Abstract
A simple equation for the anisotropic dielectric constant of a metal island film is derived and applied to the ellipsometric measurement for an aggregated silver film. The experimental result can be explained when the inter-island dielectric constant is around unity. It is concluded that, in spite of the theoretical prediction that 2 F ∥+ F ⊥ = 1, the relation 2 F ∥+ F ⊥<1 holds for the observed values of the apparent depolarizing factors for electric fields parallel (F) and perpendicular ( F ⊥) to the substrate surface.
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