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Energy transfer ratio for finite size dipoles in microwave range - FRET analogy

Förster Resonant Energy Transfer (FRET) is a near-field interaction between pairs of quantum emitters that can be modified by their electromagnetic environment. The different approaches to control FRET have been studied analytically and experimentally in the optical frequency range, although, such experiments are challenging. An effective way to investigate this effect is to directly measure an impedances of dipole antennas in the microwave frequency range, which is an analog of the FRET. In this work, we perform an analytical and experimental analysis of the energy transfer between two dipoles near a conductive plane in the microwave range for two dipole orientations: parallel and perpendicular. We analytically investigate the influence of the dipole size on the energy transfer and compare it with the solution for FRET between ideal point dipoles. We show theoretical and experimental evidences of quenching and enhancement of the energy transfer for respectively parallel and perpendicular orientations of the dipoles.