Abstract
Radiative transition probabilities from 3P0, 1I6 ,1D2, and 1G 4 levels of Tm3+ in glasses were calculated using the matrix elements obtained by intermediate coupling scheme and experimentally obtained intensity parameters. In the absence of self-absorption of fluorescence by the glass host, the fluorescence intensities of m3+ and Er 3+ increase in the order borate < phosphate < germanate < tellurite. Nonradiative transition probabilities in different glass hosts from 1D2 to 1G4 levels of Tm 3+and from 4S3/2 to 4F9/2 and from 4F9/2 to 4I9/2 levels of Er 3+ were calculated. The nonradiative transition rates follow the formula WNR = W(0) exp(-αp), where p is the number of phonons matching the energy gap. The nonradiative transition rates of Erl+ exhibit temperature dependence consistent with the multiphonon relaxation theory. In Tm3+ the temperature dependence of nonradiative relaxation rates is complicated by the existence of self-absorption and transfer of energy from matrix to Tm3+. Based on the above results, quantum efficiencies of luminescence of rare earth in glasses can be predicted.
Original language | English |
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Pages (from-to) | 4001-4012 |
Number of pages | 12 |
Journal | The Journal of Chemical Physics |
Volume | 63 |
Issue number | 9 |
DOIs | |
State | Published - 1975 |