Title: Electromagnetic field energy in an absorptive medium with temporal and spatial dispersion
Author(s):

	A.G. Zagorodny (Bogolyubov Institute for Theoretical Physics of the National Academy of Sciences of Ukraine, 14-b Metrolohichna St., 03680 Kyiv, Ukraine) ,
	S.A. Trigger (Joint Institute for High Temperatures, Russian Academy of Sciences, 13 Izhorskaya St., Bd. 2, 125412 Moscow, Russia) ,
	A.I. Momot (Taras Shevchenko National University of Kyiv, 64/13 Volodymyrs'ka St., 01601 Kyiv, Ukraine)

General relations for electromagnetic field energy outside the transparency domain are proposed. It is shown that charged particle contribution to the energy of electromagnetic perturbations in the general case can be described in terms of a bilinear combination of the dielectric polarizability of the medium. The explicit form of such contribution is found. The relations obtained are used to generalize the Planck law to the case of an absorptive medium.

Key words: absorptive medium, temporal and spatial dispersion, electromagnetic field energy

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