Er3+;LiYF4单晶生长与光谱特性

doi:10.3724/SP.J.1077.2011.00923

无机材料学报 ›› 2011, Vol. 26 ›› Issue (9): 923-928.DOI: 10.3724/SP.J.1077.2011.00923 CSTR: 32189.14.SP.J.1077.2011.00923

Er³⁺;LiYF₄单晶生长与光谱特性

於杏燕¹, 陈红兵², 王苏静², 周燕飞³, 武安华³, 戴世勋¹

(1. 宁波大学信息科学与工程学院, 宁波 315211; 2. 宁波大学材料科学与化学工程学院, 宁波315211; 3. 中国科学院上海硅酸盐研究所, 上海 200050)

收稿日期:2010-10-20 修回日期:2010-12-21 出版日期:2011-09-20 网络出版日期:2011-08-19
作者简介:於杏燕(1986-), 女, 硕士研究生. E-mail: yxyxmf2005@126.com
基金资助:
国家自然科学基金(61078056, 60878042); 浙江省杰出青年基金(R1101263); 宁波市新型光电功能材料及器件创新团队项目(2009B21007); 宁波大学王宽诚幸福基金

Growth and Spectral Properties of Er³⁺;LiYF₄ Single Crystal

YU Xing-Yan¹, CHEN Hong-Bing², WANG Shu-Jing², ZHOU Yan-Fei³, WU An-Hua³, DAI Shi-Xun¹

(1. Institute of Information Science and Engineering, Ningbo University, Ningbo 315211, China; 2. Institute of Material Science and Chemistry Engineering, Ningbo University, Ningbo 315211, China; 3. Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China)

Received:2010-10-20 Revised:2010-12-21 Published:2011-09-20 Online:2011-08-19
Supported by:
National Natural Science Foundation of China (61078056, 60878042); Excellent Youth Foundation of Zhejiang Scientific Committee (R1101263); The Ningbo Optoelectronic Materials and Devices Creative Team (2009B21007); K.C.Wong Magna Fund in Ningbo University

摘要/Abstract

摘要： 采用坩埚下降法在非真空密闭条件下生长出尺寸为9mm×68mm的1mol% Er³⁺: LiYF₄单晶材料, 测试了样品的折射率、透过光谱、吸收光谱、以及在980nm和792nm激光泵浦下的近红外和中红外荧光光谱. 应用Judd-Ofelt理论计算了Er³⁺离子在LiYF₄晶体材料中的强度参数(?t, t=2,4,6)、能级跃迁振子强度(f_cal)、自发辐射跃迁几率(A)、荧光分支比(B)、辐射寿命(t_rad)等光谱参数, 讨论了其近红外和中红外的荧光特性. 结果表明, 在980nm和792nm激光泵浦下观察到了1.5um近红外荧光和3.0um中红外荧光, 分别对应于Er³⁺: ⁴I_13/2→⁴I_15/2和⁴I_11/2→⁴I_13/2跃迁, 并分析了3.0um中红外荧光强度较弱的可能原因.

关键词: Er³⁺;LiYF₄单晶, 中红外发光, 吸收谱, 光学参数

Abstract: Er³⁺: LiYF₄ single crystal was grown by the Bridgman method under non-vacuum atmosphere. The single crystal was in size of 9mm×68mm with 1mol% concentration of Er³⁺ ions. Optical properties of the single crystal including the refractive index, UV and IR transmission spectra, absorption spectrum, near-infrared emission spectrum under 980nm excitation and mid-infrared emission spectrum under 792nm excitation were measured. The intensity parameters (?t, t=2,4,6), oscillator strength(fcal), transition probabilities (A), branching ratios (B) and radiation lifetimes (t_rad) of Er³⁺ ions in the LiYF₄ were estimated by using the Judd-Ofelt theory. The near- and mid-infrared fluorescence properties of the sample were discussed. The results indicate that near infrared fluorescence at 1.5μm corresponding to the Er³⁺: ⁴I_13/2→⁴I_15/2 transition is observed under 980nm excitation while mid-infrared fluorescence at 3.0μm corresponding to the Er³⁺: ⁴I_11/2→⁴I_13/2 transition is detected under 792 nm excitation. The reason that caused the weakening of fluorescence at 3.0μm is analyzed.

Key words: Er³⁺: LiYF₄single crystal, mid-infrared luminescence, absorption spectra, optical parameters

中图分类号:

TQ174
O482

於杏燕, 陈红兵, 王苏静, 周燕飞, 武安华, 戴世勋. Er³⁺;LiYF₄单晶生长与光谱特性[J]. 无机材料学报, 2011, 26(9): 923-928.

YU Xing-Yan, CHEN Hong-Bing, WANG Shu-Jing, ZHOU Yan-Fei, WU An-Hua, DAI Shi-Xun. Growth and Spectral Properties of Er³⁺;LiYF₄ Single Crystal[J]. Journal of Inorganic Materials, 2011, 26(9): 923-928.

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Er³⁺;LiYF₄单晶生长与光谱特性

Growth and Spectral Properties of Er³⁺;LiYF₄ Single Crystal

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