Cs3[(BOP)2(B3O7)3:通过优化阴离子和阴离子组的匹配而设计的深紫外线非线性光学晶体
Haonan Liu1, Hongping Wu1, Zhanggui Hu1
1Tianjin Key Laboratory of Functional Crystal Materials, Institute of Functional Crystal, Tianjin University of Technology, Tianjin 300384, China.
Journal of the American Chemical Society
|May 26, 2023
概括
研究人员开发了一种新的酸盐晶体CBPO,在深紫外线非线性光学 (DUV NLO) 材料中取得了突破. 这种晶体平衡了关键特性, 能够有效地产生无毒的激光.
科学领域:
- 材料科学
- 固态物理
- 激光技术
背景情况:
- 深紫非线性光学 (DUV NLO) 晶体对于产生短波长连贯光 (<200 nm) 是至关重要的.
- 现有的DUV NLO晶体难以同时实现大的第二波生成 (SHG) 响应,大带间隙,高双折射率和低增长异构性.
- KBe2BO3F2是已知的DUV NLO晶体,但它并不完全满足所有所需的特性.
研究的目的:
- 设计和合成一种超越现有材料局限性的新型DUV NLO晶体.
- 为了实现冲突性质的同时平衡:大SHG响应 - 大带间隙和大双折射 - 弱增长异构性.
- 为更安全的应用开发无的DUV NLO晶体.
主要方法:
- 通过优化阴离子对应,进行混合协调酸盐,Cs3[(BO2) 2 ((B3O7) 3 (CBPO) 的合理设计.
- 结构分析以了解晶体结构与NLO特性之间的关系.
- 合成的CBPO材料的单晶生长和特征.
主要成果:
- CBPO 呈现共平面,π 结合的 B3O7 组,导致 SHG 响应大 (3 × KDP) 和高双折射率 (0.075 @ 532 nm).
- 晶体结构具有BO4和PO4四面体,消除悬挂键并将紫外线吸收边缘移至165nm (DUV区域).
- 一个大型CBPO单晶 (20 × 17 × 8 mm3) 已成功生长,由于优化了阴离子空隙匹配,显示出减少的生长异构性.
- 使用无CBPO晶体实现了DUV连贯光的产生.
结论:
- 通过同时平衡关键性能特性,CBPO代表了DUV NLO材料的重大进步.
- 大型单晶的成功生长和DUV光的产生证实了CBPO的潜力.
- CBPO将成为下一代DUV固态激光器的材料.
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