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arXiv 1710.03380physics.optics
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利用介电金属晶格的光束控制

Beam steering with dielectric metalattices

Wei Liu, Andrey E. Miroshnichenko

摘要:

我们研究了通过高折射率介电金属晶格在无衍射超颖表面和衍射超颖制度的光波操纵。结果表明,集体晶格耦合可以用来调整所有的电和磁多极子的各种订单支持的每个粒子内的金属晶格的激发效率。这些调整后的多极子的干涉导致高度不对称的角散射模式,这与孤立粒子的散射模式完全不同,从而实现灵活的光束操纵,包括完美的反射,完美的透射和有效的大角度光束转向。晶格耦合和多极干涉之间操纵相互作用的揭示的功能机制可以为超颖表面和超颖的光子分支提供新的启发,这可能会激发许多与光束控制相关的高级应用。

英文摘要:

We study optical wave manipulations through high-index dielectric metalattices in both diffractionless metasurface and diffractive metagrating regimes. It is shown that the collective lattice couplings can be employed to tune the excitation efficiencies of all electric and magnetic multipoles of various orders supported by each particle within the metalattice. The interferences of those adjusted multipoles lead to highly asymmetric angular scattering patterns that are totally different from those of isolated particles, which subsequently enables flexible beam manipulations, including perfect reflection, perfect transmission and efficient large-angle beam steering. The revealed functioning mechanism of manipulated interplays between lattice couplings and multipolar interferences can shed a new light on both photonic branches of metasurfaces and metagratings, which can potentially inspire many advanced applications related to optical beam controls.

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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