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Transient Localized Material Properties Changes by Ultrafast Laser-Pulse Manipulation of Electron Dynamics in Micro/Nano Manufacturing

Published online by Cambridge University Press:  29 July 2011

Xin Li ,
Lan Jiang ,
Cong Wang  and
Hai-Lung Tsai
Xin Li
Affiliation:
Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
Lan Jiang*
Affiliation:
Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
Cong Wang
Affiliation:
Laser Micro/Nano Fabrication Laboratory, School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, People’s Republic of China
Hai-Lung Tsai
Affiliation:
Laser-Based Manufacturing Laboratory, Department of Mechanical and Aerospace Engineering Missouri University of Science and Technology, Rolla, MO 65409, USA
*
*Author to whom correspondence should be addressed. Electronic address: jianglan@bit.edu.cn.
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Abstract

A femtosecond (fs) pulse duration is shorter than many physical/chemical characteristic times, such as the electron-photon relaxation time, which makes it possible to control electron dynamics. This paper reviews our recent progress which proposes to change electron dynamics (selective excitation/ionization) and electron densities/temperatures in materials to control the following properties and processes: 1) the transient (femtosecond-to-picosecond time scale), localized (nanometer-to-micrometer length scale) material properties, 2) the corresponding photon absorption process, and 3) phase change mechanisms, by manipulating fs pulse-train number/delay for high-precision micro/nanoscale manufacturing.

Keywords

laser ablationlaser decompositionsimulation
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1365: Symposium TT – Laser-Material Interactions at Micro/Nanoscales , 2011 , mrss11-1365-tt01-01
Copyright
Copyright © Materials Research Society 2011

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References

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