Gómez, Luis A. ; Maciel, Glauco S. ; de Araújo, Cid B. ; Patra, Amitava (2008) Upconversion in Er3+-doped ZrO2 nanocrystals pumped at 1.426μm Journal of Applied Physics, 103 (5). Article ID 053507. ISSN 0021-8979
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Official URL: http://aip.scitation.org/doi/abs/10.1063/1.2844468...
Related URL: http://dx.doi.org/10.1063/1.2844468
Abstract
The effect of frequency upconversion (UC) was investigated in 0.05 and 2.00 mol % Er2O3 doped in ZrO2 nanocrystals prepared by a sol-emulsion-gel process. Laser excitation at 1.426 μm produced UC luminescence at ∼ 0.800, ∼ 0.525, ∼ 0.550, and ∼ 0.660 μm corresponding to Er3+ transitions 4I9/2→ 4I15/2, 4H11/2→ 4I15/2, 4S3/2→ 4I15/2, and 4F9/2→4I15/2 respectively. The role played by excited state absorption and energy transfer mechanisms in the UC process was analyzed using rate equations for Er3+ energy level populations. The energy transfer rate between pairs of Er3+ ions (4I9/2+4I13/2→4I15/2+4S3/2) was determined from comparison between theoretical predictions and experimental data.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to AIP Publishing. |
| ID Code: | 104816 |
| Deposited On: | 01 Dec 2017 11:09 |
| Last Modified: | 01 Dec 2017 11:09 |
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