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Temperature dependence of the receiver noise temperature and if bandwidth of superconducting hot electron bolometer mixers
Superconductor Science and Technology. 2014. Vol. 27. No. 8. P. 085013.
In this paper we study the temperature dependence of the receiver noise temperature and IF noise bandwidth of superconducting hot electron bolometer (HEB) mixers. Three superconducting NbN HEB devices of different transition temperatures (Tc) are measured at 0.85 THz and 1.4 THz at different bath temperatures (Tbath) between 4 K and 9 K. Measurement results demonstrate that the receiver noise temperature of superconducting NbN HEB devices is nearly constant for Tbath/Tc, less than 0.8, which is consistent with the simulation based on a distributed hot-spot model. In addition, the IF noise bandwidth appears independent of Tbath/ Tc, indicating the dominance of phonon cooling in the investigated HEB devices.
Shurakov A., Lobanov Y., Goltsman G., Superconductor Science and Technology 2015 Vol. 29 No. 2 P. 023001
The discovery of hot-electron phenomena in a thin superconducting film in the last century was followed by numerous experimental studies of its appearance in different materials aiming for a better understanding of the phenomena and consequent implementation of terahertz detection systems for practical applications. In contrast to the competitors such as superconductor-insulator-superconductor tunnel junctions and ...
Added: February 19, 2016
Tong C. E., Trifonov A., Shurakov A. et al., IEEE Transactions on Applied Superconductivity 2015 Vol. 25 No. 3 P. 1-4
A new class of microwave-operated THz power detectors based on the NbN hot-electron-bolometer (HEB) mixer is proposed. The injected microwave signal (~1 GHz) serves the dual purpose of pumping the HEB element and enabling the read-out of the internal state of the device. A cryogenic amplifier amplifies the reflected microwave signal from the device and ...
Added: October 15, 2015
Pentina I. V., Smirnov K., Ryabchun S. et al., Technical Physics 2012 Vol. 57 No. 7 P. 971-974
We present the results of our studies of the semiconducting superlattice (SSL) frequency multiplier and its application as part of the solid state local oscillator (LO) in the terahertz heterodyne receiver based on a NbN hot-electron bolometer (HEB) mixer. We show that the SSL output power level increases as the ambient temperature is lowered to ...
Added: October 12, 2017
Lobanov Y., Shcherbatenko M., Finkel M. I. et al., IEEE Transactions on Applied Superconductivity 2015 Vol. 25 No. 3 P. 1-4
Traditionally, hot-electron-bolometer (HEB) mixers are employed for THz and “super-THz” heterodyne detection. To explore the near-IR spectral range, we propose a fiber-coupled NbN film based HEB mixer. To enhance the incident-light absorption, a quasi-antenna consisting of a set of parallel stripes of gold is used. To study the antenna effect on the mixer performance, we ...
Added: October 15, 2015
Tret’yakov I. V., Kaurova N. S., Voronov B. M. et al., Technical Physics Letters 2016 Vol. 42 No. 6 P. 563-566
Results of an experimental study of the noise temperature (Tn) and noise bandwidth (NBW) of the superconductor NbN hot-electron bolometer (HEB) mixer as a function of its temperature (Tb) are presented. It was determined that the NBW of the mixer is significantly wider at temperatures close to the critical ones (Tc) than are values measured ...
Added: October 20, 2016
Angeluts A. A., Bezotosnyi V. V., Cheshev E. A. et al., Laser Physics Letters 2014 Vol. 11 No. 1 P. 015004
We describe a compact dual-wavelength (1.047 and 1.053 μm) diode end-pumped Q-switched Nd:YLE laser source which has a number of applications in demand. In order to achieve its dual-wavelength operation it is suggested for the first time to use essentially nonmonotonous dependences of the threshold pump powers at these wavelengths on the cavity length in ...
Added: February 24, 2016
Shcherbatenko M., Tretyakov I., Lobanov Y. et al., Applied Physics Letters 2016 Vol. 109 No. 13 P. 132602-1-132602-4
We present a physically consistent interpretation of the dc electrical properties of niobiumnitride (NbN)-based superconducting hot-electron bolometer mixers, using concepts of nonequilibrium superconductivity. Through this, we clarify what physical information can be extracted from the resistive transition and the dc current-voltage characteristics, measured at suitably chosen temperatures, and relevant for device characterization and optimization. We ...
Added: October 20, 2016
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
Tretyakov I., Ryabchun S., Finkel M. et al., Applied Physics Letters 2011 Vol. 98 No. 3 P. 033507
We report a record double sideband noise temperature of 600 K (5h/ k B) offered by a NbN hot-electron bolometer receiver at 2.5 THz. Allowing for standing wave effects, this value was found to be constant in the intermediate frequency range 1-7 GHz, which indicates that the mixer has an unprecedentedly large noise bandwidth in ...
Added: July 1, 2014
Lobanov Y., Shcherbatenko M. L., Shurakov A. et al., Optics Letters 2014 Vol. 39 No. 6 P. 1429-1432
We report on the development of a highly sensitive optical receiver for heterodyne IR spectroscopy at the communication wavelength of 1.5 μm (200 THz) by use of a superconducting hot-electron bolometer. The results are important for the resolution of narrow spectral molecular lines in the near-IR range for the study of astronomical objects, as well ...
Added: February 24, 2016
Gusev N., Dgheparov Daniil, Pugach N. et al., Applied Physics Letters 2021 Vol. 118 P. 1-6
We propose a method to control a bilayer superconducting spin valve (SSV) which does not perturb its superconducting state and is suitable for energy saving cryogenic electronics. This SSV consists of a superconducting layer and a helimagnetic layer of B20 family compounds, namely, Nb and spiral antiferromagnet MnSi. Thanks to unique properties of MnSi—broken inversion ...
Added: June 29, 2021
Smirnov K., Вахтомин Ю. Б., Смирнов А. В. et al., Вестник Новосибирского государственного университета. Серия: Физика 2010 Т. 5 № 4 С. 63-67
This work presents the results of the development and fabrication of sensitive and ultrafast detectorsbased on thin film superconducting nanostructures: hot-electron bolometers (HEBs) and visible and infrared superconducting singe photon detectors (SSPDs). The main operational principles of the superconducting devices are presentedas well as the technology of fabrication of the detectors and their main types ...
Added: October 12, 2017
Yagovtsev V., Gusev N., Pugach N. et al., Superconductor Science and Technology 2021 Vol. 34 Article 025003
The magnetization in a superconductor induced due to the inverse proximity effect is
investigated in hybrid bilayers containing a superconductor and a ferromagnetic
insulator or a strongly spin-polarized ferromagnetic metal. The study is performed
within a quasiclassical Green function framework, wherein Usadel equations are solved
with boundary conditions appropriate for strongly spin-polarized ferromagnetic
materials. A comparison with recent experimental data ...
Added: December 7, 2020
Vasenko A.S., Kawabata S., Ozaeta A. et al., Journal of Magnetism and Magnetic Materials 2015 Vol. 383 P. 175-179
Ferromagnetic materials with exchange fields E_ex smaller or of the order of the superconducting gap Delta are important for applications of corresponding (s-wave) superconductor/ ferromagnet/ superconductor (SFS) junctions. Presently such materials are not known but there are several proposals how to create them. Small exchange fields are in principle difficult to detect. Based on our ...
Added: September 28, 2015
Smirnov K., Moshkova M., Antipov A. et al., IEEE Transactions on Applied Superconductivity 2021 Vol. 31 No. 2 P. 1-4
In this article, present the first detailed study of cascade switching in superconducting photon number resolving detectors. The detectors were made in the form of four parallel nanowires, coupled with the single-mode optical fiber and mounted into a closed-cycle refrigerator with a temperature of 2.1 K. We found out the value of additional false pulses ...
Added: January 16, 2021
Kawabata S., Vasenko A.S., Ozaeta A. et al., Journal of Magnetism and Magnetic Materials 2015 Vol. 383 P. 157-161
We investigate electron cooling based on a clean normal-metal/spin-filter/superconductor junction. Due to the suppression of the Andreev reflection by the spin-filter effect, the cooling power of the system is found to be extremely higher than that for conventional normal-metal/nonmagnetic-insulator/superconductor coolers. Therefore we can extract large amount of heat from normal metals. Our results strongly indicate ...
Added: September 28, 2015
Stepanov N., Skvortsov M. A., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 97 No. 14 P. 144517-1-144517-16
We study the effect of superconducting fluctuations on the conductivity of metals at arbitrary temperatures T and impurity scattering rates τ−1. Using the standard diagrammatic technique but in the Keldysh representation, we derive the general expression for the fluctuation correction to the dc conductivity applicable for any space dimensionality and analyze it in the case of the film ...
Added: June 6, 2018
Gayduchenko I., Kardakova A., Fedorov G. E. et al., Journal of Applied Physics 2015 Vol. 118 No. 19 P. 194303-1-194303-9
Demand for efficient terahertz radiation detectors resulted in intensive study of the asymmetric carbon nanostructures as a possible solution for that problem. It was maintained that photothermoelectric effect under certain conditions results in strong response of such devices to terahertz radiation even at room temperature. In this work, we investigate different mechanisms underlying the response ...
Added: February 19, 2016
Семенов А. В., Девятов И. А., Третьяков И. В. et al., Журнал радиоэлектроники 2011 № 11
Nonlinear Ginzburg-Landau equation for dirty supercondicting 1D wire is derived in the limit of high magnetic field. ...
Added: October 12, 2017
Ryabchun S., Tong E., Blundell R. et al., IEEE Transactions on Applied Superconductivity 2009 Vol. 19 No. 1 P. 14-19
We present the results of a stabilization scheme for terahertz receivers based on NbN hot-electron bolometer (HEB) mixers that uses microwave radiation with a frequency much lower than the gap frequency of NbN to compensate for mixer current fluctuations. A feedback control loop, which actively controls the power level of the injected microwave radiation, has ...
Added: July 1, 2014
Trifonov A., Tong E., Blundell R. et al., IEEE Transactions on Applied Superconductivity 2015 Vol. 25 No. 3 P. 1-4
Using a microwave probe as a tool, we have performed experiments aimed at understanding the origin of the output-power fluctuations in hot-electron-bolometer (HEB) mixers. We use a probe frequency of 1.5 GHz. The microwave probe picks up impedance changes of the HEB, which are examined upon demodulation of the reflected wave outside the cryostat. This ...
Added: March 27, 2015
Arutyunov K., Sedov E., Golokolenov I. et al., Physics of the Solid State, Springer Nature Switzerland AG 2019 Vol. 61 No. 9 P. 1559-1562
High-quality aluminum films on GaAs substrates are studied experimentally. The critical temperature of superconductivity is found to increase markedly with decreasing the film thickness. The observed phenomenon is considered as a manifestation of the quantum confinement effect, which affects both the density of states and the electron–phonon interaction. ...
Added: September 14, 2019
Goltsman G., Antipov S., Trifonov A. et al., Superconductor Science and Technology 2019 Vol. 32 No. 7 P. 1-7
We report on the signal-to-noise and gain bandwidth of a niobium nitride (NbN) hot-electron bolometer (HEB) mixer at 2 THz fabricated on a sapphire substrate with a GaN buffer layer. Two mixers with different DC properties and geometrical dimensions were studied and they demonstrated very close bandwidth performance. The signal-to-noise bandwidth is increased to 8 ...
Added: October 30, 2019
Duarte E. C., Sardella E., Teixeira Saraiva T. et al., / Cornell University. Series cond-mat "arxiv.org". 2022. No. 2209.
The presence of magnetic fields and/or transport currents can cause penetration of vortices in superconductors. Their motion leads to dissipation and resistive state arises, which in turn strongly affects the performance of superconducting devices such as single-photon and single-electron detectors. Therefore, an understanding of the dissipation mechanisms in mesoscopic superconductors is not only of fundamental ...
Added: November 7, 2022