含平面共轭构型的非线性光学晶体  

Nonlinear Optical Crystals with Planar Conjugated Configuration

作　　者：范慧歆 罗敏[1] 叶宁 FAN Huixin;LUO Min;YE Ning(Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Institute of Functional Crystals,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]中国科学院福建物质结构研究所,福州350002 [2]天津理工大学功能晶体研究院,天津300384

出　　处：《人工晶体学报》2022年第9期1588-1597,共10页Journal of Synthetic Crystals

基　　金：国家自然科学基金(22222510,21975255,21921001)。

摘　　要：紫外非线性光学晶体是组成紫外固态激光器的关键材料。目前,紫外非线性光学晶体主要依赖硼酸盐晶体,但已有的硼酸盐晶体并不能完全满足应用需求,而进一步研发新型硼酸盐非线性光学晶体难度不断增大,因此开拓新的材料体系显得尤为迫切。从硼酸盐结构与非线性光学效应关系可知,含有平面共轭基团的硼酸盐具有大的倍频系数、合适的双折射率和短的紫外截止边等特性,因此平面共轭基团是硼酸盐非线性光学晶体的核心功能基元。基于几何构型拓展平面共轭基团研究是探索新体系紫外非线性光学晶体材料的重要思路和关键环节。基于此,本团队提出以具有平面三角共轭结构的碳酸盐、硝酸盐、胍盐和具有平面六元环共轭结构的氰尿酸氢盐、巴比妥酸氢盐等化合物为研究对象,拓展紫外非线性光学晶体材料的探索范围。本文将主要介绍本团队近年来在碳酸盐、硝酸盐、胍盐、氰尿酸氢盐、巴比妥酸氢盐紫外晶体探索方面取得的研究成果。Ultraviolet nonlinear optical(NLO)crystals are the key materials to realize the development of ultraviolet solid-state lasers.At present,NLO crystals mainly rely on borate crystals,but the existing NLO crystals could not meet the applications fully.While it is increasingly difficult to find new NLO crystals,so it is particularly urgent to develop new material systems.From the relationship between borate structures and optical and nonlinear optical properties,it can be known that borates which containing planar conjugated groups have the characteristics of large frequency doubling coefficient,suitable birefringence and short UV cut-off edge.Group with planar conjugated configuration is the core functional unit of borate NLO crystals.The study of expanding planar conjugated groups based on geometric configuration is an important idea for exploring new systems of UV nonlinear optical materials.Based on these,our team proposes to expand the exploration scope of UV NLO crystals by studying CO_(3),NO_(3),C(NH_(2))_(3) groups with planar triangular conjugated structures and HC_(3)N_(3)O_(3),H_(2)C_(4)N_(2)O_(3) groups with planar six-member ring conjuated structures.The research results obtained by our team in the exploration of UV crystals of carbonate,nitrate,guanidine,cyanurate and barbiturate in recent years are mainly introduced in this paper.

关 键 词：平面共轭构型 非线性光学晶体 碳酸盐 硝酸盐 胍盐 氰尿酸氢盐 巴比妥酸氢盐 

分 类 号：O641[理学—物理化学]