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2.7 Classification of Bianisotropic Media
ОглавлениеIt is sometimes convenient to classify bianisotropic media in terms of their tensorial constitutive parameters. For this purpose, we split the susceptibility tensors and into a tensor, , related to nonreciprocity, and a tensor, , related to chirality [148], as
(2.85)
Table 2.3 classifies the reciprocal ( and ) and nonreciprocal ( and ) bianisotropic media depending on whether the tensors or are diagonal or not, and symmetric or antisymmetric, respectively. This classification relies on the fact that an arbitrary tensor , which may represent either (for a reciprocal medium) or (for a nonreciprocal medium), can be decomposed as
(2.86)
Table 2.3 Classification of bianisotropic media [148].
| Type | Parameters | Medium |
|---|---|---|
| Reciprocal | Omega | |
| Pseudochiral | ||
| Pseudochiral omega | ||
| Pasteur (or biisotropic) | ||
| Chiral omega | ||
| Anisotropic chiral | ||
| General reciprocal | ||
| Nonreciprocal | Moving | |
| Pseudo Tellegen | ||
| Moving pseudo Tellegen | ||
| Tellegen | ||
| Moving Tellegen | ||
| Anisotropic Tellegen | ||
| Nonreciprocal nonchiral |
where is a diagonal tensor and is a traceless tensor that can be further split into a symmetric part, , and an antisymmetric part, , where
(2.87)
such that (2.86) becomes
(2.88)
