KLi(HC_(3)N_(3)O_(3))·2H_(2)O晶体的电光效应和生长研究  

Electro-Optic Effect and Growth of KLi(HC_(3)N_(3)O_(3))·2H_(2)O Crystal

作　　者：颜涛 范雨杰 徐峰 陈昱[1] 罗敏[1] YAN Tao;FAN Yujie;XU Feng;CHEN Yu;LUO Min(Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China)

机构地区：[1]中国科学院福建物质结构研究所,福州350002

出　　处：《人工晶体学报》2023年第7期1302-1307,共6页Journal of Synthetic Crystals

基　　金：国家重点研发计划(2021YFB3601503);国家自然科学基金(22222510,52202011);福建省自然科学基金(2021J01514);中国科学院青年创新促进会(2019303)。

摘　　要：本文采用电光系数的粉末测试方法,探索发现了新型电光晶体KLi(HC_(3)N_(3)O_(3))·2H_(2)O。根据粉末样品的红外反射光谱和拉曼光谱,计算获得晶格振动对电光系数的贡献值,再加上粉末倍频效应推算的有效非线性光学系数,最终计算出KLi(HC_(3)N_(3)O_(3))·2H_(2)O的电光系数为2.37 pm/V,与商用电光晶体β-BBO相当。采用水溶液法进行晶体生长,测试不同原料生长晶体时的过热和过冷曲线,优化生长工艺,获得35 mm×25 mm×10 mm透明晶体。采用X射线定向技术辅以压电系数测量,确定了晶体形貌与各向异性生长速率的对应关系。In this work,a novel electro-optic crystal KLi(HC_(3)N_(3)O_(3))·2H_(2)O was explored by powder method.The contribution of lattice vibration was calculated by infrared reflectance spectrum and Raman spectrum.The effective nonlinear optical coefficient was estimated from the powder second harmonic generation response.Consequently,the electro-optic coefficient of KLi(HC_(3)N_(3)O_(3))·2H_(2)O is determined to be 2.37 pm/V,which is comparable to that of commercialβ-BBO.The crystal was grown by aqueous solution method.Superheating and supercooling curves were measured for different raw materials.A transparent crystal with size of 35 mm×25 mm×10 mm was obtained after optimizing the growth process.The relationship between crystal morphology and anisotropic growth rate was confirmed by means of X-ray orientation and piezoelectric coefficient measurement.

关 键 词：KLi(HC_(3)N_(3)O_(3))·2H_(2)O 电光晶体 电光系数 水溶液法 红外反射光谱 拉曼光谱 晶体生长 

分 类 号：O78[理学—晶体学] O734