Manifold enhancement in the near-field and SERS efficiency of all-sputter grown Ag-nanoparticles on Al-film based mirror structures

Plasmonic Fabry–Pérot nanocavities produced via solution methods

“…30 All films with CuSCN were very smooth with a roughness root mean square (RMS) of 4.98 nm, considering they were fabricated on FTO that has an RMS of 30.5 nm, which is a notably rough substrate, corroborating CuSCN properties to make thin and smooth films. 26 Enhancements of plasmonic optical absorption in the presence of metallic films have been observed in gap mode plasmonic coupling with metal film [31][32][33] and in Fabry-Pe ´rot nanocavity structures. 21 Gap mode devices enhance the optical absorption of the metallic film and the nanoparticles by inserting an ultrathin gap between the two structures, generally o10 nm.…”

“…21 Gap mode devices enhance the optical absorption of the metallic film and the nanoparticles by inserting an ultrathin gap between the two structures, generally o10 nm. The gap can be a thin dielectric layer 32,33 or simply a physical separation. 31 Independently on how they are fabricated, the gap mode devices' optical spectra have a characteristic enhancement in the absorption peaks of the metal film and nanoparticles intensity but do not significantly broaden the peaks absorption.…”