Molecular dynamics simulation of cluster formation in femtosecond laser ablation

2013 ◽  
Author(s):  
Daiki Hatomi ◽  
Naofumi Ohnishi ◽  
Masaharu Nishikino
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulation ◽  
Femtosecond Laser ◽  
Cluster Formation ◽  
Femtosecond Laser Ablation ◽  
Dynamics Simulation

Calculation of Argon-Aluminum Interatomic Potential and Its Application in Molecular Dynamics Simulation of Femtosecond Laser Ablation

2016 ◽  
Vol 43 (8) ◽  
pp. 0802004
Author(s):  
吴寒 Wu Han ◽  
张楠 Zhang Nan ◽  
何淼 He Miao ◽  
Shih Cheng-Yu Shih Cheng-Yu ◽  
朱晓农 Zhu Xiaonong
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulation ◽  
Femtosecond Laser ◽  
Interatomic Potential ◽  
Femtosecond Laser Ablation ◽  
Dynamics Simulation

Fabrication of Metallic Wire Grating by Femtosecond Laser Ablation: A Molecular Dynamics Simulation Study

2010 ◽  
Author(s):  
Ming-Chieh Cheng ◽  
Cheng-Kuo Sung
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulation ◽  
Femtosecond Laser ◽  
Laser Fluence ◽  
Three Dimensional ◽  
Femtosecond Laser Ablation ◽  
Dynamics Simulation ◽  
Machining Processes ◽  
Ablation Mechanism

Femtosecond lasers enable materials processing with their notably characteristics, such as precision, high peak density, flexible, and minor thermal affected zone. Applications ranging from high precision micromachining to biological manipulation with no thermal damages are possibly executed via this technology. In this study, the three-dimensional molecular dynamics simulation associated with the parallel computation were utilized to explore the ablation mechanism, the trend between the femtosecond laser fluence density and laser ablation depth as well as affected zone. In addition, we also compared the ablation methods which were single ablation and superposited ablation machining processes. Moreover, the heat-affected zone effect was discussed. Ultimately, a femtosecond laser ablation manufacturing process simulation was implemented by the combination of laser fluence densities to demonstrate the feasibility of fabricating the metallic gratings.

Large Scale Molecular Dynamics Simulation of Femtosecond Laser Ablation of Silicon Using Sensing-VISICOM

2011 ◽  
Vol 418-420 ◽  
pp. 1330-1337
Author(s):  
Gang Liu ◽  
Yi Ping Yao
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulation ◽  
Laser Cutting ◽  
Large Scale ◽  
Femtosecond Laser Ablation ◽  
Parallel Simulation ◽  
Dynamics Simulation ◽  
Material Interaction ◽  
Interaction Phenomena

Silicon is widely used as substrate material for the fabrication of micro-electro and micromechanical components. Since silicon is very brittle, how to cut it into complex shapes remains a hot topic. Thanks to the small spot diameter, laser cutting is a promising alternative. However, during laser cutting, different kinds of defects can be generated depending on the beam-material interaction phenomena (ablation, melting, etc). Molecular Dynamics simulation is an effective way to study the beam-material interaction phenomena. Lots of work has been done to develop MD models of laser ablation of silicon. However, due to lack of support from high performance parallel simulation platform, the scale of the molecular systems is limited. This paper presents a component-based parallel simulation platform Sensing-VISICOM, for large scale molecular dynamics simulation. To test its runtime performance, a molecular system of femtosecond laser ablation of silicon is designed and implemented under Sensing-VISICOM. The results of the simulation show the platform can scales well to millions of atoms.

Effect of silicon target porosity on laser ablation threshold: molecular dynamics simulation

2021 ◽  
Vol 18 (7) ◽  
pp. 076001
Author(s):  
A Yu Kharin ◽  
M S Grigoryeva ◽  
I N Zavestovskaya ◽  
V Yu Timoshenko
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulation ◽  
Ablation Threshold ◽  
Dynamics Simulation ◽  
Silicon Target

Molecular Dynamics Study of Mechanism of Ablation Induced by a Femtosecond Laser Pulse

2003 ◽  
Author(s):  
Changrui Cheng ◽  
Xianfan Xu
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Laser Pulse ◽  
Femtosecond Laser ◽  
Critical Point ◽  
Change Process ◽  
Femtosecond Laser Ablation ◽  
Md Simulations ◽  
Femtosecond Laser Irradiation ◽  
Transient Temperature

In this work, molecular dynamics (MD) simulations are carried out to study femtosecond laser ablation of a metal, with an emphasis on the understanding of the mechanism of laser ablation. Theoretically, it has been shown that under intense femtosecond laser irradiation, the material can undergo a volumetric phase change process; its temperature can be close to or even above the critical point. MD simulations allow us to determine the transient temperature of the irradiated material as well as the transient thermodynamic state, which explain the mechanisms of femtosecond laser ablation.

scholarly journals Molecular dynamics simulation of vacancy cluster formation in β- and α-Si3N4

2020 ◽  
Vol 178 ◽  
pp. 109632
Author(s):  
E. Adabifiroozjaei ◽  
S.S. Mofarah ◽  
H. Ma ◽  
Y. Jiang ◽  
M. Hussein N. Assadi ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulation ◽  
Cluster Formation ◽  
Vacancy Cluster ◽  
Dynamics Simulation

Molecular Dynamics Study of Phase Change Mechanisms During Femtosecond Laser Ablation

2004 ◽  
Vol 126 (5) ◽  
pp. 727-734 ◽  
Author(s):  
Xianfan Xu ◽  
Changrui Cheng ◽  
Ihtesham H. Chowdhury
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Phase Change ◽  
Change Process ◽  
Femtosecond Laser Ablation ◽  
Femtosecond Laser Irradiation ◽  
Maximum Temperature ◽  
Transient Temperature ◽  
Phase Change Process

In this work, Molecular Dynamics (MD) simulation is employed to investigate femtosecond laser ablation of copper, with an emphasis on the understanding of the mechanism of phase change during laser ablation. Laser induced heat transfer, melting, surface evaporation, and material ablation are studied. Theoretically, it has been suggested that under intense femtosecond laser irradiation, the material undergoes a volumetric phase change process; its maximum temperature can be close to or even above the thermodynamic critical point. The MD simulations allow us to determine the transient temperature history of the irradiated material and to reveal the exact phase change process, which explains the mechanisms of femtosecond laser ablation. A finite difference calculation is also performed, which is used to compare results of heating and melting prior to a significant amount of material being ablated.

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