Probing surface plasmon fields by far-field Raman imaging

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 elastic...

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Bibliographic Details
Published in:	Journal of microscopy (Oxford) Vol. 229; no. 2; pp. 189 - 196
Main Authors:	LAURENT, G, FÉLIDJ, N, GRAND, J, AUBARD, J, LÉVI, G, HOHENAU, A, KRENN, J.R, AUSSENEGG, F.R
Format:	Journal Article
Language:	English
Published:	Oxford, UK Blackwell Publishing Ltd 01-02-2008
Subjects:	Gold structures plasmon raman imaging SERs
Online Access:	Get full text
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Summary:	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.
Bibliography:	http://dx.doi.org/10.1111/j.1365-2818.2008.01885.x ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2
ISSN:	0022-2720 1365-2818
DOI:	10.1111/j.1365-2818.2008.01885.x