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. 2024 Aug 13;15:6920. doi: 10.1038/s41467-024-51265-1

Fig. 2. Photodynamics of a G center in a waveguide.

Fig. 2

a Above-bandgap excitation (Γexc) creates excess carriers in the conduction and valence bands (CB, VB) which recombine at the localized defect levels (ΓG) and produce single-photon emission. b PL spectrum of the ZPL of the G center. c Excitation power dependence of the ZPL PL shows saturated emission. d PL lifetime measurement with pulsed excitation.