Active control of radiative and nonradiative processes in coupled quantum systems embedded in a λ/2-microresonator

In this paper, the interaction of closely-spaced coupled quantum systems in a photonic environment is studied. A simple model based on rate equations is introduced, allowing to describe the influence, e.g., of a resonator on the radiative and nonradiative processes, such as Förster resonant energy transfer, in the coupled system. The validity of the model is tested by comparing results to measured spectra of the fluorescent protein DsRed in a λ/2-microresonator. This approach will prove useful for studying the radiative and nonradiative behaviour of inseparable fluorescent compounds such as complex biological molecules.