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| Author | Gol’tsman, G.; Korneev, A.; Tarkhov, M.; Seleznev, V.; Divochiy, A.; Minaeva, O.; Kaurova, N.; Voronov, B.; Okunev, O.; Chulkova, G.; Milostnaya, I.; Smirnov, K. | ||||
| Title | Middle-infrared ultrafast superconducting single photon detector | Type | Conference Article | ||
| Year | 2007 | Publication  |
32nd IRMW / 15th ICTE | Abbreviated Journal | 32nd IRMW / 15th ICTE |
| Volume | Issue | Pages | 115-116 | ||
| Keywords | SSPD, SNSPD | ||||
| Abstract | We present the results of the research on quantum efficiency of the ultrathin-film superconducting single-photon detectors (SSPD) in the wavelength rage from 1 mum to 5.7 mum. Reduction of operation temperature to 1.6 K allowed us to measure quantum efficiency of ~1 % at 5.7 mum wavelength with the SSPD made from 4-nm-thick NbN film. In a pursuit of further performance improvement we endeavored SSPD fabricating from 4-nm-thick MoRe film as an alternative material. The MoRe film exhibited transition temperature of 7.7K, critical current density at 4.2 K temperature was 1.1times10 6 A/cm 2 , and diffusivity 1.73 cmVs. The single-photon response was observed with MoRe SSPD at 1.3 mum wavelength with quantum efficiency estimated to be 0.04%. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 1246 | |||
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| Author | Palma, F.; Teppe, F.; Fatimy, A. E.; Green, R.; Xu, J.; Vachontin, Y.; Tredicucci, A.; Goltsman, G.; Knap, W. | ||||
| Title | THz communication system based on a THz quantum cascade laser and a hot electron bolometer | Type | Conference Article | ||
| Year | 2010 | Publication |
35th Int. Conf. Infrared, Millimeter, and Terahertz Waves | Abbreviated Journal | 35th Int. Conf. Infrared, Millimeter, and Terahertz Waves |
| Volume | Issue | Pages | 11623798 (1 to 2) | ||
| Keywords | QCL, HEB detector | ||||
| Abstract | We present the experimental study of the direct emission – detection system based on the THz Quantum Cascade Laser as a source and Hot Electron Bolometer (HEB) detector – in view of its application as an optical communication system. We show that the system can efficiently transmit the QCL Terahertz pulses. We estimate the maximal modulation speed of the system to be about several GHz and show that it is limited only by the QCL pulse power supply, detector amplifier and connection line/wires parameters. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 1391 | |||
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| Author | Goltsman, G. N.; Korneev, A. A.; Finkel, M. I.; Divochiy, A. V.; Florya, I. N.; Korneeva, Y. P.; Tarkhov, M. A.; Ryabchun, S. A.; Tretyakov, I. V.; Maslennikov, S. N.; Kaurova, N. S.; Chulkova, G. M.; Voronov, B. M. | ||||
| Title | Superconducting hot-electron bolometer as THz mixer, direct detector and IR single-photon counter | Type | Abstract | ||
| Year | 2010 | Publication |
35th Int. Conf. Infrared, Millimeter, and Terahertz Waves | Abbreviated Journal | |
| Volume | Issue | Pages | 1-1 | ||
| Keywords | SSPD, SNSPD, HEB | ||||
| Abstract | We present a new generation of superconducting single-photon detectors (SSPDs) and hot-electron superconducting sensors with record characteristic for many terahertz and optical applications. | ||||
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| Series Volume | Series Issue | Edition | |||
| ISSN | 2162-2027 | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | RPLAB @ sasha @ goltsman2010superconducting | Serial | 1028 | ||
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| Author | Zolotov, P.; Divochiy, A.; Korneeva, Yu.; Vakhtomin, Yu.; Seleznev, V.; Smirnov, K. | ||||
| Title | Capability investigation of superconducting single-photon detectors, optimized for 800–1200 nm spectrum range | Type | Miscellaneous | ||
| Year | 2015 | Publication |
3th ICQT | Abbreviated Journal | 3th ICQT |
| Volume | Issue | Pages | |||
| Keywords | SSPD, SNSPD | ||||
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| Address | Hotel Ukraina (Radisson), Moscow | ||||
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| Notes | Poster | Approved | no | ||
| Call Number | Serial | 1253 | |||
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| Author | Averkin, A. S.; Shishkin, A. G.; Chichkov, V. I.; Voronov, B. M.; Goltsman, G. N.; Karpov, A.; Ustinov, A. V. | ||||
| Title | Tunable frequency-selective surface based on superconducting split-ring resonators | Type | Conference Article | ||
| Year | 2014 | Publication |
8th Metamaterials | Abbreviated Journal | 8th Metamaterials |
| Volume | Issue | Pages | |||
| Keywords | superconducting split-ring resonators | ||||
| Abstract | We study a possibility to use the 2D superconducting metamaterial as a tunable frequency-selective surface (FSS). The proposed FSS is made of sub-wavelength size (l/14) metamaterial unit cells, where a split-ring resonator is embedded in a small iris aperture in a metal plane. The split-ring resonator is made of NbN film, and its resonance frequency is tuned by the temperature of the sample, changing the kinetic inductance of NbN film. The Ansoft HFSS simulation predicts the FSS tuning range of about 10-20 %. The developed superconducting FSS may be used as a tunable band-pass filter or modulator. | ||||
| Address | Copenhagen, Denmark | ||||
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| Area | Expedition | Conference | 8th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics – Metamaterials | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1749 | |||
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| Author | Okunev, O.; Smirnov, K.; Chulkova, G.; Korneev, A.; Lipatov, A.; Gol'tsman, G.; Zhang, J.; Slysz, W.; Verevkin, A.; Sobolewski, Roman | ||||
| Title | Ultrafast NBN hot-electron single-photon detectors for electronic applications | Type | Abstract | ||
| Year | 2002 | Publication |
Abstracts 8-th IUMRS-ICEM | Abbreviated Journal | Abstracts 8-th IUMRS-ICEM |
| Volume | Issue | Pages | |||
| Keywords | NbN SSPD, SNSPD | ||||
| Abstract | We present a new, simple to manufacture, single-photon detector (SPD), which can work from ultraviolet to near-infrared wavelengths of optical radiation and combines high speed of operation, high quantum efficiency (QE), and very low dark counts. The devices are superconducting and operate at temperature below 5 K. The physics of operation of our SPD is based on formation of a photon-induced resistive hotspot and subsequent appearance of a transient resistive barrier across an ultrathin and submicron-wide superconductor. | ||||
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| Area | Expedition | Conference | 8th IUMRS International Conference on Electronic Materials | ||
| Notes | Approved | no | |||
| Call Number | Serial | 1532 | |||
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| Author | Iomdina, E. N.; Seliverstov, S.; Sianosyan, A.; Teplyakova, K.; Rusova, A.; Goltsman, G. | ||||
| Title | The prospects of using the radiation for the assessment of corneal and scleral hydration | Type | Abstract | ||
| Year | 2016 | Publication |
Acta Ophthalmol. | Abbreviated Journal | Acta Ophthalmol. |
| Volume | 94 | Issue | Pages | ||
| Keywords | BWO, avalanche transit‐time diode, medicine, biology | ||||
| Abstract | Purpose 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. THz systems creating images in reflected beams are likely to become ideal instruments of noninvasive testing of corneal and scleral hydration degree as THz radiation is highly sensitive to water content. The paper aims at studying the transmittance and reflectance spectra of the cornea and the sclera of rabbit and human eyes, as well as those of the whole rabbit eye, in the frequency range of 0.13–0.32 THz. Methods The experiments were carried out on 3 corneas and 3 rabbit scleras, 2 whole rabbit eyes, and 3 human healthy adult scleras using a specially developed THz system based on reliable and easy‐to‐use continuous wave sources: a backward‐wave oscillator and an avalanche transit‐time diode. Results The transmittance spectra of the cornea and the sclera and the dependence of the reflection coefficient of these tissues in THz range on water percentage content were determined. Comparison of the rabbit cornea hydrated from 73.2% to 76.3% concentration by mass demonstrated an approximately linear relationship between THz reflectivity and water concentration. The decrease of free water concentration by 1% leads to a drop of the reflectance coefficient by 13%. The parameters studied displayed noticeable differences between the sclera and the cornea of rabbits and between rabbit sclera and human sclera. Conclusions Preliminary results demonstrate that the proposed technique, based on continuous THz radiation, may be used to create a device for noninvasive testing of corneal and scleral hydration, which has good potential of wide‐scale practical application. The work was supported by the Russian Foundation of Basic Research (grant No.15‐29‐03843) |
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| ISSN | 1755375X | ISBN | Medium | ||
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| Notes | Approved | no | |||
| Call Number | Serial | 1333 | |||
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| Author | Il'in, K.; Siegel, M.; Semenov, A.; Engel, A.; Hübers, H.-W.; Hollmann, E.; Gol'tsman, G.; Voronov, B. | ||||
| Title | Thickness dependence of superconducting properties of ultrathin Nb and NbN films | Type | Conference Article | ||
| Year | 2004 | Publication |
AKF-Frühjahrstagung | Abbreviated Journal | |
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| Keywords | Nb, NbN films, has potential plagiarism | ||||
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| Address | Berlin-Adlershof | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 1503 | |||
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| Author | Bandurin, Denis; Svintsov, Dmitry; Gayduchenko, Igor; Xu, Shuigang; Principi, Alessandro; Moskotin, Maksim; Tretyakov, Ivan; Yagodkin, Denis; Zhukov, Sergey; Taniguchi, Takashi; Watanabe, Kenji; Grigorieva, Irina; Polini, Marco; Goltsman, Gregory; Geim, Andre; Fedorov, Georgy | ||||
| Title | Resonant terahertz photoresponse and superlattice plasmons in graphene field-effect transistors | Type | Abstract | ||
| Year | 2019 | Publication |
APS March Meeting | Abbreviated Journal | APS March Meeting |
| Volume | Issue | Pages | F14.015 | ||
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| Abstract | Plasmons, collective oscillations of electron systems, can couple light and electric current, and thus can be used to create compact photodetectors, radiation mixers, and spectrometers. Despite the effort, it has proven challenging to implement plasmonic devices operating at THz frequencies. The material capable to meet this challenge is graphene as it supports long-lived electrically-tunable plasmons. In this talk, we will demonstrate plasmon-assisted resonant detection of THz radiation by antenna-coupled graphene FETs that act as both rectifying elements and plasmonic Fabry-Perot cavities amplifying the photoresponse. We will show that by varying the plasmon velocity using gate voltage, our detectors can be tuned between multiple resonant modes, a functionality that we apply to measure plasmons' wavelength and lifetime in graphene as well as to probe collective modes in its moire minibands. Our approach offers a convenient tool for further plasmonic research that is often difficult under non-ambient conditions and promises a viable route for various THz applications. We acknowledge Leverhulme Trust, Russian Science Foundation Grants N18-72-00234 and 17-72-30036, Russian Foundation for Basic Research No. 18-57-06001 and 16-29-03402. | ||||
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| Notes | Approved | no | |||
| Call Number | Serial | 1290 | |||
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| Author | Beck, M.; Klammer, M.; Lang, S.; Leiderer, P.; Kabanov, V. V.; Gol’tsman, G. N.; Demsar, J. | ||||
| Title | Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy | Type | Miscellaneous | ||
| Year | 2011 | Publication |
arXiv | Abbreviated Journal | |
| Volume | Issue | Pages | |||
| Keywords | NbN thin film, energy gap dynamics | ||||
| Abstract | Using time-domain Terahertz spectroscopy we performed direct studies of the photoinduced suppression and recovery of the superconducting gap in a conventional BCS superconductor NbN. Both processes are found to be strongly temperature and excitation density dependent. The analysis of the data with the established phenomenological Rothwarf-Taylor model enabled us to determine the bare quasiparticle recombination rate, the Cooper pair-breaking rate and the electron-phonon coupling constant, \lambda = 1.1 +/- 0.1, which is in excellent agreement with theoretical estimates. | ||||
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| Notes | Duplicated as 641 | Approved | no | ||
| Call Number | Serial | 1388 | |||
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