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Chin. Phys. B, 2017, Vol. 26(11): 114208    DOI: 10.1088/1674-1056/26/11/114208

Intensities and spectral features of the 4I13/2-4I15/2 potential laser transition of Er3+ centers in CaF2-CeF3 disordered crystal

Qing-Guo Wang(王庆国)1,2, Liangbi Su(苏良碧)3, Jun-Fang Liu(刘军芳)4, Bin Liu(刘斌)1, Feng Wu(吴锋)1,2, Ping Luo(罗平)1,2, Heng-Yu Zhao(赵衡煜)1, Jiao-Jiao Shi(施佼佼)1, Yan-Yan Xue(薛艳艳)1, Xiao-Dong Xu(徐晓东)5, Witold Ryba-Romanowski6, Piotr Solarz6, Radoslaw Lisiecki6, Zhan-Shan Wang(王占山)1, Hui-Li Tang(唐慧丽)1,2, Jun Xu(徐军)1,2
1. School of Physics Science and Engineering, Institute for Advanced Study, Tongji University, Shanghai 200092, China;
2. Shanghai Engineering Research Center for Sapphire Crystals, Shanghai 201899, China;
3. Key Laboratory of Transparent and Opto-Functional Advanced Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China;
4. School of Materials Science and Engineering, Tongji University, Shanghai 200092, China;
5. Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China;
6. Institute of Low Temperature and Structure Research, Polish Academy of Sciences(ILTSR), Okólna, 50-422 Wroclaw, Poland
Abstract  A CaF2-CeF3 disordered crystal containing 1.06% of Er3+ ions was grown by the temperature gradient technique. Optical absorption and emission spectra recorded at room temperature and at 10 K, luminescence decay curve recorded at room temperature, and extended x-ray-absorption fine structure spectra were analyzed with an intention to assess the laser potential related to the 4I13/24I15/2 transition of Er3+. In addition, the thermal diffusivity of the crystal was measured at room temperature. The analysis of room-temperature spectra revealed that the 4I13/2 emission is long-lived with a radiative lifetime value of 5.5 ms, peak emission cross section of 0.73×10-20 cm2, and large spectral width pointing at the tunability of the emission wavelength in the region stretching from approximately 1480 nm to 1630 nm. The energies of the crystal field components for the ground and excited multiplets determined from low-temperature absorption and emission spectra made it possible to predict successfully the spectral position and shape of the room-temperature 4I13/24I15/2 emission band. Based on the correlation of the optical spectra and dynamics of the luminescence decay, it was concluded that in contrast to Yb3+ ions in heavily doped CaF2 erbium ions in the CaF2-CeF3 crystal reside in numerous sites with dissimilar relaxation rates.
Keywords:  laser materials      crystal growth      excited states  
Received:  04 May 2017      Revised:  21 June 2017      Accepted manuscript online: 
PACS:  42.70.Hj (Laser materials)  
  81.10.Fq (Growth from melts; zone melting and refining)  
  78.47.da (Excited states)  
Fund: Project supported by Shanghai Engineering Research Center for Sapphire Crystals, China (Grant No. 14DZ2252500), the Fund of Key Laboratory of Optoelectronic Materials Chemistry and Physics Chinese Academy of Sciences (Grant No. 2008DP17301), the Fundamental Research Funds for the Central Universities of China, the National Natural Science Foundation of China and China Academy of Engineering Physics Joint Fund (Grant No. U1530152), the National Natural Science Foundation of China (Grant Nos. 61475177 and 61621001), the Natural Science Foundation of Shanghai Municiple, China (Grant No. 13ZR1446100), and the MOE Key Laboratory of Advanced Micro-Structured Materials of China.
Corresponding Authors:  Jun Xu     E-mail:

Cite this article: 

Qing-Guo Wang(王庆国), Liangbi Su(苏良碧), Jun-Fang Liu(刘军芳), Bin Liu(刘斌), Feng Wu(吴锋), Ping Luo(罗平), Heng-Yu Zhao(赵衡煜), Jiao-Jiao Shi(施佼佼), Yan-Yan Xue(薛艳艳), Xiao-Dong Xu(徐晓东), Witold Ryba-Romanowski, Piotr Solarz, Radoslaw Lisiecki, Zhan-Shan Wang(王占山), Hui-Li Tang(唐慧丽), Jun Xu(徐军) Intensities and spectral features of the 4I13/2-4I15/2 potential laser transition of Er3+ centers in CaF2-CeF3 disordered crystal 2017 Chin. Phys. B 26 114208

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