Excitation Theory for Space-Dispersive Active Media Waveguides
Abstract
A unified electrodynamic approach to the guided-wave excitation theory is generalized to the waveguiding structures containing a hypothetical space-dispersive medium with drifting charge carriers possessing simultaneously elastic, piezoelectric and magnetic properties. Substantial features of our electrodynamic approach are: (i) the allowance for medium losses and (ii) the separation of potential fields peculiar to the slow quasi-static waves. It is shown that the orthogonal complementary fields appearing inside the external source region are just associated with a contribution of the potential fields inherent in exciting sources. Taking account of medium losses converts the usual orthogonality relation into a novel form called the quasi-orthogonality relation. It is found that the separation of potential fields reveals the fine structure of interaction between the exciting sources and mode eigenfields: in addition to the exciting currents interacting with the curl fields, the exciting charges and the double charge (surface dipole) layers appear to interact with the quasi-static potentials and the displacement currents, respectively.
Cite
@article{arxiv.physics/9908057,
title = {Excitation Theory for Space-Dispersive Active Media Waveguides},
author = {A. A. Barybin},
journal= {arXiv preprint arXiv:physics/9908057},
year = {2009}
}
Comments
LaTeX 2.09, 28 pages with mathematical appendix