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Radiative parameters for multi-channel visible and near-infrared emission transitions of Sm3+ in heavy-metal-silicate glasses
- Source :
-
Journal of Physics & Chemistry of Solids . May2013, Vol. 74 Issue 5, p772-778. 7p. - Publication Year :
- 2013
-
Abstract
- Abstract: Multi-channel visible and near-infrared (NIR) emission transitions originating from 4G5/2 emitting state of Sm3+ in cadmium-aluminum-silicate (CAS) glasses with maximum-phonon-energy of ∼980cm−1 have been investigated. Based on the measured absorption spectrum, the Judd–Ofelt parameters Ω t (t=2, 4, 6) are derived to be 2.87×10−20, 3.34×10−20 and 1.86×10−20 cm2, respectively. From the evaluated Judd–Ofelt parameters, the radiative parameters such as spontaneous emission probabilities (A rad), branching ratios (β), and radiative lifetime (τ rad) are obtained from the 4G5/2 excited level to different lower energy levels. The efficient visible and NIR transition emissions have been observed in the Sm3+ doped CAS glasses, and the maximum stimulated emission cross-sections (σ e-max) corresponding to emission peaks are calculated and demonstrated to lay in the same order of magnitude. The quantum efficiency of 4G5/2 level of Sm3+ has been derived to be 60%. Investigations on multi-channel radiative transition emissions originated from 4G5/2 level of Sm3+ in CAS glasses expose its potential applications in tunable laser, medical light source and NIR optoelectronic devices. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00223697
- Volume :
- 74
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Physics & Chemistry of Solids
- Publication Type :
- Academic Journal
- Accession number :
- 85876968
- Full Text :
- https://doi.org/10.1016/j.jpcs.2013.01.021