Silver columnar thin films (CTFs) are grown by thermal evaporation combined with
oblique-angle-deposition technique (OAD). The optical and structural properties of
metal silver films are related to their microstructures. The surface roughness, produced
during the deposition of silver metal, enables the plasmon surface wave coupling the
electromagnetic light. Properties, that are interesting for several applications are found.
These properties are related to the shadowing effect, films thickness and localised
surface-plasmon resonance. Fundamental results related to the transition from
continuous, semi-continuous to discontinuous metal films are also presented.
Analyses of the top-surface morphology of columnar thin films (CTFs) of silver, grown by a
combination of the usual oblique-angle-deposition technique with very fast substrate rotation,
confirm that silver CTFs consist of more isolated and quasiperiodically distributed nanowires
for higher vapor incidence angle during deposition. The top surfaces then are well-suited for
the exploitation of surface-enhanced Raman scattering and localized surface-plasmon