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Laser Material Manufacturing
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Laser Material Manufacturing

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Optics and Lasers".

Deadline for manuscript submissions: closed (13 March 2022) | Viewed by 11841

Special Issue Editor

Dr. Mindaugas Gedvilas

E-Mail Website
Guest Editor
Department of Laser Technologies, Center for Physical Sciences and Technology, LT-02300 Vilnius, Lithuania
Interests: efficient laser ablation; two-color double-pulse irradiation; burst-mode; heat transfer in laser–matter interaction; stealth dicing; laser interference ablation; laser formation of bio-inspired functional surfaces; laser-induced periodical surface structuring (LIPSS); ripple formation; multilayer thin-film solar cell interaction with laser irradiation.
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of Applied Sciences "Laser Material Manufacturing" seeks to promote scientific and technological research from all aspects of manufacturing and material processing using ultrafast lasers, starting from basic research, to applied science, and engineering investigations. This Special Issue will publish research works concerning novel investigations and science advances connected to precision laser fabrication, laser milling technology, efficient laser ablation, bio-inspired structuring of functionalized surfaces, cold ablation, direct laser interference patterning, stealth dicing, thin-film patterning, burst mode irradiation, ablation-cooled material removal, laser coloring, and laser-induced periodical surface structuring (LIPSS).

This Special Issue will publish all types of papers: communications, articles, and reviews. The standards for submissions are of high-quality, impact, and novelty. The papers must be interesting for a wide audience in all fields of science, technology, and medicine.

Applied Sciences journal is an open access, peer-reviewed, and online-only journal publish by MDPI.

Dr. Mindaugas Gedvilas
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • ultrashort pulses
  • efficient ablation
  • burst mode
  • cold ablation
  • precision fabrication
  • laser coloring.

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Published Papers (4 papers)

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Research

8 pages, 3415 KiB  
Article
Influence of the Secondary Ion Beam Source on the Laser Damage Mechanism and Stress Evolution of IBS Hafnia Layers
by Igor Stevanovic, Zoltán Balogh-Michels, Andreas Bächli, Valentin J. Wittwer, Thomas Südmeyer, Alexander Stuck and Thomas Gischkat
Appl. Sci. 2021, 11(1), 189; https://doi.org/10.3390/app11010189 - 28 Dec 2020
Cited by 6 | Viewed by 2556
Abstract
Ion beam sputtered hafnia is a preferred high index coating material for laser applications. It exhibits a mostly amorphous structure and an adequate laser-induced damage (LIDT) threshold. In this work, we investigated the influence of an assisting ion source on the film stress [...] Read more.
Ion beam sputtered hafnia is a preferred high index coating material for laser applications. It exhibits a mostly amorphous structure and an adequate laser-induced damage (LIDT) threshold. In this work, we investigated the influence of an assisting ion source on the film stress as well as the LIDT of the sputtered hafnia layers. The stress increases with an increasing ion energy of the assisting ion beam. We identified a maximum compressive stress of 3–3.5 GPa before the film cracks, blisters, and delaminates. Different states of stress lead to different laser-induced damage thresholds and damage morphologies. Full article
(This article belongs to the Special Issue Laser Material Manufacturing)
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17 pages, 9472 KiB  
Article
Numerical Study on the Evolution Mechanism of the Crater under a Millisecond Laser
by Dongpo Zhu, Peiyun Zhang, Zhixiang Tian, Cheng Chen, Xijun Hua, Sheng Xu and Xuan Xie
Appl. Sci. 2020, 10(24), 9054; https://doi.org/10.3390/app10249054 - 18 Dec 2020
Cited by 4 | Viewed by 2170
Abstract
A two-dimensional numerical model considering recoil pressure and Hertz-Knudsen ablation rate was established on the foundation of the laser remelting model to investigate the influence of laser processing parameters on crater feature and melted zone, and it was verified through experiments. The temperature [...] Read more.
A two-dimensional numerical model considering recoil pressure and Hertz-Knudsen ablation rate was established on the foundation of the laser remelting model to investigate the influence of laser processing parameters on crater feature and melted zone, and it was verified through experiments. The temperature and flow velocity distribution of the molten pool during the formation of the crater were analyzed. The results showed that the ablation velocity could be considered under a higher laser peak power density or higher pulse width due to the metal evaporation caused by heat accumulation. The depth and diameter of the crater were significantly affected by laser peak power density and laser pulse duration. Simultaneously, the height of the edge bulge decreased with the increase in pulse duration after 1.5 ms, and the growth rate of central depth was more rapid than that of edge bulge height with the increase of laser peak power density. In the texture with the same depth, a larger melted zone could be obtained with a longer laser duration than the higher peak power density. Full article
(This article belongs to the Special Issue Laser Material Manufacturing)
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10 pages, 3884 KiB  
Article
Substrate Cleaning Processes and Their Influence on the Laser Resistance of Anti-Reflective Coatings
by Thomas Gischkat, Daniel Schachtler, Igor Stevanovic, Zoltan Balogh-Michels, Roelene Botha, Andreas Bächli, Marco Cucinelli, André Mocker, Martin Gutsche, Sven Günther, Philipp Alder and Bernd Eiermann
Appl. Sci. 2020, 10(23), 8496; https://doi.org/10.3390/app10238496 - 27 Nov 2020
Cited by 4 | Viewed by 3500
Abstract
Substrate cleaning prior to coating has a strong influence on the performance of the optical component. Exemplary, none or inadequate cleaning reduces the resistance against laser irradiation drastically. Especially in laser components coated with anti-reflective layers, the interface between substrate and coating is [...] Read more.
Substrate cleaning prior to coating has a strong influence on the performance of the optical component. Exemplary, none or inadequate cleaning reduces the resistance against laser irradiation drastically. Especially in laser components coated with anti-reflective layers, the interface between substrate and coating is one of the most limiting factors. This study investigates different precision cleaning processes and their influence on the laser resistance of ion-beam sputtered anti-reflective coatings. Therefore, a SiO2/Ta2O5 multilayer anti-reflective coating for a wavelength of 1064 nm and a normal angle of incidence was deposited onto high-quality fused silica substrates. Prior to deposition, the substrates were cleaned with various cleaning processes using different solutions and ultrasonic frequencies. To characterize the cleaned surface quality, the surfaces were analyzed with respect to root-mean-square (RMS) roughness and particle density. Laser damage was measured using a 1064 nm ns-pulsed laser test bench. It was found that an alcoholic pre-clean is recommendable to prevent laser damage caused by organic films remaining from the polishing process. The applied ultrasonic frequencies strongly influenced the particle density down to the sub-micrometer range and in consequence, the laser-induced damage threshold (LIDT). Ultrasonic cleaning at excessive power levels can reduce laser resistance. Full article
(This article belongs to the Special Issue Laser Material Manufacturing)
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13 pages, 8032 KiB  
Article
Nanosecond Laser Ablation of Ti–6Al–4V under Different Temperature
by Jiantao Zhao, Zhenge Zhu, Yacheng Xu, Xueyong Song, Yufan Wang, Hao Peng, Ying Wang, Jinrong Zuo, Xuedao Shu and Anmin Yin
Appl. Sci. 2020, 10(13), 4657; https://doi.org/10.3390/app10134657 - 6 Jul 2020
Cited by 8 | Viewed by 2854
Abstract
Multi-pulse nanosecond laser ablation of Ti–6Al–4V is a complex process. In this study, the effect of substrate temperature on the nanosecond laser ablation of Ti–6Al–4V was investigated. Morphology, diameter and depth of ablation craters were observed; ablation efficiency ω (μm3/mJ) was [...] Read more.
Multi-pulse nanosecond laser ablation of Ti–6Al–4V is a complex process. In this study, the effect of substrate temperature on the nanosecond laser ablation of Ti–6Al–4V was investigated. Morphology, diameter and depth of ablation craters were observed; ablation efficiency ω (μm3/mJ) was proposed to analyzes the ablation process. The results showed that, with the increasing of substrate temperature, the ablation craters’ diameter increased and depth decreased, while ω initially increased, but then decreased rapidly. Furthermore, with increasing pulse number, the depth of ablation crater increased linearly, while the growth of the diameter gradually slowed down and tended to be stable after the 16th irradiation. The above changes were different in details at different substrate temperatures. Full article
(This article belongs to the Special Issue Laser Material Manufacturing)
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