Electrodynamics of Conducting Dispersive Media by Babak Shokri & Anri A. Rukhadze

Author:Babak Shokri & Anri A. Rukhadze
Language: eng
Format: epub
ISBN: 9783030289683
Publisher: Springer International Publishing

(3.43)

(3.44)

where

In addition, it must also be noticed that and g″ in Eqs. (3.43) and (3.44) are functions of n′(ω); moreover, the anti-Hermitian part of the dielectric tensor is a function only of the real part of .

Using absorption coefficients given by Eqs. (3.43)–(3.45), one can calculate the damping decrements of waves. For longitudinal waves, the expression of damping decrement is relatively simple

(3.45)

In this expression, all corrections stipulated by spatial dispersion, i.e., the terms of ~ηij are neglected. Analogous expressions in the case of arbitrary propagation angle ϑ become unwieldy for the ordinary and extraordinary waves. However, they become relatively simple in the limits ϑ = 0 and ϑ = π/2. For example, when ϑ = 0, and spatial dispersion is neglected, the refractive indexes of these waves are given by Eq. (3.25).

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