Probing surface plasmon fields by far-field Raman imaging

被引：14
|
作者：
Laurent, G. [1 ]
Felidj, N. [1 ]
Grand, J. [1 ]
Aubard, J. [1 ]
Levi, G. [1 ]
Hohenau, A. [2 ]
Krenn, J. R. [2 ]
Aussenegg, F. R. [2 ]
机构：
[1] Univ Paris 07, Lab ITODYS, CNRS, UMR 7086, F-75005 Paris, France
[2] Karl Franzens Univ Graz, Inst Phys, A-8010 Graz, Austria
来源：
JOURNAL OF MICROSCOPY-OXFORD | 2008年 / 229卷 / 02期
关键词：
gold structures; plasmon; Raman imaging; SERs;
D O I：
10.1111/j.1365-2818.2008.01885.x
中图分类号：
TH742 [显微镜];
学科分类号：
摘要：
This article reports on the imaging of the surface plasmon fields of lithographically designed micrometre-sized gold structures. We investigate rings made of disk-shaped particles and individual crescent-shaped particles. These structures are imaged with two techniques, dark field imaging of elastically scattered light and imaging the surface-enhanced Raman scattering signal of methylene blue dye adsorbed onto the structures. Although elastically scattered light images result from the coherently summed contributions from all elementary scattering volumes, surface-enhanced Raman scattering images reflect the optical near-field intensity incoherently averaged over a surface area corresponding to the spatial resolution of the microscope objective. The combination of both imaging methods enables us to emphasize the role of plasmon coupling and antenna effect in the surface-enhanced Raman scattering enhancement.
引用
收藏
页码：189 / 196
页数：8
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