| Records |
| Author |
Zolotov, P. I.; Divochiy, A. V.; Vakhtomin, Y. B.; Morozov, P. V.; Seleznev, V. A.; Smirnov, K. V. |
| Title |
Development of high-effective superconducting single-photon detectors aimed for mid-IR spectrum range |
Type |
Conference Article |
| Year |
2017 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
| Volume |
917 |
Issue |
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Pages |
062037 |
| Keywords |
NbN SSPD, SNSPD |
Abstract  |
We report on development of superconducting single-photon detectors (SSPD) with high intrinsic quantum efficiency in the wavelength range 1.31 – 3.3 μm. By optimization of the NbN film thickness and its compound, we managed to improve detection efficiency of the detectors in the range up to 3.3 μm. Optimized devices showed intrinsic quantum efficiencies as high as 10% at mid-IR range. |
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| ISSN |
1742-6588 |
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1233 |
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Korneeva, Y.; Sidorova, M.; Semenov, A.; Krasnosvobodtsev, S.; Mitsen, K.; Korneev, A.; Chulkova, G.; Goltsman, G. |
| Title |
Comparison of hot-spot formation in NbC and NbN single-photon detectors |
Type |
Journal Article |
| Year |
2016 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
| Volume |
26 |
Issue |
3 |
Pages |
1-4 |
| Keywords |
NbC, NbN SSPD, SNSPD |
| Abstract |
We report an experimental investigation of the hot-spot evolution in superconducting single-photon detectors made of disordered superconducting materials with different diffusivity and energy downconversion time values, i.e., 33-nm-thick NbN and 23-nm-thick NbC films. We have demonstrated that, in NbC film, only 405-nm photons produce sufficiently large hot spot to trigger a single-photon response. The dependence of detection efficiency on bias current for 405-nm photons in NbC is similar to that for 3400-nm photons in NbN. In NbC, large diffusivity and downconversion time result in 1-D critical current suppression profile compared with the usual 2-D profile in NbN. |
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| ISSN |
1051-8223 |
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no |
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Serial |
1348 |
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| Author |
Il'in, K. S.; Verevkin, A. A.; Gol'tsman, G. N.; Sobolewski, R. |
| Title |
Infrared hot-electron NbN superconducting photodetectors for imaging applications |
Type |
Journal Article |
| Year |
1999 |
Publication |
Supercond. Sci. Technol. |
Abbreviated Journal |
Supercond. Sci. Technol. |
| Volume |
12 |
Issue |
11 |
Pages |
755-758 |
| Keywords |
NbN SSPD, SNSPD |
| Abstract |
We report an effective quantum efficiency of 340, responsivity >200 A W-1 (>104 V W-1) and response time of 27±5 ps at temperatures close to the superconducting transition for NbN superconducting hot-electron photodetectors (HEPs) in the near-infrared and optical ranges. Our studies were performed on a few nm thick NbN films deposited on sapphire substrates and patterned into µm-size multibridge detector structures, incorporated into a coplanar transmission line. The time-resolved photoresponse was studied by means of subpicosecond electro-optic sampling with 100 fs wide laser pulses. The quantum efficiency and responsivity studies of our photodetectors were conducted using an amplitude-modulated infrared beam, fibre-optically coupled to the device. The observed picosecond response time and the very high efficiency and sensitivity of the NbN HEPs make them an excellent choice for infrared imaging photodetectors and input optical-to-electrical transducers for superconducting digital circuits. |
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0953-2048 |
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no |
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1562 |
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| Author |
Semenov, A. D.; Hübers, H.-W.; Gol’tsman, G. N.; Smirnov, K. |
| Title |
Superconducting quantum detector for astronomy and X-ray spectroscopy |
Type |
Conference Article |
| Year |
2002 |
Publication |
Proc. Int. Workshop on Supercond. Nano-Electronics Devices |
Abbreviated Journal |
Proc. Int. Workshop on Supercond. Nano-Electronics Devices |
| Volume |
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Issue |
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Pages |
201-210 |
| Keywords |
NbN SSPD, SNSPD, SQD, superconducting quantum detectors, X-ray spectroscopy |
| Abstract |
We propose the novel concept of ultra-sensitive energy-dispersive superconducting quantum detectors prospective for applications in astronomy and X-ray spectroscopy. Depending on the superconducting material and operation conditions, such detector may allow realizing background limited noise equivalent power 10−21 W Hz−1/2 in the terahertz range when exposed to 4-K background radiation or counting of 6-keV photon with almost 10—4 energy resolution. Planar layout and relatively simple technology favor integration of elementary detectors into a detector array. |
| Address |
Naples, Italy |
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Thesis |
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| Publisher |
Springer |
Place of Publication |
Boston, MA |
Editor |
Pekola, J.; Ruggiero, B.; Silvestrini, P. |
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ISBN |
978-1-4615-0737-6 |
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Conference |
International Workshop on Superconducting Nano-Electronics Devices, May 28-June 1, 2001 |
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no |
| Call Number |
semenov2002superconducting |
Serial |
1525 |
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Gol'tsman, G.; Korneev, A.; Minaeva, O.; Rubtsova, I.; Milostnaya, I.; Chulkova, G.; Voronov, B.; Smirnov, K.; Seleznev, V.; Słysz, W.; Kitaygorsky, J.; Cross, A.; Pearlman, A.; Sobolewski, Roman |
| Title |
Superconducting nanostructured detectors capable of single-photon counting in the THz range |
Type |
Conference Article |
| Year |
2005 |
Publication |
Proc. 16th Int. Symp. Space Terahertz Technol. |
Abbreviated Journal |
Proc. 16th Int. Symp. Space Terahertz Technol. |
| Volume |
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Issue |
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Pages |
555-557 |
| Keywords |
NbN SSPD, SNSPD |
| Abstract |
We present the results of the NbN superconducting single-photon detector sensitivity measurement in the visible to mid-IR range. For visible and near IR light (0.56 — 1.3μm wavelengths) the detector exhibits 30% quantum efficiency saturation value limited by the NbN film absorption and extremely low level of dark counts (2x10 -4 s -1). The detector manifested single-photon counting up to 6 μm wavelength with the quantum efficiency reaching 10 -2 % at 5.6 μm and 3 K temperature. |
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1476 |
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