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Efficient Coupling to Plasmonic Multipole Resonances by Using a Multipolar Incident Field
ACS Photonics ( IF 6.5 ) Pub Date : 2018-02-26 00:00:00 , DOI: 10.1021/acsphotonics.7b01426
David Becerril 1 , Humberto Batiz 1 , Giuseppe Pirruccio 1 , Cecilia Noguez 1
Affiliation  

A method to manipulate the multipolar plasmonic response of a nanostructure in the quasi-static limit is introduced. The theoretical method puts on the same footing geometry, dielectric properties, and incident field and proceeds in two steps: it optimizes the geometry of the nanostructure to maximize the intensity of the scattering cross-section spectrum. This is done by calculating the coupling strengths of the different modes of the system to the external field, which the method naturally provides. Then, it exploits the symmetry of the incident electromagnetic field to enhance or suppress specific orders, which, in turn, tunes the field enhancement. We demonstrate the method by using a plasmonic dimer of nanospheres.

中文翻译:

通过使用多极入射场有效耦合到等离激元多极共振。

介绍了一种在准静态极限下操纵纳米结构的多极等离子体响应的方法。该理论方法具有相同的立足点几何形状,介电特性和入射场,并且分两步进行:它优化了纳米结构的几何形状,以最大化散射截面光谱的强度。这是通过计算该方法自然提供的系统不同模式与外部场的耦合强度来完成的。然后,它利用入射电磁场的对称性来增强或抑制特定阶次,进而调整场强。我们通过使用纳米球体的等离子体二聚体证明了该方法。
更新日期:2018-02-26
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