Abstract
The anisotropic optical properties of obliquely evaporated nickel films were deduced from observations of the surface plasmon resonance at 3.391 microm wavelength. Using the attenuated total reflection technique the radiation was coupled through an air-gap to nickel films deposited at different angles of condensation. For each nickel film, experimental data were recorded in the form of reflectivity against angle of incidence for two orthogonal geometries. For one, the direction of condensation lies in the plane of incidence, and for the other, it lies in the plane perpendicular to the plane of incidence. Fitting the recorded data to the predictions of Fresnel theory with an anisotropic permittivity tensor allowed the evaluation of this tensor. Then, using the determined tensor with Bruggeman's effective medium theory, the surface profile, depolarization factor and volume composition were deduced. The results obtained are discussed in the light of our knowledge of such a system.
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