Figure 3
From: Optically-active metastable defects in volumetric nanoplasmonic composites
Different origins of the two observed metastable defects confirmed by differences in the dependence of the photoluminescence intensity on temperature. (a) PL spectra at 4 K–25 K, and (b) PL spectra at 25 K–90 K, which demonstrate the different behaviours of the MGR1 and MG1 defect-related photoluminescence. (c) Dependence of the integrated intensity on the excitation power for the MGR1 and MG1 bands in comparison with the 4I11/2–4I15/2 electric-dipole transitions within the 4 f shell of Er3+.
