?
Manifestation of plasmonic response in the detection of sub-terahertz radiation by graphene-based devices
Nanotechnology. 2018. Vol. 29. No. 24. P. 245204-245212.
Gayduchenko I. A., Fedorov G. E., Moskotin M. V., Yagodkin D. I., Seliverstov S. V., Goltsman G., Kuntsevich A. Y., Rybin M. G., Obraztsova E. D., Leiman V. G., Shur M. S., Otsuji T., Ryzhii V. I.
In press
We report on the sub-terahertz (THz) (129–450GHz) photoresponse of devices based on single
layer graphene and graphene nanoribbons with asymmetric source and drain (vanadium and gold)
contacts. Vanadium forms a barrier at the graphene interface, while gold forms an Ohmic contact.
We find that at low temperatures (77K) the detector responsivity rises with the increasing
frequency of the incident sub-THz radiation. We interpret this result as a manifestation of a
plasmonic effect in the devices with the relatively long plasmonic wavelengths. Graphene
nanoribbon devices display a similar pattern, albeit with a lower responsivity.
Fedorov G. E., Gaiduchenko I. A., Golikov A. D. et al., EPJ Web of Conferences 2015 Vol. 103 P. 10003
In this work we report on the response of asymetric graphene based devices to subterahertz and terahertz radiation. Our devices are made in a configuration of a field-effect tranistor with conduction channel between the source and drain electrodes formed with a VD-grown graphene. The radiation is coupled through a spiral antenna to source and top ...
Added: October 15, 2015
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
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
Rodionov Y. I., K.I. Kugel, Nori F., Physical Review B: Condensed Matter and Materials Physics 2016 Vol. 94 No. 19 P. 195108-1-195108-13
Using the Landau-Zener-Stuckelberg-Majorana-type (LZSM) semiclassical approach, we study both graphene and a thin film of aWeyl semimetal subjected to a strong ac electromagnetic field. The spectrum of quasienergies in the Weyl semimetal turns out to be similar to that of a graphene sheet. It has been predicted qualitatively that the transport properties of strongly irradiated ...
Added: February 19, 2017
Seliverstov S., Maslennikov S., Ryabchun S. et al., IEEE Transactions on Applied Superconductivity 2015 Vol. 25 No. 3 P. 1-4
We characterize superconducting antenna-coupled hot-electron bolometers for direct detection of terahertz radiation operating at a temperature of 9.0 K. The estimated value of responsivity obtained from lumped-element theory is strongly different from the measured one. A numerical calculation of the detector responsivity is developed, using the Euler method, applied to the system of heat balance ...
Added: March 27, 2015
Лехтинен Я., Lvov B. G., Arutyunov K., Физика твердого тела 2018 Т. 60 № 11 С. 2096-2099
Экспериментально исследовались вольт-амперные характеристики тонких сверхпроводящих нанопроводов из титана. Наиболее тонкие образцы, измеряемые высокомными контактами, обнаружили нетривиальное для сверхпроводника поведение: кулоновскую блокаду. Величина кулоновской щели коррелирует с частотой квантовых проскальзываний фазы. Наблюдение подтверждает идентичность квантовой динамики заряда в джозефсоновских контактах и в квазиодномерных сверхпроводящих каналах в режиме квантовых флуктуаций параметра порядка. ...
Added: October 30, 2018
Rasulova G. K., Pentin I. V., Vakhtomin Y. B. et al., Journal of Applied Physics 2020 Vol. 128 No. 22 Article 224303
The study of the bolometer response to terahertz (THz) radiation from a double-barrier resonant tunneling diode (RTD) biased into the negative differential conductivity region of the I–V characteristic revealed that the RTD emits two pulses in a period of intrinsic self-oscillations of current. The bolometer pulse repetition rate is a multiple of the fundamental frequency ...
Added: February 4, 2021
S.L. Kovalenko, B.V. Andryushechkin, K.N. Eltsov, Carbon 2020 Vol. 164 P. 198-206
This paper reports an STM study of all stages of the intercalation of oxygen at the interface of a strongly coupled graphene/Ni(111) system prepared by temperature programmed growth (TPG) method. We have found that at the first stage of the intercalation at 120 °C, oxygen forms a chemisorbed layer on Ni(111) with a coverage about 0.26–0.28 ML, ...
Added: December 7, 2020
Iakobson O. D., Gribkova O., Alexey R. Tameev et al., Journal of Industrial and Engineering Chemistry 2018 Vol. 65 P. 309-317
Composites based on graphene and water-dispersible polyaniline-poly(2-acrylamido-2-methyl-1-propanesulfonic acid) complex were shown as materials promising for the development of hole transporting layers (HTLs). By using multimodal atomic force microscopy, transmission electron microscopy, cyclic voltammetry and conductivity measurements, the relationship between the oxidation degree of graphene and the morphology, electrical conductivity and electron energy structure of HTLs was revealed. Utilizing the ...
Added: June 4, 2018
Кик М. А., Богомолов Г. Д., Сигов, А. С. et al., Российский технологический журнал 2019 Т. 7 № 6 С. 122-133
Prospects of developing multi-element receivers for the submillimeter range (SMM) on the basis of thin-film semimetallic sensitive bolometers are considered. Electromagnetic waves of the SMM band have a high penetrating power and allow developing a thermal imager for the detection and observation of objects through various materials: fabrics, cardboard, wood, etc. The previously obtained research ...
Added: January 11, 2020
Yu. E. Lozovik, A. A. Sokolik, Zabolotskiy A. D., Physical Review B: Condensed Matter and Materials Physics 2015 Vol. 91 No. 075416 P. 1-8
Many-body effects on quantum capacitance, compressibility, renormalized Fermi velocity, kinetic and interaction energies of massless Dirac electrons in graphene, induced by the Coulomb interactions, are analyzed theoretically in the first-order, Hartree-Fock and random phase approximations. Recent experimental data on quantum capacitance and renormalized Fermi velocity are analyzed and compared with the theory. The bare Fermi ...
Added: December 24, 2014
Berman O., Kezerashvili R., Lozovik Y., Physical Review B: Condensed Matter and Materials Physics 2013 Vol. 88 No. 23 P. 235424
A novel type of spaser with the net amplification of surface plasmons (SPs) in a doped graphene nanoribbon is proposed. The plasmons in the THz region can be generated in a doped graphene nanoribbon due to nonradiative excitation by emitters like two level quantum dots located along a graphene nanoribbon. The minimal population inversion per ...
Added: January 13, 2014
Kagan M., Mitskan V. A., Korovushkiin M. M., Journal of Superconductivity and Novel Magnetism 2016 Vol. 29 No. 4 P. 1043-1048
We demonstrate the instability of the normal state of purely repulsive fermionic systems towards the transition to the Kohn-Luttinger superconducting state. We construct the superconducting phase diagrams of these systems in the framework of the Hubbard and Shubin-Vonsovsky models on the square and hexagonal lattices. We show that an account for the long-range Coulomb interactions, ...
Added: May 11, 2016
Siahlo A. I., Poklonski N. A., Lebedev A. V. et al., PHYSICAL REVIEW MATERIALS 2018 Vol. 2 No. 03-6001 P. 1-9
Single-layer and bilayer carbon and hexagonal boron nitride nanoscrolls as well as nanoscrolls made of bilayer graphene/hexagonal boron nitride heterostructure are considered. Structures of stable states of the corresponding nanoscrolls prepared by rolling single-layer and bilayer rectangular nanoribbons are obtained based on the analytical model and numerical calculations. The lengths of nanoribbons for which stable ...
Added: October 22, 2018
Gayduchenko I. A., Fedorov G. E., Stepanova T. S. et al., Journal of Physics: Conference Series 2016 Vol. 741 No. 1 P. 012143
Demand for efficient terahertz (THz) radiation detectors resulted in intensive study of the asymmetric carbon nanostructures as a possible solution for that problem. In this work, we systematically investigate the response of asymmetric carbon nanodevices to sub-terahertz radiation using different sensing elements: from dense carbon nanotube (CNT) network to individual CNT. We conclude that the ...
Added: October 20, 2016
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
Ryzhii V., Otsuji T., Ryzhii M. et al., Journal of Applied Physics 2016 Vol. 120 P. 044501-1 -044501-13
We consider the carrier transport and plasmonic phenomena in the lateral carbon nanotube (CNT) networks forming the device channel with asymmetric electrodes. One electrode is the Ohmic contact to the CNT network and the other contact is the Schottky contact. These structures can serve as detectors of the terahertz (THz) radiation. We develop the device ...
Added: October 19, 2016
Iomdina E., Goltsman G., Seliverstov S. et al., Journal of Biomedical Optics 2016 Vol. 21 No. 9 P. 097002
An adequate water balance (hydration extent) is one of the basic factors of normal eye function, including its external shells: the cornea and the sclera. Adequate control of corneal and scleral hydration is very important for early diagnosis of a variety of eye diseases, stating indications for and contraindications against keratorefractive surgeries and the choice ...
Added: October 19, 2016
Goltsman G., Tuchak A. N., Kitaeva G. et al., JETP Letters 2012 Vol. 96 No. 2 P. 94-97
The possibility of the generation of quasi-cw terahertz radiation by the optical rectification method for broad-band Fourier unlimited nanosecond laser pulses has been experimentally demonstrated. The broadband radiation of a LiF dye-center laser is used as a pump source of a nonlinear optical oscillator. The energy efficiency of terahertz optical frequency conversion in a periodically ...
Added: March 2, 2015
Seliverstov S. V., Rusova A. A., Kaurova N. S. et al., Journal of Physics: Conference Series 2016 Vol. 741 No. 1 P. 012165
We characterize superconducting antenna-coupled NbN hot-electron bolometer (HEB) for direct detection of THz radiation operating at a temperature of 9.0 K. At signal frequency of 2.5 THz, the measured value of the optical noise equivalent power is 2.0×10-13 W-Hz-0.5. The estimated value of the energy resolution is about 1.5 aJ. This value was confirmed in ...
Added: October 20, 2016
Миронов Б. Н., Асеев С. А., Sokolik A. A. et al., Журнал экспериментальной и теоретической физики 2018 Т. 154 № 3(9) С. 496-505
Исследована модификация графенового листа, полученного методом химического газофазного осаждения на медной мелкоячеистой сетке, под действием мощного фемтосекундного лазерного излучения. Установлено, что процесс длительного облучения образца в вакууме сопровождается 1) разрывом углеродных связей, о чем свидетельствует уменьшение яркости рефлексов, отвечающих дифракции электронного пучка на графене, и 2) образованием новых продуктов, о чем свидетельствуют появление новых дифракционных ...
Added: October 21, 2018
Gayduchenko I., Fedorov G., Moskotin M. et al., Nanotechnology 2018 Vol. 29 Article 245204
We report on the sub-terahertz (THz) (129–450 GHz) photoresponse of devices based on single layer graphene and graphene nanoribbons with asymmetric source and drain (vanadium and gold) contacts. Vanadium forms a barrier at the graphene interface, while gold forms an Ohmic contact. We find that at low temperatures (77 K) the detector responsivity rises with ...
Added: December 1, 2018
A. A. Melnikov, A. A. Sokolik, Frolov A. V. et al., Applied Physics Letters 2019 Vol. 114 P. 191107-1-191107-5
We have measured the ultrafast anisotropic optical response of highly doped graphene to an intense single cycle terahertz pulse. The time profile of the terahertz-induced anisotropy signal at 800 nm has minima and maxima repeating those of the pump terahertz electric field modulus. It grows with increasing carrier density and demonstrates a specific nonlinear dependence ...
Added: May 21, 2019