Two-color pump-probe interferometry of ultra-fast light-matter interaction

被引：29
作者：
Hayasaki, Yoshio [1 ]
Fukuda, Shin-ichi [1 ]
Hasegawa, Satoshi [1 ]
Juodkazis, Saulius [2 ,3 ,4 ]
机构：
[1] Utsunomiya Univ, CORE, 7-1-2 Yoto, Utsunomiya, Tochigi 3218585, Japan
[2] Swinburne Univ Technol, Ctr Microphoton, Hawthorn, Vic 3122, Australia
[3] King Abdulaziz Univ, Ctr Nanotechnol, Jeddah 21589, Saudi Arabia
[4] Australian Natl Fabricat Facil, Melbourne Ctr Nanofabricat, Clayton, Vic 3168, Australia
来源：
SCIENTIFIC REPORTS | 2017年 / 7卷
基金：
澳大利亚研究理事会;
关键词：
DIGITAL HOLOGRAPHY; FEMTOSECOND-LASER; TIME; BREAKDOWN;
D O I：
10.1038/s41598-017-10709-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
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 mu m optical resolution and approximately similar to 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 similar to 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.
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页数：8
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