Effective dielectric function of metallic particle aggregates

Leonid G. Grechko; Vitaly G. Levandovskii; Vladimir M. Ogenko; A. N. Pintchuk

doi:10.1117/12.267697

28 February 1997 Effective dielectric function of metallic particle aggregates

Leonid G. Grechko, Vitaly G. Levandovskii, Vladimir M. Ogenko, A. N. Pintchuk

Proceedings Volume 3055, International Conference on Optical Storage, Imaging, and Transmission of Information; (1997) https://doi.org/10.1117/12.267697
Event: International Conference on Optical Storage, 1996, Kiev, Ukraine

Abstract

An infrared and visible absorption spectra of aggregates with metallic spherical particles (size of about 10 - 30 nm) in dielectric matrix are theoretically studied. Calculations of the effective dielectric constant of such systems have been carried out in electrostatical approximation by considering the concentration expansion up to second power of f(f is a volume fraction occupied by spheres) with the pair multiple interaction induced by external field been taken into account exactly. We have found that the frequency dependencies of an imaginary part of dielectric function and absorption coefficient in plasma resonance region for a single particle have two peaks that are shifted into longwave and shortwave frequency regions in relation to the known Lorrentzian absorption peak corresponding to the dipolar surface plasma mode of isolated spheres.

Citation Download Citation

Leonid G. Grechko, Vitaly G. Levandovskii, Vladimir M. Ogenko, and A. N. Pintchuk "Effective dielectric function of metallic particle aggregates", Proc. SPIE 3055, International Conference on Optical Storage, Imaging, and Transmission of Information, (28 February 1997); https://doi.org/10.1117/12.267697

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