LHPG生长YAG晶体的掺杂Nd^(3+)和Cr^(3+)浓度研究

Study of Nd^(3+)/Cr^(3+)-doping Concentration in YAG Crystal Growth by LHPG Method

以人工方式生长高质量的晶体宝石,是现今材料发展的趋势之一。由于宝石的质量还须考虑到宝石内掺杂的离子浓度高低与分布,因此探讨掺杂物浓度也是宝石晶体研究的重要课题。以低浓度钕与铬离子掺杂于钇铝石榴石(YAG)为实验材料,配合二维数值模拟分析,试图探讨激光加热基座法对晶体生长所造成的浓度变化与相关物理机制,期望能优化以LHPG或类似浮动熔区方法生长晶体的工艺流程,为提升晶体质量作出贡献。

One of the trends for material development is to grow high-quality crystal jewel by an artificial method. The controlling factors influencing the quality of the jewel include the concentration and the distribution of dopants. Thus,it is an important topic to investigate the dopants＇ concentration and distribution in crystal jewel. In this study,with a low concentration of Nd^（3＋） ion and Cr^（3＋） ion doped in yttrium aluminium garnet（ YAG）and combined with two-dimension numerical simulation analysis（ TDNSA）,the changes of concentration in Laser-heated Pedestal Growth（ LHPG） crystal were monitored and their physical mechanism was discussed. It was expected to optimize the conditions of growing crystal by LHPG or similar Floating-melting-zone method（ FMZM）,and to improve the production process and quality of crystal in industry.