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Laser Micro/Nanofabrication and Related Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (20 February 2023) | Viewed by 2667

Special Issue Editors


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Guest Editor
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Interests: laser micro/nanofabrication; ultrafast and nanoscale optics; metamaterials; 3D printing

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Guest Editor
State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China
Interests: laser machining; laser direct writing; micro/nano optics

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Guest Editor
Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
Interests: nano-optics; laser writing; optical data storage
National Institute of Metrology (NIM), Beijing 100029, China
Interests: laser micro/nanofabrication; surface micro/nano structures; radiation dosimetry; relative biological effectiveness

Special Issue Information

Dear Colleagues,

In the trend of miniaturization and integration of modern devices, manufacturing technology faces increasing challenges for higher precision and quality. Recent decades witness the fast development of laser fabrication as a powerful micro/nano-scale manufacturing technology to meet these challenges. It has many unique advantages that are non-comparable by other traditional technologies.  Its precision can easily reach wavelength level and even sub-wavelength level to meet the demand of microscale or even nanoscale precision. Lasers can reach the samples without any contact, therefore offering unprecedented flexibility for the digital fabrication of complex structures. Because of these advantages, laser micro/nanofabrication has already shown important applications in many industrial fields.

The rapid developments of laser technology and material science have been bringing exciting new possibilities for the control of laser-material interactions. On the one hand, the breakthroughs in laser technology enable new characteristics, such as shorter pulse duration, higher repetition rate, or broader frequency range. On the other hand, the advances in material science allow the atomic-level engineering of material properties which offers higher controllability and more dedicated design freedom.

The aim of this SI is to highlight the recent progress in the direction of laser micro/nanofabrication and related applications. It will offer a unique opportunity for open discussion of the state-of-the-art in this direction and push forward its advances. Such discussions will also benefit intersecting possibilities between academics and industries.

Prof. Dr. Xiaowei Li
Prof. Dr. Qidai Chen
Prof. Dr. Xiangping Li
Dr. Ji Huang
Guest Editors

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Keywords

  • laser micro/nanofabrication
  • femtosecond laser
  • ultrafast and nanoscale optics
  • metamaterials
  • 3D printing
  • micro/nano optics, laser direct writing, optical data storage
  • surface micro/nano structures
  • radiation dosimetry

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Published Papers (1 paper)

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Research

13 pages, 1845 KiB  
Article
Femtosecond UV Laser Ablation Characteristics of Polymers Used as the Matrix of Astronautic Composite Material
by Mingyu Lu, Ming Zhang, Kaihu Zhang, Qinggeng Meng and Xueqiang Zhang
Materials 2022, 15(19), 6771; https://doi.org/10.3390/ma15196771 - 29 Sep 2022
Cited by 11 | Viewed by 2103
Abstract
Ultrafast laser processing has recently emerged as a new tool for processing fiber-reinforced polymer (FRP) composites. In the astronautic industry, the modified epoxy resin (named 4211) and the modified cyanate ester resin (known as BS-4) are two of the most widely used polymers [...] Read more.
Ultrafast laser processing has recently emerged as a new tool for processing fiber-reinforced polymer (FRP) composites. In the astronautic industry, the modified epoxy resin (named 4211) and the modified cyanate ester resin (known as BS-4) are two of the most widely used polymers for polymer-based composites. To study the removal mechanism and ablation process of different material components during the ultrafast laser processing of FRPs, we isolated the role of the two important polymers from their composites by studying their femtosecond UV laser (260 fs, 343 nm) ablation characteristics for controllable machining and understanding the related mechanisms. Intrinsic properties for the materials’ transmission spectrum, the absorption coefficient and the optical bandgap (Eg), were measured, derived, and compared. Key parameters for controllable laser processing, including the ablation threshold (Fth), energy penetration depth (δeff), and absorbed energy density (Eabs) at the ablation threshold, as well as their respective “incubation” effect under multiple pulse excitations, were deduced analytically. The ablation thresholds for the two resins, derived from both the diameter-regression and depth-regression techniques, were compared between resins and between techniques. An optical bandgap of 3.1 eV and 2.8 eV for the 4211 and BS-4 resins, respectively, were obtained. A detectable but insignificant-to-ablation difference in intrinsic properties and ablation characteristics between the two resins was found. A systematic discrepancy, by a factor of 30~50%, between the two techniques for deriving ablation thresholds was shown and discussed. For the 4211 resin ablated by a single UV laser pulse, a Fth of 0.42 J/cm2, a δeff of 219 nm, and an Eabs of 18.4 kJ/cm3 was suggested, and they are 0.45 J/cm2, 183 nm, and 23.2 kJ/cm3, respectively, for the BS-4 resin. The study may shed light on the materials’ UV laser processing, further the theoretical modeling of ultrafast laser ablation, and provide a reference for the femtosecond UV laser processing characteristics of FRPs for the future. Full article
(This article belongs to the Special Issue Laser Micro/Nanofabrication and Related Applications)
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