坩埚下降法生长2英寸镱掺杂钙铌镓石榴石单晶  

Growth of 2-Inch Ytterbium-Doped Calcium Niobium Gallium Garnet Single Crystal by Bridgman Method

作　　者：周霖涛 赵涛 孙志刚 姜林文 潘尚可[1] 潘建国[1] 郑燕青 ZHOU Lintao;ZHAO Tao;SUN Zhigang;JIANG Linwen;PAN Shangke;PAN Jianguo;ZHENG Yanqing(Key Laboratory of Photoelectric Detection Materials and Devices of Zhejiang Province,School of Materials Science and Chemical Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学材料科学与化学工程学院,浙江省光电探测材料及器件重点实验室,宁波315211

出　　处：《人工晶体学报》2024年第10期1669-1674,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51832009,50772121);宁波市甬江引才工程创新团队项目。

摘　　要：本文通过坩埚下降法生长了直径2英寸(1英寸=2.54 cm)的4.2%镱离子掺杂钙铌镓石榴石(Yb∶Ca_(3)(NbGa)_(5)O_(12))晶体,获得的晶体外观完整,无明显瑕疵。通过XRD测试分析了晶体的结构,该晶体为立方晶系,晶胞参数a=b=c=12.493。将该晶体定向切割获得了10 mm×10 mm×1 mm的(420)面薄片,对薄片进行两面研磨抛光得到最终样品。通过X射线衍射、紫外可见光分光光度计、荧光光谱仪等对该样品进行性能表征,结果表明获得的晶体摇摆曲线半峰全宽为43″,在近红外波长范围内透过率达到了80%,在935 nm处吸收峰半峰全宽为47.15 nm,吸收截面达到了1.53×10^(-20)cm^(2),用980 nm激光器对该样品进行激发,在1031 nm处得到发射峰,对应Yb^(3+)由^(2)F_(5/2)激发态到^(2)F_(7/2)基态的跃迁。In this paper,4.2%ytterbium-doped calcium niobium gallium garnet(Yb∶Ca_(3)(NbGa)_(5)O_(12))crystals with diameter of 2 inch(1 inch=2.54 cm)were grown by Bridgman method.The obtained crystals were intact and free of visible defects.Crystal structure was determine by XRD,which reveals that the crystal belongs to the cubic crystal system with lattice parameters a=b=c=12.493.The crystals were oriented and cut to obtain some(420)plane wafers with dimensions of 10 mm×10 mm×1 mm.These wafers were double-side polished to obtain the final samples.The performance of the samples was characterized through X-ray diffraction,ultraviolet-visible spectrophotometer,and fluorescence spectroscope.The results show that the rocking curve of the crystal has a full width at half maximum(FWHM)of 43″,and the transmittance reaches 80%in the near-infrared wavelength range.At 935 nm,FWHM of the absorption peak is 47.15 nm and absorption cross-section is 1.53×10^(-20)cm^(2).When excited with a 980 nm laser,an emission peak was observed at 1031 nm,corresponding to the transition of Yb^(3+)from the excited state^(2)F_(5/2)to the ground state_(2)F_(7/2).

关 键 词：Yb∶Ca_(3)(NbGa)_(5)O_(12) 坩埚下降法 透过率 吸收峰半峰全宽 激发发射光谱 

分 类 号：O782[理学—晶体学]