Figure 4
From: Optically-active metastable defects in volumetric nanoplasmonic composites
Optically active metastable defects in active and passive bulk nanoplasmonic materials. (a) PL spectra for sample doped with silver nanoparticles (NBP:nAg) (b) PL spectra for sample co-doped with silver nanoparticles and Er3+ ions (NBP:nAg,Er3+). The blue curves represent the PL spectra after cooling the sample without illumination; the red curves represent the PL spectra obtained after photo-quenching of MGR1 and MG1 emissions by illumination with a laser beam during the cooling-down process.
