Absorption coefficient and attenuation of electromagnetic radiation in nanoellipsoidal metal immersed in transparent media

Abstract

The absorption coefficient and attenuation of electromagnetic waves are studied analytically and numerically in a nanoellipsoidal metal dielectric composites. The dielectric constant of nano composite is solved analytically based on quasi-static limit, which assumes that the incorporated nano-ellipsoidal metal particles are very small compared to the light wavelength. In this limit, the scattered light is negligible and absorption is considered. The absorption coefficient of nano ellipsoidal silver in transparent media is studied by varying the geometrical factor and concentration of inclusions. The result shows that the maxima of absorption coefficient shifts towards the higher energy as value of the geometrical factor increases. However, the magnitude of the absorption coefficient decreases with an increment of the value of geometrical factor. Moreover, for a constant geometrical factor the increment in concentration of the nano ellipsoidal silver particles results with decrement of the magnitude of the absorption coefficient.