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research article
Plasmonic Nanofocusing in a Dielectric Wedge
2010
We show that surface plasmon polaritons (SPPs) can be concentrated to subwavelength dimensions in a nanoscale dielectric wedge on a metal substrate. An adiabatic model explains how SPPs propagating on a Ag substrate covered with a thin Si film of slowly increasing thickness become highly confined inside the Si layer. Simulations predict strong subwavelength focusing near the surface plasmon resonance frequency. Unlike alternative strategies, this method does not require the nanoscale shaping of metal surfaces.
Type
research article
Web of Science ID
WOS:000281498200074
Authors
Publication date
2010
Publisher
Published in
Volume
10
Start page
3665
End page
3669
Peer reviewed
REVIEWED
Written at
EPFL
EPFL units
Available on Infoscience
December 16, 2011
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