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Hydrothermal Single Crystal Growth and Second Harmonic Generation of Li 2 SiO 3 , Li 2 GeO 3 and Li 2 Si 2 O 5
Journal of Crystal Growth ( IF 1.8 ) Pub Date : 2018-07-01 , DOI: 10.1016/j.jcrysgro.2018.02.028
Rylan J. Terry , Colin D. McMillen , Xiangfeng Chen , Yimei Wen , Lin Zhu , George Chumanov , Joseph W. Kolis

Abstract The growth of large high quality single crystals of three lithium silicates and germanates Li 2 SiO 3 , Li 2 SiO 5 , and Li 2 GeO 3 is described. The crystals are all grown using hydrothermal fluids at 650 °C and 1 kbar using simple oxide feedstock and 3–6 M LiOH serving as both the lithium ion source and mineralizer. The crystals could be grown by spontaneous transport without any specific seeding, and grew between 2 and 10 mm/edge and without evidence of cracking, physical twinning or multiple domain structures. The crystals were characterized by single crystal diffraction, UV–vis spectroscopy and Raman spectroscopy. All the crystals are acentric and polar. Preliminary nonlinear optical properties were investigated using the Kurtz method and indicate that the crystals exhibit Type-1 phase matching ability, and Li 2 SiO 3 demonstrates a significant nonlinear optical conversion efficiency, making it of potential interest as a UV NLO crystal.

中文翻译:

Li 2 SiO 3 、Li 2 GeO 3 和Li 2 Si 2 O 5 的水热单晶生长和二次谐波生成

摘要 描述了三种硅酸锂和锗酸盐 Li 2 SiO 3 、Li 2 SiO 5 和 Li 2 GeO 3 的大型高质量单晶的生长。晶体全部使用热液在 650 °C 和 1 kbar 下生长,使用简单的氧化物原料和 3-6 M LiOH 作为锂离子源和矿化剂。晶体可以在没有任何特定晶种的情况下通过自发传输生长,并以 2 到 10 毫米/边的速度生长,并且没有开裂、物理孪晶或多域结构的迹象。通过单晶衍射、紫外-可见光谱和拉曼光谱对晶体进行表征。所有的晶体都是无心和极性的。使用库尔兹方法研究了初步的非线性光学特性,表明晶体表现出 1 型相位匹配能力,
更新日期:2018-07-01
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