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Power-energy relations of electrodynamics for space-dispersive active media

Published online by Cambridge University Press:  14 May 2003

A. A. Barybin
A. A. Barybin*
Affiliation:
Electronics Department, Electrotechnical University, Saint Petersburg, 197376, Russia
*
barybin@mail.ru
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Abstract

A known electrodynamic approach is generalized to guided-wave structuresusing a hypothetical space-dispersive medium with drifting charge carriersand simultaneously possessing elastic, piezoelectric, and magneticproperties. On the basis of Maxwell's equations along with the appropriateequations of medium motion, the power-energy theorem is derived in thegeneral form involving additional contributions from specific propertiesof the medium. The general power-energy relation yields particularexpressions obtained previously for specific cases of the elasticpiezo-dielectrics, magnetized ferrites, and drifting charge carriers innondegenerate plasmas. Substantial features of our electrodynamic studyare the allowance for medium losses and the separation of potential fieldspeculiar to the slow quasi-static waves which propagate in such activemedia independently of the fast electromagnetic waves of curl nature.Separating the potential fields gives a certain modification ofelectromagnetic terms in the power-energy theorem.

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Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 22 , Issue 3 , June 2003 , pp. 189 - 205
Copyright
© EDP Sciences, 2003

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