Dispersion relations, stored energy and group velocity for anisotropic electromagnetic media

@article{Kurss1968DispersionRS,
  title={Dispersion relations, stored energy and group velocity for anisotropic electromagnetic media},
  author={Herbert Kurss},
  journal={Quarterly of Applied Mathematics},
  year={1968},
  volume={26},
  pages={373-387}
}
  • H. Kurss
  • Published 1 October 1968
  • Physics
  • Quarterly of Applied Mathematics
The Hermitian and skew-Hermitian components of the susceptibility matrix of a general linear electromagnetic medium are represented as Hilbert transforms of each other. These so-called dispersion relations lead to a priori inequalities which must be satisfied by the susceptibility of a passive medium in a frequency interval in which the medium is lossless. One such inequality states that the stored energy density for a given E(«) and H(ai) is always greater than in free space. This is also… 
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