非π结合物种的统一对齐增强了深紫外光学非线性
Jing Lu1, Jia-Ning Yue2, Lin Xiong1
1Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry , Beijing Normal University , Beijing 100875 , China.
Journal of the American Chemical Society
|May 8, 2019
概括
研究人员发现了一种新的酸盐物质NaNH4PO3F·H2O, 这种材料能够有效地使深紫外线 (UV) 激光频率翻倍,克服先进光学应用的200nm壁.
科学领域:
- 材料科学
- 光学学
- 晶体学
背景情况:
- 目前的激光技术受到200纳米壁的限制,阻碍了需要深紫外线 (UV) 光的应用.
- 进步需要在紫外线和深紫外线频谱中具有透明度和相匹配性的新材料.
研究的目的:
- 为增强非线性光学性能而发现新的非π合材料.
- 为了实现深紫外线激光生成的高效频率翻倍.
主要方法:
- NaNH4PO3F·H2O的合成和表征
- 对晶体结构的研究,重点是P-F键定向和内平面异构性.
- 使用秒激光器测量双折射和评估第二波生成 (SHG) 性能.
主要成果:
- 在NaNH4PO3F·H2O中发现了前所未有的[PO3F]对齐,导致了增强的 (010) 平面异构性.
- 在酸盐和酸盐家族中达到迄今为止最大的双断率 (0.053).
- 已证明有效的SHG,产生估计最短波长为194nm的激光,对于酸盐和单酸盐来说,这是最短的.
结论:
- NaNH4PO3F·H2O具有卓越的非线性光学特性,特别是双折射和深紫外线SHG.
- 这种材料独特的P-F结合方向是提高其性能的关键.
- 这些发现为设计高性能非π合深紫外线非线性光学材料提供了途径.
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