Records |
Author |
Korneeva, Y.; Florya, I.; Vdovichev, S.; Moshkova, M.; Simonov, N.; Kaurova, N.; Korneev, A.; Goltsman, G. |
Title |
Comparison of hot spot formation in nbn and mon thin superconducting films after photon absorption |
Type |
Journal Article |
Year |
2017 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
Volume |
27 |
Issue |
4 |
Pages |
1-4 |
Keywords |
MoNx SSPD |
Abstract |
In superconducting single-photon detectors (SSPD), the efficiency of local suppression of superconductivity and hotspot formation is controlled by diffusivity and electron-phonon interaction time. Here, we selected a material, 3.6-nm-thick MoNx film, which features diffusivity close to those of NbN traditionally used for SSPD fabrication, but with electron-phonon interaction time an order of magnitude larger. In MoN ∞ detectors, we study the dependence of detection efficiency on bias current, photon energy, and strip width, and compare it with NbN SSPD. We observe nonlinear current-energy dependence in MoNx SSPD and more pronounced plateaus in dependences of detection efficiency on bias current, which we attribute to longer electron-phonon interaction time. |
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ISSN |
1051-8223 |
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no |
Call Number |
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Serial |
1325 |
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Author |
Moshkova, M. A.; Divochiy, A. V.; Morozov, P. V.; Antipov, A. V.; Vakhtomin, Yu. B.; Smirnov, K. V. |
Title |
Characterization of topologies of superconducting photon number resolving detectors |
Type |
Conference Article |
Year |
2019 |
Publication |
Proc. 8th Int. Conf. Photonics and Information Optics |
Abbreviated Journal |
Proc. 8th Int. Conf. Photonics and Information Optics |
Volume |
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Issue |
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Pages |
465-466 |
Keywords |
PNR SSPD |
Abstract |
Comparative analysis for different topologies of superconducting single-photon detectors with ability to resolve up to 4 photons in a short pulse of IR radiation has been carry out. It was developed the detector with a system detection efficiency of ~ 85 % at λ = 1550 nm. The possibility of using such detector to restore photon statistics of a pulsed radiation source was demonstrated. |
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Language |
Russian |
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ISBN |
978-5-7262-2536-4 |
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Notes |
http://fioconf.mephi.ru/files/2018/12/FIO2019-Sbornik.pdf |
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no |
Call Number |
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Serial |
1803 |
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Author |
Moshkova, M. A.; Morozov, P. V.; Antipov, A. V.; Vakhtomin, Y. B.; Smirnov, K. V. |
Title |
High-efficiency multi-element superconducting single-photon detector |
Type |
Conference Article |
Year |
2021 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
Volume |
11771 |
Issue |
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Pages |
2-8 |
Keywords |
PNR SSPD, large active area, detection efficiency |
Abstract |
We present the result of the creation and investigation of the multi-element superconducting single photon detectors, which can recognize the number of photons (up to six) in a short pulse of the radiation at telecommunication wavelengths range. The best receivers coupled with single-mode fiber have the system quantum efficiency of ⁓85%. The receivers have a 100 ps time resolution and a few nanoseconds dead time that allows them to operate at megahertz counting rate. Implementation of the multi-element architecture for creation of the superconducting single photon detectors with increased sensitive area allows to create the high efficiency receivers coupled with multi-mode fibers and with preserving of the all advantages of superconducting photon counters. |
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Publisher |
SPIE |
Place of Publication |
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Editor |
Prochazka, I.; Štefaňák, M.; Sobolewski, R.; Gábris, A. |
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Quantum Optics and Photon Counting |
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Serial |
1795 |
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Author |
Moshkova, M.; Divochiy, A.; Morozov, P.; Vakhtomin, Y.; Antipov, A.; Zolotov, P.; Seleznev, V.; Ahmetov, M.; Smirnov, K. |
Title |
High-performance superconducting photon-number-resolving detectors with 86% system efficiency at telecom range |
Type |
Journal Article |
Year |
2019 |
Publication |
J. Opt. Soc. Am. B |
Abbreviated Journal |
J. Opt. Soc. Am. B |
Volume |
36 |
Issue |
3 |
Pages |
B20 |
Keywords |
NbN PNR SSPD, SNSPD |
Abstract |
The use of improved fabrication technology, highly disordered NbN thin films, and intertwined section topology makes it possible to create high-performance photon-number-resolving superconducting single-photon detectors (PNR SSPDs) that are comparable to conventional single-element SSPDs at the telecom range. The developed four-section PNR SSPD has simultaneously an 86±3% system detection efficiency, 35 cps dark count rate, ∼2 ns dead time, and maximum 90 ps jitter. An investigation of the PNR SSPD’s detection efficiency for multiphoton events shows good uniformity across sections. As a result, such a PNR SSPD is a good candidate for retrieving the photon statistics for light sources and quantum key distribution systems. |
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ISSN |
0740-3224 |
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no |
Call Number |
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Serial |
1225 |
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Author |
Moshkova, M.; Morozov, P.; Divochiy, A.; Vakhtomin, Y.; Smirnov, K. |
Title |
Large active area superconducting single photon detector |
Type |
Conference Article |
Year |
2019 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1410 |
Issue |
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Pages |
012139 |
Keywords |
SSPD, SNSPD |
Abstract |
We present development of large active area superconducting single-photon detectors well coupled with standard 50 μm-core multi-mode fiber. The sensitive area of the SSPD is patterned using the photon-number-resolving design and occupies an area of 40×40 μm2. Using this approach, we have obtained excellent specifications: system detection efficiency of 47% measured using a 900 nm laser and low dark count rate of 100 cps. The main advantages of the approach presented are a very short dead time of the detector of 22 ns and FWHM jitter value of about 130 ps. |
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Edition |
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ISSN |
1742-6588 |
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no |
Call Number |
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Serial |
1224 |
Permanent link to this record |