Liu Qian-Qian, Liu Xin, Wu Li-Ming, Chen Ling
Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing, 100875, P. R. China.
Center for Advanced Materials Research, Advanced Institute of Natural Sciences, Beijing Normal University, Zhuhai, 519087, P. R. China.
Angew Chem Int Ed Engl. 2022 Jul 11;61(28):e202205587. doi: 10.1002/anie.202205587. Epub 2022 May 24.
Non-linear optical chalcogenides with a wide band gap (E ) and excellent NLO properties are key materials for highly desirable multiwaveband tunable optical parametric oscillators (OPOs). We exploit the "electronic structure engineer bucket effect" to develop a novel dual-waveband SrZnGeS with an ultrawide transparency window. It exhibits an asymmetric Fdd2 structure that consists of layers formed by corner-sharing [ZnGeS ] dimers. SrZnGeS is transparent from 0.30 to 23.6 μm, spanning the UV-, vis-, mid- and far-IR spectral regions and has the widest E (3.63 eV) in the AeM M Q family to date. It exhibits phase matching, high SHG intensities (e.g., 11.0×KDP and 17.5×AGS under λ =1450 and 950 nm, respectively), and a very high laser-induced damage threshold (35×AGS). These results not only suggest bright prospects for high-power laser applications but may also enable applications of the multiwaveband OPO system from the UV-visible to far-IR regions.
具有宽带隙（E）和优异非线性光学（NLO）性能的非线性光学硫族化物是备受期待的多波段可调谐光学参量振荡器（OPO）的关键材料。我们利用“电子结构工程桶效应”开发了一种具有超宽透明窗口的新型双波段SrZnGeS。它呈现出一种不对称的Fdd2结构，该结构由通过角共享[ZnGeS]二聚体形成的层组成。SrZnGeS在0.30至23.6 μm范围内透明，跨越紫外、可见、中红外和远红外光谱区域，并且在迄今为止的AeM M Q族中具有最宽的E（3.63 eV）。它表现出相位匹配、高倍频强度（例如，在λ =1450和950 nm下分别为11.0×KDP和17.5×AGS）以及非常高的激光损伤阈值（35×AGS）。这些结果不仅为高功率激光应用预示了光明前景，还可能使多波段OPO系统在从紫外可见到远红外区域的应用成为可能。
