Molecular-dynamics simulations of picosecond pulsed laser ablation and desorption of silicon

2000 ◽  
Author(s):  
Patrick Lorazo ◽  
Laurent J. Lewis ◽  
Michel Meunier
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulations ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Dynamics Simulations

scholarly journals Molecular Dynamics Simulations of Crater Formation Induced by Laser Ablation on the Surface of α-Fe Substrate

2018 ◽  
Vol 167 ◽  
pp. 03011
Author(s):  
Jenn-Kun Kuo ◽  
Pei-Hsing Huang ◽  
Shih-Kai Chien ◽  
Kuang-Yao Huang ◽  
Kun-Tso Chen
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Surface Morphology ◽  
Laser Fluence ◽  
Pulsed Laser ◽  
Md Simulations ◽  
Crater Formation ◽  
Thermal Vaporization ◽  
Dynamics Simulations ◽  
Pulsed Laser Irradiation

In this study, we employed molecular dynamics (MD) simulations to investigate ablation induced by the application of pulsed laser irradiation to a thin α-Fe substrate. We observed several mechanisms underlying the removal of material, including ultrafast melting, cluster ejection, and thermal vaporization. We also examined the effects of laser fluence on the resulting surface morphology as well as the amount of material ablated and deposited around the craters

Molecular dynamics simulations studies of laser ablation in metals

2012 ◽  
Author(s):  
Johannes Roth ◽  
Steffen Sonntag ◽  
Johannes Karlin ◽  
Carolina Trichet Paredes ◽  
Marc Sartison ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulations ◽  
Dynamics Simulations

Molecular Dynamics Simulation of the Ablation Process in Ultrashort Pulsed Laser Machining of Polycrystalline Diamond

2012 ◽  
Vol 500 ◽  
pp. 351-356 ◽  
Author(s):  
Zeng Qiang Li ◽  
Jun Wang ◽  
Qi Wu
Keyword(s):  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulation ◽  
Grain Boundaries ◽  
Laser Energy ◽  
Pulsed Laser ◽  
Polycrystalline Diamond ◽  
Pulsed Laser Ablation ◽  
Dynamics Simulation ◽  
Ultrashort Pulsed Laser

The mechanism of ultrashort pulsed laser ablation of polycrystalline diamond (PCD) is investigated using molecular dynamics simulation. The simulation model provides a detailed atomic-level description of the laser energy deposition to PCD specimens and is verified by an experiment using 300 fs laser irradiation of a PCD sample. It is found that grain boundaries play an important role in the laser ablation. Melting starts from the grain boundaries since the atoms in these regions have higher potential energy and are melted more easily than the perfect diamond. Non-homogeneous melting then takes place at these places, and the inner crystal grains melt more easily in liquid surroundings presented by the melting grain boundaries. Moreover, the interplay of the two processes, photomechanical spallation and evaporation, are found to account for material removal in ultrashort pulsed laser ablation of PCD.

scholarly journals Free energy molecular dynamics simulations of pulsed-laser-irradiated SiO2: Si–Si bond formation in a matrix of SiO2

2005 ◽  
Vol 86 (20) ◽  
pp. 201910 ◽  
Author(s):  
Mauro Boero ◽  
Atsushi Oshiyama ◽  
Pier Luigi Silvestrelli ◽  
Kouichi Murakami
Keyword(s):  
Molecular Dynamics ◽  
Free Energy ◽  
Molecular Dynamics Simulations ◽  
Bond Formation ◽  
Pulsed Laser ◽  
Dynamics Simulations

Molecular-Dynamics Simulations of Laser-Ablation and Ionassisted Thin Film Deposition

1992 ◽  
Vol 285 ◽  
Author(s):  
H. Feil ◽  
J.S.C. Kools ◽  
J. Dieleman
Keyword(s):  
Thin Film ◽  
Molecular Dynamics ◽  
Laser Ablation ◽  
Molecular Dynamics Simulations ◽  
Film Growth ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Laser Fluences ◽  
Cu Thin Film ◽  
Dynamics Simulations

ABSTRACTMolecular dynamics simulations are performed of Cu thin film growth on Cu (111). Ion-Assisted Deposition is simulated by bombarding the substrate with Cu+ ions with a kinetic energy of 80 eV, while 1 eV Cu atoms are used for the simulation of Laser Ablation Deposition. It appears that Ion-Assisted Deposition leads to sputtering, enhanced surface mobility, surface disorder, mixing and rather deep damage. This is discussed in some detail. Laser Ablation Deposition, using laser fluences just above the ablation threshold, does not lead to damage and mixing. Sharper interfaces and more perfect heterostructures and superlattices can be produced using Laser Ablation Deposition.

scholarly journals Molecular dynamics simulations of pulsed laser crystallization of amorphous silicon ultrathin films

2010 ◽  
Vol 59 (8) ◽  
pp. 5681
Author(s):  
Chen Gu-Ran ◽  
Song Chao ◽  
Xu Jun ◽  
Wang Dan-Qing ◽  
Xu Ling ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Amorphous Silicon ◽  
Ultrathin Films ◽  
Pulsed Laser ◽  
Laser Crystallization ◽  
Dynamics Simulations
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