Dark Modes and Fano Resonances in Plasmonic Clusters Excited by Cylindrical Vector Beams

被引：113

作者：

Sancho-Parramon, Jordi ^{[1
,2
]}

Bosch, Salvador ^{[1
]}

机构：

[1] Univ Barcelona, Dept Fis Aplicada & Opt, E-08028 Barcelona, Spain

[2] Rudjer Boskovic Inst, Zagreb 10002, Croatia

来源：

ACS NANO | 2012年 / 6卷 / 09期

关键词：

surface plasmon resonance; cylindrical vector beams; focused illumination; nanoparticle; plasmon hybridization; subradiance; near-field enhancement; Fano resonance; electromagnetic cold spots; OPTICAL-PROPERTIES; NEAR-FIELD; ELECTROMAGNETIC DIFFRACTION; METAL NANOPARTICLES; POLARIZED BEAMS; LIGHT; DIMERS; NANOSTRUCTURES; NANOANTENNAS; NANOCAVITIES;

D O I：

10.1021/nn303243p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Control of the polarization distribution of light allows tailoring the electromagnetic response of plasmonic particles. By rigorously extending the generalized multiparticle Mie theory, we show that focused cylindrical vector beams (CVB) can be used to efficiently excite dark plasmon modes in nanoparticle clusters. In addition to the small radiative damping and large field enhancement associated to dark modes, excitation with CVB can give place to unusual phenomenology like the formation of electromagnetic cold spots and the generation of Fano resonances in highly symmetric clusters. Overall, the results show the potential of CVB to tailor the plasmonic response of nanoparticle clusters in a unique way.

引用

页码：8415 / 8423

页数：9

共 54 条

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