Spectroscopic Properties of Tm3+:Bi2TeO5 Single Crystal

Grażyna Dominiak-Dzik 1,  Witold Ryba-Romanowski 1,  Radosław Lisiecki 1,  Istvan Foldvari 2

1. Polish Academy of Sciences, Institute of Low Temperature and Structure Research (INTiBS), Okólna 2, Wrocław 50-422, Poland
2. Hungarian Academy of Sciences, Research Institute for Solid State Physics and Optics (SZFKI), Konkoly Thege M. út 29-33, Budapest H-1121, Hungary

Abstract
Single crystal of bismuth tellurite Bi2TeO5 (BTO) doped with trivalent thulium (Tm3+) was grown by the Czochralski method and investigated by spectroscopic techniques (absorption, emission). The Bi2TeO5 structure is orthorhombic with the space group Abm2. Tm3+ ions, introduced as an optical impurity into BTO, substitute Bi3+ ions located in sites with C1 and Cs point symmetry.

Polarised absorption and emission measurements, carried out at 5 and 300 K are presented. Results obtained were used to determine the energetic structure of thulium levels within the 4fN ground electronic configuration.

Emission located in the visible and near infrared (650 and 790 nm) characterises the system under study. The attention was put on luminescence dynamics. The time evolution of the emission intensity from the3H4 and 1G4 thulium luminescent states was investigated at low and room temperature. Luminescence decay curves are presented. Experimental lifetimes of thulium luminescent levels are compared with those in other Tm3+-doped systems.

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Presentation: Poster at Joint Fith International Conference on Solid State Crystals & Eighth Polish Conference on Crystal Growth, by Grażyna Dominiak-Dzik
See On-line Journal of Joint Fith International Conference on Solid State Crystals & Eighth Polish Conference on Crystal Growth

Submitted: 2007-01-16 11:51
Revised:   2007-05-09 21:22
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