双色泵浦探测干涉测量超快速光物质相互作用。
Two-color pump-probe interferometry of ultra-fast light-matter interaction.
机构信息
Center for Optical Research and Education (CORE), Utsunomiya University, 7-1-2 Yoto, Utsunomiya, 321-8585, Japan.
Centre for Micro-Photonics, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.
出版信息
Sci Rep. 2017 Sep 4;7(1):10405. doi: 10.1038/s41598-017-10709-z.
Two-color side-view probing of light-matter interaction from minute focal volume of a tightly focused fs-laser pump pulse reveals charge dynamics with high 0.9 μm optical resolution and approximately ~45fs temporal resolution defined by pulse duration. Use of two colors is advantageous for probing optically excited plasma regions with different density. Holographical digital focusing and spatial filtering were implemented to obtain the same resolution images for subsequent Fourier analysis. Fast plasma density decay with time constant ~150 fs was resolved and is consistent with self-trapping. Potential applications of an optical control over light-induced defects with deep-sub-wavelength resolution is discussed.
双色侧视探测技术可从强聚焦飞秒激光泵浦脉冲的微小焦点体积中获取光物质相互作用信息，揭示带有高 0.9μm 光学分辨率和由脉冲持续时间定义的大约45fs 时间分辨率的电荷动力学。双色探测对于探测具有不同密度的光激发等离子体区域是有利的。采用全息数字聚焦和空间滤波技术，可获得相同分辨率的图像，以便进行后续的傅里叶分析。探测到的快等离子体密度随时间常数150fs 的衰减与自陷相一致。讨论了深亚波长分辨率下光致缺陷的光学控制的潜在应用。
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