Results 31 to 40 of about 9,978 (259)

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

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, Hayashi Shohei, Ito Akio, Hitaka Masahiro, Dougakiuchi Tatsuo   +4 more
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, S.O. Masalov, Y.E. Kamenev, I.V. Kolenov, V.P. Radionov, N.F. Dakhov, А.I. Puzak, O.I. Dmitruk   +7 more
doaj   +1 more source

Photon-Assisted Shot Noise in Graphene in the Terahertz Range [PDF]

Physical Review Letters, 2016
When subjected to electromagnetic radiation, the fluctuation of the electronic current across a quantum conductor increases. This additional noise, called photon-assisted shot noise, arises from the generation and subsequent partition of electron-hole pairs in the conductor.
Parmentier, François, Serkovic-Loli, L.N., Roulleau, P., Glattli, D.C.   +3 more
openaire   +4 more sources

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., Slepyan, G. Ya., Maksimenko, S. A.   +2 more
openaire   +3 more sources

Measurement of electrodynamic characteristics of flat metal gratings in the teraherz range [PDF]

Радиофизика и электроника, 2019
Subject and purpose. The terahertz frequency range now attracts much attention of researchers and consumers in connection with the wide possibilities of using it for solving a number of problems in science, technology and medicine.
M.I. Dzyubenko, Y.E. Kamenev, S.A. Masalov, V.P. Radionov   +3 more
doaj   +1 more source

RESONATOR METHOD FOR DETERMINATION OF LOSSES IN ONE-DIMENSIONAL METAL GRATINGS IN TERAHERTZ RANGE [PDF]

Радиофизика и электроника, 2018
Subject and purpose. The terahertz frequency range currently attracts much attention due to the wide possibilities of its application for solving a number of problems in science, technology, and medicine.
M. I. Dzyubenko, Y. E. Kamenev, V. P. Radionov, Z. Y. Litvina   +3 more
doaj   +1 more source

TUNABLE AND BROADBAND DIFFERENTIAL PHASE SECTIONS IN TERAHERTZ FREQUENCY RANGE [PDF]

Radio Physics and Radio Astronomy, 2016
Purpose: Studying the quasioptical tunable and broadband differential phase section (DPS) consisting of several birefringent elements (BE) on the basis of form birefringence effect. Design/methodology/approach: Using the polarization scattering matrix
O. S. Kosiak, V. I. Bezborodov, Ye. M. Kuleshov, P. K. Nesterov   +3 more
doaj   +1 more source

Properties of InxGa1−xN films in terahertz range

Applied Physics Letters, 2012
In this letter, we report the characterization of the refractive indices and complex conductivities of a set of GaN films with different carrier concentrations, InN film, and InxGa1−xN films with indium content varying from x = 0.07 to x = 0.14 grown by metalorganic chemical vapor deposition for frequencies ranging from 0.3 to 3 THz using terahertz ...
Gauthier-Brun, A., Teng, J.H., Dogheche, El Hadj, Liu, W., Gokarna, A., Tonouchi, M., Chua, S.J., Decoster, Didier   +7 more
openaire   +2 more sources

Dielectric behavior of CaCu_3Ti_4O_12 ceramics in the terahertz range

Optics Express, 2011
The dielectric properties of 1050 °C/12h sintered CaCu3Ti4O12 (CCTO) ceramics have been investigated by using terahertz time domain spectroscopy in the frequency range of 0.2-1.6 THz at room temperature. When applying an external optical field, an obvious variation of dielectric constant was observed and reached up to 7%.
Liang, Wu, Furi, Ling, Ting, Liu, Jinsong, Liu, Yebin, Xu, Jianquan, Yao   +5 more
openaire   +2 more sources