Abstract
The optical properties of multi-metal nanocomposites made from Cobalt (Co), and Silver (Ag) are analyzed theoretically within the mean field approximation, and experimentally verified using absorption spectroscopy. The experimental system was modeled as a thin layer composed of hemispherical nanoparticles formed by grains of Co and Ag in contact with air and the SiO\(_{\text{2}}\) substrate. The main aspects of the absorption curve, such as the shape and spectral location of the localized surface plasmon resonance, are well captured by a simple self-consistent mixing model using a modified Maxwell-Garnett approach and the Milton lower bound.
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