项目名称： M-B-O-X(M:碱金属或碱土金属；X：卤素）体系中非线性光学材料的探索与性能研究

项目编号： No.51462033

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 陈兆慧

作者单位： 新疆大学

项目金额： 47万元

中文摘要： 非线性光学材料是一类重要的光电功能材料，在信息、能源、国防、军事、医学等领域具有广泛的应用前景，其作为激光光源是尤为关键的材料。因此，对于非线性光学材料的研究是功能材料领域的重要课题之一。 前期工作在卤素硼酸盐体系中生长出了Pb2B5O9Cl和Ba2B5O9Cl两种新型的非线性光学晶体，它们的非线性效应均大于2KDP,物理性能稳定。另外，基于硼氧基团结构多样；卤素离子能拓宽材料的透光范围；碱（土）金属阳离子无d-d电子跃迁等特性，本项目拟选择M-B-O-X（M：碱金属或碱土金属；X:卤素）体系作为研究对象。该体系易得到具有硼氯钙石结构的化合物，将会有较大的几率获得非中心对称的化合物。通过对该体系的非线性光学材料的探索，分析各个功能基团对性能的影响，并通过计算化合物的偶极矩及非线性系数等与实验结论相互印证。本项目的成功实施将丰富硼酸盐非线性光学材料，为探索新型硼卤酸盐晶体提供理论依据。

中文关键词： 晶体生长；非线性光学晶体；光学性能

英文摘要： Nonlinear optical materials are important photoelectric functional materials, which have broad application prospects in information, energy resources, national defence, military affairs, medicine and other fields and they are key materials as laser light sources. As a result, the research of nonlinear optical materials is an important task in function matarials field. Previously, we have synthesized two new nonlinear optical crystals Pb2B5O9Cl and Ba2B5O9Cl in haloid borate ,which exhibit a second harmonic response more than twice that of KH2PO4 (KDP) and have stable physical features. We selected M-B-O-X (M: alkali or alkaline-earth metals; X: halogen) system as research subject because of the following reasons:Borate has rich chemistry structure; Halogen atoms can widen the transparency of borates in the UV;The alkali(alkaline-earth) metals have no d-d electron transitions and are ideal for the transmission of UV light. The system is easy to obtain compounds with hilgardite-type noncentrosymmetric structure. We can analyze effects of various functional groups on the properties of the compounds by exploring the nonlinear optical materials in the system and confirm the experimental conclusion by calculating dipole moment and the nonlinear coefficient etc. The successful implementation of this project will enrich the borate crystal materials and provide new theoretical basis for the exploration of new nonlinear borate crystals.

英文关键词： crystal growth;nonlinear optical crystal;optical properties