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. 2023 Feb 6;123(4):1552–1634. doi: 10.1021/acs.chemrev.2c00316

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© 2023 The Authors. Published by American Chemical Society

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(a, b) Images of the temporal changes in the plasmon resonance and resonant SERS in the SEF spectra for the NP dimer, respectively. The white bar indicates the loss by the laser notch filter. (c, d) Plasmon resonance spectra and resonant SERS with SEF spectra extracted from panels a and b, respectively, at detection times indicated in the panels. The maxima of the envelopes are indicated by arrows. (e) Combined spectra of the resonant SERS and SEF calculated from the product of eq 18 and the sum of σ_R (Raman cross-section) and σ_F (fluorescence cross-section). Values of ℏg₁(coupling energy) and η_Rf (quantum efficiency) for the SEF are indicated in the panels, while the value of η_RR (quantum efficiency) for the resonant SERS is fixed at 0.001; maxima of the envelopes are indicated by arrows. (f) Schematic image of the supposed changes from ultrafast to conventional SEF with decreasing ℏg₁. Reproduced with permission from ref (68). Copyright 2018 American Institute of Physics.