Alkaline-alkaline earth fluoride carbonate crystals ABCO3F (A = K, Rb, Cs; B = Ca, Sr, Ba) as nonlinear optical materials.
Alkaline-alkaline earth fluoride carbonate crystals ABCO3F (A = K, Rb, Cs; B = Ca, Sr, Ba) as nonlinear optical materials.
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DOI：
10.1021/ja209276a
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发表时间：
2011-11
影响因子：
15
通讯作者：
Guohong Zou;N. Ye;Ling Huang;Xinsong Lin
中科院分区：
文献类型：
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作者：
Guohong Zou;N. Ye;Ling Huang;Xinsong Lin
采用熔融助熔剂自发晶化法合成了一系列新的碱-碱土氟碳酸盐（KSrCO（3）F，RbSrCO（3）F，KCaCO（3）F，RbCaCO（3）F，CsCaCO（3）F，Cs（3）Ba（4）（CO（3））（3）F（5））。除Cs（3）Ba（4）（CO（3））（3）F（5）外，它们的晶体结构均为[AF]（∞）（A = K，Rb，Cs）和[B（CO（3））]（∞）（B = Ca，Sr）层的堆积和[CO（3）]三角形的共面排列。紫外-可见漫反射光谱研究表明，除了Cs（3）Ba（4）（CO（3））（3）F（5）的短波吸收边在210 nm左右外，其余的短波吸收边都在200 nm以下。用Kurtz和佩里技术测量了多晶样品的二次谐波产生（SHG），结果表明这些碳酸盐在可见光和紫外区都是相位匹配材料，测得的SHG系数分别是d（36）（KDP）的3.33，3.33，3.61，1.11，1.11和1.20倍。
A new series of alkaline-alkaline earth fluoride carbonates (KSrCO(3)F, RbSrCO(3)F, KCaCO(3)F, RbCaCO(3)F, CsCaCO(3)F, and Cs(3)Ba(4)(CO(3))(3)F(5)) were synthesized by spontaneous crystallization with molten fluxes. Their crystal structures, except for Cs(3)Ba(4)(CO(3))(3)F(5), exhibit the stacking of [AF](∞) (A = K, Rb, Cs) and [B(CO(3))](∞) (B = Ca, Sr) layers, and the coplanar alignment of [CO(3)] triangles. The results from the UV-vis diffuse reflectance spectroscopy study of the powder samples indicated that the short-wavelength absorption edges were all below 200 nm, except for Cs(3)Ba(4)(CO(3))(3)F(5), which is about 210 nm. Second-harmonic generation (SHG) on polycrystalline samples was measured using the Kurtz and Perry technique, which indicated that these carbonates are all phase-matchable materials in both visible and the UV region, and their measured SHG coefficients were about 3.33, 3.33, 3.61, 1.11, 1.11, and 1.20 times as large as that of d(36) (KDP), respectively.