Speaker
Description
Over the years, strong light-matter coupling has been observed and studied in a plethora of configurations, with microcavities and plasmonic nanostructures being among the most common geometries. Recently, however, hybrid electromagnetic modes that integrate plasmonic and photonic contributions have been suggested as a versatile platforms with distinct advantages for tailoring light–matter interactions.
Here, we present such hybrid fields, formed through the coupling between localized surface plasmon resonances of Au nanoparticles and Fabry–Pérot microcavity modes. Furthermore, by using this hybrid platform, we demonstrate that the cavity field can give rise to cooperative coherent coupling between the spatially separated plasmonic nanoparticles and the molecules, by mediating long-range dipole-dipole interactions. As we show, this cavity-mediated coupling also enhances the plasmon–exciton mixing, as compared to their direct interaction.
This configuration opens new avenues for tailoring light–matter interactions at the nanoscale, by supporting novel hybrid plexcitonic states that incorporate contributions from plasmons, excitons, and extended cavity fields.