Propagation length of surface plasmons in a metal film with roughness.
The propagation of laser-excited surface plasmons along a gold film with surface roughness is directly observed via scattered light. The attenuation length of surface plasmons in a broad wavelength interval is calculated for smooth gold and silver films. The surface roughness, which was characterized with an AFM, introduces corrections to the attenuation length, angular dependence of the surface plasmon resonance, and the effective dielectric constant of the metal film. These corrections are also taken into account and discussed.
Kolomenski
Andrei
A
Department of Physics, Texas A&M University, College Station, Texas 77843-4242, USA.
Kolomenskii
Alexandre
A
Noel
John
J
Peng
Siying
S
Schuessler
Hans
H