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Ultrafast all-optical coupling of light to surface plasmon polaritons on plain metal surfaces.

Authors
  • Rotenberg, Nir
  • Betz, Markus
  • van Driel, Henry M
Type
Published Article
Journal
Physical Review Letters
Publisher
American Physical Society
Publication Date
Jul 02, 2010
Volume
105
Issue
1
Pages
17402–17402
Identifiers
PMID: 20867475
Source
Medline
License
Unknown

Abstract

We propose and demonstrate an ultrafast all-optical method to couple light to surface plasmon polaritons on planar gold films. By interfering two 150 fs, 810 nm pulses we excite a transient grating in the temperature of the free electrons of the metal, resulting in a grating in the dielectric function, and leading to a 1 ps launch window for plasmonic excitation. We use pump-probe experiments to identify these ultrashort plasmonic excitations between 520 and 570 nm.

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