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Graphene-layer and graphene-nanoribbon FETs as THz detectors
Journal of Physics: Conference Series. 2018. Vol. 1124. No. 5. Article 051054.
We report on detection of sub-THz radiation (129-430 GHz) using graphene based asymmetric field-effect transistor (FET) structures with different channel geometry: monolayer graphene, graphene nanoribbons. In all devices types we observed the similar trends of response on sub-THz radiation. The response fell with increasing frequency at room temperature, but increased with increasing frequency at 77 K. Our calculations show that the change in the trend of the frequency dependence at 77 K is associated with the appearance of plasma waves in the graphene channel. Unusual properties of p-n junctions in graphene are highlighted using devices of special geometry.
Shabanov A., Moskotin M., Belosevich V. et al., Applied Physics Letters 2021 Vol. 119 No. 16 Article 163505
Detectors of terahertz radiation based on field-effect transistors (FETs) are among the most promising candidates for low-noise passive signal rectification both in imaging systems and wireless communications. However, it was not realized so far that geometric asymmetry of common FETs with respect to source-drain interchange is a strong objective to photovoltage harvesting. Here, we break ...
Added: May 20, 2022
Y. Matyushkin, Danilov S., Moskotin M. et al., Optics Express 2021 Vol. 29 No. 23 P. 37189-37199
We report on helicity sensitive photovoltaic terahertz radiation response of a carbon nanotube made in a configuration of a field-effect transistor. We find that the magnitude of the rectified voltage is different for clockwise and anticlockwise circularly polarized radiation. We demonstrate that this effect is a fingerprint of the plasma waves interference in the transistor ...
Added: May 20, 2022
Yakov Matyushkin, Sergey D., Maxim M. et al., Nano Letters 2020 Vol. 20 No. 10 P. 7296-7303
Plasmonic interferometry is a rapidly growing area of research with a huge potential for applications in the terahertz frequency range. In this Letter, we explore a plasmonic interferometer based on graphene field effect transistor connected to specially designed antennas. As a key result, we observe helicity- and phase-sensitive conversion of circularly polarized radiation into dc ...
Added: March 2, 2021
Gazaliev A. S., Moskotin M. V., V V Belosevich et al., Journal of Physics: Conference Series 2021 Vol. 2086 No. 1 Article 012054
The growing requirements for mobile communication networks (data transfer rates over 100 Gbps) makes it necessary to use carrier signal with a frequency of at least 100 GHz. This requires the development of cheap and broadband sub-terahertz (sub-THz) detectors. Here we report on our recent efforts toward the development of a heterodyne sub-THz detector based ...
Added: August 1, 2022
Grebenko A. K., Krasnikov D. V., Bubis A. et al., Advanced Science 2022 Vol. 9 No. 12 Article 2200217
Following the game-changing high-pressure CO (HiPco) process that
established the first facile route toward large-scale production of single-walled
carbon nanotubes, CO synthesis of cm-sized graphene crystals of ultra-high
purity grown during tens of minutes is proposed. The Boudouard reaction
serves for the first time to produce individual monolayer structures on the
surface of a metal catalyst, thereby providing a chemical ...
Added: December 11, 2022
Ghazaryan D., Greenaway M. T., Wang Z. et al., Nature Electronics 2018 Vol. 1 No. 6 P. 344-349
The growing family of two-dimensional (2D) materials1-3 can be used to assemble van der Waals heterostructures with a wide range of properties4-6 . Of particular interest are tunnelling heterostructures7-9 , which have been used to study the electronic states both in the tunnelling barrier and in the emitter and collector contacts10,11. Recently, 2D ferromagnets have ...
Added: October 31, 2018
Alexey A. Sokolik, Yurii E. Lozovik, Physical Review B: Condensed Matter and Materials Physics 2019 Vol. 100 No. 12 P. 125409-1-125409-8
Magnetoplasmons on graphene edges in quantizing magnetic fields are investigated at different Landau-level filling factors. To find the mode frequency, the optical conductivity tensor of disordered graphene in a magnetic field is calculated in the self-consistent Born approximation, and the nonlocal electromagnetic problem is solved using the Wiener-Hopf method. Magnetoplasmon dispersion relations, velocities, and attenuation ...
Added: October 18, 2019
Gayduchenko I., Xu S. G., Alymov G. et al., Nature Communications 2021 Vol. 12 No. 1 Article 543
The rectification of electromagnetic waves to direct currents is a crucial process for energy harvesting, beyond-5G wireless communications, ultra-fast science, and observational astronomy. As the radiation frequency is raised to the sub-terahertz (THz) domain, ac-to-dc conversion by conventional electronics becomes challenging and requires alternative rectification protocols. Here, we address this challenge by tunnel field-effect transistors ...
Added: September 27, 2021
Lozovik Y., Nechepurenko I. A., Andrianov E. S. et al., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 94 No. July P. 035406
The development of active and passive plasmonic devices is challenging due to the high level of dissipation in normal metals. One possible solution to this problem is using alternative materials. Graphene is a good candidate for plasmonics in the near-infrared region. In this paper, we develop a quantum theory of a graphene plasmon generator. We account for quantum correlations ...
Added: September 14, 2016
Prikhodko A., Yaropolov T., Shurakov A. et al., CAL-TEK S.r.l., 2022
Mastering of the terahertz frequency band is attractive for numerous practical applications. Fabrication tolerances of widely used computer numerical control machining result in vital increase of input optics losses of active waveguide components at frequencies beyond 1 THz. This issue can be resolved if conventional hollow metallic waveguide technology is replaced by that making use ...
Added: June 6, 2023
Zvyagina A., Melnikova E., Averin A. et al., Carbon 2018 Vol. 134 P. 62-70
Fabrication of graphene-based surface coatings through self-assembly may provide an affordable alternative to chemical vacuum deposition. Herein, we exploited the self-assembly of graphene oxide at the oil/water interfaces to form monolayers of 2D carbons on solid surfaces with different surface energy. We showed that interfacial monolayers with controlled packing density of graphene oxide can be ...
Added: July 16, 2018
Shurakov A., Mikhalev P., Михайлов Д. М. et al., Microelectronic Engineering 2018 Vol. 195 P. 26-31
In this paper we report on the results of the study of the Ti/Au
/ n-GaAs planar Schottky diodes (PSD) intended for the wideband detection of
terahertz radiation. The two types of the PSD devices were compared having
either the dual n/n+ silicon dopant profle or the triple one with a moderately
doped matching sublayer inserted. All the diodes ...
Added: September 4, 2023
Екомасов Е. Г., Степанов С. В., Назаров В. Н. et al., Письма в Журнал технической физики 2021 Т. 47 № 17 С. 26-28
The joint effect of a spin-polarized current and an external magnetic field on the magnetization
dynamics in vortex spin-transfer nano-oscillators 400 nm in diameter has been investigated. The coupled
dynamics of magnetic vortices has been calculated numerically using the SpinPM software package for
micromagnetic simulation. The dependence of the frequency of stationary coupled vortex oscillations on the
magnetic field, ...
Added: March 26, 2022
A Prikhodko, I Belikov, Mikhailov D. et al., Journal of Physics: Conference Series 2021 Vol. 2086 No. 1 Article 012063
We propose the design of a dual-pixel array of Schottky diodes. Each diode is fixed between the bow-tie antenna arms on top of a SI-GaAs membrane acting as a waveguide backshort for efficient coupling of the antenna to the feedline of high-directivity horn. The detector utilizes a single RF output line: microwave reflectometer is used ...
Added: May 18, 2022
Minkin A., Lebedeva I., Popov A. et al., Physical Review B: Condensed Matter and Materials Physics 2023 Vol. 108 No. 8 Article 085411
The potential energy surface (PES) of the interlayer interaction of infinite twisted bilayer graphene is calculated for a set of commensurate moiré patterns using the registry-dependent Kolmogorov-Crespi empirical potential. The calculated PESs have the same shape for all considered moiré patterns, and the unit cell size of the PESs is inversely related to the unit ...
Added: August 22, 2023
Kagan M. Yu., Val’kov V. V., Mitskan V. A. et al., Solid State Communications 2014 Vol. 188 P. 61-66
Idealized graphene monolayer is considered neglecting the van der Waals potential of the substrate and the role of the nonmagnetic impurities. The effect of the long-range Coulomb repulsion in an ensemble of Dirac fermions on the formation of the superconducting pairing in a monolayer is studied in the framework of the Kohn–Luttinger mechanism. The electronic ...
Added: April 1, 2015
Burmistrov I., Gornyi I. V., Kachorovskii V. Y. et al., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 No. 125402 P. 125402-1-125402-19
We demonstrate that a key elastic parameter of a suspended crystalline membrane—the Poisson ratio (PR) ν—is a nontrivial function of the applied stress σ and of the system size L, i.e., ν=νL(σ). We consider a generic two-dimensional membrane embedded into space of dimensionality 2+dc. (The physical situation corresponds to dc=1.) A particularly important application of our results is to freestanding graphene. We ...
Added: June 6, 2018
Shurakov A., Prikhodko A., Mikhailov D. et al., Journal of Physics: Conference Series 2020 Vol. 1695 No. 1 Article 012156
In this paper we report on the results of investigation of efficiency of a microwave reflectometry for readout of a terahertz multipixel Schottky diode direct detector. Decent capabilities of the microwave reflectometry readout were earlier justified by us for a hot electron bolometric direct detector. In case of a planar Schottky diode, we observed increase ...
Added: May 17, 2022
Tomi M., M.R. Samatov, A.S. Vasenko et al., Physical Review B: Condensed Matter and Materials Physics 2021 Vol. 104 Article 134513
We study, both theoretically and experimentally, the features on the current-voltage characteristic of a highly transparent Josephson junction caused by transition of the superconducting leads to the normal state. These features appear due to the suppression of the Andreev excess current.We show that by tracing the dependence of the voltage, at which the transition occurs, ...
Added: October 24, 2021
Andrianov E. S., Zyablovsky A. A., Dorofeenko A. V. et al., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 98 No. 07-5411 P. 075411-1-075411-8
Plasmon spectroscopy methods are highly sensitive to the small volumes of material due to subwavelength localization of light increasing light-matter interaction. Recent research has shown a high potential of plasmon quantum generator (spaser) or amplifier (sped) for sensing in the infrared optical region. Trinitrotoluene (TNT) molecules fingerprints are considered as an example. Basing on Lindblad ...
Added: October 22, 2018
Kuntsevich A., Shupletsov A. V., Minkov G. M., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 P. 195431-1-195431-8
The phase of quantum magneto-oscillations is often associated with the Berry phase and is widely used to
argue in favor of topological nontriviality of the system (Berry phase 2πn + π). Nevertheless, the experimentally
determined value may deviate from 2πn + π arbitrarily, therefore more care should be made analyzing the
phase of magneto-oscillations to distinguish trivial systems ...
Added: September 10, 2018
Kovaleva N. N., Chvostova D., Potůčhek Z. et al., 2D Materials 2019 Vol. 6 No. 4 P. 045021-1-045021-10
Plasma functionalization of graphene is one of the facile ways to tune its doping level without the
need for wet chemicals making graphene photoluminescent. Microscopic corrugations in the twodimensional
structure of bilayer CVD graphene having a quasi-free-suspended top layer, such as
graphene ripples, nanodomes, and bubbles, may significantly enhance local reactivity leading to
etching effects on exposure to plasma. ...
Added: October 21, 2019
Evlashin S., Fedorov F. S., Dyakonov P. V. et al., The Journal of Physical Chemistry Letters 2020 Vol. 11 No. 12 P. 4859-4865
Supercapacitors based on carbon nanomaterials are attracting much attention because of their high capacitance enabled by large specific surface area. The introduction of heteroatoms such as N or O enhances the specific capacitance of these materials. However, the mechanisms that lead to the increase in the specific capacitance are not yet well-studied. In this Letter, we ...
Added: June 4, 2020
Shurakov A., Mikhailov D., Belikov I. et al., Journal of Physics: Conference Series 2020 Vol. 1695 No. 1 Article 012154
In this paper we report on the fabrication of a planar Schottky diode utilizing a Г-shaped anode suspended bridge. The bridge maintains transition between the top and bottom level planes of a 1.4 µm thick GaAs mesa. To implement the profile of a suspended bridge and inward tilt of a mesa wall adjacent to it, ...
Added: May 18, 2022