新型抗辐射GYSGG晶体的Raman光谱研究  

Study on the Raman Spectra of a New Type Gysgg Radiation Resistant Crystal

作　　者：方忠庆 孙敦陆 罗建乔 张会丽 赵绪尧 权聪 胡伦珍 程毛杰 张庆礼 殷绍唐 

机构地区：[1]中国科学院安徽光学精密机械研究所,安徽省光子器件与材料重点实验室,安徽合肥 [2]中国科学技术大学,安徽合肥 [3]电子工程学院,脉冲功率激光技术国家重点实验室,安徽合肥

出　　处：《材料科学》2017年第4期515-522,共8页Material Sciences

基　　金：国家重点发展研究计划(No.2016YFB1102301);国家自然科学基金(No.51272254,61405206,51502292);电子工程学院脉冲功率激光技术国家重点实验室开放基金(No.SKL2015KF01)支持。

摘　　要：对采用提拉法生长的新型GYSGG (Gd0.63Y2.37Sc2Ga3O12)晶体的Raman光谱进行了研究。通过与结构相同的YAG (Y3Al5O12)和GGG (Gd3Ga5O12)石榴石晶体的比较,将GYSGG的Raman振动峰与四面体、八面体及十二面体的晶体结构相联系,分类和指认了Raman光谱中13个峰对应的晶格振动模式,得到GYSGG的最大声子能量为732.1 cm?1,并通过第一性原理计算分析了GYSGG,GSGG (Gd3Sc2Ga3O12)和YSGG (Y3Sc2Ga3O12)最大声子能量差别的原因。最后在几种常见的高浓度掺Er3+激光晶体中,分析了最大声子能量对激光上下能级寿命的影响规律。本文结果可以为晶体生长微观机理的研究及激光晶体的设计提供一定的参考。Raman spectrum of a new radiation resistant GYSGG (Gd0.63Y2.37Sc2Ga3O12) crystal grown by Czo-chralski method was studied. The Raman vibration peaks are related with crystal structure of tet-rahedron, octahedron and dodecahedron by comparing with YAG (Y3Al5O12) and GGG (Gd3Ga5O12) garnet crystals with the same structure. The corresponding lattice vibration modes of 13 Raman peaks are classified and identified. The maximum phonon energy of GYSGG crystal is obtained to be 732.1 cm?1, and the different maximum phonon energy of GYSGG, GSGG (Gd3Sc2Ga3O12) and YSGG (Y3Sc2Ga3O12) by first-principles was discussed. At last, in comparison with common laser crystals high-doped with Er3+, we analyzed the influence of maximum phonon energy with energy level lifetime. Our results can provide some reference for the study of the microscopic mechanism of crystal growth and the design of the laser crystal.

关 键 词：GYSGG RAMAN光谱 最大声子能量 

分 类 号：O64[理学—物理化学]