Optical reflectivity of aggregated silver surfaces—MG approach

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Abstract
A simple working model is formulated to describe the reflectivity of aggregated Ag surfaces. It is based on the Maxwell Garnett film theory and compared to specially fabricated films representative of rough surfaces. Experimantally determined aggregate dielectric constants are used in the model and point to possible errors in the use of bulk values for such surfaces. Particular aggregated surfaces are shown to correspond closely to surface plasmons. The model is suggested to be applicable to other metals and alloys.