Fig. 9
From: Nonlinear plasmonics: second-harmonic generation and multiphoton photoluminescence
Transient electron and atom temperature distributions in the Photoluminescence relaxation process. a Three relaxation stages of optically excited electrons. Te and Tl represent the temperature of electrons and lattice, respectively. τth and τe-ph are the time of electron–electron scatterings and electron–phonon couplings, respectively. Reprinted with permission from Chemical Physics 2000, 251, 237–258. Copyright 2000 Elsevier Publishing Group. b Snapshots of Au 6266 simulated using the revised Perdew-Burke-Ernzerh machine-learning force fields (rPBE ML-FF) at different nominal simulation temperatures, with atoms coloured according to the clustering algorithm. Red: solid inner; yellow: liquid inner; dark blue: solid high-coordination surface; light blue: liquid high-coordination surface; dark green: solid low-coordination surface; light green: liquid low-coordination surface. Reprinted with permission from Nature Communications 2021, 12, 6056. Copyright 2021 Springer Nature Publishing Group