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Applied Sciences
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Femtosecond Laser-Matter Interaction: Theory, Experiments and Applications
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Femtosecond Laser-Matter Interaction: Theory, Experiments and Applications

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

Deadline for manuscript submissions: closed (25 December 2021) | Viewed by 6229

Special Issue Editor

Prof. Dr. István B Földes

E-Mail Website
Guest Editor
Wigner Research Centre for Physics, H-1121 Budapest, Konkoly-Thege ut 29-33, Hungary
Interests: plasma physics; laser interaction with matter

Special Issue Information

Dear Colleagues,

Since the early works of Zewail, which included direct studies of molecular processes, femtosecond lasers have gained a large number of applications, including the use of high harmonics which has allowed the investigation of fast processes in molecules and solids applications to broaden toward atto- and zeptosecond time scales.

The increasing intensity of femtosecond lasers allows the generation of high-temperature plasmas as well as the acceleration of electrons and ions toward relativistic velocities. Plasmas are possible sources of hot dense matter and that of ultrashort x-ray pulses.

The Special Issue aims to be open to all applications of femtosecond laser–matter interactions.

Prof. Dr. István B Földes
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.

Published Papers (3 papers)

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Research

11 pages, 2862 KiB  
Article
Time-Resolved Imaging of Femtosecond Laser-Induced Plasma Expansion in a Nitrogen Microjet
by Anna Gabriella Ciriolo, Rebeca Martínez Vázquez, Gabriele Crippa, Michele Devetta, Aldo Frezzotti, Daniela Comelli, Gianluca Valentini, Roberto Osellame, Caterina Vozzi and Salvatore Stagira
Appl. Sci. 2022, 12(4), 1978; https://doi.org/10.3390/app12041978 - 14 Feb 2022
Viewed by 1620
Abstract
We report on the study of ultrafast laser-induced plasma expansion dynamics in a gas microjet. To this purpose, we focused femtosecond laser pulses on a nitrogen jet produced through a homemade De Laval micronozzle. The laser excitation led to plasma generation with a [...] Read more.
We report on the study of ultrafast laser-induced plasma expansion dynamics in a gas microjet. To this purpose, we focused femtosecond laser pulses on a nitrogen jet produced through a homemade De Laval micronozzle. The laser excitation led to plasma generation with a characteristic spectral line emission at 391 nm. By following the emitted signal with a detection system based on an intensified charge-coupled device (ICCD) we captured the two-dimensional spatial evolution of the photo-excited nitrogen ions with a temporal resolution on the nanosecond time scale. We fabricated the micronozzle on a fused silica substrate by femtosecond laser micromachining. This technique enabled high accuracy and three-dimensional capabilities, thus, providing an ideal platform for developing glass-based microfluidic structures for application to plasma physics and ultrafast spectroscopy. Full article
(This article belongs to the Special Issue Femtosecond Laser-Matter Interaction: Theory, Experiments and Applications)
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11 pages, 10871 KiB  
Article
Laser-Assisted Etching of EagleXG Glass by Irradiation at Low Pulse-Repetition Rate
by Roberto Memeo, Mattia Bertaso, Roberto Osellame, Francesca Bragheri and Andrea Crespi
Appl. Sci. 2022, 12(3), 948; https://doi.org/10.3390/app12030948 - 18 Jan 2022
Cited by 2 | Viewed by 2433
Abstract
Femtosecond laser micromachining is becoming an established technique for the fabrication of complex three-dimensional structures in glass. The combination of laser writing and chemical etching increases the technique versatility by allowing the fabrication of hollow structures within the bulk material. The possibility to [...] Read more.
Femtosecond laser micromachining is becoming an established technique for the fabrication of complex three-dimensional structures in glass. The combination of laser writing and chemical etching increases the technique versatility by allowing the fabrication of hollow structures within the bulk material. The possibility to encompass both optical and fluidic components in a single substrate allows us to realize optofluidic devices usable in several application fields. Here, we present new investigations of laser-assisted etching in Eagle XG glass showing good etching conditions at low repetition rates, where thermal effects can be neglected, and low irradiation speeds, which allow for complex microchannel network formation. Full article
(This article belongs to the Special Issue Femtosecond Laser-Matter Interaction: Theory, Experiments and Applications)
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10 pages, 3493 KiB  
Article
Generation of Cold Magnetized Relativistic Plasmas at the Rear of Thin Foils Irradiated by Ultra-High-Intensity Laser Pulses
by Artem V. Korzhimanov
Appl. Sci. 2021, 11(24), 11966; https://doi.org/10.3390/app112411966 - 16 Dec 2021
Cited by 1 | Viewed by 1502
Abstract
A scheme to generate magnetized relativistic plasmas in a laboratory setting is proposed. It is based on the interaction of ultra-high-intensity sub-picosecond laser pulses with few-micron-thick foils or films. By means of Particle-In-Cell simulations, it is shown that energetic electrons produced by the [...] Read more.
A scheme to generate magnetized relativistic plasmas in a laboratory setting is proposed. It is based on the interaction of ultra-high-intensity sub-picosecond laser pulses with few-micron-thick foils or films. By means of Particle-In-Cell simulations, it is shown that energetic electrons produced by the laser and evacuated at the rear of the target trigger an expansion of the target, building up a strong azimuthal magnetic field. It is shown that in the expanding plasma sheath, a ratio of the magnetic pressure and the electron rest-mass energy density exceeds unity, whereas the plasma pressure is lower than the magnetic pressure and the electron gyroradius is lower than the plasma dimension. This scheme can be utilized to study astrophysical extreme phenomena such as relativistic magnetic reconnection in laboratory. Full article
(This article belongs to the Special Issue Femtosecond Laser-Matter Interaction: Theory, Experiments and Applications)
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