A Maxwell Garnett Model for Dielectric Mixtures Containing Conducting Particles at Optical Frequencies

Abstract

Mathematical modeling of composites made of a dielectric base and randomly oriented metal inclusions is considered. Different sources of frequency-dependent metal conductivity at optical frequencies are taken into account. These include the skin-effect, dimensional (length-size) resonance of metal particles, and the Drude model. Also, the mean free path of electrons in metals can be smaller than the characteristic sizes of nanoparticles, and this leads to the decrease in conductivity of the metal inclusions. These effects are incorporated in the Maxwell Garnett mixing formulation, and give degrees of freedom for forming desirable optical frequency characteristics of composite media containing conducting particles.

Department(s)

Electrical and Computer Engineering

Second Department

Materials Science and Engineering

Sponsor(s)

Air Force Research Laboratory (Wright-Patterson Air Force Base, Ohio)
Univeristy of Missouri--Rolla. Center for Advanced Materials Technology

Keywords and Phrases

Conductivity; Dielectric Base; Mathematical Modeling; Metal Inclusions

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2006 Electromagnetics Academy - EMW Publishing, All rights reserved.

Publication Date

01 Jan 2006

Link to Full Text

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