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Photonics
Special Issues
Extreme-Ultraviolet and X-ray Optics
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Extreme-Ultraviolet and X-ray Optics

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

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 6572

Special Issue Editors

Prof. Dr. Dimitris Charalambidis

E-Mail Website
Guest Editor
1. Foundation for Research and Technology-Hellas, Institute of Electronic Structure and Laser (FO.R.T.H.-I.E.S.L.), Heraklion, Crete GR 700 13, Greece
2. Greeceand Physics Department, University of Crete, Heraklion 700 13, Greece
Interests: attosecond science; AMO physics; atoms in strong electromagnetic fields; laser–surface interactions; coherent XUV and X-ray sources; coherent phenomena; ultrafast dynamics
Dr. Poletto Luca

E-Mail Website
Guest Editor
National Research Council, Institute of Photonics and Nanotechnologies, via Trasea 7, 35131 Padova, Italy
Interests: high-order laser harmonics; free-electron lasers; attosecond pulses; extreme ultraviolet optics; ultrafast beamlines
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Philippe Zeitoun

E-Mail Website
Guest Editor
Laboratoire d’Optique Appliquée(LOA), CNRS, ENSTA Paris, Ecole Polytechnique IP Paris, 91120 Palaiseau, France
Interests: EUV and X-ray sources; X-ray optics; wavefront sensing; phase-imaging; coherent imaging; plenoptic; laser-plasma physics; radiotherapy with nanoparticles

Special Issue Information

Dear Colleagues,

Laser-driven extreme ultraviolet (XUV) and X-ray sources are continuously advancing, enabling innovative experiments in groundbreaking research areas. Among the recent advancements in the development and applications of XUV and X-ray sources, we can cite gas high harmonic generation (GHHG) beamlines emitting intensities high enough to induce observable non-linear and strong field effects in XUV and soft X-ray spectral regions; Mid-IR laser-driven GHHG sources reaching wavelengths beyond the water window at high repetition rates to facilitate kinematically complete coincidence experiments; laser-driven surface high harmonic generation (SHHG) sources which aim to intense X-ray emission allowing time-resolved diffraction experiments with sub-nm/attosecond spatiotemporal resolution; and harmonic generation in crystals introducing the topic of picoscopy of electrons in solids.

The extreme operational parameters of these sources, such as the short pulse duration, the high peak and/or average intensities, and the wave-front properties put high demand on XUV and X-ray optics, including materials, coatings, focusing/steering elements, filters, sensors, detectors, delay lines, and spectrometers, to mention a few. The advancement of the sources has acted as a driver of enormous progress in the development and applications of novel XUV and X-ray optics. Some of these developments are also pertinent to other XUV and X-ray sources, i.e., free electron lasers and synchrotrons. Others are specific to laser-driven sources and research infrastructures, for example, Extreme Light Infrastructure, Laserlab Europe, and Attolab.

The aim of this Special Issue is to provide an overview of the state of the art in XUV and X-ray optics of laser-based laboratories, from the point of view of the development of technologies, methods, and instrumentation, as well as of their utilization in cutting-edge experiments and visions toward future breakthroughs.

Prof. Dr. Dimitris Charalambidis
Dr. Poletto Luca
Prof. Dr. Philippe Zeitoun
Guest Editors

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

  • high-order harmonics generation
  • extreme ultraviolet
  • x-ray, attosecond
  • ultrafast optics
  • coherent sources
  • sensors
  • detectors
  • spectrometers
  • delay
  • reflection
  • diffraction

Published Papers (3 papers)

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Research

11 pages, 3176 KiB  
Communication
High Harmonic Generation Driven by Counter-Rotating Bicircular Laser Fields from Polar Chemical Bonds in h-BN
by Haocheng Lu and Fangshu Li
Photonics 2022, 9(10), 731; https://doi.org/10.3390/photonics9100731 - 06 Oct 2022
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Abstract
High harmonic generation (HHG) driven by counter-rotating bicircular (CRB) pulses excitation has been observed from several solid targets, where circularly polarized harmonics are emitted. We study this process using time-dependent density functional theory (TDDFT) to calculate the crystal orientation dependence of the circularly [...] Read more.
High harmonic generation (HHG) driven by counter-rotating bicircular (CRB) pulses excitation has been observed from several solid targets, where circularly polarized harmonics are emitted. We study this process using time-dependent density functional theory (TDDFT) to calculate the crystal orientation dependence of the circularly polarized high harmonics from a monolayer h-BN. The resulted can be interpreted by the real space electron dynamics of electrons in polar chemical bonds. The yield of circularly polarized high harmonics (CHHs) can be optimized by controlling the direction of valence electron dynamics. Our findings pave the way for exploring the binding potential from spectrum and all-optically processing information. Full article
(This article belongs to the Special Issue Extreme-Ultraviolet and X-ray Optics)
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10 pages, 2032 KiB  
Article
Soft X-ray Lensless Imaging in Reflection Mode
by Horia Popescu, Franck Fortuna, Renaud Delaunay, Nicolas Jaouen, Carlo Spezzani and Maurizio Sacchi
Photonics 2021, 8(12), 569; https://doi.org/10.3390/photonics8120569 - 11 Dec 2021
Viewed by 2182
Abstract
We report on the development and implementation of methodologies dedicated to soft X-ray imaging by coherent scattering in reflection mode. Two complementary approaches are tested, based on Fourier transform holography and on ptychography. A new method for designing holographic masks has been developed. [...] Read more.
We report on the development and implementation of methodologies dedicated to soft X-ray imaging by coherent scattering in reflection mode. Two complementary approaches are tested, based on Fourier transform holography and on ptychography. A new method for designing holographic masks has been developed. Our results represent a feasibility test and highlight the potential and limitations of imaging in reflection mode. Reflectivity is less efficient than transmission at soft X-ray wavelengths, hampering the acquisition of good quality images. Nonetheless, it has the potential to image a wider set of samples, notably those that are not transparent to soft X-rays. Although the images obtained so far are of modest quality, these results are extremely encouraging for continuing the development of coherent soft X-ray imaging in reflection mode. Full article
(This article belongs to the Special Issue Extreme-Ultraviolet and X-ray Optics)
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11 pages, 1846 KiB  
Article
Generation of Energetic Highly Elliptical Extreme Ultraviolet Radiation
by Emmanouil Vassakis, Ioannis Orfanos, Ioannis Liontos and Emmanouil Skantzakis
Photonics 2021, 8(9), 378; https://doi.org/10.3390/photonics8090378 - 09 Sep 2021
Cited by 3 | Viewed by 2183
Abstract
In this study, the generation of energetic coherent extreme ultraviolet (XUV) radiation with the potential for controlled polarization is reported. The XUV radiation results from the process of high harmonic generation (HHG) in a gas phase atomic medium, driven by an intense two-color [...] Read more.
In this study, the generation of energetic coherent extreme ultraviolet (XUV) radiation with the potential for controlled polarization is reported. The XUV radiation results from the process of high harmonic generation (HHG) in a gas phase atomic medium, driven by an intense two-color circularly polarized counter-rotating laser field, under loose focusing geometry conditions. The energy of the XUV radiation emitted per laser pulse is found to be of the order of ~100 nJ with the spectrum spanning from 17 to 26 eV. The demonstrated energy values (along with tight XUV focusing geometries) are sufficient to induce nonlinear processes. Our results challenge current perspectives regarding ultrafast investigations of chiral phenomena in the XUV spectral region. Full article
(This article belongs to the Special Issue Extreme-Ultraviolet and X-ray Optics)
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