Dresden 2014 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 19: Poster I

MA 19.33: Poster

Dienstag, 1. April 2014, 13:00–15:30, P1

Functional Approach to Electrodynamics in Media — •Ronald Starke — Institut f. theo. Physik, Bergakademie Freiberg

We put forward an approach to classical electrodynamics in media which identifies induced electromagnetic fields as the microscopic counterparts of polarization and magnetization and which systematically employs the mutual functional dependences of induced, external, and total field quantities. This allows for a unified, relativistic description of the electromagnetic response independent of any assumption about the material's possible composition of electric or magnetic dipoles. Using this approach we derive universal relations between electromagnetic response functions which reduce to well-known identities in special cases, but include more generally the effects of inhomogeneity, non-isotropy and relativistic retardation. We further provide general expressions for the constitutive dyadics of bianistropic media in terms of nine causal response functions as represented by the conductivity tensor.