Huang Xiao, Yang Si-Han, Li Xiao-Hui, Liu Wenlong, Guo Sheng-Ping
School of Chemistry and Chemical Engineering, Yangzhou University, 180 Siwangting Road, Yangzhou, 250002, China.
Angew Chem Int Ed Engl. 2022 Aug 8;61(32):e202206791. doi: 10.1002/anie.202206791. Epub 2022 Jun 28.
Metal chalcogenophosphates are receiving increasing interest, specifically as promising infrared nonlinear optical (NLO) candidates. Here, a rare-earth chalcogenophosphate Eu P S crystallizing in the monoclinic noncentrosymmetric space group Pn was synthesized using a high-temperature solid-state method. Its structure features isolated [P S ] dimer, and two types of EuS bicapped triangular prisms. Eu P S exhibits a phase-matchable second-harmonic generation (SHG) response ≈0.9×AgGaS @2.1 μm, and high laser-induced damage threshold of 3.4×AgGaS , representing the first rare-earth NLO chalcogenophosphate. The theoretical calculation result suggests that the SHG response is ascribed to the synergetic contribution of [P S ] dimers and EuS bicapped triangular prisms. This work provides not only a promising high-performance infrared NLO material, but also opens the avenue for exploring rare-earth chalcogenophosphates as potential IR NLO materials.
金属硫属磷化物正受到越来越多的关注，特别是作为有前景的红外非线性光学（NLO）候选材料。在此，采用高温固态法合成了一种在单斜非中心对称空间群Pn中结晶的稀土硫属磷化物Eu₂P₂S₅。其结构特征为孤立的[P₂S₅]二聚体和两种类型的EuS双帽三角棱柱。Eu₂P₂S₅表现出约0.9×AgGaS₂ @2.1 μm的相位匹配二次谐波产生（SHG）响应，以及3.4×AgGaS₂的高激光损伤阈值，代表了首例稀土NLO硫属磷化物。理论计算结果表明，SHG响应归因于[P₂S₅]二聚体和EuS双帽三角棱柱的协同贡献。这项工作不仅提供了一种有前景的高性能红外NLO材料，还为探索稀土硫属磷化物作为潜在的红外NLO材料开辟了道路。
