Results 31 to 40 of about 54,131 (291)
APL Materials, 2023 For nonlinear optical materials to be applicable as efficient broadband terahertz (THz) wave generators, low absorption with wide transparency in the THz frequency range is highly important. In this study, we report efficient organic THz wave generators,
Bong-Rim Shin +5 more
doaj +1 more source
Time-Delay Multiplexing of Two Beams in a Terahertz Imaging Radar [PDF]
, 2010 We demonstrate a time-delay multiplexing technique that doubles the frame rate of a 660–690-GHz imaging radar with minimal additional instrument complexity.
Bryllert, Tomas +5 more
core +1 more source
Sub-terahertz and terahertz generation in long-wavelength quantum cascade lasers
Nanophotonics, 2019 Terahertz quantum cascade laser sources with intra-cavity non-linear frequency mixing are the first room-temperature electrically pumped monolithic semiconductor sources that operate in the 1.2–5.9 THz spectral range.
Fujita Kazuue +4 more
doaj +1 more source
MATCHING STRUCTURES WITH FORM BIREFRINGENCE WITH FREE SPACE IN THZ RANGE [PDF]
Радиофизика и электроника, 2015 When constructing polarization radio measuring paths operating in the THz frequency range (0.1…10 THz) the differential phase sections (DPS) are widely used. The use of terahertz waves (THz) allows research in radio astronomy, radio spectroscopy, biology,
V. I. Bezborodov +3 more
doaj +1 more source
Directivity Control of Terahertz Radiation from Single-Color Filament Plasma with Polypropylene Pipe
Photonics, 2023 Two-dimensional angular distribution of terahertz emission from single-color filamentation of laser pulses is experimentally studied. The use of a polypropylene pipe makes it possible to transform the angular pattern of terahertz radiation from the ...
Daria Mokrousova +6 more
doaj +1 more source
TRANSMISSION OF TERAHERTZ RADIATION THROUGH ONE-DIMENSIONAL WIRE GRATINGS AT DIFFERENT ANGLES OF INCIDENCE [PDF]
Radio Physics and Radio Astronomy, 2020 Purpose: One-dimensional wire diffraction gratings, usually being mounted on ring frames, are often used in quasi-optical instruments under the construction of functional devices of different usage.
M. I. Dzyubenko +6 more
doaj +1 more source
Thermal Radiation from Carbon Nanotubes in the Terahertz Range [PDF]
Physical Review Letters, 2007 The thermal radiation from an isolated finite-length carbon nanotube (CNT) is theoretically investigated both in near- and far-field zones. The formation of the discrete spectrum in metallic CNTs in the terahertz range is demonstrated due to the reflection of strongly slowed-down surface-plasmon modes from CNT ends.
Nemilentsau, A. M. +2 more
openaire +3 more sources
PROSPECTS OF THE USE OF GRADIENT GRATES IN THE LASERS OF TERAHERTZ RANGE [PDF]
Radio Physics and Radio Astronomy, 2018 Purpose: The improvement and development of terahertz radiation sources is required for the further development of the terahertz frequency range. Submillimeter lasers are one of the few sources of terahertz radiation.
M. I. Dzyubenko +3 more
doaj +1 more source
Electron transport and terahertz gain in quantum-dot cascades [PDF]
, 2008 Electron transport through quantum-dot (QD) cascades was investigated using the formalism of nonequilibrium Green's functions within the self-consistent Born approximation.
Harrison, P. +3 more
core +1 more source
Spectroscopic Analysis of Melatonin in the Terahertz Frequency Range [PDF]
Sensors, 2018 There is a need for fast and reliable quality and authenticity control tools of pharmaceutical ingredients. Among others, hormone containing drugs and foods are subject to scrutiny. In this study, terahertz (THz) spectroscopy and THz imaging are applied for the first time to analyze melatonin and its pharmaceutical product Circadin.
Uroš Puc +6 more
openaire +3 more sources