强的二和三生成在1D化混合化物中
Li Yao1, Zhouxiaosong Zeng2, Chengkun Cai1
1Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China.
Journal of the American Chemical Society
|September 24, 2021
概括
具有1D结构的杂合物可增强二生成 (SHG) 和三生成 (THG). 这些新材料超越了商业非线性晶体,为先进的光学应用铺平了道路.
科学领域:
- 材料科学
- 光学学
- 固态物理
背景情况:
- 破裂晶体对称性使得非线性光学效应,如第二和生成 (SHG). 杂有机-无机金属化物是有希望的,但由于对共振增强和第三生成 (THG) 的研究有限,因此落后于传统晶体.
- 目前的非线性光学材料往往缺乏SHG和THG高效共振增强所需的特定结构和电子特性.
研究的目的:
- 设计和研究具有1D晶体结构的合混合化物,以增强非线性光学特性.
- 通过共振增强机制探索这些材料的高效SHG和THG的潜力.
- 将这些新材料的非线性性能与已知的非线性晶体进行比较.
主要方法:
- 设计和合成具有固有的不对称性和1D晶体结构的杂化物.
- 对它们的光学和电子特性进行表征,重点关注激子的行为和波段能量水平.
- 测量和比较有效的第二和生成 (SHG) 和第三和生成 (THG) 灵敏度在1550 nm.
主要成果:
- 与商业LiNbO3 (χ(2) ∼83.4 pm V-1相比,合成的奇拉 bismuth 化物具有更高的SHG敏感性.
- 这些材料表现出强烈的自由激子,广泛的自我捕获激子 (STE) 和离散的能量水平,促进了共振增强.
- 值得注意的是,它们的THG强度高于SHG强度,有效THG易感性 (χ(3) ∼9.0 × 106 pm2 V-2) 显著超过WS2等参考材料.
结论:
- 由于其独特的结构和电子特性,二氧化对非线性光学应用非常有希望.
- 在这些材料中观察到的SHG和THG的共振增强为开发高性能非线性光学设备开辟了新的途径.
- 这些发现为高效的频率转换建立了一个新的材料类别,超越了当前的基准.
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