Tailoring the excitation of localized surface plasmon-polariton resonances by focusing radially-polarized beams

被引：46

作者：

Mojarad, Nassiredin M. ^{[1
]}

Agio, Mario ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Phys Chem Lab, Nanoopt Grp, CH-8093 Zurich, Switzerland

来源：

OPTICS EXPRESS | 2009年 / 17卷 / 01期

关键词：

ELECTROMAGNETIC DIFFRACTION; AU NANOPARTICLES; OPTICAL-SYSTEMS; SCATTERING; MICROSCOPY; PARTICLES; MODES; LIGHT; FIELD;

D O I：

10.1364/OE.17.000117

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the interaction of focused radially-polarized light with metal nanospheres. By expanding the electromagnetic field in terms of multipoles, we gain insight on the excitation of localized surface plasmon-polariton resonances in the nanoparticle. We show that focused radially-polarized beams offer more opportunities than a focused plane wave or a Gaussian beam for tuning the near- and far-field system response. These results find applications in nano-optics, optical tweezers, and optical data storage. (C) 2008 Optical Society of America

引用

页码：117 / 122

页数：6

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