Abstract
The reflection ( R) of light at rough gold films has been measured in the region of surface plasmon (SP) excitation and compared with a smooth gold film. The SP resonance minima are shifted to larger wavevectors and their halfwidth is enlarged with increasing surface roughness. Different positions of the reflection minima were observed measuring R(Θ) at constant wavelength λ, and measuring R(λ) at constant angle of incidence Θ. The calculated values prove this observation.
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