Wydział Chemii

Radosław Lisiecki

Piotr Solarz

G. Dominiak-Dzik

Witold Ryba-Romanowski

Marcin Sobczyk

P. Černý

J. Šulc

H. Jelínková

Y. Urata

M. Higuchi

2006

Physical Review B

74

1-14

10.1103/PhysRevB.74.035103

Naukowa

Angielski

Artykuł

YVO4:Tm3+crystals grown by the Czochralski technique and GdVO4:Tm3+and LuVO4:Tm3+crystalsgrown by the floating-zone technique were investigated using methods of optical spectroscopy. Polarizedabsorption and emission spectra were recorded at room temperature and at 6 K. The crystal-field analysis wasperformed assuming theD2dsite symmetry for Tm3+ions. In this way the missing crystal-field components ofthe3H6ground multiplet were located. Room temperature absorption spectra were analyzed in the frameworkof the Judd-Ofelt theory. Evaluated radiative lifetimes of luminescent levels of Tm3+follow a general trenddiminishing in agreement with the sequence: YVO4:Tm3+→GdVO4:Tm3+→LuVO4:Tm3+. Luminescencelifetimes measured for the systems under study are similar except for the3F4lifetime, which appears to besurprisingly short for LuVO4:Tm3+. Anisotropy of optical spectra is particularly pronounced in LuVO4:Tm3+.Peak absorption cross section for the band relevant for optical pumping at about 805 nm is roughly three timeshigher for
polarization. Stimulated emission cross sections for the3F4-3H6transition near 1800 nm wereevaluated using the reciprocity method. The diode-pumped continuous wave laser operation in GdVO4:Tm3+with a slope efficiency of up to 40% is demonstrated. In LuVO4:Tm3+the diode-pumped laser oscillation in apulsed mode was observed.

https://doi.org/10.1103/PhysRevB.74.035103