Onsager-Casimir principle and reciprocity relations for bianisotropic media

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Abstract

To use the general reciprocity theorem for bianisotropic media, the physical basis should be established. There is the Onsager-Casimir principle that shows how the time-reversal invariance of microscopic equations of motion gives certain relations for macroscopic susceptibilities of a causal linear bianisotropic medium. In this paper, we show that in a general case of a bianisotropic medium, the Onsager-Casimir principle is not the same as the Lorentz reciprocity. We discuss the fact that one cannot use the Onsager-Casimir principle to "ensure the physicality" of the known microwave chiral and Ω-media. At the same time, we show that the Onsager-Casimir principle is applicable to new particulate bianisotropic composites - the MCBMs. The MCBMs give an example of nonreciprocal bianisotropic media with dynamical constitutive symmetry.

Original languageEnglish
Pages (from-to)412-416
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume19
Issue number6
DOIs
StatePublished - 1 Jan 1998
Externally publishedYes

Keywords

  • Bianisotropic media
  • Generalized susceptibility
  • Kinetic coefficient symmetry
  • Lorentz reciprocity
  • Nonreciprocal bianisotropic materials

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