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Photonics
Special Issues
Femtosecond Laser and Its Applications
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Femtosecond Laser and Its Applications

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (15 July 2023) | Viewed by 1080

Special Issue Editor

Dr. Jingya Sun

E-Mail Website
Guest Editor
School of Mechanical Engineering, Beijing Institute of Technology, Beijing, China
Interests: femtosecond laser; ultrafast dynamics; carrier dynamics; ultrafast four-dimensional scaning electron microscopy; electron dynamics control

Special Issue Information

Dear Colleagues,

This Special Issue invites manuscripts that document the recent advances in “Femtosecond Laser and Its Applications”.

Femtosecond lasers have an ultrashort irradiation period of about 10-12-10-15s. The intensities of femtosecond lasers can easily exceed 1012Wcm−2. Because of their ultrashort irradiation periods and ultrahigh intensities, femtosecond laser pulses in some aspects fundamentally change the laser–material interaction mechanisms compared with long laser pulses, which has created wide-ranging and exciting new applications. This Special Issue aims to highlight recent advances in femtosecond lasers and their applications in femtosecond laser devices, femtosecond laser fabrication, and femtosecond laser–material interactions.

We will consider theoretical, numerical, and experimental papers that cover, but are not limited to, the following topics:

  • Advances in femtosecond laser sources, detectors, and components;
  • Fundamental study of femtosecond laser–material interactions;
  • Ultrafast carrier dynamics, nonlinear ionization mechanisms, and nonequilibrium processes in advanced materials;
Progress in femtosecond lasers for novel applications, such as the following:
  • Non-destructive detection techniques;
  • Micro/nanoscale fabrication;
  • Four-dimensional imaging and spectroscopy;
  • Hologram imaging;
  • Cell recognition.

Dr. Jingya Sun
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. Photonics is an international peer-reviewed open access monthly 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

  • femtosecond laser
  • ultrafast dynamics
  • carrier dynamics
  • ultrafast four-dimensional scaning electron microscopy
  • electron dynamics control

Published Papers (1 paper)

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Research

13 pages, 4506 KiB  
Article
From Localized Laser Energy Absorption to Absorption Delocalization at Volumetric Glass Modification with Gaussian and Doughnut-Shaped Pulses
by Martin Zukerstein, Vladimir P. Zhukov, Yuri P. Meshcheryakov and Nadezhda M. Bulgakova
Photonics 2023, 10(8), 882; https://doi.org/10.3390/photonics10080882 - 29 Jul 2023
Cited by 2 | Viewed by 726
Abstract
Volumetric modification of transparent materials by femtosecond laser pulses is successfully used in a wide range of practical applications. The level of modification is determined by the locally absorbed energy density, which depends on numerous factors. In this work, it is shown experimentally [...] Read more.
Volumetric modification of transparent materials by femtosecond laser pulses is successfully used in a wide range of practical applications. The level of modification is determined by the locally absorbed energy density, which depends on numerous factors. In this work, it is shown experimentally and theoretically that, in a certain range of laser pulse energies, the peak of absorption of laser radiation for doughnut-shaped (DS) pulses is several times higher than for Gaussian ones. This fact makes the DS pulses very attractive for material modification and direct laser writing applications. Details of the interactions of laser pulses of Gaussian and doughnut shapes with fused silica obtained by numerical simulations are presented for different pulse energies and compared with the experimentally obtained data. The effect of absorbed energy delocalization with increasing laser pulse energy is demonstrated for both beam shapes, while at relatively low pulse energies, the DS beam geometry provides stronger local absorption compared to the Gaussian geometry. The implications of a DS pulse action for post-irradiation material evolution are discussed based on thermoelastoplastic modeling. Full article
(This article belongs to the Special Issue Femtosecond Laser and Its Applications)
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