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Toward tunable light propagation and emission in thin nanostructured plasmonic waveguides

Authors :
Fabrice Pardo
Jean-Luc Pelouard
Stéphane Collin
Cyrille Billaudeau
Nathalie Bardou
Source :
Applied Physics Letters. 92:041111
Publication Year :
2008
Publisher :
AIP Publishing, 2008.

Abstract

High-resolution angle-resolved transmission measurements are carried out through nanostructured plasmonic waveguides made of thin gold films with very narrow slits deposited on GaAs substrates. They reveal transmission intensity modulations along the air/metal surface plasmon band, due to the presence of metal/substrate surface modes. Two propagation regimes have been identified. In this plasmonic waveguide, the radiative emission can be enhanced or inhibited by a slight modification of the refractive index of the substrate (δn∕n≃1%), allowing to control the propagation regime of surface plasmon waves along the air/metal interface.

Details

ISSN :
10773118 and 00036951
Volume :
92
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........de956cd0ed1490adce6d705092271917
Full Text :
https://doi.org/10.1063/1.2838348