2.0-μm emission and energy transfer of Ho3+/Yb3+ co-doped LiYF4 single crystal excited by 980 nm

doi:10.1088/1674-1056/24/6/067802

中国物理B ›› 2015, Vol. 24 ›› Issue (6): 67802-067802.doi: 10.1088/1674-1056/24/6/067802

2.0-μm emission and energy transfer of Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal excited by 980 nm

杨硕^a, 夏海平^a, 姜永章^a, 张加忠^a, 江东升^a, 王成^a, 冯治刚^a, 张健^a, 谷雪梅^a, 章践立^a, 江浩川^b, 陈宝玖^c

a Key Laboratory of Photoelectronic Materials, Ningbo University, Ningbo 315211, China;
b Ningbo Institute of Materials Technology and Engineering, the Chinese Academy of Sciences, Ningbo 315211, China;
c Department of Physics, Dalian Maritime University, Dalian 116026, China

收稿日期:2014-11-09 修回日期:2015-01-04 出版日期:2015-06-05 发布日期:2015-06-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51472125 and 51272109 ) and the K.C. Wong Magna Fund in Ningbo University, China (Grant No. NBUWC001).

2.0-μm emission and energy transfer of Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal excited by 980 nm

Yang Shuo (杨硕)^a, Xia Hai-Ping (夏海平)^a, Jiang Yong-Zhang (姜永章)^a, Zhang Jia-Zhong (张加忠)^a, Jiang Dong-Sheng (江东升)^a, Wang Cheng (王成)^a, Feng Zhi-Gang (冯治刚)^a, Zhang Jian (张健)^a, Gu Xue-Mei (谷雪梅)^a, Zhang Jian-Li（章践立)^a, Jiang Hao-Chuan (江浩川)^b, Chen Bao-Jiu (陈宝玖)^c

a Key Laboratory of Photoelectronic Materials, Ningbo University, Ningbo 315211, China;
b Ningbo Institute of Materials Technology and Engineering, the Chinese Academy of Sciences, Ningbo 315211, China;
c Department of Physics, Dalian Maritime University, Dalian 116026, China

Received:2014-11-09 Revised:2015-01-04 Online:2015-06-05 Published:2015-06-05
Contact: Xia Hai-Ping E-mail:hpxcm@nbu.edu.cn
About author:78.60.Lc; 78.55.Hx
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 51472125 and 51272109 ) and the K.C. Wong Magna Fund in Ningbo University, China (Grant No. NBUWC001).

摘要/Abstract

摘要： Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystals with various Yb³⁺ concentrations and ～ 0.98 mol% Ho³⁺ concentration are grown by the Bridgman method under the conditions of taking LiF and YF₃ as raw materials and a temperature gradient (40 ℃/cm–50 ℃/cm) for the solid–liquid interface. The luminescent performances of the crystals are investigated through emission spectra, infrared transmittance spectrum, emission cross section, and decay curves under excitation by 980 nm. Compared with the Ho³⁺ single-doped LiYF₄ crystal, the Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal has an obviously enhanced emission band from 1850 nm to 2150 nm observed when excited by a 980-nm diode laser. The energy transfer from Yb³⁺ to Ho³⁺ and the optimum fluorescence emission around 2.0 μm of Ho³⁺ ions are investigated. The maximum emission cross section of the above sample at 2.0 μm is calculated to be 1.08× 10^-20 cm² for the LiYF₄ single crystal of 1-mol% Ho³⁺ and 6-mol% Yb³⁺ according to the measured absorption spectrum. The high energy transfer efficiency of 88.9% from Yb³⁺ to Ho³⁺ ion in the sample co-doped by Ho³⁺ (1 mol%) and Yb³⁺ (8 mol%) demonstrates that the Yb³⁺ ions can efficiently sensitize the Ho³⁺ ions.

关键词: Ho³⁺/Yb³⁺, energy transfer, 2.0-μ emission, LiYF₄ crystal

Abstract: Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystals with various Yb³⁺ concentrations and ～ 0.98 mol% Ho³⁺ concentration are grown by the Bridgman method under the conditions of taking LiF and YF₃ as raw materials and a temperature gradient (40 ℃/cm–50 ℃/cm) for the solid–liquid interface. The luminescent performances of the crystals are investigated through emission spectra, infrared transmittance spectrum, emission cross section, and decay curves under excitation by 980 nm. Compared with the Ho³⁺ single-doped LiYF₄ crystal, the Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal has an obviously enhanced emission band from 1850 nm to 2150 nm observed when excited by a 980-nm diode laser. The energy transfer from Yb³⁺ to Ho³⁺ and the optimum fluorescence emission around 2.0 μm of Ho³⁺ ions are investigated. The maximum emission cross section of the above sample at 2.0 μm is calculated to be 1.08× 10^-20 cm² for the LiYF₄ single crystal of 1-mol% Ho³⁺ and 6-mol% Yb³⁺ according to the measured absorption spectrum. The high energy transfer efficiency of 88.9% from Yb³⁺ to Ho³⁺ ion in the sample co-doped by Ho³⁺ (1 mol%) and Yb³⁺ (8 mol%) demonstrates that the Yb³⁺ ions can efficiently sensitize the Ho³⁺ ions.

Key words: Ho³⁺/Yb³⁺, energy transfer, 2.0-μ emission, LiYF₄ crystal

中图分类号: (Optically stimulated luminescence)

78.60.Lc

78.55.Hx (Other solid inorganic materials)

杨硕, 夏海平, 姜永章, 张加忠, 江东升, 王成, 冯治刚, 张健, 谷雪梅, 章践立, 江浩川, 陈宝玖. 2.0-μm emission and energy transfer of Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal excited by 980 nm[J]. 中国物理B, 2015, 24(6): 67802-067802.

Yang Shuo (杨硕), Xia Hai-Ping (夏海平), Jiang Yong-Zhang (姜永章), Zhang Jia-Zhong (张加忠), Jiang Dong-Sheng (江东升), Wang Cheng (王成), Feng Zhi-Gang (冯治刚), Zhang Jian (张健), Gu Xue-Mei (谷雪梅), Zhang Jian-Li (章践立), Jiang Hao-Chuan (江浩川), Chen Bao-Jiu (陈宝玖). 2.0-μm emission and energy transfer of Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal excited by 980 nm[J]. Chin. Phys. B, 2015, 24(6): 67802-067802.

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2.0-μm emission and energy transfer of Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal excited by 980 nm

2.0-μm emission and energy transfer of Ho³⁺/Yb³⁺ co-doped LiYF₄ single crystal excited by 980 nm

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