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Characterization of nanoplasmonic structures by locally excited photoluminescence

Authors :
Lukas Novotny
Alexandre Bouhelier
Michael R. Beversluis
Source :
Applied Physics Letters. 83:5041-5043
Publication Year :
2003
Publisher :
AIP Publishing, 2003.

Abstract

A method is presented for the characterization of locally enhanced fields at laser-irradiated metal nanostructures. Excitation with 120 fs laser pulses gives rise to photoluminescence mediated by two-photon absorption. A metal tip used to locally scatter the photoluminescence renders a map of regions with high field strengths. Near-field photoluminescence images of particle clusters reveal the dipole nature of the electromagnetic field surrounding the particles. Spectra acquired with and without the presence of the tip show no significant shift of the surface plasmon resonance of the particle clusters, confirming that the tip acts as a passive probe.

Details

ISSN :
10773118 and 00036951
Volume :
83
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........ea1999561eb7d693d35ed4f79a46ea4a
Full Text :
https://doi.org/10.1063/1.1634383