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人工晶体学报 ›› 2017, Vol. 46 ›› Issue (9): 1660-1664.

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Nd3+:α~NaYF4单晶体的生长与光谱特性

张健;夏海平;江东升;王成;冯治刚;江浩川;陈宝玖   

  1. 宁波大学光电子功能材料重点实验室,宁波,315211;中国科学院宁波材料技术与工程研究所,宁波,315211;大连海事大学物理系,大连,116026
  • 出版日期:2017-09-15 发布日期:2021-01-20
  • 基金资助:
    国家自然科学基金(51772159,51472125);浙江省自然科学基金(LZ17E020001)

Growth and Spectral Properties of Nd3+Dopedα-NaYF4 Single Crystal

ZHANG Jian;XIA Hai-ping;JIANG Dong-sheng;WANG Cheng;FENG Zhi-gang;JIANG Hao-chuan;CHEN Bao-jiu   

  • Online:2017-09-15 Published:2021-01-20

摘要: 以KF为助熔剂,初始原料按照NaF:KF:YF3:NdF3=30:18:47:5的摩尔比例,采用助熔剂-坩埚下降法成功生长出了优质块体Nd3+掺杂α~NaYF4单晶体.XRD图谱表明,引入少量钕离子没有改变单晶体的立方相结构.测定了钕离子在晶体中的实际掺杂浓度为3.15mol;,相比初始掺杂浓度偏小,说明在单晶体中稀土离子存在着分凝现象.根据吸收图谱,在800nm处具有最强吸收峰,最大吸收系数α和吸收跃迁截面σabs分别为0.91cm-1和0.138×10-20cm2.在800nm激光激发下,发射光谱在800~1500nm范围内有三个峰,由4F3/2能级跃迁到4I11/2能级所产生位于1052nm处的峰值最强,测得荧光寿命为35μs.掺钕氟化钇钠晶体的光学特性表明它在中红外激光领域具有潜在的应用价值.

关键词: Nd3+;助熔剂-坩埚下降法;α~NaYF4;光谱

Abstract: The bulk single crystal of Nd 3+doped α~NaYF4 was in a molar ratio of starting material NaF:KF:YF3:NdF3 =30:18:47:5 grown by an improved flux-Bridgman method using KF as flux .XRD pattern shows that the incorporation of a small amount of Nd 3+ ions did not change the cubic phase structure of the single crystal .The actual doping concentration of Nd 3+ ions in the single crystal was determined to be 3.15mol;, which was smaller than the incorporation concentration .The results show that rare earth ions have segregation phenomenon in the crystal .According to the absorption spectrum , it can be seen that the strongest absorption peak at 800 nm.The maximum absorption coefficient αand the maximum absorption cross section σabs are respectively 0.91 cm -1 and 0.138 ×10 -20 cm2 .The emission spectrum has three peaks ranging from 800 nm to 1500 nm under 800 nm excitation .The strongest peak at 1052 nm produced by the 4 F3/2 level to the 4 I11/2 level transition .The fluorescence lifetime was measured to be 35 μs.The optical properties of Nd 3+doped NaYF4 crystal show that it has potential applications in the field of mid infrared laser .

Key words: The bulk single crystal of Nd 3+doped α~NaYF4 was in a molar ratio of starting material NaF:KF:YF3:NdF3 =30:18:47:5 grown by an improved flux-Bridgman method using KF as flux .XRD pattern shows that the incorporation of a small amount of Nd 3+ ions did not change the cubic phase structure of the single crystal .The actual doping concentration of Nd 3+ ions in the single crystal was determined to be 3.15mol;, which was smaller than the incorporation concentration .The results show that rare earth ions have segregation phenomenon in the crystal .According to the absorption spectrum , it can be seen that the strongest absorption peak at 800 nm.The maximum absorption coefficient αand the maximum absorption cross section σabs are respectively 0.91 cm -1 and 0.138 ×10 -20 cm2 .The emission spectrum has three peaks ranging from 800 nm to 1500 nm under 800 nm excitation .The strongest peak at 1052 nm produced by the 4 F3/2 level to the 4 I11/2 level transition .The fluorescence lifetime was measured to be 35 μs.The optical properties of Nd 3+doped NaYF4 crystal show that it has potential applications in the field of mid infrared laser .

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