Tang Ru-Ling, Hu Chun-Li, Wu Bao-Lin, Fang Zhi, Chen Yan, Mao Jiang-Gao
Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, 350002, P. R. China.
School of Physical Science and Technology, ShanghaiTech University, Shanghai, 201210, China.
Angew Chem Int Ed Engl. 2019 Oct 21;58(43):15358-15361. doi: 10.1002/anie.201909735. Epub 2019 Sep 12.
A cesium bismuth germanate, Cs Bi O(Ge O ) (CBGO), was synthesized by a traditional high-temperature solid-state reaction. Its structure features a 3D network composed of a 1D chains composed of Bi O dimers that are further bridged by Ge O dimers, forming tunnels of seven member rings (MRs) that are filled by the Cs cations. CBGO exhibits extraordinary larger second harmonic generation (SHG) response of about 13.7 times that of KDP (KH PO ) under 1064 nm laser radiation and 1.1 times that of KTP (KTiOPO ) under 2.05 μm laser radiation, which is the highest among all of the metal germanates reported so far. CBGO possesses a moderate birefringence (0.073 at 1064 nm) and is phase matchable. Furthermore, CBGO melts congruently and exhibits high thermal stability.
通过传统高温固态反应合成了锗酸铯铋CsBiO(GeO)（CBGO）。其结构特征是一个三维网络，由BiO二聚体组成的一维链构成，这些链进一步由GeO二聚体桥连，形成由Cs阳离子填充的七元环隧道。在1064nm激光辐射下，CBGO表现出约为KDP（KH₂PO₄）13.7倍的异常大的二次谐波产生（SHG）响应，在2.05μm激光辐射下为KTP（KTiOPO₄）的1.1倍，这是迄今为止报道的所有金属锗酸盐中最高的。CBGO具有适度的双折射（1064nm处为0.073）且可实现相位匹配。此外，CBGO熔融一致且具有高热稳定性。
