Next Article in Journal
Multi-Band Superconductivity and the Steep Band/Flat Band Scenario
Previous Article in Journal
A Quantum Model for the Dynamics of Cold Dark Matter
Open AccessArticle

Novel Schemes for Compact FELs in the THz Region

ENEA, Fusion Physics Division, C.R. Frascati, via E. Fermi 45, I-00044 Frascati (Roma), Italy
*
Author to whom correspondence should be addressed.
Condens. Matter 2019, 4(4), 90; https://doi.org/10.3390/condmat4040090
Received: 23 October 2019 / Revised: 8 November 2019 / Accepted: 15 November 2019 / Published: 19 November 2019
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. View Full-Text
Keywords: terahertz; free electron laser; energy recovery terahertz; free electron laser; energy recovery
Show Figures

Figure 1

MDPI and ACS Style

Doria, A.; Gallerano, G.P.; Giovenale, E. Novel Schemes for Compact FELs in the THz Region. Condens. Matter 2019, 4, 90.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop