The fluorescence dynamics of the 3H4 and 3F4 energy levels of Tm3+ in YVO4 single crystals codoped or not codoped with Tb3+ and Ho3+ ions was experimentally investigated and compared with classical energy-transfer models. In the YVO4:1% Tm3+ and YVO4:1% Tm3+, 1% Ho3+ crystals, the 3H4 state relaxes predominantly by internal cross-relaxation-type energy transfers, whereas in the YVO4:0.5% Tm3+, 1% Tb3+ and YVO4:1% Tm3+, 1% Tb3+ crystals the relaxation is dominated by direct energy transfers to the 7F1 state of the Tb3+ ions. In all of the codoped systems, strong energy transfers from the 3F4 state of the Tm3+ ions to the 7F1 and 5I7 states of the Tb3+ and Ho3+ codopants were evident. The electric dipole-electric dipole coupling parameter was evaluated for several cross-relaxation and direct-energy-transfer processes.

Fluorescence dynamics of YVO4:Tm3+, YVO4:Tm3+, Tb3+ and YVO4:Tm3+, Ho3+ crystals / Bettinelli, M.; Ermeneux, F. S.; Moncorge, R.; Cavalli, E.. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 10:37(1998), pp. 8207-8215. [10.1088/0953-8984/10/37/008]

Fluorescence dynamics of YVO4:Tm3+, YVO4:Tm3+, Tb3+ and YVO4:Tm3+, Ho3+ crystals

Cavalli E.
1998-01-01

Abstract

The fluorescence dynamics of the 3H4 and 3F4 energy levels of Tm3+ in YVO4 single crystals codoped or not codoped with Tb3+ and Ho3+ ions was experimentally investigated and compared with classical energy-transfer models. In the YVO4:1% Tm3+ and YVO4:1% Tm3+, 1% Ho3+ crystals, the 3H4 state relaxes predominantly by internal cross-relaxation-type energy transfers, whereas in the YVO4:0.5% Tm3+, 1% Tb3+ and YVO4:1% Tm3+, 1% Tb3+ crystals the relaxation is dominated by direct energy transfers to the 7F1 state of the Tb3+ ions. In all of the codoped systems, strong energy transfers from the 3F4 state of the Tm3+ ions to the 7F1 and 5I7 states of the Tb3+ and Ho3+ codopants were evident. The electric dipole-electric dipole coupling parameter was evaluated for several cross-relaxation and direct-energy-transfer processes.
1998
Fluorescence dynamics of YVO4:Tm3+, YVO4:Tm3+, Tb3+ and YVO4:Tm3+, Ho3+ crystals / Bettinelli, M.; Ermeneux, F. S.; Moncorge, R.; Cavalli, E.. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - 10:37(1998), pp. 8207-8215. [10.1088/0953-8984/10/37/008]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/2894396
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