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Applied Sciences
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Multiscale Modelling of Laser-Induced Phenomena on Solids
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Multiscale Modelling of Laser-Induced Phenomena on Solids

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Applied Physics General".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 11719

Special Issue Editors

Dr. George D. Tsibidis

E-Mail Website
Guest Editor
Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser, Heraklion, Greece
Interests: ultrafast laser micro- and nanoprocessing; multi-scale modelling of laser-matter interactions
Prof. Dr. Tatiana E. Itina

E-Mail Website
Co-Guest Editor
Institute of Engineering and Systems Sciences (INSIS), French National Center for Scientific Research (CNRS), 75016 Paris, France
Interests: laser-matter interactions; multi-scale modelling; nanotechnology
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In laser-based processing of materials that includes surface nano- and microstructuring, high-precision cutting and drilling, nanoparticle and nanostructure formation, among many others, multiscale theoretical investigations are of paramount importance for providing a systematic and controllable means of linking the observed surface modification with the applied conditions. This Special Issue on “Multiscale Modeling of Laser-Induced Phenomena on Solids” will address advances in multiscale modeling approaches. The emphasis of this issue is on the elucidation of the role of laser parameters and how they influence physical processes on various time scales (electronic, atomistic, mesoscopic, continuum, multiscale). The objective is firstly to advance our understanding on these mechanisms and secondly to allow an accurate prediction of surface/volume morphological changes. Articles and reviews dealing with first principle analysis, atomistic simulations, molecular dynamics, Monte Carlo simulations, investigation of dynamics of out-of-equilibrium carriers, relaxation processes, fluid dynamics, plastic effects, ablation, and machine learning-based approaches are all very welcome.

Dr. George D. Tsibidis
Prof. Tatiana E. Itina
Guest Editors

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Keywords

  • laser–matter interaction
  • multiscale modeling
  • out-of-equilibrium dynamics
  • relaxation processes
  • surface modification
  • laser-induced phenomena
  • nanostructuring
  • nanoparticle formation

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Published Papers (4 papers)

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Research

43 pages, 3540 KiB  
Article
A Strategy for Achieving Smooth Filamentation Cutting of Transparent Materials with Ultrafast Lasers
by Vladimir N. Tokarev and Igor V. Melnikov
Appl. Sci. 2021, 11(4), 1732; https://doi.org/10.3390/app11041732 - 16 Feb 2021
Cited by 3 | Viewed by 2679
Abstract
A strategy is proposed for achieving a practically important mode of laser processing—a so-called “smooth” laser filamentation cutting (LFC) of transparent materials by a moving beam of a pulse-periodic pico- or subpicosecond laser. With such cutting, the surface of the sidewalls of the [...] Read more.
A strategy is proposed for achieving a practically important mode of laser processing—a so-called “smooth” laser filamentation cutting (LFC) of transparent materials by a moving beam of a pulse-periodic pico- or subpicosecond laser. With such cutting, the surface of the sidewalls of the cuts have a significantly improved smoothness, and, as a result, the laser-cut plates have increased resistance to damage and cracking due to mechanical impacts during their subsequent use. According to the proposed analytical model, for the case when each filament is formed only by a single laser pulse, the strategy of such cutting is defined by a set of necessary conditions, whose implementation requires, in turn, a certain selection and matching with each other of irradiation parameters (pulse duration and energy, repetition rate, pitch of filaments following) and of material parameters—thermal, optical and mechanical strength constants. The model shows good agreement with experiments on sapphire and tempered glass. Besides, LFC modes are also predicted that provide very high cutting speeds of the order of 1–25 m/s or more, or allow cutting with an extremely low average laser power, but still at a speed acceptable for practical applications. Full article
(This article belongs to the Special Issue Multiscale Modelling of Laser-Induced Phenomena on Solids)
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13 pages, 3284 KiB  
Article
Downscaled Finite Element Modeling of Metal Targets for Surface Roughness Level under Pulsed Laser Irradiation
by Evaggelos Kaselouris, Kyriaki Kosma, Yannis Orphanos, Alexandros Skoulakis, Ioannis Fitilis, Angelos P. Markopoulos, Makis Bakarezos, Michael Tatarakis, Nektarios A. Papadogiannis and Vasilis Dimitriou
Appl. Sci. 2021, 11(3), 1253; https://doi.org/10.3390/app11031253 - 29 Jan 2021
Cited by 6 | Viewed by 2235
Abstract
A three-dimensional, thermal-structural finite element model, originally developed for the study of laser–solid interactions and the generation and propagation of surface acoustic waves in the macroscopic level, was downscaled for the investigation of the surface roughness influence on pulsed laser–solid interactions. The dimensions [...] Read more.
A three-dimensional, thermal-structural finite element model, originally developed for the study of laser–solid interactions and the generation and propagation of surface acoustic waves in the macroscopic level, was downscaled for the investigation of the surface roughness influence on pulsed laser–solid interactions. The dimensions of the computational domain were reduced to include the laser-heated area of interest. The initially flat surface was progressively downscaled to model the spatial roughness profile characteristics with increasing geometrical accuracy. Since we focused on the plastic and melting regimes, where structural changes occur in the submicrometer scale, the proposed downscaling approach allowed for their accurate positioning. Additionally, the multiscale simulation results were discussed in relation to experimental findings based on white light interferometry. The combination of this multiscale modeling approach with the experimental methodology presented in this study provides a multilevel scientific tool for an in-depth analysis of the influence of heat parameters on the surface roughness of solid materials and can be further extended to various laser–solid interaction applications. Full article
(This article belongs to the Special Issue Multiscale Modelling of Laser-Induced Phenomena on Solids)
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24 pages, 4317 KiB  
Article
The Role of Crystalline Orientation in the Formation of Surface Patterns on Solids Irradiated with Femtosecond Laser Double Pulses
by George D. Tsibidis, Luc Museur and Andrei Kanaev
Appl. Sci. 2020, 10(24), 8811; https://doi.org/10.3390/app10248811 - 9 Dec 2020
Cited by 7 | Viewed by 2877
Abstract
A theoretical investigation of the underlying ultrafast processes upon irradiation of rutile TiO2 of (001) and (100) surface orientation with femtosecond (fs) double pulsed lasers was performed in ablation conditions, for which, apart from mass removal, phase transformation and surface modification of [...] Read more.
A theoretical investigation of the underlying ultrafast processes upon irradiation of rutile TiO2 of (001) and (100) surface orientation with femtosecond (fs) double pulsed lasers was performed in ablation conditions, for which, apart from mass removal, phase transformation and surface modification of the heated solid were induced. A parametric study was followed to correlate the transient carrier density and the produced lattice temperature with the laser fluence, pulse separation and the induced damage. The simulations showed that both temporal separation and crystal orientation influence the surface pattern, while both the carrier density and temperature drop gradually to a minimum value at temporal separation equal to twice the pulse separation that remain constant at long delays. Carrier dynamics, interference of the laser beam with the excited surface waves, thermal response and fluid transport at various pulse delays explained the formation of either subwavelength or suprawavelength structures. The significant role of the crystalline anisotropy is illustrated through the presentation of representative experimental results correlated with the theoretical predictions. Full article
(This article belongs to the Special Issue Multiscale Modelling of Laser-Induced Phenomena on Solids)
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14 pages, 2072 KiB  
Article
Preliminary Study on the Model of Thermal Laser Stimulation for Defect Localization in Integrated Circuits
by Han Yang, Rui Chen, Jianwei Han, Yanan Liang, Yingqi Ma and Hao Wu
Appl. Sci. 2020, 10(23), 8576; https://doi.org/10.3390/app10238576 - 30 Nov 2020
Cited by 5 | Viewed by 3209
Abstract
Thermal Laser Stimulation (TLS) is an efficient technology for integrated circuit defect localization in Failure Analysis (FA) laboratories. It contains Optical Beam-Induced Resistance Change (OBIRCH), Thermally-Induced Voltage Alteration (TIVA), and Seebeck Effect Imaging (SEI). These techniques respectively use the principle of laser-induced resistance [...] Read more.
Thermal Laser Stimulation (TLS) is an efficient technology for integrated circuit defect localization in Failure Analysis (FA) laboratories. It contains Optical Beam-Induced Resistance Change (OBIRCH), Thermally-Induced Voltage Alteration (TIVA), and Seebeck Effect Imaging (SEI). These techniques respectively use the principle of laser-induced resistance change and the Seebeck effect. In this paper, a comprehensive model of TLS technology is proposed. Firstly, the model presents an analytical expression of the temperature variation in Integrated Circuits (IC) after laser irradiation, which quantificationally shows the positive correlation with laser power and the negative correlation with scanning velocity. Secondly, the model describes the opposite influence of laser-induced resistance change and the Seebeck effect in the device. Finally, the relationship between the current variation measured in the experiment and other parameters, especially the voltage bias, is well explained by the model. The comprehensive model provides theoretical guidance for the efficient and accurate defect localization of TLS technology. Full article
(This article belongs to the Special Issue Multiscale Modelling of Laser-Induced Phenomena on Solids)
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