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Proceedings Paper

Effective dielectric function of metallic particle aggregates
Author(s): Leonid G. Grechko; Vitaly G. Levandovskii; Vladimir M. Ogenko; A. N. Pintchuk
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Paper 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.

Paper Details

Date Published: 28 February 1997
PDF: 8 pages
Proc. SPIE 3055, International Conference on Optical Storage, Imaging, and Transmission of Information, (28 February 1997); doi: 10.1117/12.267697
Show Author Affiliations
Leonid G. Grechko, Institute of Surface Chemistry (Ukraine)
Vitaly G. Levandovskii, Institute of Surface Chemistry (Ukraine)
Vladimir M. Ogenko, Institute of Surface Chemistry (Ukraine)
A. N. Pintchuk, Institute of Surface Chemistry (Ukraine)

Published in SPIE Proceedings Vol. 3055:
International Conference on Optical Storage, Imaging, and Transmission of Information
Viacheslav V. Petrov; Sergei V. Svechnikov, Editor(s)

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