Clarifying the origin of second-harmonic generation from an epsilon-near-zero flim-coupled plasmonic nanoparticle-on-mirror system by size-dependence propertiesYunfei Zhang, Fuhua Gao and Fan YangEPJ Appl. Metamat., 11 (2024) 1DOI: https://doi.org/10.1051/epjam/2023004
