Absorption Spectra of LiNbO3, Fe:LiNbO3, and Zn:Fe:LiNbO3 Crystals Grown by Bridgman Method

ZENG Xian-lin; WANG Jin-hao; XIA Hai-ping; ZHANG Jian-li; SONG Hong-wei; ZHANG Jia-hua; YA

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Absorption Spectra of LiNbO₃, Fe:LiNbO₃, and Zn:Fe:LiNbO₃ Crystals Grown by Bridgman Method

更新时间：2020-08-11

- Absorption Spectra of LiNbO₃, Fe:LiNbO₃, and Zn:Fe:LiNbO₃ Crystals Grown by Bridgman Method
- Chinese Journal of Luminescence Vol. 25, Issue 4, Pages: 435-440(2004)
- 作者机构：
  
  1. 中国科学院长春光学精密机械与物理研究所激发态物理重点实验室,吉林长春,130033
  2. 宁波大学光电子功能材料研究所,浙江宁波,315211
  3. 中国科学技术大学材料科学与工程系,安徽合肥,230026
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB381
- Received：15 June 2003，
  
  Revised：27 November 2003，
  
  Published：20 July 2004
- 稿件说明：
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曾宪林, 王金浩, 夏海平, 章践立, 宋宏伟, 张家骅, 姚连增. 坩埚下降法生长的LiNbO3,Fe:LiNbO3,Zn:Fe:LiNbO3单晶的吸收光谱特性[J]. 发光学报, 2004,25(4): 435-440

ZENG Xian-lin, WANG Jin-hao, XIA Hai-ping, ZHANG Jian-li, SONG Hong-wei, ZHANG Jia-hua, YAO Lian-zeng. Absorption Spectra of LiNbO3, Fe:LiNbO3, and Zn:Fe:LiNbO3 Crystals Grown by Bridgman Method[J]. Chinese Journal of Luminescence, 2004,25(4): 435-440
曾宪林, 王金浩, 夏海平, 章践立, 宋宏伟, 张家骅, 姚连增. 坩埚下降法生长的LiNbO3,Fe:LiNbO3,Zn:Fe:LiNbO3单晶的吸收光谱特性[J]. 发光学报, 2004,25(4): 435-440 DOI：

ZENG Xian-lin, WANG Jin-hao, XIA Hai-ping, ZHANG Jian-li, SONG Hong-wei, ZHANG Jia-hua, YAO Lian-zeng. Absorption Spectra of LiNbO3, Fe:LiNbO3, and Zn:Fe:LiNbO3 Crystals Grown by Bridgman Method[J]. Chinese Journal of Luminescence, 2004,25(4): 435-440 DOI：

摘要

用紫外可见光谱(UV/VisibleSpectra)测试并研究了坩埚下降法生长的LiNbO

、Fe:LiNbO

以及Zn:Fe:LiNbO

晶体的吸收特性。分析了产生这些吸收特性的原因以及与工艺生长方法的内在联系。研究结果表明:LiNbO

单晶沿晶体生长方向

其紫外吸收边向长波方向移动

且在350～450nm波段的吸收也逐渐增大

这是由于Li的分凝与挥发

逐渐产生缺锂所造成的;在Fe:LiNbO

单晶中观察到Fe

离子在480nm附近的特征吸收峰

并发现沿生长方向

离子的浓度逐渐增加

这与提拉法生长得到的晶体不同;在Fe:LiNbO

单晶中掺入质量分数为1.7%ZnO后

吸收边位置发生蓝移

而掺杂质量分数达到3.4%时

观察到有红移现象。Fe

离子在Zn:Fe:LiNbO

单晶中的浓度与ZnO掺杂量有密切关系。在掺杂质量分数1.7%ZnO的Fe:LiNbO

单晶中

离子从底部到顶部的浓度变化比在掺杂质量分数3.4%ZnO晶体中大

这是由于Zn

抑制Fe

离子进入Li位的能力随掺杂量的增加而逐渐减弱造成的。就该下降法工艺技术对Fe

离子在晶体中的浓度分布的影响作了分析。

Abstract

The UV/visible absorption spectra of LiNbO

Fe:LiNbO

and Zn:Fe:LiNbO

crystals grown by Bridgman method were measured and investigated.The characteristics of the absorption were explained

and the effects of growth processing on the absorption spectra were also discussed.The results indicate that the absorption edge of lithium niobate shifts to longer wavelength

and the absorption intensity in the range of 350

50nm band increases along the direction of crystal growth.The reason of above causes is lacking of lithium composition in crystal

which resulted from the volatilization and segregation of lithium in growth period.A band at 480nm which attributed to Fe

ion absorption was observed in Fe:LiNbO

crystal

and it was found that the intensity of the band increases along the growth direction

which means the increase of Fe

ion along the direction

and the incorporation of Fe in LiNbO

resulted in a red shift of absorption edge.However

the concentration of Fe

ion in the obtained crystal increases obviously compared with that of Fe:LiNbO

in same quantity of Fe dopant

which was quite different from that of crystal grown by the Czochralski method.When ZnO in

(ZnO)=1.7% was doped

a blue shift of absorption edge was observed

but a slightly red shift for

(ZnO)=3.4% ZnO.Among Fe-doped and Zn/Fe co-doped LiNbO

crystals

1.7% ZnO doped Fe:LiNbO

has biggest change of Fe

ion mass fraction from bottom to top part of crystal.A stronger suppressing effect on Fe

concentration in Zn:Fe:LiNbO

single crystals resulted from doping

(ZnO)=1.7% than

(ZnO)=3.4%.The effect of the special growth technology on the Fe

concentration was analyzed and discussed.

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