KBi_4F_(13):一个具有高激光损伤阈值的中红外非线性光学材料  

KBi_4F_(13): An Infrared Nonlinear Optical Material with High Laser Damage Threshold

作　　者：吴奇[1] 刘宏鸣[1] 姜方超 孟祥高[2] 陈兴国[1] 杨蕾[3] 胡章贵[3] 秦金贵[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072 [2]华中师范大学化学学院,武汉430079 [3]中国科学院理化技术研究所,北京100190

出　　处：《无机化学学报》2015年第9期1875-1880,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金重大研究计划重点支持项目(No.91022036);国家重点基础研究计划(973计划)(No.2010CB630701)资助项目

摘　　要：通过KF和Bi2O3在HF的水溶液中的水热反应合成了化合物KBi4F13,首次用X-射线单晶衍射技术鉴定了它的晶体结构。对它进行了XRD、ATR-FTIR、UV-Vis-NIR、TG、SHG测试。测试结果表明该化合物具有能够相位匹配的二阶非线性光学性能,其粉末倍频效应强度约为KDP的一半;粉末激光损伤阈值为120 MW·cm-2,远远高于同等条件下测试的商品化红外非线性光学材料Ag Ga S2的粉末激光损伤阈值(5 MW·cm-2);粉末的红外吸收边可达20μm;热分解温度为220℃。以上结果表明该物是有潜在应用价值的具有高激光损伤阈值的中红外非线性光学晶体材料。KBi4F13 was synthesized by hydrothermal reaction of KF and Bi203 in aqueous solution of HF. Its crystal structure was determined by X-ray diffraction on the single crystal for the first time. Its potential as a new mid-IR nonlinear optical （NLO） material has been investigated. Its powders exhibit a phase-matchable second harmonic generation （SHG） effect as strong as a half of KDP. The laser damage threshold （LDT） value of its powders is measured to be 120 MW cm-2, which is much higher than that of the currently commercialized IR NLO material AgGaS2 （5 MW. cm-2, measured in the same condition）. Its powders show the transparent window in infrared region up to 20 μm, and it is thermally stable up to 220 ℃. These results indicate that KBiaF13 is a potentially useful new mid-IR NLO material with a high LDT. CCDC： 1403665.

关 键 词：含Bi卤化物 单晶结构 非线性光学材料 激光损伤阈值 中红外波段 

分 类 号：O614.113[理学—无机化学] O614.532[理学—化学]