Fig. 3: Simulated exciton cooling dynamics of 38% Ga and 65% Ga QDs.
From: Exciton-phonon coupling and phonon-assisted exciton relaxation dynamics in In1-xGaxP quantum dots
a, b Overall energy loss upon initial excitation with all phonons considered as compared to acoustic modes only. 38% Ga QDs show an overall energy loss time of 245 fs with all phonons considered in the calculation, and this time constant increases to 1936 fs when only acoustic phonon modes are considered. 65% Ga QDs show a faster energy loss time of 91 fs with all phonon modes considered, and this time constant decreases to 580 fs when only acoustic phonon modes are considered. c and d The calculated excitonic density of states over 1000 fs show population dynamics of (c) 38% Ga QDs excited at 2.12 eV and (d) 65% Ga QDs excited at 2.20 eV. e and f Comparison of simulated and experimental lifetimes for hot exciton cooling dynamics with varying excitation energy for e 38% Ga and f 65% Ga QDs.
