Accession Number : ADB144073

Title :   Applications of the Maxwell Garnett Theory to the Spectral Response of Metal/Insulator Composites.

Descriptive Note : Final rept. Apr-Jun 89,

Corporate Author : UNIVERSAL TECHNOLOGY CORP DAYTON OH

Personal Author(s) : Zetts, John S.

Report Date : MAY 1990

Pagination or Media Count : 105

Abstract : The predictions of the Maxwell Garnett theory for the spectral response of metal/insulator composites have been investigated. Analyses have been carried out for the special case of silver (Ag) as the metallic component and for the general case of a metal described by the Drude model. For each case, the predictions of the theory can be reduced to a set of three algebraic expressions for the location, height, and width of the optical absorption bands. For Ag, these expressions for the location, height, and width of the optical absorption bands. For Ag, these expressions yield excellent agreement with the results obtained from numerical calculations using the dielectric function of bulk Ag. For a Drude metal, the corresponding expressions are found to be good approximations when the metal is a good conductor. Subject terms: Maxwell Garnett theory, Effective medium theories, Effective dielectric function, Drude model, Metal/insulator composites, Optical absorption. (jes)

Descriptors :   *COMPOSITE MATERIALS, ABSORPTION, ABSORPTION SPECTRA, ALGEBRAIC FUNCTIONS, BAND SPECTRA, COMPUTATIONS, DIELECTRIC PROPERTIES, METALS, NUMERICAL ANALYSIS, OPTICAL PROPERTIES, PREDICTIONS, RESPONSE, SILVER, SPECTRA, THEORY.

Subject Categories : Laminates and Composite Materials

Distribution Statement : APPROVED FOR PUBLIC RELEASE