Growth, optical and electrical properties of a nonlinear optical crystal NaBa4Al2B8O18Cl3
Growth, optical and electrical properties of a nonlinear optical crystal NaBa4Al2B8O18Cl3
复制标题
DOI：
10.1039/c3ce26938h
复制
发表时间：
2013-03
期刊：
影响因子：
3.1
通讯作者：
Jinzhi Fang;Kunpeng Wang;X. Ren;Jianxiu Zhang;Guochun Zhang;Ji-yang Wang;Yicheng Wu
中科院分区：
文献类型：
--
作者：
Jinzhi Fang;Kunpeng Wang;X. Ren;Jianxiu Zhang;Guochun Zhang;Ji-yang Wang;Yicheng Wu
采用新型助熔剂NaF-NaCl，采用顶种溶液生长法成功生长出尺寸为38 × 36 × 10 mm3的NaBa4Al2B8O18Cl3 （NBAC）透明晶体。在NBAC - naf - nacl准三元体系中发现了NBAC的结晶区。通过消除Fe3+杂质的外在紫外吸收，重新确定了紫外吸收边为183 nm，而不是先前报道的230 nm。利用Maker条纹技术测量了NBAC的非线性光学系数（NLO），得到d15 = 1.27d36(KDP) = 0.49 pm V−1；d33 = 2.25d36(KDP) = 0.88 pm V−1。局域偶极矩计算表明，NBAC的NLO效应可归因于ClNaBa4多面体、BO3三角形和ClBa4四面体。此外，用复I-V法测量了交流介电和电导率。
A transparent NaBa4Al2B8O18Cl3 (NBAC) crystal with dimensions of 38 × 36 × 10 mm3 was successfully grown by the top-seeded solution growth method using a new flux NaF–NaCl. The crystallization region of NBAC is revealed in a quasi-ternary system of NBAC–NaF–NaCl. By means of eliminating the extrinsic UV absorption of Fe3+ impurity, the UV absorption edge was redetermined to be 183 nm rather than the previously reported 230 nm. The nonlinear optical (NLO) coefficients of NBAC were measured by the Maker fringe technique, which gave results of d15 = 1.27d36(KDP) = 0.49 pm V−1; d33 = 2.25d36(KDP) = 0.88 pm V−1. Calculations on the local dipole moment reveal that the NLO effect of NBAC is attributable to ClNaBa4 polyhedra, BO3 triangles, and ClBa4 tetrahedra. In addition, the ac dielectric and conductivity were measured using complex I–V method.