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Yellow-green upconversion luminescence of Dy3+ ion in LiNbO3 crystal heavily codoped with ZnO

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8 Author(s)
Li, Aihua ; Department of Applied Physics, Harbin Institute of Technology, Harbin 150001, People’s Republic of China ; Lu, Qiang ; Zheng, Zhiren ; Liang Sun
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The observed Dy3+ ion upconversion luminescence in LiNbO3 crystal heavily codoped with ZnO was spectrally and temporally analyzed by microsecond time-resolved spectrum under 806 nm intense femtosecond laser excitation at room temperature. Absorption spectrum and modified Judd-Ofelt approach were used to investigate its spectroscopic properties. The bright blue and intense yellow emissions are assigned to transitions 4F9/26H15/2 and 4F9/26H13/2, respectively. It is concluded that the main upconversion mechanism is excited state absorption by pump power dependence in combination with luminescence intensity temporal evolvements.

Published in:

Journal of Applied Physics  (Volume:102 ,  Issue: 11 )

Date of Publication:

Dec 2007

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