Femtosecond Laser Micromachining

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "D:Materials and Processing".

Deadline for manuscript submissions: closed (31 October 2023) | Viewed by 2586

Special Issue Editor


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Guest Editor
Nuclear and Energy Research Institute, Sao Paulo 05508-000, Brazil
Interests: laser micromachining; fs laser processing; ultrashort laser pulses; laser texturing; waveguide production; laser ablation; ultrashort laser systems

Special Issue Information

Dear Colleagues,

The advent of high-intensity ultrashort laser pulses has created the possibility of new applications for lasers and also the need to understand the new phenomena observed in the interaction of this type of radiation with matter. Numerous applications have emerged as such phenomena have become understood, and special optical systems and more efficient and reliable lasers have been developed. Due to their complexity, high cost, and low productivity, these applications were for a long time restricted to research laboratories. This, however, has recently changed, and the development of more powerful, simpler, and more compact lasers is putting femtosecond laser systems in many applications in industry and other production. Thus, the main objective of this Special Issue is to expose cutting-edge applications with femtosecond lasers that are already produced on a commercial scale or that have the potential to do so.

Included in this context are the technological developments for more efficient and accurate micromachining, applications in physical, chemical, and mechanical modifications of surfaces bulk, and optical/mechanical systems and special techniques for manipulation and conformation of laser beams and computer-assisted manufacturing (CAM) that help to improve the quality of the product and its productivity.

Dr. Wagner de Rossi
Guest Editor

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 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

  • micromachining
  • texturing
  • periodic structures
  • laser micro-machining system
  • femtosecond laser material processing
  • femtosecond laser ablation
  • femtosecond technology
  • micro-/nanotechnology fabrication
  • 3D processing

Published Papers (2 papers)

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Research

12 pages, 3156 KiB  
Article
Polarization-Dependent Anisotropy of LIPSSs’ Morphology Evolution on a Single-Crystal Silicon Surface
by Mengting Liu, Baole Lu, Jing Lv, Jiang Wang, Chen Li, Guodong Zhang, Jintao Bai, Razvan Stoian and Guanghua Cheng
Micromachines 2024, 15(2), 200; https://doi.org/10.3390/mi15020200 - 29 Jan 2024
Viewed by 1125
Abstract
Utilizing the principle of laser-induced periodic surface structures (LIPSSs), this research delves into the morphological evolution of single-crystal silicon surfaces irradiated by a near-infrared picosecond laser through a scanning mode. With the increase in laser energy density, the nanostructure morphology on single-crystal silicon [...] Read more.
Utilizing the principle of laser-induced periodic surface structures (LIPSSs), this research delves into the morphological evolution of single-crystal silicon surfaces irradiated by a near-infrared picosecond laser through a scanning mode. With the increase in laser energy density, the nanostructure morphology on single-crystal silicon surfaces induced by incident lasers with different polarization directions sequentially produces high spatial-frequency LIPSSs (HSFLs) with a period of 220 nm ± 10 nm parallel to the laser polarization, low spatial-frequency LIPSSs (LSFLs) with a period of 770 nm ± 85 nm perpendicular to the direction of the polarization, and groove structures. Furthermore, by varying the angle between the laser polarization and the scanning direction, the study examined the combined anisotropic effects of the laser polarization scanning direction angle and the laser polarization crystal orientation angle on the genesis of LIPSSs on single-crystal silicon (100) surfaces. The experiments revealed polarization-related anisotropic characteristics in the morphology of HSFLs. It was found that when the polarization angle approached 45°, the regularity of the LSFLs deteriorated, the modification width decreased, and the periodicity increased. This is critical for the precise control of the LSFLs’ morphology. Full article
(This article belongs to the Special Issue Femtosecond Laser Micromachining)
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15 pages, 4557 KiB  
Article
Fundamental Considerations and Analysis of the Energy Distribution in Laser Turning with Ultrashort Laser Pulses
by Julian Zettl, Cemal Esen and Ralf Hellmann
Micromachines 2023, 14(10), 1838; https://doi.org/10.3390/mi14101838 - 27 Sep 2023
Cited by 2 | Viewed by 985
Abstract
This article discusses the process of the laser turning of rotational symmetric, cylindrical components using ultrashort laser pulses with respect to the geometrical conditions and the resulting energy distribution during the laser turning process. As a result, process predictions and potential process optimizations [...] Read more.
This article discusses the process of the laser turning of rotational symmetric, cylindrical components using ultrashort laser pulses with respect to the geometrical conditions and the resulting energy distribution during the laser turning process. As a result, process predictions and potential process optimizations are feasible. Particular attention is drawn to the laser spot formation on the cylindrical surface of the work piece in conjunction with the positioning of the laser beam relative to the rotation axis of the specimen. Based on fundamental calculations and experimental results, an optimum processing strategy is discussed, whereat the use of a trepanning optic in the laser turning process and the forming of a particular surface structure is additionally being issued. Full article
(This article belongs to the Special Issue Femtosecond Laser Micromachining)
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