| Autor: |
E. S. Syrkin, M.A. Mamalui, P. N. Zhmurin, Yu. V. Malyukin, S. B. Feodosyev |
| Rok vydání: |
2004 |
| Předmět: |
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| Zdroj: |
physica status solidi (c). 1:2621-2624 |
| ISSN: |
1610-1634 |
| Popis: |
The system under consideration consists of a Pr 3 + ion placed into a nanodimensional Y 2 SiO 5 crystal (∼20 nm), which rests on a glass substrate. The spectrum and attenuation of the fluorescence of the Pr 3 + ion have been studied by the method of confocal fluorescent microscopy. The rapid electron relaxation in J-multiplets of rare earth impurity ions split by the crystal field (for a usual bulk crystal τ∼10 - 9 -10 - 1 2 sec) is shown to be suppressed in the nanodimensional crystal of Y 2 SiO 5 :Pr 3 + . For the excited Stark components of 1 D 2 multiplet, the electron relaxation appears to be more than 10 4 times suppressed, while an average splitting of the 1 D 2 multiplet by the crystal field of ligands is 200 cm - 1 . The observed phenomena strongly depends on the interaction of the Y 2 SiO 5 :Pr 3 + cluster with the substrate and the surrounding ('matrix'). Experimental results and theoretical calculations show the noticeble changes in the structure of vibrational spectrum and the density of vibrational states of the nanodimensional Y 2 SiO 5 :Pr 3 + crystal. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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