Fluorescence line narrowing spectroscopy of Sm{sup 2+} and Eu{sup 3+} in sodium borate glasses
- Division of Material Chemistry, Faculty of Engineering, Kyoto University, Sakyo-ku, Kyoto 606-01 (Japan)
A fluorescence line narrowing technique was carried out for sodium borate glasses containing a Sm{sup 2+} ion and its isoelectonic Eu{sup 3+} ion under a pulsed tunable dye laser excitation. In order to obtain site-dependent information, measurements were made by exciting the inhomogeneously broadened {sup 5}{ital D}{sub 0}-{sup 7}{ital F}{sub 0} transition at 10 K. Line-narrowing fluorescence of the {sup 5}{ital D}{sub 0}{r_arrow}{sup 7}{ital F}{sub 1} transition and the temporal changes of the emission lines were investigated as a function of excitation energy, and the dynamics of excited states for both ions were compared with each other. The results indicate that the site-to-site variations of the inhomogeneous broadening of {sup 5}{ital D}{sub 0}{endash}{sup 7}{ital F}{sub 0} transitions are attributed to the apparent difference in local environment between the Sm{sup 2+} and Eu{sup 3+} ions doped in borate glasses with Na{sub 2}O content from 10 to 20 mol{percent}. Also, a decrease in concentration of rare-earth ions causes a more significant effect on Eu{sup 3+} ions than on Sm{sup 2+} ions in the high-excitation-energy range. It is concluded that the difference in the local environment between Sm{sup 2+} and Eu{sup 3+} is mainly ascribable to the difference in the valence and in the ionic radius. {copyright} {ital 1997 American Institute of Physics.}
- OSTI ID:
- 463483
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 2 Vol. 81; ISSN JAPIAU; ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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