Abstract
Using the Maxwell-Garnett model, a complex effective index of refraction of a matrix metal-dielectric composite medium with silver inclusions of spheroidal shape is investigated. A possibility of observing the unit refractive index in the visible spectral region is shown, with the effective absorption coefficient being less than 0.1. The results of analytical calculations based on the electrodynamic Maxwell-Garnett model are compared with those obtained by an exact electrodynamic calculation.
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