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
TERAHERTZ OSCILLATIONS IN InN GUNN DIODES WITH AN ACTIVE REGION LENGTH OF 1 μm AND WITH A GRADED GaInN LAYER [PDF]
Radio Physics and Radio Astronomy, 2022 Subject and Purpose. The InN Gunn diode is known as the device capable of generating powerful oscillations atfrequencies above 300 GHz. A possible way for increasing both the microwave power and the cutoff frequency of the Gunn diode is to employ graded ...
I. P. Storozhenko, S. I. Sanin
doaj +1 more source
Employment of gradient metal-film output mirrors in terahertz discharge lasers [PDF]
Радиофизика и электроника, 2021 Subject and Purpose. The problem of output beam matching with the waveguide transmission line often arises when using terahertz lasers. The special quasi-optical devices that are used to combat the problem lead to radiation losses and additional material
M.I. Dzyubenko +7 more
doaj +1 more source
Extremely large extinction efficiency and field enhancement in terahertz resonant dipole nanoantennas [PDF]
, 2011 The distinctive ability of nanometallic structures to manipulate light at the nanoscale has recently promoted their use for a spectacular set of applications in a wide range of areas of research including artificial optical materials, nano-imaging ...
Al-Naib, Ibraheem A. I. +14 more
core +1 more source
, 2017 The sensitivity of direct terahertz detectors based on self-mixing of terahertz electromagnetic wave in field-effect transistors is being improved with noise-equivalent power close to that of Schottky-barrier-diode detectors.
Li, Xiang(李想) +9 more
core +1 more source
Polarization-maintaining reflection-mode THz time-domain spectroscopy of a polyimide based ultra-thin narrow-band metamaterial absorber [PDF]
, 2018 This paper reports the design, the microfabrication and the experimental characterization of an ultra-thin narrow-band metamaterial absorber at terahertz frequencies.
Astorino, Maria Denise +8 more
core +2 more sources
TERAHERTZ CLYNOOROTRON WITH AN AZIMUTHAL COMB [PDF]
Радиофизика и электроника, 2017 The results of theoretical and experimental studies of oro-trons – oscillators of diffraction radiation with spatially developed electrodynamic systems, electromagnetic oscillations in which are excited, as a rule, by nonrelativistic spatially developed ...
V. D. Yeryomka +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
Robust Topological Terahertz Circuits using Semiconductors
, 2016 Topological Insulator-based devices can transport electrons/photons at the surfaces of materials without any back reflections, even in the presence of obstacles.
Bahari, Babak +2 more
core +1 more source
Terahertz time-domain spectroscopy of edible oils. [PDF]
, 2017 Chemical degradation of edible oils has been studied using conventional spectroscopic methods spanning the spectrum from ultraviolet to mid-IR. However, the possibility of morphological changes of oil molecules that can be detected at terahertz ...
Abbott, Derek +2 more
core +2 more sources