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Femtosecond Light Sources and Their Applications in the Deep UV,...
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Femtosecond Light Sources and Their Applications in the Deep UV, Vacuum UV, and Extreme UV

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

Deadline for manuscript submissions: closed (31 July 2018) | Viewed by 14712

Special Issue Editor

Dr. Yuichiro Kida

E-Mail Website
Guest Editor
Japan Synchrotron Radiation Research Institute, Hyogo 679-5148, Japan
Interests: ultrafast optics; ultrafast light-matter interaction; ultrafast spectroscopy; nonlinear optics; free-electron lasers

Special Issue Information

Dear Colleagues,

Thus far, various femtosecond light sources have been investigated in deep UV (DUV), vacuum UV (VUV), and extreme UV (EUV). Nonlinear crystals, such as KBBF, are used to efficiently up-convert femtosecond laser pulses into DUV and VUV. Metamaterials are also investigated as nonlinear media for frequency conversion. Laser crystals like Ce:LiCAF allow direct lasing and light amplification in DUV. Third harmonic generation, four-wave mixing, filamentation, and supercontinuum generation produce sub-20 fs laser pulses in DUV and VUV. Such ultrashort sources are now utilized in time-resolved and multi-dimensional spectroscopies. In the EUV spectral range, femtosecond pulses are available from free-electron lasers (FEL) with sub-millijoule pulse energies. Nonlinear optical processes, as well as ultrafast phenomena, are extensively studied there.

This Special Issue, "Femtosecond Light Sources and Their Applications in the Deep UV, Vacuum UV, and Extreme" calls for research articles on resent advances in the field of femtosecond light sources in DUV, VUV, and EUV and their applications. The topics include, but are not limited to, recent development on: frequency conversion, light amplification, pulse compression in nonlinear media, lasing and amplification in laser crystals, pulse shaping, seeded and SASE FELs for femtosecond pulses, with unprecedented parameters. The topics also cover ultrafast and nonlinear spectroscopies with advanced femtosecond coherent sources and new findings from them. Attosecond pulse generation and its applications are not covered in this issue, but are covered in another Special Issue "Extreme Time Scale Photonics"

Dr. Yuichiro Kida
Guest Editor

Manuscript Submission Information

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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.

Keywords

  • Deep UV, Vacuum UV, and Extreme UV
  • Ultrashort laser pulses
  • Lasing, amplification, and frequency conversion
  • Filamentation, supercontinuum, high-order harmonic generation, and four-wave mixing
  • Pulse shaping and compression
  • Free-electron laser
  • Ultrafast phenomena
  • Time-resolved spectroscopy
  • Multi-dimensional spectroscopy

Published Papers (3 papers)

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Research

7 pages, 2272 KiB  
Article
UV-Driven Harmonic Generation for Time-Resolved Photoelectron Spectroscopy of Polyatomic Molecules
by Shunsuke Adachi and Toshinori Suzuki
Appl. Sci. 2018, 8(10), 1784; https://doi.org/10.3390/app8101784 - 01 Oct 2018
Cited by 8 | Viewed by 3055
Abstract
A single-order harmonic pulse in the vacuum-ultraviolet (VUV) is highly desirable for time-resolved photoelectron spectroscopy (TRPES) of polyatomic molecules. A high-power 9th harmonic of a Ti:sapphire laser (hv = 14 eV) is obtained using a UV driving laser at 270 nm (the [...] Read more.
A single-order harmonic pulse in the vacuum-ultraviolet (VUV) is highly desirable for time-resolved photoelectron spectroscopy (TRPES) of polyatomic molecules. A high-power 9th harmonic of a Ti:sapphire laser (hv = 14 eV) is obtained using a UV driving laser at 270 nm (the 3rd harmonic). We describe our recent efforts to develop VUV TRPES combined with UV-driven harmonic generation, and present a few representative results from our recent TRPES studies. Full article
(This article belongs to the Special Issue Femtosecond Light Sources and Their Applications in the Deep UV, Vacuum UV, and Extreme UV)
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18 pages, 5642 KiB  
Article
Ultraviolet Transient Absorption Spectrometer with Sub-20-fs Time Resolution
by Rocío Borrego-Varillas, Lucia Ganzer, Giulio Cerullo and Cristian Manzoni
Appl. Sci. 2018, 8(6), 989; https://doi.org/10.3390/app8060989 - 16 Jun 2018
Cited by 46 | Viewed by 8532
Abstract
We describe a transient absorption (TA) spectroscopy system in the ultraviolet (UV) spectral range, for the study of the ultrafast optical response of biomolecules. After reviewing the techniques for the generation and characterization of ultrashort UV pulses, we describe the experimental setup of [...] Read more.
We describe a transient absorption (TA) spectroscopy system in the ultraviolet (UV) spectral range, for the study of the ultrafast optical response of biomolecules. After reviewing the techniques for the generation and characterization of ultrashort UV pulses, we describe the experimental setup of our ultrabroadband UV TA spectrometer. The setup combines sub-20-fs UV pump pulses tunable between 3.35 and 4.7 eV, with broadband white-light-continuum probe pulses in the 1.7–4.6 eV range. Thanks to the broad tunability of the pump pulses in the UV spectral range, the extremely high temporal resolution and the broad spectral coverage of the probe, this TA system is a powerful and versatile tool for the study of many biomolecules. As an example of its potential, we apply the TA spectrometer to track ultrafast internal conversion processes in pyrene after excitation in the UV, and to resolve an impulsively excited molecular vibration with 85-fs period. Full article
(This article belongs to the Special Issue Femtosecond Light Sources and Their Applications in the Deep UV, Vacuum UV, and Extreme UV)
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10 pages, 4001 KiB  
Article
Generation of Ultrashort Optical Pulses in the Deep-Ultraviolet Region Based on Four-Wave Raman Mixing
by Yoshifumi Mori and Totaro Imasaka
Appl. Sci. 2018, 8(5), 784; https://doi.org/10.3390/app8050784 - 15 May 2018
Cited by 2 | Viewed by 2627
Abstract
A two-color pump beam (800 and 1200 nm) was introduced into hydrogen for molecular phase modulation, and a probe beam (267 nm) to generate Raman sidebands, by coherent frequency modulation based on four-wave Raman mixing. The phase and temporal profile were evaluated by [...] Read more.
A two-color pump beam (800 and 1200 nm) was introduced into hydrogen for molecular phase modulation, and a probe beam (267 nm) to generate Raman sidebands, by coherent frequency modulation based on four-wave Raman mixing. The phase and temporal profile were evaluated by means of a self-diffraction frequency resolved optical gating (SD FROG) system. The relative phases among the Raman sidebands were controlled by changing the angle of a thin CaF2-plate inserted into the 267-nm beam path, suggesting that a train of 2.6-fs pulses was generated in the deep-ultraviolet region. Full article
(This article belongs to the Special Issue Femtosecond Light Sources and Their Applications in the Deep UV, Vacuum UV, and Extreme UV)
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