卤化物
碱金属
极地的
带隙
氧化物
结晶学
离子键合
晶体结构
材料科学
群(周期表)
离子
非线性光学
化学
无机化学
物理
光电子学
非线性系统
有机化学
量子力学
冶金
天文
作者
Hongming Li,Qi Wu,Xingxing Jiang,Zheshuai Lin,Xianggao Meng,Xingguo Chen,Jingui Qin
标识
DOI:10.1002/anie.201705672
摘要
Abstract A family of nonlinear optical materials that contain the halide, oxide, and oxyhalide polar units simultaneously in a single structure, namely ABi 2 (IO 3 ) 2 F 5 (A=K ( 1 ), Rb ( 2 ), and Cs ( 3 )), have been designed and synthesized. They crystallize in the same polar space group ( P 2 1 ) with a two‐dimensional double‐layered framework constructed by [BiF 5 ] 2− and [BiO 2 F 4 ] 5− units connected to each other by four F atoms, in which two [IO 3 ] − groups are linked to [BiO 2 F 4 ] 5− unit on the same side. A hanging Bi−F bond of [BiF 5 ] 2− unit is located on the other side via ionic interaction with the layer‐inserted alkali metal ions to form three‐dimensional structure. The well‐ordered alignments of these polar units lead to a very strong second‐harmonic generation response of 12 ( 1 ), 9.5 ( 2 ), and 7.5 ( 3 ) times larger than that of potassium dihydrogen phosphate under 1064 nm laser radiation. All of them exhibited a wide energy bandgap over 3.75 eV, suggesting that they will have a high laser damage threshold.
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