Han Jian, Liu Kaitong, Chen Long, Li Fuming, Yang Zhihua, Zhang Fangfang, Pan Shilie, Mutailipu Miriding
Research Center for Crystal Materials CAS Key Laboratory of Functional Materials and Devices for Special Environments, Xinjiang Technical Institute of Physics and Chemistry, CAS, 40-1 South Beijing Road, Urumqi, 830011, P. R. China.
University of Chinese Academy of Sciences, Beijing, 100049, P. R. China.
Chemistry. 2023 Jan 27;29(6):e202203000. doi: 10.1002/chem.202203000. Epub 2022 Dec 8.
The polarization modulation of deep-UV light is an important process that incorporates functionality to selectively respond to light-mater interaction. Typically, optical anisotropy is foremost to the use efficiency of deep-UV birefringent crystals. Herein, a new congruently melting polyborate with extremely large birefringence (Δn =0.14@589.3 nm) and band gap (6.89 eV) is discovered as a high performance birefringent crystal, which breaks the current deadlock of deep-UV polyborates that usually show small birefringence. The rigid tetrahedra, including [ZnO ] and edge-sharing [BO ] tetrahedra, make all the planar [BO ] triangles in the lattice adopt preferential arrangement and thereby lead to an extraordinary large birefringence that is larger than all the deep-UV borates with experimentally measured values. Structural analyses with the additional theoretical calculations were used to study the origin of strong optical anisotropy in BaZnB O .
深紫外光的偏振调制是一个重要过程，它赋予了选择性响应光与物质相互作用的功能。通常，光学各向异性对于深紫外双折射晶体的使用效率至关重要。在此，一种新的具有极高双折射（Δn = 0.14@589.3 nm）和带隙（6.89 eV）的同成分熔融多硼酸盐被发现是一种高性能双折射晶体，它打破了深紫外多硼酸盐通常双折射较小的当前僵局。刚性四面体，包括[ZnO]和共边的[BO]四面体，使得晶格中所有平面[BO]三角形采取优先排列，从而导致了比所有具有实验测量值的深紫外硼酸盐都大的异常大的双折射。通过额外的理论计算进行结构分析，以研究BaZnB O 中强光学各向异性的起源。
