State Key Laboratory of Structural Chemistry , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou , Fujian 350002 , P.R. China.
Inorg Chem. 2018 Jun 18;57(12):6783-6786. doi: 10.1021/acs.inorgchem.8b00891. Epub 2018 May 29.
Two new infrared (IR) nonlinear optical (NLO) sulfides, NaGaGeS and NaGaSnS, were obtained by mixing different typical NLO-active motifs GaS and GeS/SnS in the alkali metal-containing system. The IR NLO sulfides present laser-induced damage thresholds that are 18.1 and 17.9 times that of the reference AgGaS (AGS) and second-harmonic generation efficiencies that are 0.8 and 1.1 times that of AGS. These properties originate from the GaS, GeS, and SnS tetrahedral blocks in the structures of the sulfides. Both compounds also exhibit a broad transparency range and type-I phase-matching behavior, which support their high potential in high-power laser applications. This work sheds new light on the development of promising mid-IR NLO materials by combining different NLO-active motifs.
两种新型红外（IR）非线性光学（NLO）硫化物 NaGaGeS 和 NaGaSnS 通过在含碱金属的体系中混合不同的典型 NLO 活性基元 GaS 和 GeS/SnS 而获得。这些 IR NLO 硫化物的激光诱导损伤阈值分别是参考化合物 AgGaS（AGS）的 18.1 和 17.9 倍，二次谐波产生效率分别是 AGS 的 0.8 和 1.1 倍。这些性质来源于这些硫化物结构中的 GaS、GeS 和 SnS 四面体块。这两种化合物还表现出宽的透明度范围和Ⅰ型相位匹配行为，这支持了它们在高功率激光应用中的高潜力。这项工作通过结合不同的 NLO 活性基元，为开发有前途的中红外 NLO 材料提供了新的思路。
