新型长波红外非线性晶体PbIn6Te10的生长  

Growth of the new long-wave infrared nonlinear crystal PbIn6Te10

作　　者：姜鹏飞 吴海信[1] 倪友保[1] 黄昌保[1] 王振友[1] Jiang Pengfei;Wu Haixin;Ni Youbao;Huang Changbao;Wang Zhenyou(Anhui Provincial Key Laboratory of Photonic Devices and Material,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究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230031 [2]中国科学技术大学,安徽合肥230026

出　　处：《红外与激光工程》2020年第4期220-224,共5页Infrared and Laser Engineering

基　　金：国家自然科学基金(51702323);国防科技创新特区项目支持。

摘　　要：新型长波红外非线性晶体PbIn6Te10具有透光波段宽(1.3~31μm)、非线性系数大(d11=51 pm/V),双折射适宜(~0.05)等优点,在14~25μm乃至25μm以上波段具有较大应用潜力。文中通过相图分析结合具体实验,筛选出较合适的组分配比,并采用高温单温区法合成多晶,布里奇曼法生长出尺寸φ11 mm×55 mm的单晶棒。对生长的PbIn6Te10晶体进行X射线衍射、摇摆曲线、透过率等测试,结果表明,晶体为三方结构,晶格常格为a=b=1.496 1 nm,c=1.825 7 nm,生长出的单晶结晶性较好,半高宽(FHWM)约0.253°,2.5~25μm波段晶体的平均透过率在50%以上,对应收系数处于0.3~0.6 cm-1之间。The new far-IR nonlinear crystal material PbIn6Te10 has great application potential among 14-25 μm even more than 25 μm because of its special optical properties, including clear transparency(1.3-31 μm), large nonlinear coefficient(d11=51 pm/V) and suitable birefringence(~0.05). The phase diagram analysis combined with the experiment was used to select the appropriate group distribution ratio, the PbIn6Te10 polycrystal was synthesized by high temperature single-temperature zone method(STZM), and single crystal with size of φ11 mm×55 mm was grown by Bridgman Method. The as-grown crystals were characterized by X-ray diffraction,X-ray rocking curve, infrared transmittance et al. XRD analysis indicates that the crystal has a trigonal structure,the lattice constants of a, b and c are 1.496 1 nm and 1.825 7 nm, respectively. The as-grown crystal is crystallized well(FHWM=0.253°), the infrared transmission is above 50% in the spectral region of 2.5-25 μm, the coefficient is 0.3-0.6 cm-1.

关 键 词：非线性光学晶体 PbIn6Te10晶体 晶体生长 布里奇曼法 长波红外 

分 类 号：O782[理学—晶体学]