Engineering the density of photonic states with electromagnetic modes has become an attractive approach for controlling energy transfer between molecular systems. Here we report the use of surface lattice resonances (SLRs) that arise in arrays of metal−insulator−metal (MIM) nanocylinders to control the energy transfer between two archetypal molecular dyes, P580 (donor) and P650 (acceptor). When the SLR is detuned from the donor emission, energy transfer is observed as expected, with donor emission decreasing with respect to the acceptor emission (donor/ acceptor peak fluorescence ratio = 0.45). In contrast, when the SLR is tuned to the donor emission, Purcell enhancement becomes dominant, outcompeting energy transfer and suppressing acceptor emission (donor/acceptor peak fluorescence ratio = ∼5.4). To analyze these observations, a kinetic model was developed, based on pumping rate, donor-to-acceptor energy transfer rate, and radiative and nonradiative decay of the dyes. The results suggest the additional decay channel introduced by the SLR for which λ k ∥ =0 SLR = λ emission donor competes strongly with the energy transfer process, while SLRs that coincide with donor emission peaks at larger values of in-plane momentum k || have a less pronounced effect. Our study highlights the wide range of SLR-based Purcell effects possible by simple changes in the lattice dimensions and their consequences in the kinetics of molecular energy transfer processes in the condensed phase.
Cooperative phenomena stemming from radiation-field-mediated coupling between individual quantum emitters are presently attracting broad interest for on-chip photonic quantum memories and longrange entanglement. Common to these applications is the generation of electro-magnetic modes over macroscopic distances. Much research, however, is still needed before such systems can be deployed in the form of practical devices, starting with the investigation of alternate physical platforms. Quantum emitters in two-dimensional (2D) systems provide an intriguing route because these materials can be adapted to arbitrarily shaped substrates to form hybrid systems where emitters are near-field-coupled to suitable optical modes. Here, we report a scalable coupling method allowing color center ensembles in a van der Waals material -hexagonal boron nitride -to couple to a delocalized high quality plasmonic surface lattice resonance. This type of architecture is promising for photonic applications, especially given the ability of the hexagonal boron nitride emitters to operate as singlephoton sources at room temperature.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.