Effective optical constants of evaporated silver and copper island ultrathin films

Abstract

The optical properties of copper and silver island films are quantified in terms of effective optical constants. Knowledge of these effective constants allows straightforward design calculations of island film based multilayer coatings

Thickness Dispersion of Surface Plasmon of Ag Nano-thin Films: Determination by Ellipsometry Iterated with Transmittance Method

“…For an ultrathin metal film in the form of metal islands on a substrate, the dielectric property is in fact that of the mixture of the islands and the embedding dielectric (the air here) and is hence connected with the surface roughness. To simplify the problem a concept of effective optical constants has been introduced within the limits of a homogeneous layer model 16 . Theoretical investigations have also treated heterogeneous media as homogeneous with some effective optical properties 17 18 .…”