We study radiative energy transfer between a donor-acceptor pair across a
hyperbolic metamaterial slab. We show that similar to a perfect lens a
hyperbolic lens allows for giant energy transfer rates. For a realistic
realization of a hyperbolic multilayer metamaterial we find an enhancement of
up to three orders of magnitude with respect to the transfer rates across a
plasmonic silver film of the same size especially for frequencies which
coincide with the epsilon-near zero and the epsilonnear pole frequencies.
Furthermore, we compare exact results based on the S-matrix method with results
obtained from effective medium theory. Our finding of very large dipole-dipole
interaction at distances of the order of a wavelength has important
consequences for producing radiative heat transfer, quantum entanglement etc