BaYOBO_(3):A deep-ultraviolet rare-earth oxy-borate with a large second harmonic generation response  

作　　者：Mengen Gao Hongping Wu Hongwei Yu Zhanggui Hu Jiyang Wang Yicheng Wu 

机构地区：[1]Tianjin Key Laboratory of Functional Crystal Materials,Institute of Functional Crystal,Tianjin University of Technology,Tianjin 300384,China

出　　处：《Science China Chemistry》2021年第7期1184-1191,共8页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(51972230,22071179,51890864,61835014,51802217,51890865);the Natural Science Foundation of Tianjin(20JCJQJC00060,19JCZDJC38200);Tianjin Science and Technology Plan Program(19ZYPTJC00070);the National Key R&D Program of China(2016YFB0402103)。

摘　　要：Deep-ultraviolet(UV)nonlinear optical(NLO)crystals with excellent performances are of great importance in laser science and technology.However,to design and synthesize an ideal deep-UV NLO material with a balance between second harmonic generation(SHG)response and UV cut-off edge is still a huge challenge.Herein,a new oxy-borate BaYOBO_(3)(BaYBO)was designed and synthesized by substituting Be^(2+)with Y^(3+)from Sr_(2)Be_(2)B_(2(O_(7).The BaYBO features a stable three-dimensional framework and satisfies the property balance between a large SHG response(~2.6×KH_(2)PO_(4)KDP))and a short UV cut-off edge(<190 nm)as a promising deep-UV NLO candidate.The study of structure-property relationship indicates that the large SHG response of BaYBO is mainly attributed to the coplanar arrangement and large number density of BO_(3 )triangles.These results demonstrate that substituting Be^(2+)with Y^(3+)cations is also a feasible strategy for developing new deep-UV NLO crystals.

关 键 词：deep-ultraviolet nonlinear optical materials second harmonic generation structure-property relationship rare-earth cation 

分 类 号：TN204[电子电信—物理电子学] TB34[一般工业技术—材料科学与工程]