Non-Fourier Two-Temperature Heat Conduction Model Used to Analyze Ultrashort-Pulse Laser Processing of Nanoscale Metal Film

2014 ◽  
Vol 14 (7) ◽  
pp. 5581-5586 ◽  
Author(s):  
Ching-Yen Ho ◽  
Mao-Yu Wen ◽  
Bor-Chyuan Chen ◽  
Yu-Hsiang Tsai
Keyword(s):  
Heat Conduction ◽  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Metal Film ◽  
Conduction Model ◽  
Ultrashort Pulse Laser ◽  
Heat Conduction Model ◽  
Temperature Heat ◽  
Two Temperature

scholarly journals Simulation of the laser-material interaction of ultrashort pulse laser processing of silicon nitride workpieces and the key factors in the ablation process

2021 ◽  
Author(s):  
Babak Soltani ◽  
Faramarz Hojati ◽  
Amir Daneshi ◽  
Bahman Azarhoushang
Keyword(s):  
Mathematical Model ◽  
Laser Ablation ◽  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Laser Power ◽  
Removal Rate ◽  
Ultrashort Pulse Laser ◽  
Laser Material ◽  
Material Interaction

AbstractUnderstanding the laser ablation mechanism is highly essential to find the effect of different laser parameters on the quality of the laser ablation. A mathematical model was developed in the current investigation to calculate the material removal rate and ablation depth. Laser cuts were created on the workpiece with different laser scan speeds from 1 to 10 mm s−1 by an ultrashort pulse laser with a wavelength of about 1000 nm. The calculated depths of laser cuts were validated via practical experiments. The variation of the laser power intensity on the workpiece’s surface during laser radiation was also calculated. The mathematical model has determined the laser-material interaction mechanism for different laser intensities. The practical sublimation temperature and ablated material temperature during laser processing are other data that the model calculates. The results show that in laser power intensities (IL) higher than 1.5 × 109 W cm−2, the laser-material interaction is multiphoton ionisation with no effects of thermal reaction, while in lower values of IL, there are effects of thermal damages and HAZ adjacent to the laser cut. The angle of incidence is an essential factor in altering incident IL on the surface of the workpiece during laser processing, which changes with increasing depth of the laser cut.

Ultrashort pulse laser processing of silica at high repetition rates-from network change to residual strain

2016 ◽  
Vol 8 (2) ◽  
pp. 233-238 ◽  
Author(s):  
Felix Zimmermann ◽  
Matthieu Lancry ◽  
Anton Plech ◽  
Sören Richter ◽  
Tobias Ullsperger ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Residual Strain ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Ultrashort Pulse Laser ◽  
High Repetition ◽  
Network Change

scholarly journals Ultrashort-pulse laser processing of transparent materials: insight from numerical and semi-analytical models

2016 ◽  
Author(s):  
Nadezhda M. Bulgakova ◽  
Vladimir P. Zhukov ◽  
Inam Mirza ◽  
Yuri P. Meshcheryakov ◽  
Jan Tomáštík ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Analytical Models ◽  
Ultrashort Pulse Laser ◽  
Transparent Materials

High power parallel ultrashort pulse laser processing

2016 ◽  
Author(s):  
Arnold Gillner ◽  
Patrick Gretzki ◽  
Lasse Büsing
Keyword(s):  
Pulse Laser ◽  
High Power ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Ultrashort Pulse Laser

Analysis of Ultrashort Pulse Laser-Material Interaction Using the Two-Temperature Model

2006 ◽  
Author(s):  
Dongkyun Lee ◽  
Elijah Kannatey-Asibu
Keyword(s):  
Ultrashort Pulse ◽  
Interaction Analysis ◽  
Experimental Results ◽  
Temperature Model ◽  
Conduction Model ◽  
Ultrashort Pulse Laser ◽  
Non Linear ◽  
Analysis Strategy ◽  
Ultrashort Pulse Lasers ◽  
Two Temperature

Ultrafast or ultrashort pulse lasers are increasingly being used for micro and nano-manufacturing. Because of the extremely short pulsewidth, there is usually not enough time for energy equilibrium to be established between the electrons and lattice in metals. Thus, instead of the conventional heat conduction model, the two-temperature model (TTM) is used to analyze laser-matter interactions for ultrashort pulse lasers. However, currently available non-linear two-temperature models generally require high computation capacity and long calculation time. In this study, a laser-matter interaction analysis strategy for a simplified dimensionless linear two-temperature model (SDLTTM) with proper heat source terms is developed to provide a quick and effective analytical method. SDLTTM is derived from a non-linear TTM with an assumption of constant material properties. The analytical solutions of the SDLTTM for lattice and electron temperatures for selected heat sources are obtained in the form of infinite series, and compared with other non-linear TTMs and experimental results for the electron temperature. Good correlation is obtained with the experimental results. Finally, the limitations of the SDLTTM, which result from the linearization assumption, are discussed.

scholarly journals Effect of Ultrashort Pulse Laser Structuring of Stainless Steel on Laser-based Heat Conduction Joining of Polyamide Steel Hybrids

2016 ◽  
Vol 83 ◽  
pp. 1130-1136 ◽  
Author(s):  
Philipp Amend ◽  
Tom Häfner ◽  
Michael Gränitz ◽  
Stephan Roth ◽  
Michael Schmidt
Keyword(s):  
Stainless Steel ◽  
Heat Conduction ◽  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Ultrashort Pulse Laser ◽  
Laser Structuring

scholarly journals Impacts of Ambient and Ablation Plasmas on Short- and Ultrashort-Pulse Laser Processing of Surfaces

Micromachines ◽  
2014 ◽  
Vol 5 (4) ◽  
pp. 1344-1372 ◽  
Author(s):  
Nadezhda Bulgakova ◽  
Alexei Panchenko ◽  
Vladimir Zhukov ◽  
Sergey Kudryashov ◽  
Antonio Pereira ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Laser Processing ◽  
Ultrashort Pulse Laser
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