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Proceedings Paper

Up-conversion and ligand-metal coupling in Cs2NaEr(NO2)6
Author(s): Barbara Nissen-Sobocinska; Edward Lukowiak; Wieslaw Strek; Thomas Luxbacher; Harald P. Fritzer; Rui-Qiang Xie; Colin D. Flint
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Paper Abstract

The cubic system Cs2NaEr(NO2)6 provides an interesting comparison with the corresponding hexachloroelpasolite, having a similar structure but, in addition, there are high frequency phonons present since the one phonon spectrum extends up to 1 600 cm-1. The absorption spectrum at low temperatures shows a beautiful progression in the NO2 bending mode in the near UV in addition to the typical f-f erbium centered transitions. Under red excitation at 80 K into the 4I15/2 yields 4F9/2 transition strong, but short lived emission is observed from both the 4F9/2 and 4I9/2 states. At high irradiation densities intense emission is also observed in the blue at 21 460 and 21 280 cm-1 and at other wavenumbers in the UV and green regions. These emissions have different complex decay curves and appear to arise from energy migration to defect sites followed by up- conversion at those sites. In the up-conversion process, the luminescent defect sites are destroyed but appear to regenerate on long term storage of the crystals at room temperature.

Paper Details

Date Published: 1 November 1997
PDF: 4 pages
Proc. SPIE 3176, Tunable Solid State Lasers, (1 November 1997); doi: 10.1117/12.293438
Show Author Affiliations
Barbara Nissen-Sobocinska, Institute of Low Temperature and Structure Research (Poland)
Edward Lukowiak, Institute of Low Temperature and Structure Research (Poland)
Wieslaw Strek, Institute of Low Temperature and Structure Research (Poland)
Thomas Luxbacher, Technische Univ. Graz (Austria)
Harald P. Fritzer, Technische Univ. Graz (Austria)
Rui-Qiang Xie, Univ. of London (United Kingdom)
Colin D. Flint, Univ. of London (United Kingdom)

Published in SPIE Proceedings Vol. 3176:
Tunable Solid State Lasers
Wieslaw Strek; Edward Lukowiak; Barbara Nissen-Sobocinska, Editor(s)

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