中文版 | English
Title

Multiscale Investigation of Femtosecond Laser Pulses Processing Aluminum in Burst Mode

Author
Corresponding AuthorJi, Pengfei
Publication Years
2018
DOI
Source Title
ISSN
1556-7265
EISSN
1556-7273
Volume22Issue:4Pages:324-347
Abstract
Megahertz is the highest femtosecond laser repetition rate that the state-of-the art technology can achieve. In this article, a single femtosecond laser pulse is burst into multiple femtosecond laser pulses to process aluminum. The temporal gap between two consecutive burst pulses is 2 picoseconds, which is much shorter than the temporal gap between two consecutive pulses at the repetition rate of megahertz. By taking the thermophysical scenarios of femtosecond laser induced of electron thermalization, electron heat conduction, electron-phonon-coupled heat transfer and atomic motion into account, a multiscale framework integrating ab initio quantum mechanical calculation, molecular dynamics and two-temperature model are constructed. The effect of femtosecond laser pulse number on the incubation phenomenon is studied. Comparing with the single pulse-processing aluminum film, the femtosecond laser in burst mode leads to smaller thermal stress, which is favorable to reduce the thermal mechanical damage of the material beneath the laser-irradiated surface. Appreciable differences among the simulation results by using electron thermophysical parameters from ab initio quantum mechanical calculation and those from experimental measurement, empirical estimation and calculation are found, indicating the essentials to precisely model the electron thermal response subject to femtosecond laser excitation.
Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
First
Funding Project
China Postdoctoral Science Foundation[2017M612653]
WOS Research Area
Thermodynamics ; Engineering ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS Subject
Thermodynamics ; Engineering, Mechanical ; Nanoscience & Nanotechnology ; Materials Science, Characterization & Testing ; Physics, Applied
WOS Accession No
WOS:000447198400004
Publisher
EI Accession Number
20183505742250
EI Keywords
Beryllium minerals ; Calculations ; Electrons ; Femtosecond lasers ; Heat conduction ; Laser excitation ; Molecular dynamics ; Phonons ; Pulse repetition rate ; Quantum theory ; Surface structure
ESI Classification Code
Minerals:482.2 ; Heat Transfer:641.2 ; Lasers, General:744.1 ; Laser Applications:744.9 ; Physical Chemistry:801.4 ; Mathematics:921 ; Quantum Theory; Quantum Mechanics:931.4
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:9
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/28272
DepartmentDepartment of Mechanical and Energy Engineering
Affiliation
1.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen Key Lab Addit Mfg High Performance Mat, Shenzhen, Peoples R China
2.South China Univ Technol, Sch Mech & Automot Engn, Guang Dong Higher Educ Inst, Key Lab Surface Funct Struct Mfg, Guangzhou 510640, Guangdong, Peoples R China
3.Univ Missouri, Dept Mech & Aerosp Engn, Columbia, MO 65211 USA
First Author AffilicationDepartment of Mechanical and Energy Engineering
First Author's First AffilicationDepartment of Mechanical and Energy Engineering
Recommended Citation
GB/T 7714
Rong, Yiming,Ji, Pengfei,He, Mengzhe,et al. Multiscale Investigation of Femtosecond Laser Pulses Processing Aluminum in Burst Mode[J]. Nanoscale and Microscale Thermophysical Engineering,2018,22(4):324-347.
APA
Rong, Yiming,Ji, Pengfei,He, Mengzhe,Zhang, Yuwen,&Tang, Yong.(2018).Multiscale Investigation of Femtosecond Laser Pulses Processing Aluminum in Burst Mode.Nanoscale and Microscale Thermophysical Engineering,22(4),324-347.
MLA
Rong, Yiming,et al."Multiscale Investigation of Femtosecond Laser Pulses Processing Aluminum in Burst Mode".Nanoscale and Microscale Thermophysical Engineering 22.4(2018):324-347.
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