scholarly journals The observation of a transient surface morphology in the femtosecond laser ablation process by using the soft x-ray laser probe (Withdrawal Notice)

2015 ◽  
Author(s):  
Noboru Hasegawa ◽  
Masaharu Nishikino ◽  
Takuro Tomita ◽  
Naofumi Ohnishi ◽  
Atsushi M. Ito ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Surface Morphology ◽  
Femtosecond Laser Ablation ◽  
Ablation Process ◽  
Laser Probe ◽  
X Ray ◽  
Laser Ablation Process

scholarly journals Micropatterning on Biodegradable Nanofiber Scaffolds by Femtosecond Laser Ablation Process

2016 ◽  
Vol 49 (6) ◽  
pp. 555-559
Author(s):  
Yongwoo Chung ◽  
Indong Jun ◽  
Yu-Chan Kim ◽  
Hyun-Kwang Seok ◽  
Seok Chung ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Ablation Process ◽  
Laser Ablation Process ◽  
Nanofiber Scaffolds

The Influence of DOS Effects on Ablation Properties in High Energy Femtosecond Laser Ablation Process

2011 ◽  
Vol 689 ◽  
pp. 11-15 ◽  
Author(s):  
Hui Li Wei ◽  
Feng Mao ◽  
Xin Yu Tan ◽  
Xiang Ping Huang ◽  
Zhao Wang ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
High Energy ◽  
Gold Target ◽  
Laser Ablation Process ◽  
Electron Phonon Coupling ◽  
Melting Threshold ◽  
Electronic Heat ◽  
The Relationship

The numerical simulation of high-energy femtosecond laser ablation on metal target is studied in this paper. Based on the two-temperature model (TTM), a new model considering the effects of the electron density of states (DOS) on electronic heat capacity, electron-phonon coupling coefficient and electronic thermal conductivity is established. As an example of gold target, the relationship between the melting threshold and the thickness of gold films is numerically calculated. Our result is more consistent with the experimental datum in contrast to the results without considering the DOS effects. This shows that the revised TTM of high-energy femtosecond laser ablation (i.e. DOS-TTM) is more reasonable compared with general used TTM.

scholarly journals Experimental verification of femtosecond laser ablation schemes by time-resolved soft x-ray reflective imaging

2012 ◽  
Vol 20 (28) ◽  
pp. 29329 ◽  
Author(s):  
Takuro Tomita ◽  
Minoru Yamamoto ◽  
Noboru Hasegawa ◽  
Kota Terakawa ◽  
Yasuo Minami ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Experimental Verification ◽  
Femtosecond Laser Ablation ◽  
Time Resolved ◽  
X Ray

X-Ray Dosimetry During Low-Intensity Femtosecond Laser Ablation of Molybdenum in Ambient Conditions

2017 ◽  
Vol 64 (9) ◽  
pp. 2519-2522
Author(s):  
Michal J. Wesolowski ◽  
Christopher C. Scott ◽  
Benjamin Wales ◽  
Ali Ramadhan ◽  
Sahr Al-Tuairqi ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Femtosecond Laser Ablation ◽  
Ambient Conditions ◽  
X Ray ◽  
Low Intensity

scholarly journals Green Wavelength Femtosecond Laser Ablated Copper Surface

2021 ◽  
Author(s):  
Yi-Hsien Liu ◽  
Chung-Wei Cheng
Keyword(s):  
Laser Ablation ◽  
Femtosecond Laser ◽  
Nonlinear Absorption ◽  
Femtosecond Laser Ablation ◽  
Electron Transition ◽  
Copper Surface ◽  
Ablation Depth ◽  
Experimental Results ◽  
Transition Effect ◽  
Laser Ablation Process

Abstract During green wavelength femtosecond laser ablation, d-band electrons are excited to become free and to participate in the absorption process. The increased electron temperature also induces the density of state shift and causes the gap between the d-band and the Fermi level to expand. The d-band electron transition effect during the laser ablation process causes nonlinear absorption, therefore, it should always be considered during simulations of laser-copper interaction.This study used a single femtosecond laser pulse with a wavelength of 515 nm and a pulse duration of 300 fs to ablate copper with fluence 0.7 - 63 J/cm2. The experimental results were compared with the theoretical results, where a modified Drude-critical point model was adopted to simulate the ablation depth. The modified model considered the electron transition effect and a two-temperature model that assumed both the linear and nonlinear absorption effect. Comparison of the experimental and simulated results revealed that the simulated ablation depth obtained using the nonlinear absorption model was consistent with the experimental results.

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