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arXiv 1609.01099physics.optics
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纳米光子学中的多极干涉效应

Multipolar interference effects in nanophotonics

Wei Liu, Yuri S. Kivshar

摘要:

任意纳米级物体对电磁波的散射可以通过电磁场的多极分解来表征,该多极分解允许通过主导激发多极模式的干涉来描述散射强度和辐射图案。在现代纳米光子学中,多极模式的产生和干涉开始发挥不可或缺的作用,它们使光的纳米操纵与许多相关的应用成为可能。在这里,我们回顾了金属,金属-电介质和电介质纳米结构中的多极干涉效应,并对涉及电,磁和环形多极干涉的许多现象提出了全面的看法,这些现象驱动了一些最近讨论的纳米光子学效应,如单向散射,有效光学反铁磁性,具有受控角图案的广义Kerker散射,广义Brewster角,和非辐射光学反射极。我们进一步讨论了其他类型的可能的多极干涉效应尚未在文献中利用,并设想通过全相位和振幅工程多极干涉的概念,实现更灵活和先进的纳米级光控制的前景。

英文摘要:

Scattering of electromagnetic waves by an arbitrary nanoscale object can be characterized by a multipole decomposition of the electromagnetic field that allows to describe the scattering intensity and radiation pattern through interferences of dominating excited multipole modes. In modern nanophotonics, both generation and interference of multipole modes start to play an indispensable role, and they enable nanoscale manipulation of light with many related applications. Here we review the multipolar interference effects in metallic, metal-dielectric, and dielectric nanostructures, and suggest a comprehensive view on many phenomena involving the interferences of electric, magnetic and toroidal multipoles, which drive a number of recently discussed effects in nanophotonics such as unidirectional scattering, effective optical antiferromagnetism, generalized Kerker scattering with controlled angular patterns, generalized Brewster angle, and nonradiating optical anapoles. We further discuss other types of possible multipolar interference effects not yet exploited in literature and envisage the prospect of achieving more flexible and advanced nanoscale control of light relying on the concepts of multipolar interference through full phase and amplitude engineering.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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