Key Laboratory of Functional Materials and Devices for Special Environments of CAS, Xinjiang Technical Institute of Physics & Chemistry of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices , 40-1 South Beijing Road, Urumqi 830011, China.
J Am Chem Soc. 2017 Oct 25;139(42):14885-14888. doi: 10.1021/jacs.7b08966. Epub 2017 Sep 27.
Chalcopyrite-type AgGaQ (Q = S, Se) and ZnGeP are the main commercial infrared nonlinear optical (IR NLO) crystals. Unfortunately, performance defects including low laser damage threshold (LDT), harmful two-photon absorption (TPA), or small birefringence limit their application. With this background, four new compressed chalcopyrite-like IR NLO materials LiBaMQ (M = Ge, Sn; Q = S, Se) were successfully synthesized with the typical AgGaQ as templates. Remarkably, LiBaGeS and LiBaSnS not only maintain the good NLO responses (0.5 and 0.7 × AgGaS) but also overcome low LDTs and TPA of commercial chalcopyrites, demonstrating that they satisfy critical demands as promising IR NLO candidates. All of them exhibit phase-matching abilities. Furthermore, the discovery of chalcopyrite-like compounds also provides a feasible design strategy to explore new promising IR NLO materials.
黄铜矿型 AgGaQ（Q = S、Se）和 ZnGeP 是主要的商用红外非线性光学（IR NLO）晶体。不幸的是，它们的激光损伤阈值（LDT）低、存在有害的双光子吸收（TPA）或双折射小等性能缺陷限制了它们的应用。基于这一背景，我们以典型的 AgGaQ 为模板，成功合成了四种新型压缩型黄铜矿状 IR NLO 材料 LiBaMQ（M = Ge、Sn；Q = S、Se）。值得注意的是，LiBaGeS 和 LiBaSnS 不仅保持了良好的 NLO 响应（0.5 和 0.7×AgGaS），而且克服了商用黄铜矿的低 LDT 和 TPA，表明它们满足作为有前途的 IR NLO 候选材料的关键要求。它们都表现出了匹配相位的能力。此外，对黄铜矿型化合物的发现也为探索新的有前途的 IR NLO 材料提供了可行的设计策略。
