Designing Silicates as Deep‐UV Nonlinear Optical (NLO) Materials using Edge‐Sharing Tetrahedra
Designing Silicates as Deep‐UV Nonlinear Optical (NLO) Materials using Edge‐Sharing Tetrahedra
复制标题
使用边缘共享四面体将硅酸盐设计为深紫外非线性光学 (NLO) 材料
DOI：
10.1002/ange.202001855
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发表时间：
2020
影响因子：
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通讯作者：
P. Shiv Halasyamani
中科院分区：
文献类型：
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作者：
Hongping Wu;Bingbing Zhang;Hongwei Yu;Zhanggui Hu;Jiyang Wang;Yicheng Wu;P. Shiv Halasyamani
发现新的深紫外（DUV）非线性光学（NLO）材料目前是一个巨大的挑战。报道的DUV NLO材料几乎完全是硼酸盐或磷酸盐。硅酸盐-地球的地壳的最大组成部分-被排除在外，由于其弱的二次谐波产生（SHG）的响应。我们报道了一种硅酸盐Li 2BaSiO 4，具有边缘共享的LiO 4-SiO 4四面体，实现了190 nm以下的短紫外吸收边和2.8×KDP的大SHG响应之间的平衡。 对于没有二级Jahn-Teller阳离子的硅酸盐，SHG强度最大，并且超过非同构Li 2SrSiO 4的SHG强度超过一个数量级。因此，Li 2BaSiO 4可以被视为有前途的DUV-UV NLO材料。这项研究表明，边共享四面体是发现新DUV NLO材料的新设计参数。
Discovering new deep‐ultraviolet (DUV) nonlinear optical (NLO) materials is currently a great challenge. The reported DUV NLO materials are almost exclusively borates or phosphates. Silicates—the largest constituent of the earth's crust—are excluded owing to their weak second harmonic generation (SHG) response. We report a silicate, Li2BaSiO4, with edge‐sharing LiO4–SiO4tetrahedra that achieves the balance between a short UV absorption edge, below 190 nm, and a large SHG response, 2.8×KDP. The SHG intensity is the largest for silicates without second‐order Jahn–Teller cations, and exceeds that of non‐isomorphic Li2SrSiO4by more than an order of magnitude. As such Li2BaSiO4may be seen as a promising DUV‐UV NLO material. This research indicates that edge‐sharing tetrahedra is a new design parameter for discovering new DUV NLO materials.