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Volume 1 Issue 3
Dec.  2019
Article Contents

Guo B S, Sun J Y, Lu Y F, Jiang L. Ultrafast dynamics observation during femtosecond laser-material interaction. Int. J. Extrem. Manuf. 1, 032004 (2019).
Citation: Guo B S, Sun J Y, Lu Y F, Jiang L. Ultrafast dynamics observation during femtosecond laser-material interaction. Int. J. Extrem. Manuf. 1, 032004 (2019).

Ultrafast dynamics observation during femtosecond laser-material interaction


doi: 10.1088/2631-7990/ab3a24
More Information
  • Publish Date: 2019-12-07
  • Femtosecond laser technology has attracted significant attention from the viewpoints of fundamental and application, especially femtosecond laser processing materials presents the unique mechanism of laser-material interaction. Ultrafast lasers can change the states and properties of materials through interactions with them, and they can be used to control the processing of materials from the micrometer scale down to the nanometer scale or across scales. Under the extreme nonequilibrium conditions imposed by femtosecond laser irradiation, many fundamental questions concerning the physical origin of the material removal process remain unanswered. In this review, cutting-edge ultrafast dynamic observation techniques for investigating the fundamental questions, including time-resolved pump-probe shadowgraphy, ultrafast continuous optical imaging, and four-dimensional ultrafast scanning electron microscopy are comprehensively surveyed. Each technique is described in depth, beginning with its basic principle, followed by a description of its representative applications in laser-material interaction and its strengths and limitations. The consideration of temporal and spatial resolutions and panoramic measurement at different scales are two major challenges. To address the challenges, the article outlines the development and prospects for the technical advancement in this field. The multiscale observation system could be used to determine the evolution of the structure and properties from electron ionization (femtosecond-picosecond scale) and material phase transition (picosecond-nanosecond scale) in a manufacturing activity in which the observations of multiscale processes have high spatial-temporal resolution, which would bring about a paradigm shift in femtosecond laser manufacturing.
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Ultrafast dynamics observation during femtosecond laser-material interaction

doi: 10.1088/2631-7990/ab3a24
  • 1 Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing, 100081, People’s Republic of China;
  • 2 Department of Electrical and Computer Engineering, University of Nebraska-Lincoln, Lincoln, NE 68588-0511, United States of America

Abstract: 

Femtosecond laser technology has attracted significant attention from the viewpoints of fundamental and application, especially femtosecond laser processing materials presents the unique mechanism of laser-material interaction. Ultrafast lasers can change the states and properties of materials through interactions with them, and they can be used to control the processing of materials from the micrometer scale down to the nanometer scale or across scales. Under the extreme nonequilibrium conditions imposed by femtosecond laser irradiation, many fundamental questions concerning the physical origin of the material removal process remain unanswered. In this review, cutting-edge ultrafast dynamic observation techniques for investigating the fundamental questions, including time-resolved pump-probe shadowgraphy, ultrafast continuous optical imaging, and four-dimensional ultrafast scanning electron microscopy are comprehensively surveyed. Each technique is described in depth, beginning with its basic principle, followed by a description of its representative applications in laser-material interaction and its strengths and limitations. The consideration of temporal and spatial resolutions and panoramic measurement at different scales are two major challenges. To address the challenges, the article outlines the development and prospects for the technical advancement in this field. The multiscale observation system could be used to determine the evolution of the structure and properties from electron ionization (femtosecond-picosecond scale) and material phase transition (picosecond-nanosecond scale) in a manufacturing activity in which the observations of multiscale processes have high spatial-temporal resolution, which would bring about a paradigm shift in femtosecond laser manufacturing.

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