Radiation from a dipole perpendicular to the interface between two planar semi-infinite magnetoelectric media


  • O. J. Franca Institut für Physik, Universität Kasel
  • Luis Fernando Urrutia Instituto de Ciencias Nucleares, UNAM.




Magnetoelectric effect, dipole radiation, electromagnetic wave propagation


We consider two semi-infinite magnetoelectric media with constant dielectric permittivity separated by a planar interface, whose electromagnetic response is described by non-dynamical axion electrodynamics and investigate the radiation of a point-like electric dipole located perpendicularly to the interface. We start from the exact Green's function for the electromagnetic potential, whose far-field approximation is obtained using a modified steepest descent approximation. We compute  the angular distribution of the radiation and the total radiated power finding different interference patterns, depending on the relative position dipole-observer, and polarization mixing effects which are all absent in the standard dipole radiation. They are a manifestation of the magnetoelectric effect induced by axion electrodynamics. We illustrate our findings with some numerical estimations employing realistic media as well as some hypothetical choices in order to illuminate the effects of the magnetoelectric coupling which is usually very small.


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How to Cite

O. J. Franca and L. F. Urrutia, “Radiation from a dipole perpendicular to the interface between two planar semi-infinite magnetoelectric media”, Rev. Mex. Fís., vol. 68, no. 6 Nov-Dec, pp. 060701 1–, Nov. 2022.



07 Gravitation, Mathematical Physics and Field Theory