Developments in Ceramic Materials Research

88
Fluorescence, a.u.
I transfer , a.u.
0.1
0.01
0.001
T. T. Basiev, V. A. Demidenko, K. V. Dykel’skii et al.
1
0.1
1
time, μs
La 2 O 2 S:Nd 3+ (1 w. %)
0 200 400 600
time, μs
a)
La 2 O 2 S:Nd 3+ (1 w. %)
0 20 40 60 80 100
Figure 32. Fluorescence kinetics decay of the 4 F 3/2 manifold of the Nd 3+ ion in the La 2O 2S:Nd 3+ (1 wt%)
ceramic sample measured under 904 nm laser excitation at 1.08 μm fluorescence detection at 300 K—a
and the Forster stage of energy transfer kinetics—b.
An average rate of energy migration can be calculated from experimental data with the
following equation:
Using the following equation for hopping model of energy migration:
b)
(7)
(8)