Fluorescence enhancement and strong-coupling in faceted plasmonic nanocavitiesNuttawut Kongsuwan, Angela Demetriadou, Rohit Chikkaraddy, Jeremy J. Baumberg and Ortwin HessEPJ Appl. Metamat., 5 (2018) 6DOI: https://doi.org/10.1051/epjam/2018004