Liu Hongkun, Wang Ying, Zhang Bingbing, Yang Zhihua, Pan Shilie
Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University 180 East Wusi Road Baoding 071002 China
CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics & Chemistry, CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices 40-1 South Beijing Road Urumqi 830011 China
Chem Sci. 2019 Nov 5;11(3):694-698. doi: 10.1039/c9sc04862f.
The design of new beryllium-free deep-ultraviolet nonlinear optical materials is important but challenging. Here, we describe a new strategy to search for such materials based on rational selection of fundamental structural units. By combining asymmetric AlOF tetrahedra and π-conjugated BO rings, a new aluminum borate fluoride, CsAlBOF was obtained. It exhibits excellent linear and nonlinear optical properties including a high optical transmittance with a cut-off edge shorter than 190 nm, large second harmonic generation intensities (2.0× KHPO, KDP), and suitable birefringence for phase-matching under 200 nm. It also has good thermal stability and can be synthesized easily in an open system.
新型无铍深紫外非线性光学材料的设计至关重要但极具挑战性。在此，我们描述了一种基于合理选择基本结构单元来寻找此类材料的新策略。通过将不对称的AlOF四面体和π共轭的BO环相结合，得到了一种新型硼铝氟化物CsAlBOF。它展现出优异的线性和非线性光学性质，包括截止边短于190 nm的高光学透过率、大的二次谐波产生强度（2.0×KHPO，KDP）以及在200 nm以下适合相位匹配的双折射。它还具有良好的热稳定性，并且可以在开放体系中轻松合成。
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