期刊
JOURNAL OF LUMINESCENCE
卷 210, 期 -, 页码 164-168出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2019.02.032
关键词
PbF2 crystal; Deactivation; Er3+/Eu3+; 2.75 mu m emission; Energy transfer
类别
资金
- National Key Research and Development Program of China [2017YFB1104500]
- National Natural Science Foundation of China (NSFC) [51702124, 61735005, 11704155, 61475067]
- Guangdong Project of Science and Technology [2016B090917002, 2016B090926004]
- Guangzhou Union Project of Science and Technology [201604040006]
- Research project of scientific research cultivation and innovation fund of Jinan University [11617329]
- Guangdong Project of Featured Innovation Grants [2017KTSCX012]
- Guangzhou science and technology project [805182153063]
The use of Eu3+ codoped for the enhancement of the transition of Er3+:I-4(11/2) -> I-4(13/2) similar to 2.75 mu m emissions was observed in the Er/Eu co-doped PbF2 crystal for the first time. The similar to 2.75 mu m 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 mu m 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+:I-4(13/2), and has little effect on the upper laser level of Er3+:I-4(11/2) at the same time. Moreover, the energy transfer efficiency from the Er3+:I-4(13/2) level to the Eu3+:F-7(6) level is as high as 88.07%, indicating that the Eu3+ ion is an effective deactivation ion for enhancing the similar to 2.75 mu m emission in Er/Eu:PbF2 crystal. These advantageous spectroscopic characteristics suggest that the Er/Eu:PbF2 crystal may be a promising material for similar to 2.75 mu m mid-infrared lasers under the pump of a conventional 970 nm LD.
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