高质量Tb_(3)Sc_(2)Al_(3)O_(12)磁光晶体的生长及性能  

Growth and Characterization of Tb_(3)Sc_(2)Al_(3)O_(12) Magneto-optical Crystal

作　　者：郝元凯 辛显辉 刘蕾 胡强强 付秀伟[1] 贾志泰[1] 陶绪堂[1] HAO Yuan-kai;XIN Xian-hui;LIU Lei;HU Qiang-qiang;FU Xiu-wei;JIA Zhi-tai;TAO Xu-tang(State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China;School of Materials Science and Engineering,Shandong University of Technology,Zibo 255000,China)

机构地区：[1]山东大学晶体材料国家重点实验室,山东济南250100 [2]山东理工大学材料科学与工程学院,山东淄博255000

出　　处：《发光学报》2022年第7期1070-1077,共8页Chinese Journal of Luminescence

基　　金：国家自然科学基金(52002218);山东省自然科学基金(ZR2020QE031)资助项目。

摘　　要：Tb_(3)Sc_(2)Al_(3)O_(12)(TSAG)晶体具有高透过率、高激光损伤阈值、低吸收系数以及比Tb_(3)Ga_(5)O_(12)(TGG)更为优异的磁光性能,被认为是理想的磁光材料;但由于晶体在生长过程中会累积大量的热应力,并且出现成分偏析的现象,导致晶体在后期加工和使用过程中容易开裂,严重限制了该晶体的应用。本文通过优化生长工艺,采用提拉法成功生长了高质量且完整无开裂的TSAG磁光晶体。将生长所得的单晶经定向、切割及抛光后获得尺寸合适的样品,并对其热学性能和光学性能进行了系统表征。结果显示,TSAG晶体在400~1500 nm波段透过率达到84%左右,热学性能优于目前商业化应用较好的TGG晶体,在高功率下应用时变形较小且散热更快,将更好地保护器件安全。TSAG晶体的Verdet常数约为TGG晶体的1.2倍,且晶体生长过程不存在Ga_(2)O_(3)挥发等问题,制备较为简单,有望在可见近红外波段实现商业化应用。Tb_(3)Sc_(2)Al_(3)O_(12)(TSAG)crystal is attracting much attention for visible and near-infrared isolator applications due to its high transmittance,large laser damage threshold,low absorption coefficient and excellent magneto-optical properties.However,it is difficult to grow large-size crack-free single crystals.In this work,high quality TSAG crystal was successfully grown by the Czochralski method.The transmittance in the wavelength of 400-1500 nm is as high as 84%.The thermal conductivity is higher than that of commercial Tb_(3)Ga_(5)O_(12)(TGG)crystal.More importantly,the Verdent constant of TSAG is 1.2 times that of TGG crystal.Therefore,TSAG crystal is promising magneto-optical crystal for high power isolator applications.

关 键 词：TSAG 磁光 提拉法 晶体生长 激光 

分 类 号：O734[理学—晶体学]