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超短相匹配波长和强的第二生成在深紫外线透明氧化中通过共价降低
Yilei Hu1, Chao Wu1, Xingxing Jiang2
1China-Australia Joint Research Center for Functional Molecular Materials, School of Chemical Science and Engineering, Tongji University, 200092, Shanghai, China.
Angewandte Chemie (International ed. in English)
|November 5, 2023
概括
研究人员开发了新的基于的深紫外线非线性光学材料. 这些材料表现出强烈的第二和生成和记录短相匹配波长,推进深紫外NLO材料应用.
科学领域:
- 材料科学 材料科学 材料科学
- 光学是什么?光学是什么?光学是什么?
- 固态化学 固态化学
背景情况:
- 紫外线 (UV) /深紫外线非线性光学 (NLO) 材料的开发至关重要,但受到相互矛盾的微观结构要求的挑战.
- 现有的材料往往难以平衡强烈的第二和生成 (SHG) 响应与短相匹配 (PM) 波长.
研究的目的:
- 设计具有改进光学线性和非线性的新型深紫外透明NLO材料.
- 探索使用过渡金属 (TM) 多面体的"脱"带隙工程策略.
主要方法:
- 采用了一个"脱"带隙工程策略.
- 组装过渡金属 (TM) 多面体,特别是[TaO2F4]和[TaF7],以创建新的化合物.
- 进行实验和理论研究来分析光学特性.
主要成果:
- 合成了第一个基于的深紫外线透明NLO材料:A5Ta3OF18 (A = K (KTOF),Rb (RTOF)).
- 为d0-TM中心氧化物实现了创纪录的短PM波长 (KTOF为238nm,RTOF为240nm).
- 观察到强烈的SHG反应 (2.8xKH2PO4用于KTOF,2.6xKH2PO4用于RTOF) 和足够的双断.
结论:
- 通过使用d0-TMs",去共价"策略成功地创建了高效的深紫外NLO材料.
- 这些发现扩大了深紫外线NLO材料设计的策略,并将最短的PM波长限制推向紫外线区域.
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