等离子体共振之间的微妙相互作用而产生的集体晶格振荡导致了宽光谱范围内反向散射的抑制。Al阵列的几何参数的变化允许在整个UV和可见光波长范围内定制晶格Kerker效应,这几乎不可能使用其他等离子体或全介电材料实现。有人认为,我们的研究结果奠定了广泛的分歧,在等离子体和进一步应用的Kerker效应。

英文摘要:

Mostly forsaken, but revived after the emergence of all-dielectric nanophotonics, the Kerker effect can be observed in a variety of nanostructures from high-index constituents with strong electric and magnetic Mie resonances. Necessary requirement for the existence of a magnetic response limits the use of generally non-magnetic conventional plasmonic nanostructures for the Kerker effect. In spite of this, we demonstrate here for the first time the emergence of the lattice Kerker effect in regular plasmonic Al nanostructures. Collective lattice oscillations emerging from delicate interplay between Rayleigh anomalies and localized surface plasmon resonances both of electric and magnetic dipoles, and electric and magnetic quadrupoles result in suppression of the backscattering in a broad spectral range. Variation of geometrical parameters of Al arrays allows for tailoring lattice Kerker effect throughout UV and visible wavelength ranges, which is close to impossible to achieve using other plasmonic or all-dielectric materials. It is argued that our results set the ground for wide ramifications in the plasmonics and further application of the Kerker effect.

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