Morphology dependence of nanoparticle-on-mirror geometries: A quasinormal mode analysisKalun Bedingfield, Eoin Elliott, Nuttawut Kongsuwan, Jeremy J. Baumberg and Angela DemetriadouEPJ Appl. Metamat., 9 (2022) 3DOI: https://doi.org/10.1051/epjam/2022002