Dynamical processes of Ln3+ ions doped in LaF3 nanocrystals embedded in transparent oxyfluoride glass

Surface-plasmon-enhanced frequency upconversion in Pr3+ doped tellurium-oxide glasses containing silver nanoparticles

“…This process was already observed in other glassy systems and vitreous ceramics, which was attributed to an energy exchange process involving a pair of Pr 3+ ions. [12][13][14][15][16][17][18] Accordingly, two ions initially excited to level 1 D 2 exchange energy in such a way that one ion is promoted to the ͓ 3 P J ͑J =0,1,2͒, 1 I 6 ͔ manifold, while the other nonradiatively decays to lower energy levels. On the other hand, the intensity of the emission corresponding to the 1 D 2 → 3 H 5 transition linearly depends on the laser intensity.…”

Fluorescence enhancement of Ln3+ doped nanoparticles

“…The improvements were attributed to the combined effect of lack of centrosymmetry and removal of hydroxyl groups around the lanthanide ions. Transparent glass ceramics containing nanoparticles are also a good example illustrating the surface modification of a nanoparticle with a glass matrix [52,53].…”

Effect of crystal structure and ions concentration on luminescence in Yb3+ and Tm3+ codoped fluoride microcrystals

“…Observation of fluorescence temporal decay is another effective way to investigate the change in the local environment, because the decay time can be affected significantly by the local environment [7]. The temporal evolution of Tm 3+ luminescence in the microcrystals was studied and the time-dependent emission profile for the representative emission (347.2 nm) from 1 I 6 level of Tm 3+ ions was recorded, as shown in Fig.…”

“…However, phase change of these samples depends upon increasing the calcined temperature, as well as changing experimental conditions. As we know, except for crystal structure, experimental conditions also determine the features of fluorescence spectroscopy for a given optically active ion [7][8][9][10]. So when we investigated spectra feature, experimental conditions as a factor cannot be ignored.…”