Fig. 1. Schematic model of the SET and spontaneous emission for single fluorescent molecule in Au/SiO₂/Ag core-shell nanostructures

Fig. 2. Schematic diagram of LSPR hybridization of gold core and silver shell in Au/SiO₂/Ag structure

Fig. 3. Normalized optical characteristic curve of ASA structure and the near-field distribution at the plasma resonance frequency

Fig. 4. Non-radiative decay rate as a function of molecular-gold surface distance dwhen the LSPR resonance energy is 2.2 eV

Fig. 5. Non-radiative decay rate as a function of molecular-gold surface distance dwhen the LSPR resonance energy is 2.9 eV

Fig. 6. Non-radiative decay rate as a function of molecular-gold surface distance dwhen the LSPR resonance energy is 3.6 eV

Fig. 7. Non-radiative decay rate changes with molecular orientation θ

Fig. 8. Radiative decay rate as a function of the distance d from the molecule to the gold core surface

Fig. 9. Fluorescence quantum efficiency as a function of the distance d