“…Indeed, in general the usual form of the Poynting vector, S = E × H, does not hold in the case of spatially dispersive materials. 24,25 Moreover, there is no known theory to determine the Poynting vector in a general spatially dispersive material, and the only case that is actually understood, and for which closed analytical formulas are available, is when the electromagnetic fields have a spatial variation of the form e −j k·r (plane waves). 24 In this work, we derive closed analytical formulas that enable calculating explicitly the Poynting vector and the electromagnetic energy density in uniaxial wire media for arbitrary electromagnetic field distributions.…”