Advances in THz Technology

Dear Colleagues,

THz radiation has become an exciting new frontier of the electro-magnetic spectrum due to its usefulness in many aspects of experimental science. THz refers the portion of the electromagnetic radiation band from 30 μm to 1 mm (10 THz–100 GHz). THz electromagnetic waves (T-rays) lie between microwave and infrared light.

THz radiation has a diversity of uses due to its unique properties, e.g., it possesses both penetrative capacity and low photon energy and it can be generated with high time and spatial coherence combined with a unique sensitivity to water. It can penetrate common materials, such as paper, cloth, and wood, with reduced susceptibility to Rayleigh scattering compared with infrared light. These properties render THz light ideal for imaging and identify that part of the electromagnetic spectrum as having a potentially high advantage for in vivo bio-medical detection and treatment. Furthermore, its wavelength is such that it can couple to molecular wide vibrational modes, rendering unique molecular signatures in its spectra.  This specificity is unparalleled in other spectroscopic techniques.

THz sources above 1 THz are generally complicated and expensive, making high-power sources rather scarce. The scarcity of high-power sources in the THz frequency range renders methods designed to emit efficiently radiation particularly important in this regime. Current methods of THz generation such as laser-based emission, dielectric lined waveguides (DLWS), Cherenkov FEL, nonlinear metasurfaces, etc. are especially limited when high power is required. High-yield laser-based methods can emit hundreds of uJ but cannot be tuned to other frequencies.

Tabletop systems based on excitation of nonlinear crystals or photoconductive antennas by femtosecond lasers have revolutionized the field of spectroscopy by making these techniques accessible to most research laboratories. However, the low powers involved in such systems restrict more intriguing non-linear applications.

For the above reasons, a great effort is invested in THZ technology in order to develop novel methods for THz emission, low or high power, and with or without tunability properties. We here call for papers in this Special Issue to discuss new tech methods and schemes intending to lead to new sources and emission methods, which will advance the scientific and industrial communities and provide new research possibilities. We are interested in new applications, science, and techniques.

Authors are kindly invited to submit original research on both theoretical and experimental methods.

Dr. Ariel Nause
Dr. Paul Ben Ishai
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. Electronics 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.

• THz emission
• THz spectroscopy
• THz accelerators