Physics – Optics
Scientific paper
2006-06-17
Proc. R. Soc. A (2007) 463, 397-418
Physics
Optics
Scientific paper
10.1098/rspa.2006.1770
A medium which is an isotropic chiral medium from the perspective of a co-moving observer is a Faraday chiral medium (FCM) from the perspective of a non-co-moving observer. The Tellegen constitutive relations for this FCM are established. By an extension of the Beltrami field concept, these constitutive relations are exploited to show that planewave propagation is characterized by four generally independent wavenumbers. This FCM can support negative phase velocity at certain translational velocities and with certain wavevectors, even though the corresponding isotropic chiral medium does not. The constitutive relations and Beltrami--like fields are also used to develop a convenient spectral representation of the dyadic Green functions for the FCM.
Lakhtakia Akhlesh
Mackay Tom G.
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