Special Issue "THz: Research Frontiers for New Sources, Imaging and Other Advanced Technologies"

A special issue of Condensed Matter (ISSN 2410-3896).

Deadline for manuscript submissions: closed (30 November 2019).

Special Issue Editors

Prof. Stefano Lupi
E-Mail Website
Guest Editor
TeraLab Laboratory and SISSI and [email protected], Department of Physics, Sapienza University of Rome, Italy
Interests: THz radiation; Pump-Probe spectroscopy; plasmonics; metal-insulator transition; optical spectroscopy; nanoMicroscopy
Prof. Akinori Irizawa
E-Mail Website
Guest Editor
ISIR, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Interests: solid state physics; nonlinear phenomena; synchrotron radiation; free electron laser; IR and THz radiation; optical spectroscopy; photoemission spectroscopy
Prof. Augusto Marcelli
E-Mail Website
Guest Editor
INFN – LNF, Via Enrico Fermi 40, 00044 Frascati, Italy
Tel. +3906 94032737
Interests: synchrotron radiation research; synchrotron radiation instrumentation: IR and x-ray optics; x-ray absorption spectroscopy; circular magnetic x-ray dichroism; time resolved concurrent experiments; high Tc superconductors and quantum materials; multiple scattering theory applied to core level x-ray absorption spectra; dust and aerosol characterization and ultra-trace detection; FTIR spectromicroscopy and imaging applied to protein, cells and tissues
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Special Issue Information

Dear Colleagues,

The region of the electromagnetic spectrum from 0.1 to 20 terahertz (THz, 3–600 cm−1, 3 mm–15 μm wavelength) is a frontier area for research in Physics, Chemistry, Biology, Materials science, Biosafety and Medicine. THz sources showing high stability, high-intensity and covering a broad spectral range have been scarce, but this gap has been filled by a wide range of new technologies ranging from Quantum-Cascade-Lasers (QCL), to THz emission from high-intensity sub-ps lasers, from THz production from new synchrotrons and Free-Electron-Lasers. Terahertz radiation is now available in both cw and pulsed form, down to single-cycles or less, with time duration down to hundreds of fs, and a peak powers up to 1 GW. New sources have led to new applications in many scientific areas, as researchers are aware of the opportunities for research progress in their fields using THz radiation. In this book, different scientific applications in THz science will be discussed, ranging from new sources non linear optics, pump-probe spectroscopy, imaging in biomedicine, THz spectroscopy of gases and liquid, THz detectors and much more.

Prof. Stefano Lupi
Prof. Akinori Irizawa
Prof. Augusto Marcelli
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 papers will be 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. Condensed Matter is an international peer-reviewed open access quarterly 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 1000 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

  • THz
  • spectroscopy
  • Pump-Probe spectroscopy
  • plasmonics
  • optical spectroscopy
  • microscopy
  • imaging
  • non-linear phenomena
  • synchrotron radiation
  • free electron laser

Published Papers (1 paper)

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Research

Open AccessArticle
Novel Schemes for Compact FELs in the THz Region
Condens. Matter 2019, 4(4), 90; https://doi.org/10.3390/condmat4040090 - 19 Nov 2019
Abstract
The rapid advance of terahertz technologies in terms of radiation generators, systems, and scientific or industrial applications has put a particular focus on compact sources with challenging performances in terms of generated power (peak and/or average), radiation time structure, and frequency band tunability. [...] Read more.
The rapid advance of terahertz technologies in terms of radiation generators, systems, and scientific or industrial applications has put a particular focus on compact sources with challenging performances in terms of generated power (peak and/or average), radiation time structure, and frequency band tunability. Free electron laser (FEL)-based sources are probably the best candidates to express such a versatility; there are a number of schemes that have been investigated over the years to generate coherent radiation from free electrons in the mm-wave and terahertz regions of the spectrum, covering a wide frequency range from approximately 100 GHz to 10 THz. This paper proposes novel schemes for exploring the limits in the performance of radio frequency-driven free-electron devices in terms of ultrashort pulse duration, wide bandwidth operation, and energy recovery for near continuous wave (CW) operation. The aim of the present work is to demonstrate the feasibility of an FEL achieving performance comparable to a conventional photoconductive THz source, which is commonly used for time-domain spectroscopy (TDS), in terms of bandwidth and pulse duration. We will also demonstrate that a THz FEL could be very powerful and flexible in terms of tailoring its spectral features. Full article
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