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Characterization of MoSi Superconducting Single-Photon Detectors in the Magnetic Field
IEEE Transactions on Applied Superconductivity. 2015. Vol. 25. No. 3. P. 1-4.
Korneev A., Korneeva Y., Mikhailov M., Pershin Y., Semenov A., Vodolazov D., Divochiy A., Vakhtomin Y., Smirnov K., Sivakov A., Devizenko A., Goltsman G.
We investigate the response mechanism of nanowire superconducting single-photon detectors (SSPDs) made of amorphous MoxSi1-x. We study the dependence of photon count and dark count rates on bias current in magnetic fields up to 113 mT at 1.7 K temperature. The observed behavior of photon counts is similar to the one recently observed in NbN SSPDs. Our results show that the detecting mechanism of relatively high-energy photons does not involve the vortex penetration from the edges of the film, and on the contrary, the detecting mechanism of low-energy photons probably involves the vortex penetration from the film edges.
Korneeva Y., Mikhailov M., Pershin Y. et al., Superconductor Science and Technology 2014 Vol. 27 No. 9 P. 095012
We fabricated and characterized nanowire superconducting single-photon detectors made of 4 nm thick amorphous Mo x Si1−x films. At 1.7 K the best devices exhibit a detection efficiency (DE) up to 18% at 1.2 <img /> wavelength of unpolarized light, a characteristic response time of about 6 ns and timing jitter of 120 ps. The ...
Added: March 31, 2015
Sidorova M. V., Semenov A., Korneev A. et al., / Cornell University. Series cond-mat "arxiv.org". 2016. No. 1607.07321.
Using amplitude-modulated absorption of sub-THz radiation (AMAR) method, we studied electron-phonon relaxation in thin disordered films of tungsten silicide. We found a response time ~ 800 ps at critical temperature Tc = 3.4 K, which scales as minus 3 in the temperature range from 1.8 to 3.4 K. We discuss mechanisms, which can result in ...
Added: December 6, 2017
Pentin I., Seleznev V., Vakhtomin Y. et al., Scientific Reports 2020 Vol. 10 No. 1 P. 1-8
The paper presents the experimental results of studying the dynamics of electron energy relaxation in structures made of thin (d ≈ 6 nm) disordered superconducting vanadium nitride (VN) films converted to a resistive state by high-frequency radiation and transport current. Under conditions of quasi-equilibrium superconductivity and temperature range close to critical (~ Tc), a direct measurement of the energy ...
Added: December 10, 2020
Eminov P. A., Ternov A. I., Physics of Particles and Nuclei 2014 Vol. 45 No. 2 P. 397-408
A review of the current status of the theory of massive neutrino radiative decay is presented. We develop our previous studies and perform the detailed analysis of the process of radiative decay of a massive Dirac neutrino in an intense external magnetic field in the presence of medium. The probability of the mentioned above process ...
Added: January 30, 2014
Arutyunov K., Sedov E., Golokolenov I. et al., Физика твердого тела 2019 Т. 61 № 9 С. 1609-1613
Экспериментально исследовались высококачественные пленки алюминия на подложках из GaAs. Был обнаружен заметный рост критической температуры сверхпроводящего перехода с уменьшением толщины пленки. Эффект интерпретируется как проявление квантового размерного эффекта, влияющего как на плотность состояний электронов, так и на электрон-фононное взаимодействие. ...
Added: September 14, 2019
Zhang X., Adriana L., Smirnov K. et al., Physical Review B: Condensed Matter and Materials Physics 2020 Vol. 101 No. 6 Article 060508
We have investigated a series of superconducting bridges based on homogeneous amorphous WSi and MoSi films, with bridge widths w ranging from 2 to 1000m and film thicknesses d4−6 and 100 nm. Upon decreasing the bridge widths below the respective Pearl lengths, we observe in all cases distinct changes in the characteristics of the resistive ...
Added: December 10, 2020
Beck M., Rousseau I., Klammer M. et al., Physical Review Letters 2013 Vol. 110 No. 26
Added: March 2, 2015
Korneev Alexander, Korneeva Y., Manova N. et al., IEEE Transactions on Applied Superconductivity 2013 Vol. 23 No. 3 P. 2201204
In this paper, we present our approaches to the development of fiber-coupled superconducting single photon detectors with enhanced photon absorption. For such devices we have measured detection efficiency in wavelength range from 500 to 2000 nm. The best fiber coupled devices exhibit detection efficiency of 44.5% at 1310 nm wavelength and 35.5% at 1550 nm ...
Added: March 7, 2014
Smirnov K., Zolotov P., Divochiy A. et al., KnE Energy & Physics 2018 Vol. 2018 P. 83-89
We optimized technology of thin VN films deposition in order to study VN-based superconducting single-photon detectors. Investigation of the main VN film parameters showed that this material has lower resistivity compared to commonly used NbN. Fabricated from obtained films devices showed 100% intrinsic detection efficiency at 900 nm, at the temperature of 1.7 K starting ...
Added: October 25, 2019
Elezov M. S., Ozhegov R., Kurochkin Y. V. et al., EPJ Web of Conferences 2015 Vol. 103 P. 10002-p.1-10002-p.2
Nowadays, the superconducting single-photon detectors (SSPDs) are used in Quantum Key Distribution (QKD) instead of single-photon avalanche photodiodes. Recently bright-light control of the SSPD has been demonstrated. This attack employed a "backdoor" in the detector biasing technique. We developed the autoreset system which returns the SSPD to superconducting state when it is latched. We investigate ...
Added: October 13, 2017
Korneeva Y., Smirnov K. V., Mikhailov M. et al., Superconductor Science and Technology 2014 No. 27
Added: March 2, 2015
Smirnov K., Vachtomin Y., Divochiy A. et al., Applied Physics Express 2015 Vol. 8 No. 2
Added: March 27, 2015
Elezov M. S., Ozhegov R., Goltsman G. et al., EPJ Web of Conferences 2017 Vol. 132 P. 1-2
Recently bright-light control of the SSPD has been demonstrated. This attack employed a "backdoor" in the detector biasing scheme. Under bright-light illumination, SSPD becomes resistive and remains "latched" in the resistive state even when the light is switched off. While the SSPD is latched, Eve can simulate SSPD single-photon response by sending strong light pulses, ...
Added: October 13, 2017
Shurakov A., Tong C. -., Grimes P. et al., IEEE Transactions on Terahertz Science and Technology 2015 Vol. 5 No. 1 P. 81-84
In this paper, we propose and present data from a fast THz detector based on the repurpose of hot electron bolometer mixers (HEB) fabricated from superconducting NbN thin film. This detector is essentially a traditional NbN bolometer element that operates under the influence of a microwave pump. The injected microwave power serves the dual purpose ...
Added: February 19, 2016
Pernice W., Schuck C., Minaeva O. et al., Nature Communications 2012 No. 3
Added: March 2, 2015
Eminov P. A., Sezonov Y. I., Gordeeva S. V., Physics of the Solid State 2014 Vol. 56 No. 3 P. 429-437
A numerical and analytical investigation of thermodynamic properties of a magnetized superconducting quantum cylinder has been carried out. The dependence of the difference in the magnetizations of the superconducting and normal phases on the parameters of the nanotube,temperature, and magnetic field has been analyzed. The jump in the heat capacity of the superconducting and normal ...
Added: July 4, 2014
Ksenz A. S., Stolyarov V. S., Chekmazov S. V. et al., Physical Review B: Condensed Matter and Materials Physics 2018 Vol. 98 P. 155440
Proximity phenomena between superconductors and topological semimetals are at the heart of the search for novel quantum states of matter. Here we show that the epitaxial interface between one- to three-atomic-layer Pb and the Sb(111) substrate has extremely high electronic transparency. As a result, Pb loses its superconducting and even its metallic properties; its electronic ...
Added: January 27, 2020
Korneeva Y., Sidorova M., Semenov A. et al., IEEE Transactions on Applied Superconductivity 2016 Vol. 26 No. 3 P. 1-4
We report an experimental investigation of the hot spot evolution in superconducting single photons detectors (SSPDs) made of disordered superconducting materials with different diffusivity and energy down-conversion time: 33-nmthickNbN and 23-nm-thick NbC films. We have demonstrated that in NbC film only 405 nm photons produce sufficiently largehot-spot to trigger a single-photon response. The dependence of ...
Added: October 9, 2015
Photon counting statistics of superconducting single-photon detectors made of a three-layer WSi film
Goltsman G., Florya I., Korneeva Y. et al., Low Temperature Physics 2018 Vol. 44 No. 3 P. 221-225
Superconducting nanowire single-photon detectors (SNSPD) are used in quantum optics when record-breaking time resolution, high speed, and exceptionally low levels of dark counts (false readings) are required. Their detection efficiency is limited, however, by the absorption coefficient of the ultrathin superconducting film for the detected radiation. One possible way of increasing the detector absorption without ...
Added: July 31, 2018
Korneev A., Hubers H., Semenov A. et al., Physical Review B: Condensed Matter and Materials Physics 2014 Vol. 89
We have studied the influence of an externally applied magnetic field on the photon and dark count rates of meander-type niobium nitride superconducting nanowire single-photon detectors. Measurements have been performed at a temperature of 4.2 K, and magnetic fields up to 250 mT have been applied perpendicularly to the meander plane. While photon count rates ...
Added: March 2, 2015
Krause S., Mityashkin V., Antipov S. et al., IEEE Transactions on Terahertz Science and Technology 2017 Vol. 7 No. 1 P. 53-59
In this paper, we investigated the influence of the GaN buffer layer on the phonon escape time of phonon-cooled hot electron bolometers (HEBs) based on NbN material and compared our findings to conventionally employed Si substrate. The presented experimental setup and operation of the HEB close to the critical temperature of the NbN film allowed ...
Added: February 22, 2017
Schuck C., Pernice W., Minaeva O. et al., IEEE Transactions on Applied Superconductivity 2013 Vol. 23 No. 3
Added: March 2, 2015
Eminov P. A., Sezonov Y. I., Gordeeva S., Diamond and Related Materials 2014 Vol. 49 P. 72-76
Analysis of the contribution of electron scattering on phonons, longitudinal and flexural resistance in the nanotube in a longitudinal magnetic field has been carried out quantitatively. The dependence of the conductance of the nanostructure on the nanotube radius, surface electron density, temperature, and Aharonov–Bohm parameter in the case of an isotropic phonon spectrum and taking ...
Added: November 23, 2014
Tretyakov I., Finkel M., Ryabchun S. et al., Radiophysics and Quantum Electronics 2014 Vol. 56 No. 8 P. 591-598
We report on the latest achievements in the development of superconducting hot-electron bolometer (HEB) mixers for terahertz superheterodyne receivers. We consider application ranges of such receivers and requirements for the basic characteristics of the mixers. Main features of the mixers, such as noise temperature, gain bandwidth, noise bandwidth, and required local-oscillator power, have been improved ...
Added: July 1, 2014