Engineering dimensionality of collective dipole-dipole interactions in resonant nanophotonic environment

In an ensemble of interacting emitters, simultaneously many competing relaxation channels exist for quenching of each quantum emitter by many other randomly distributed

emitters due to dipole-dipole iteractions between them. As there is a hierarchy of distances between the emitters, averaging over all possible sites of the interacting acceptor emitters makes dipole-dipole interactions essentially sense the whole spatial distribution of the interacting emitters. This sensing of the spatial distribution of the interacting emitters is associated with the electromagnetic environment and thus the vacuum fluctuating field. Here we experimentally probe the environment using dipole-dipole interactions between an ensemble of emiiters using resonance energy transfer. While the stretched exponential profile, I(t)/I0 = exp(−γt − αt^β), with β = 0.5 in resonance energy transfer (dipole-dipole interactions) being well-known to 3D geometries, the fluorescence decay dynamics in more complicated resonant nanophotonic environments. It remain largely unexplored. To this end, we observe modified fluorescence decay traces on the resonant plasmonic nanophotonbic environment (β = 0.3) compared to conventional control samples such as glass and off-resonant inhomogenoues nanophotonnic media. Our work sheds light on the unique origin of fluorescent decay dynamics and shows that they provide a way of

uncovering the dimensionality of dipole-dipole interactions modified by a nanophotonic environment