Abstract
Scattering of surface plasmon polaritons on rough metal surfaces
is investigated by using scanning near-field optical microscopy.
Different scattering regimes, i.e. single, double and multiple
scattering, are observed and related to the spatial Fourier
spectra of the corresponding near-field optical images. For the
regime of strong multiple scattering, the near-field optical
images exhibit spatially localized (within 150-250 nm) intensity
enhancement by 10-50 times. This feature is attributed to strong
localization of surface polaritons due to interference effects in
multiple scattering caused by surface roughness. Similar bright
light spots are observed with light scattering by silver colloid
clusters deposited on glass substrates. Differences and
similarities in these scattering phenomena are discussed.
| Original language | English |
|---|---|
| Journal | Annalen der Physik |
| Volume | 8 |
| Issue number | 7-9 |
| Pages (from-to) | 717-726 |
| Publication status | Published - 1999 |