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
收藏
页码：117 / 122
页数：6
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