Enhanced 2.75 µm emissions of Er3+ via Eu3+ deactivation in PbF2 crystal

The use of Eu3+ codoped for the enhancement of the transition of Er3+: 4I11/2→4I13/2 ~2.75 µm emissions was observed in the Er/Eu co-doped PbF2 crystal for the first time. The ~2.75 µm energy transfer mechanism and fluorescence emission properties of the Eu/Er co-doped PbF2 crystal were investigated...

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Bibliographic Details
Published in:Journal of luminescence 2019-06, Vol.210, p.164-168
Main Authors: Li, Xiao, Zhang, Peixiong, Zhu, Siqi, Yin, Hao, Li, Zhen, Chen, Zhenqiang, Zheng, Yi, Yu, Jin
Format: Article
Language:English
Subjects:
2.75 µm emission
Deactivation
Energy transfer
Er3+/Eu3
PbF2 crystal
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Summary:The use of Eu3+ codoped for the enhancement of the transition of Er3+: 4I11/2→4I13/2 ~2.75 µm emissions was observed in the Er/Eu co-doped PbF2 crystal for the first time. The ~2.75 µm energy transfer mechanism and fluorescence emission properties of the Eu/Er co-doped PbF2 crystal were investigated at length. The results show that the codoped of Eu3+ ion in Er/Eu: PbF2 crystal greatly enhances Er3+:2.75 µm emission under excitation of a common 970 nm laser diode. In addition, it is found that the Eu3+ ion depopulates the lower laser level of Er3+:4I13/2, and has little effect on the upper laser level of Er3+:4I11/2 at the same time. Moreover, the energy transfer efficiency from the Er3+:4I13/2 level to the Eu3+:7F6 level is as high as 88.07%, indicating that the Eu3+ ion is an effective deactivation ion for enhancing the ~2.75 µm emission in Er/Eu: PbF2 crystal. These advantageous spectroscopic characteristics suggest that the Er/Eu: PbF2 crystal may be a promising material for ~2.75 µm mid-infrared lasers under the pump of a conventional 970 nm LD.
ISSN:0022-2313
1872-7883
DOI:10.1016/j.jlumin.2019.02.032