氟硼酸钡族紫外非线性光学材料的研究

项目名称： 氟硼酸钡族紫外非线性光学材料的研究

项目编号： No.21201176

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 无机化学

项目作者： 吴红萍

作者单位： 中国科学院新疆理化技术研究所

项目金额： 25万元

中文摘要： 短波长激光光源在信息、能源、工业制造、军事等领域具有广泛的应用前景，而紫外非线性光学晶体是获得短波长激光光源的关键材料。 本课题组通过前期研究，合成出一种新型非线性光学材料氟硼酸钡Ba3B6O11F2，其紫外截止边低于190nm，倍频效应约为3KDP，物化性能稳定。基于硼氧基团结构多样；碱土金属阳离子无d-d电子跃迁；氟离子能拓宽材料的透光范围等特点，本项目拟引入氟离子到碱土金属硼酸盐体系，采用高温熔液法合成出系列氟硼酸钡族化合物。筛选出新型紫外非线性光学材料，探讨功能基元的组合对晶体结构的影响，系统研究材料的组成-晶体结构-光学性能之间的关系，揭示阴离子基团对非线性效应的贡献，氟离子对其紫外吸收边的影响；分析氟硼酸钡族化合物之间的内在联系，总结其晶体结构与其性能之间的关系和规律，进而为氟硼酸钡族材料的设计与合成提供实验依据和理论基础。

中文关键词： 非线性光学晶体；紫外；氟硼酸钡；结构-性能关系；晶体生长

英文摘要： Ultraviolet frequency doubling material that generate UV lights effectively are important for the realization of a high-power all-solid-state UV light sourceis, which has broad application prospects in information, research, defense and other fields. Previously, we have synthesized a new nonlinear optical crystal Ba3B6O11F2. It exhibits a large second harmonic response about three times that of KH2PO4 (KDP), possesses a short UV cutoff edge (<190 nm) and has excellent physical chemical features, such as good mechanical properties, good chemical stability, and moisture resistance. Because borate has rich chemistry structure, the alkali metal-oxygen bond is ideal for the transmission of UV light because there are no d-d electron transitions in this range and halogen atoms can widen the transparency of borates in the UV, we believe that combination of the alkali cations and halide anions in the borate systems will generate a novel class of UV NLO materials. In the research, we will synthesize some new barium fluoroborate compounds, and select some new nonlinear optical crystal with wide transmission range and short ultraviolet absorption edge, study the relationships among the composition of the materials - crystal structure - optical properties, elucidate the contributions of the various functional moieties to non

英文关键词： nonlinear optical crystal；UV；barium borate fluoride；crystal growth；structure-property relationship