从LiNbO3元表面有效生成第二级和更高级的波
Yun Zhao1, Zhaoxi Chen2, Cheng Wang2
1State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China. ymyang@tsinghua.edu.cn.
Nanoscale
|July 19, 2023
概括
基酸的超表面有效地产生第二和生成 (SHG) 和高和生成 (HHG). 这一突破使得用于光谱和成像的紧,深紫外线连贯的白光源成为可能.
科学领域:
- 非线性光学是一种非线性光学.
- 材料科学是一种材料科学.
- 纳米光子学 纳米光子学
背景情况:
- 酸 (LiNbO3) 具有很大的非线性易感性,但在散装晶体中面临相匹配挑战,用于复杂的非线性过程,如高子生成 (HHG).
- 使用LiNbO3元表面的纳米级工程可以增强轻物质相互作用,潜在地克服散装材料的局限性.
研究的目的:
- 从尼酸盐元表面实验证明高效的第二和生成 (SHG) 和高和生成 (HHG).
- 探索用于非线性光学过程的 LiNbO3 超表面中引导模式共振的潜力.
- 研究深紫外线连贯白光源的产生.
主要方法:
- 制造酸 (LiNbO3) 的金属表面.
- 利用引导模式共振来增强非线性光物质相互作用.
- 实验测量第二和生成 (SHG) 和高和生成 (HHG) 的效率和顺序.
主要成果:
- 实现了5.1 × 10^-5 cm^2 GW^-1.的高规范化SHG效率.
- 已经证明了高波生成 (HHG) 达到了第7级.
- 产生最短波长为226nm的光,延伸到深紫外线区域.
- 在地表结构中观察到缓解的上空隙吸收.
结论:
- 带有引导模式共振的LiNbO3元表面对高效的SHG和HHG有效.
- 这种方法克服了散装LiNbO3晶体固有的相匹配限制.
- 该研究提出了一条可行的途径,用于开发紧的连贯白光源,用于深紫外光谱中的先进光谱和成像应用.
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