中国物理B ›› 2021, Vol. 30 ›› Issue (1): 17801-.doi: 10.1088/1674-1056/abaede

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  • 收稿日期:2020-06-25 修回日期:2020-08-08 接受日期:2020-08-13 出版日期:2020-12-17 发布日期:2020-12-30

The effects of Er 3 + ion concentration on 2.0-μ m emission performance in Ho 3 + /Tm 3 + co-doped Na 5Y 9F32 single crystal under 800-nm excitation

Benli Ding(丁本利)1, Xiong Zhou(周雄)1, Jianli Zhang(章践立)1, Haiping Xia(夏海平)1,†, Hongwei Song(宋宏伟)2, and Baojiu Chen(陈宝玖)3   

  1. 1 Key Laboratory of Photo-electronic Materials, Ningbo University, Ningbo 315211, China; 2 State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering and College of Physics, Jilin University, Changchun 130012, China; 3 Department of Physics, Dalian Maritime University, Dalian 116026, China
  • Received:2020-06-25 Revised:2020-08-08 Accepted:2020-08-13 Online:2020-12-17 Published:2020-12-30
  • Contact: Corresponding author. E-mail: hpxcm@nbu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51772159), the Natural Science Foundation of Zhejiang Province, China (Grant No. LZ17E020001), the Natural Science Foundation of Ningbo City (Grant No. 202003N4099), and K C Wong Magna Fund in Ningbo University.

Abstract: Na5Y9F32 single crystals doped with ∼ 0.8-mol% Ho3 + , ∼ 1-mol% Tm3 + , and various Er3 + ion concentrations were prepared by a modified Bridgman method. The effects of Er3 + ion concentration on 2.0-μ m emission excited by an 800-nm laser diode were investigated with the help of their spectroscopic properties. The intensity of 2.0-μ m emission reached to maximum when the Er3 + ion concentration was ∼ 1 mol%. The energy transfer mechanisms between Er3 + , Ho3 + , and Tm3 + ions were identified from the change of the absorption spectra, the emission spectra, and the measured decay curves. The maximum 2.0-μ m emission cross section of the Er3 + /Ho3 + /Tm3 + tri-doped Na5Y9F32 single crystal reached 5.26 × 10 -21 cm2. The gain cross section spectra were calculated according to the absorption and emission cross section spectra. The cross section for ∼ 2.0-μ m emission became a positive gain once the inversion level of population was reached 30%. The energy transfer efficiency was further increased by 11.81% through the incorporation of Er3 + ion into Ho3 + /Tm3 + system estimated from the measured lifetimes of Ho3 + /Tm3 + -and Er3 + /Ho3 + /Tm3 + -doped Na5Y9F32 single crystals. The present results illustrated that the Er3 + /Ho3 + /Tm3 + tri-doped Na5Y9F32 single crystals can be used as promising candidate for 2.0-μ m laser.

Key words: 2.0-μ m emission, Er3 + /Ho3 + /Tm3 + , energy transfer, Na5Y9F32 single crystal

中图分类号:  (Optically stimulated luminescence)

  • 78.60.Lc
78.55.Hx (Other solid inorganic materials)