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Belosevich, V. V.; Gayduchenko, I. A.; Titova, N. A.; Zhukova, E. S.; Goltsman, G. N.; Fedorov, G. E.; Silaev, A. A. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Response of carbon nanotube film transistor to the THz radiation |
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Conference Article |
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Year |
2018 |
Publication ![sorted by Publication field, ascending order (up)](img/sort_asc.gif) |
EPJ Web Conf. |
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EPJ Web Conf. |
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195 |
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05012 (1 to 2) |
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field-effect transistor, FET, carbon nanotube, CNT |
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2100-014X |
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1317 |
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Fedorov, G. E.; Gaiduchenko, I. A.; Golikov, A. D.; Rybin, M. G.; Obraztsova, E. D.; Voronov, B. M.; Coquillat, D.; Diakonova, N.; Knap, W.; Goltsman, G. N.; Samartsev, V. V.; Vinogradov, E. A.; Naumov, A. V.; Karimullin, K. R. |
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Title |
Response of graphene based gated nanodevices exposed to THz radiation |
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Conference Article |
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Year |
2015 |
Publication ![sorted by Publication field, ascending order (up)](img/sort_asc.gif) |
EPJ Web of Conferences |
Abbreviated Journal |
EPJ Web of Conferences |
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Volume |
103 |
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10003 (1 to 2) |
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Keywords |
graphene field-effect transistor, FET |
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In this work we report on the response of asymmetric graphene based devices to subterahertz and terahertz radiation. Our devices are made in a configuration of a field-effect transistor with conduction channel between the source and drain electrodes formed with a CVD-grown graphene. The radiation is coupled through a spiral antenna to source and top gate electrodes. Room temperature responsivity of our devices is close to the values that are attractive for commercial applications. Further optimization of the device configuration may result in appearance of novel terahertz radiation detectors. |
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2100-014X |
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1350 |
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Larrey, V.; Villegier, J. -C.; Salez, M.; Miletto-Granozio, F.; Karpov, A. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Processing and characterization of high Jc NbN superconducting tunnel junctions for THz analog circuits and RSFQ |
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Journal Article |
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Year |
1999 |
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IEEE Trans. Appl. Supercond. |
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9 |
Issue |
2 |
Pages |
3216-3219 |
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Keywords |
RSFQ, NbN, SIS |
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A generic NbN Superconducting Tunnel Junctions (STJ) technology has been developed using conventional substrates (Si and SOI-SIMOX) for making THz spectrometers including SIS receivers and RSFQ logic gates. NbN/MgO/NbN junctions with area of 1 /spl mu/m/sup 2/, Jc of 10 kA/cm/sup 2/ and low sub-gap leakage current (Vm>25 mV) are currently obtained from room temperature sputtered multilayers followed by a post-annealing at 250/spl deg/C. Using a thin MgO buffer layer deposited underneath the NbN electrodes, ensures lower NbN surface resistance values (Rs=7 /spl mu//spl Omega/) at 10 GHz and 4 K. Epitaxial NbN [100] films on MgO [100] with high gap frequency (1.4 THz) have also been achieved under the same deposition conditions at room temperature. The NbN SIS has shown good I-V photon induced steps when LO pumped at 300 GHz. We have developed an 8 levels Al/NbN multilayer process for making 1.5 THz SIS mixers (including Al antennas) on Si membranes patterned in SOI-SIMOX. Using the planarization techniques developed at the Si-MOS CEA-LETI Facility, we have also demonstrated on the possibility of extending our NbN technology to high level RSFQ circuit integration with 0.5 /spl mu/m/sup 2/ junction area, made on large area substrates (up to 8 inches). |
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1081 |
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Samsonova, Alena; Zolotov, Philipp; Baeva, Elmira; Lomakin, Andrey; Titova, Nadezhda; Kardakova, Anna; Goltsman, Gregory |
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Title |
Signatures of surface magnetic disorder in thin niobium films |
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Journal Article |
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Year |
2021 |
Publication ![sorted by Publication field, ascending order (up)](img/sort_asc.gif) |
IEEE Trans. Appl. Supercond. |
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1-1 |
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Temperature measurement, Temperature dependence, Superconducting magnets, Superconducting transition temperature, Substrates, Resistance, Scattering |
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We present our studies on the evolution of the normal and superconducting properties with thickness of thin Nb films with a low level of non-magnetic disorder (kFl 150 for the thickest film in the set). The analysis of the superconducting behavior points to the presence of magnetic moments, hidden in the native oxide on the surface of Nb films. Using the Abrikosov-Gorkov theory, we obtain the density of surface magnetic moments of 1013 cm-2, which is in agreement with the previously reported data for Nb films. |
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1051-8223 |
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1162 |
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Author |
Ozhegov, R. V.; Okunev, O. V.; Gol’tsman, G. N.; Filippenko, L. V.; Koshelets, V. P. |
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Title |
Noise equivalent temperature difference of a superconducting integrated terahertz receiver |
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Journal Article |
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Year |
2009 |
Publication ![sorted by Publication field, ascending order (up)](img/sort_asc.gif) |
J. Commun. Technol. Electron. |
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J. Commun. Technol. Electron. |
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Volume |
54 |
Issue |
6 |
Pages |
716-720 |
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Keywords |
SIS mixer SIR NETD, FFO, harmonic mixer |
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The dependence of the noise equivalent temperature difference (NETD) of a superconducting integrated receiver (SIR) on the receiver noise temperature and the inputsignal level has been investigated. An unprecedented NETD of 13±2 mK has been measured at a SIR noise temperature of 200 K, intermediate-frequency bandwidth of 4 GHz, and time constant of 1 s. With a decrease in the input signal, an improvement in the NETD is observed. This effect is explained by a reduction in the influence of the instabilities of the receiver power supply and the amplification circuit that occur when the input signal is decreased. |
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1064-2269 |
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1400 |
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