Wide-Band-Gap Metal-Free Perovskite for Third-Order Nonlinear Optics
Wide-Band-Gap Metal-Free Perovskite for Third-Order Nonlinear Optics
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DOI：
10.1021/acsphotonics.1c00687
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发表时间：
2021-08
期刊：
影响因子：
7
通讯作者：
D. Sirbu;H. L. Tsui;Naseem Alsaif;Susana Iglesias-Porras;Yifeng Zhang;Ming Wang;Mingzhen Liu
中科院分区：
文献类型：
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作者：
D. Sirbu;H. L. Tsui;Naseem Alsaif;Susana Iglesias-Porras;Yifeng Zhang;Ming Wang;Mingzhen Liu
本文建立了最近引入的ABX3无金属钙钛矿结构在三阶非线性光学过程中的潜力。这一系列材料中的基本单元是卤化铵八面体，它包含一个大的芳香族阳离子间隔物，形成了经典的钙钛矿结构。这项工作表明，阳离子的选择是产生三阶非线性的关键，其中“MDABCO”的引入是一种非常极性的阳离子，导致三阶非线性折射率约为10-17m2W-1数量级，高激光损伤阈值为0.8 J cm-2。由于其很宽的带隙(∼5.12 eV)，该材料在可见光和近红外透射窗范围内显示出高的非线性优值。这些结果表明，在重要的可见光和近红外波段，无金属钙钛矿材料是非线性光学的极佳候选者。
This paper establishes the potential of the recently introduced ABX3metal-free perovskite structures for third-order nonlinear optical processes. The base unit in this family of materials is an ammonium halide octahedra, and it incorporates a large aromatic cation spacer forming the classic perovskite structure. This work shows that the choice of cation is key to the resulting third-order nonlinearity, where the incorporation of “MDABCO” into the structure, a very polar cation, results in a third-order nonlinear refractive index on the order of 10–17m2W–1and high laser damage threshold of 0.8 J cm–2. Owing to its very wide band gap of ∼5.12 eV, this material exhibits a high nonlinear figure of merit across the visible and near-infrared transmission windows. These results show that the metal-free family of perovskite materials is an excellent candidate for nonlinear optics in the important visible and near-infrared wavelength regimes.