New perspective on the reciprocity theorem of classical electrodynamics

作者：Mansuripur Masud^*; Tsai Din Ping

来源：Optics Communications, 2011, 284(3): 707-714.

DOI：10.1016/j.optcom.2010.09.077

We provide a simple physical proof of the reciprocity theorem of classical electrodynamics in the general case of material media that contain linearly polarizable as well as linearly magnetizable substances The excitation source is taken to be a point-dipole either electric or magnetic and the monitored field at the observation point can be electric or magnetic regardless of the nature of the source dipole The electric and magnetic susceptibility tensors of the material system may vary from point to point in space but they cannot be functions of time In the case of spatially non-dispersive media the only other constraint on the local susceptibility tensors is that they be symmetric at each and every point The proof is readily extended to media that exhibit spatial dispersion For reciprocity to hold the electric susceptibility tensor X(E_mn) that relates the complex-valued magnitude of the electric dipole at location r(m) to the strength of the electric

• 出版日期2011-2-1