Advances in Ultrafast Optics: From Fundamental Science to Applications

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

Deadline for manuscript submissions: closed (15 November 2024) | Viewed by 3238

Special Issue Editors


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Guest Editor
Institute of Photonics and Nanotechnologies, National Research Council of Italy, via Trasea 7, I-35131 Padova, Italy
Interests: ultrafast optics; diffraction gratings; monochromators

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Guest Editor
National Research Council, Institute of Photonics and Nanotechnologies, Padova, Italy
Interests: XUV ultrafast spectroscopy; XUV ultrafast optics; generation of femto- and attosecond pulses; ultrafast pulse conditioning
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Special Issue Information

Dear Colleagues,

Since the first attempts to generate and control laser pulses in the femto/atto seconds time scale, ultrafast optics has developed and become a mature and autonomous branch of optics. In this research field, several sub-branches have developed, becoming extremely interconnected between one another. 

Light–matter interaction can be exploited to probe the behaviour of exotic materials and to control chemical reaction channels. The control and measurement of polarization of ultrashort pulses has introduced a new freedom degree in the design of experiments. Moreover, interconnections with quantum computing and quantum communications are intriguing, as are the production and the applications of squeezed light states. 

This Special Issue, entitled “Advances in Ultrafast Optics: From Fundamental Science to Applications”, aims to collect the most recent advances in this very interconnected research field, in the form of both regular and review papers.    

Topics of interest for this Special Issue include, but are not limited to, the following areas: 

  • Pulse generation and conditioning; 
  • Light-matter interactions: simulations and measurements;
  • Ultrafast spectroscopy and polarimetry; 
  • Applications to new/unusual research fields;
  • Industrial applications;
  • Micromachining.

Dr. Luca Poletto
Dr. Fabio Frassetto
Guest Editors

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Published Papers (2 papers)

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17 pages, 13676 KiB  
Article
A Near Fourier-Limited Pulse-Preserving Monochromator for Extreme-Ultraviolet Pulses in the Few-Fs Regime
by Yudong Yang, Tanja Neumann, Julia Hengster, Roland E. Mainz, Jakob Elsner, Oliver D. Mücke, Franz X. Kärtner and Thorsten Uphues
Photonics 2024, 11(6), 525; https://doi.org/10.3390/photonics11060525 - 1 Jun 2024
Viewed by 893
Abstract
We present a pulse-preserving multilayer-based extreme-ultraviolet (XUV) monochromator providing ultra-narrow bandwidth (ΔE<0.6eV, Ec=92eV) and compact footprint (28×10cm2) for easy integration into high-harmonic generation (HHG) or free-electron [...] Read more.
We present a pulse-preserving multilayer-based extreme-ultraviolet (XUV) monochromator providing ultra-narrow bandwidth (ΔE<0.6eV, Ec=92eV) and compact footprint (28×10cm2) for easy integration into high-harmonic generation (HHG) or free-electron laser (FEL) sources. The temporal resolution of the novel design supports pulse durations of typical pump–probe setups in the femtosecond and attosecond regime, depending on the mirror design and focusing geometries over the tuning range of the monochromator. The theoretical design is analyzed and experimentally characterized in a laser-driven HHG setup. Full article
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17 pages, 4926 KiB  
Article
Synergy of Nd:YAG Picosecond Pulsed Laser Irradiation and Electrochemical Anodization in the Formation of TiO2 Nanostructures for the Photocatalytic Degradation of Pesticide Carbofuran
by Miloš Tošić, Vladimir Rajić, Dejan Pjević, Stevan Stojadinović, Nikša Krstulović, Suzana Dimitrijević-Branković and Miloš Momčilović
Photonics 2024, 11(3), 284; https://doi.org/10.3390/photonics11030284 - 21 Mar 2024
Cited by 1 | Viewed by 1349
Abstract
This study proposes a simple and controlled method for producing TiO2 with phase junction, oxygen vacancies, and Ti3+ by combining picosecond pulsed laser irradiation and electrochemical anodization. Ti mesh was pretreated by irradiating with a picosecond pulsed laser technique using an [...] Read more.
This study proposes a simple and controlled method for producing TiO2 with phase junction, oxygen vacancies, and Ti3+ by combining picosecond pulsed laser irradiation and electrochemical anodization. Ti mesh was pretreated by irradiating with a picosecond pulsed laser technique using an Nd:YAG laser (1064 nm) at two fluencies, 15 J/cm2 and 30 J/cm2. The samples were then subjected to electrochemical anodization to form TiO2 nanotube arrays on the previously laser-treated surface. This study will investigate the possibility of forming TiO2 nanotube arrays on a pre-laser-treated Ti substrate and determine their physicochemical and photocatalytic properties. The samples were characterized by FESEM, XRD, Raman, XPS, and UV-Vis DRS. UV-Vis spectroscopy was used to observe the progress of photocatalytic degradation for all samples, and degradation products were determined using GC-MS. With the synergistic effects of phase junction, oxygen vacancies, and Ti3+, the laser-treated TiO2 with 30 J/cm2 showed a higher photocatalytic degradation rate (85.1%) of the pesticide carbofuran compared to non-laser-treated TiO2 (54.8%), remaining stable during successive degradation cycles, which has promising practical applications. Full article
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