  The high density of evanescent modes in the vicinity of a metal leads to
enhancement of the near-field F\"{o}rster resonant energy transfer (FRET) rate.
We present a classical approach to calculate the FRET rate based on the dyadic
Green's function of an arbitrary dielectric environment, and consider non-local
limit of material permittivity in case of metallic halfspace and thin film. In
a dimer system, we find that the FRET rate is enhanced due to shared evanescent
photon modes bridging a donor and an acceptor. Furthermore, a general
expression for the FRET rate for multimer systems is derived. The presence of a
dielectric environment and the path interference effect enhance the transfer
rate, depending on the combination of distance and geometry.
