CsZn2BO3X2(X-2=F-2, Cl-2, and FCl): A Series of Beryllium-Free Deep-Ultraviolet Nonlinear-Optical Crystals with Excellent Properties
CsZn2BO3X2(X-2=F-2, Cl-2, and FCl): A Series of Beryllium-Free Deep-Ultraviolet Nonlinear-Optical Crystals with Excellent Properties
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CsZn2BO3X2(X-2=F-2、Cl-2和FCl)：一系列具有优异性能的无铍深紫外非线性光学晶体
DOI：
10.1002/anie.202008346
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Wu Yicheng
中科院分区：
文献类型：
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作者：
Zhou Jinjie;Liu Youquan;Wu Hongping;Yu Hongwei;Lin Zheshuai;Hu Zhanggui;Wang Jiyang;Wu Yicheng
设计深紫外非线性光学晶体是当前的主要研究方向之一，但面临着巨大的挑战。为了克服目前唯一适用于深紫外非线性光学晶体KBe 2BO 3F 2（KBBF）的晶体生长和BeO原料毒性问题，我们在KBBF结构中用Zn 2+取代Be 2+阳离子，并对卤素阴离子进行修饰，成功合成了三种新的含锌KBBF-类化合物CsZn 2BO 3X 2（X2=F2，Cl 2，FCl）。它们都表现出优异的非线性光学特性，包括改善的二次谐波响应（2.8-3.5×KDP）和较短的紫外截止边（<190 nm）。 与KBBF相比，CsZn_2BO_3X_2（X_2 = F_2，Cl_2，FCl）晶体化学性质良好，生长习性好，是一种很有前途的深紫外非线性光学晶体。进一步的结构-性能关系研究表明，卤素阴离子的混合是一个可行的策略，以提高KBBF家族的SHG响应。
Designing deep‐ultraviolet (DUV) nonlinear‐optical (NLO) crystals is one of the major current research interests, but it faces a great challenge. In order to overcome the problem of crystal growth and the toxicity of BeO raw materials in KBe2BO3F2(KBBF), the only applicable DUV NLO crystal so far, we substitute Be2+cations with Zn2+in the KBBF structure and modify the halogen anions, by which three new Zn‐containing KBBF‐like compounds, CsZn2BO3X2(X2=F2, Cl2, and FCl), have been successfully synthesized. They all exhibit excellent NLO properties, including improved SHG responses (2.8–3.5×KDP) and short UV cut‐off edges (<190 nm). In comparison with KBBF, CsZn2BO3X2(X2=F2, Cl2, and FCl) are all chemically benign and have better growth habits, so they are all promising as DUV NLO crystals. Further study on structure–property relationships indicates that the mixing of halogen anions is a feasible strategy to enhance the SHG responses of the KBBF family.