Table 5 Calculated microscopic parameters for energy transfer process, the number of phonons necessary to assist the energy transfer and the percentage of each phonon participated in the process in Y2Er and N2Er samples
Sample | Energy transfer | N (number of phonons) (% phonon assisted) | CD-A (×10−40 cm6 s) | |
|---|---|---|---|---|
Y2Er | ET1 (4I11/2→4I11/2) | 0 | 1 | 2.68 |
99.99 | 0.01 | |||
ET2 (4I13/2→4I13/2) | 0 | 1 | 10.4 | |
100 | 0 | |||
N2Er | ET1 (4I11/2→4I11/2) | 0 | 1 | 4.17 |
99.986 | 0.014 | |||
ET2 (4I13/2→4I13/2) | 0 | 1 | 13.0 | |
100 | 0 | |||
