Records |
Author |
Florya, I. N.; Korneeva, Y. P.; Sidorova, M. V.; Golikov, A. D.; Gaiduchenko, I. A.; Fedorov, G. E.; Korneev, A. A.; Voronov, B. M.; Goltsman, G. N.; Samartsev, V. V.; Vinogradov, E. A.; Naumov, A. V.; Karimullin, K. R. |
Title |
Energy relaxtation and hot spot formation in superconducting single photon detectors SSPDs |
Type |
Conference Article |
Year |
2015 |
Publication |
EPJ Web of Conferences |
Abbreviated Journal |
EPJ Web of Conferences |
Volume |
103 |
Issue |
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Pages |
10004 (1 to 2) |
Keywords |
SSPD, SNSPD |
Abstract |
We have studied the mechanism of energy relaxation and resistive state formation after absorption of a single photon for different wavelengths and materials of single photon detectors. Our results are in good agreement with the hot spot model. |
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2100-014X |
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1351 |
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Baeva, E. M.; Sidorova, M. V.; Korneev, A. A.; Smirnov, K. V.; Divochy, A. V.; Morozov, P. V.; Zolotov, P. I.; Vakhtomin, Y. B.; Semenov, A. V.; Klapwijk, T. M.; Khrapai, V. S.; Goltsman, G. N. |
Title |
Thermal properties of NbN single-photon detectors |
Type |
Journal Article |
Year |
2018 |
Publication |
Phys. Rev. Applied |
Abbreviated Journal |
Phys. Rev. Applied |
Volume |
10 |
Issue |
6 |
Pages |
064063 (1 to 8) |
Keywords |
NbN SSPD, SNSPD |
Abstract |
We investigate thermal properties of a NbN single-photon detector capable of unit internal detection efficiency. Using an independent calibration of the coupling losses, we determine the absolute optical power absorbed by the NbN film and, via resistive superconductor thermometry, the temperature dependence of the thermal resistance Z(T) of the NbN film. In principle, this approach permits simultaneous measurement of the electron-phonon and phonon-escape contributions to the energy relaxation, which in our case is ambiguous because of the similar temperature dependencies. We analyze Z(T) with a two-temperature model and impose an upper bound on the ratio of electron and phonon heat capacities in NbN, which is surprisingly close to a recent theoretical lower bound for the same quantity in similar devices. |
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2331-7019 |
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no |
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1226 |
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Author |
Simonov, N. O.; Korneeva, Y. P.; Korneev, A. A.; Goltsman, G. N. |
Title |
Enhance of the superconducting properties of the NbN/Au bilayer bridges |
Type |
Conference Article |
Year |
2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1695 |
Issue |
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Pages |
012132 (1 to 4) |
Keywords |
SSPD, SNSPD |
Abstract |
We experimentally demonstrate strong temperature dependence of the critical current of the superconducting 600-nm-wide and 5-μm-long bridge made of NbN/Au bilayer. The result is achieved due to the proximity effect realized between the highly disordered superconducting NbN layer and low resistive normal-metal Au layer. |
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1742-6588 |
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1263 |
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Author |
Manova, N. N.; Smirnov, E. O.; Korneeva, Yu. P.; Korneev, A. A.; Goltsman, G. N. |
Title |
Superconducting photon counter for nanophotonics applications |
Type |
Conference Article |
Year |
2019 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1410 |
Issue |
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Pages |
012147 (1 to 5) |
Keywords |
SSPD, SNSPD |
Abstract |
We develop large area superconducting single-photon detector SSPD with a micron-wide strip suitable for free-space coupling or packaging with multi-mode optical fibres. The detector sensitive area is 20 μm in diameter. In near infrared (1330 nm wavelength) our SSPD exhibits above 30% detection efficiency with low dark counts and 45 ps timing jitter. |
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1742-6588 |
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1271 |
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Author |
Polyakova, M. I.; Florya, I. N.; Semenov, A. V.; Korneev, A. A.; Goltsman, G. N. |
Title |
Extracting hot-spot correlation length from SNSPD tomography data |
Type |
Conference Article |
Year |
2019 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1410 |
Issue |
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Pages |
012166 (1 to 4) |
Keywords |
SSPD, SNSPD, quantum detector tomography, QDT |
Abstract |
We present data of quantum detector tomography for the samples specifically optimized for this problem. Using this method, we take results of hot-spot correlation length of 17 ± 2 nm. |
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1742-6588 |
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1273 |
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Sidorova, M. V.; Kozorezov, A. G.; Semenov, A. V.; Korneeva, Y. P.; Mikhailov, M. Y.; Devizenko, A. Y.; Korneev, A. A.; Chulkova, G. M.; Goltsman, G. N. |
Title |
Nonbolometric bottleneck in electron-phonon relaxation in ultrathin WSi films |
Type |
Journal Article |
Year |
2018 |
Publication |
Phys. Rev. B |
Abbreviated Journal |
Phys. Rev. B |
Volume |
97 |
Issue |
18 |
Pages |
184512 (1 to 13) |
Keywords |
WSi films, diffusion constant, SSPD, SNSPD |
Abstract |
We developed the model of the internal phonon bottleneck to describe the energy exchange between the acoustically soft ultrathin metal film and acoustically rigid substrate. Discriminating phonons in the film into two groups, escaping and nonescaping, we show that electrons and nonescaping phonons may form a unified subsystem, which is cooled down only due to interactions with escaping phonons, either due to direct phonon conversion or indirect sequential interaction with an electronic system. Using an amplitude-modulated absorption of the sub-THz radiation technique, we studied electron-phonon relaxation in ultrathin disordered films of tungsten silicide. We found an experimental proof of the internal phonon bottleneck. The experiment and simulation based on the proposed model agree well, resulting in τe−ph∼140–190 ps at TC=3.4K, supporting the results of earlier measurements by independent techniques. |
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2469-9950 |
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no |
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1305 |
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Author |
Florya, I. N.; Korneeva, Y. P.; Mikhailov, M. Y.; Devizenko, A. Y.; Korneev, A. A.; Goltsman, G. N. |
Title |
Photon counting statistics of superconducting single-photon detectors made of a three-layer WSi film |
Type |
Journal Article |
Year |
2018 |
Publication |
Low Temp. Phys. |
Abbreviated Journal |
Low Temp. Phys. |
Volume |
44 |
Issue |
3 |
Pages |
221-225 |
Keywords |
WSi SSPD, SNSPD |
Abstract |
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 limiting its broadband response is to make a detector in the form of several vertically stacked layers and connect them in parallel. For the first time we have studied single-photon detection in a multilayer structure consisting of three superconducting layers of amorphous tungsten silicide (WSi) separated by thin layers of amorphous silicon. Two operating modes of the detector are illustrated: an avalanche regime and an arm-trigger regime. A shift in these modes occurs at currents of ∼0.5–0.6 times the critical current of the detector.
This work was supported by technical task No. 88 for scientific research at the National Research University “Higher School of Economics,” Grant No. 14.V25.31.0007 from the Ministry of Education and Science of Russia, and the work of G. N. Goltsman was supported by task No. 3.7328.2017/VU of the Ministry of Education and Science of Russia. |
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1063-777X |
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no |
Call Number |
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1310 |
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Author |
Vodolazov, D. Y.; Korneeva, Y. P.; Semenov, A. V.; Korneev, A. A.; Goltsman, G. N. |
Title |
Vortex-assisted mechanism of photon counting in a superconducting nanowire single-photon detector revealed by external magnetic field |
Type |
Journal Article |
Year |
2015 |
Publication |
Phys. Rev. B |
Abbreviated Journal |
Phys. Rev. B |
Volume |
92 |
Issue |
10 |
Pages |
104503 (1 to 9) |
Keywords |
SSPD, SNSPD |
Abstract |
We use an external magnetic field to probe the detection mechanism of a superconducting nanowire single-photon detector. We argue that the hot belt model (which assumes partial suppression of the superconducting order parameter Δ across the whole width of the superconducting nanowire after absorption of the photon) does not explain observed weak-field dependence of the photon count rate (PCR) for photons with λ=450nm and noticeable decrease of PCR (with increasing the magnetic field) in a range of the currents for photons with wavelengths λ=450–1200nm. Found experimental results for all studied wavelengths can be explained by the vortex hot spot model (which assumes partial suppression of Δ in the area with size smaller than the width of the nanowire) if one takes into account nucleation and entrance of the vortices to the photon induced hot spot and their pinning by the hot spot with relatively large size and strongly suppressed Δ. |
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1098-0121 |
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no |
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1343 |
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Peltonen, J. T.; Astafiev, O. V.; Korneeva, Y. P.; Voronov, B. M.; Korneev, A. A.; Charaev, I. M.; Semenov, A. V.; Golt'sman, G. N.; Ioffe, L. B.; Klapwijk, T. M.; Tsai, J. S. |
Title |
Coherent flux tunneling through NbN nanowires |
Type |
Journal Article |
Year |
2013 |
Publication |
Phys. Rev. B |
Abbreviated Journal |
Phys. Rev. B |
Volume |
88 |
Issue |
22 |
Pages |
220506 (1 to 5) |
Keywords |
NbN nanowires |
Abstract |
We demonstrate evidence of coherent magnetic flux tunneling through superconducting nanowires patterned in a thin highly disordered NbN film. The phenomenon is revealed as a superposition of flux states in a fully metallic superconducting loop with the nanowire acting as an effective tunnel barrier for the magnetic flux, and reproducibly observed in different wires. The flux superposition achieved in the fully metallic NbN rings proves the universality of the phenomenon previously reported for InOx. We perform microwave spectroscopy and study the tunneling amplitude as a function of the wire width, compare the experimental results with theories, and estimate the parameters for existing theoretical models. |
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1098-0121 |
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no |
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1369 |
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Smirnov, K. V.; Vachtomin, Y. B.; Ozhegov, R. V.; Pentin, I. V.; Slivinskaya, E. V.; Korneev, A. A.; Goltsman, G. N. |
Title |
Fiber coupled single photon receivers based on superconducting detectors for quantum communications and quantum cryptography |
Type |
Conference Article |
Year |
2008 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
Volume |
7138 |
Issue |
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Pages |
713827 (1 to 6) |
Keywords |
SSPD, SNSPD, superconducting single photon detector, ultra-thin superconducting films, optical fiber coupling, ready to use receiver |
Abstract |
At present superconducting detectors become increasingly attractive for various practical applications. In this paper we present results on the depelopment of fiber coupled receiver systems for the registration of IR single photons, optimized for telecommunication and quantum-cryptography. These receiver systems were developed on the basis of superconducting single photon detectors (SSPD) of VIS and IR wavelength ranges. The core of the SSPD is a narrow ( 100 nm) and long ( 0,5 mm) strip in the form of a meander which is patterned from a 4-nm-thick NbN film (TC=10-11 K, jC= 5-7•106 A/cm2); the sensitive area dimensions are 10×10 μm2. The main problem to be solved while the receiver system development was optical coupling of a single-mode fiber (9 microns in diameter) with the SSPD sensitive area. Characteristics of the developed system at the optical input are as follows: quantum efficiency >10 % (at 1.3 μm), >4 % (at 1.55 μm); dark counts rate ≤1 s-1; duration of voltage pulse ≤5 ns; jitter ≤40 ps. The receiver systems have either one or two identical channels (for the case of carrying out correlation measurements) and are made as an insert in a helium storage Dewar. |
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Spie |
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Tománek, P.; Senderáková, D.; Hrabovský, M. |
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1405 |
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Korneev, A. A. |
Title |
Superconducting NbN microstrip single-photon detectors |
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Abstract |
Year |
2021 |
Publication |
Proc. Quantum Optics and Photon Counting |
Abbreviated Journal |
Proc. Quantum Optics and Photon Counting |
Volume |
11771 |
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Pages |
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Keywords |
NbN SSPD, SNSPD |
Abstract |
Superconducting Single-Photon Detectors (SSPD) invented two decades ago have evolved to a mature technology and have become devices of choice in the advanced applications of quantum optics, such as quantum cryptography and optical quantum computing. In these applications SSPDs are coupled to single-mode fibers and feature almost unity detection efficiency, negligible dark counts, picosecond timing jitter and MHz photon count rate. Meanwhile, there are great many applications requiring coupling to multi-mode fibers or free space. ‘Classical’ SSPDs with 100-nm-wide superconducting strip and covering area of about 100 µm2 are not suitable for further scaling due to degradation of performance and low fabrication yield. Recently we have demonstrated single-photon counting in micron-wide superconducting bridges and strips. Here we present our approach to the realization of practical photon-counting detectors of large enough area to be efficiently coupled to multi-mode fibers or free space. The detector is either a meander or a spiral of 1-µm-wide strip covering an area of 50x50 µm2. Being operated at 1.7K temperature it demonstrates the saturated detection efficiency (i.e. limited by the absorption in the detector) up to 1550 nm wavelength, about 10 ns dead time and timing jitter in range 50-100 ps. |
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SPIE |
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Prochazka, I.; Štefaňák, M.; Sobolewski, R.; Gábris, A. |
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Quantum Optics and Photon Counting; SPIE Optics + Optoelectronics, 2021, Online Only |
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1784 |
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Manova, N. N.; Simonov, N. O.; Korneeva, Y. P.; Korneev, A. A. |
Title |
Developing of NbN films for superconducting microstrip single-photon detector |
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Conference Article |
Year |
2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1695 |
Issue |
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Pages |
012116 (1 to 5) |
Keywords |
NbN SSPD, SNSPD, NbN films |
Abstract |
We optimized NbN films on a Si substrate with a buffer SiO2 layer to produce superconducting microstrip single-photon detectors with saturated dependence of quantum efficiency (QE) versus normalized bias current. We varied thickness of films and observed the maximum QE saturation for device based on the thinner film with the lowest ratio RS300/RS20. |
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1742-6588 |
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1786 |
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Polyakova, M. I.; Korneev, A. A.; Semenov, A. V. |
Title |
Comparison single- and double- spot detection efficiencies of SSPD based to MoSi and NbN films |
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Conference Article |
Year |
2020 |
Publication |
J. Phys.: Conf. Ser. |
Abbreviated Journal |
J. Phys.: Conf. Ser. |
Volume |
1695 |
Issue |
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Pages |
012146 (1 to 3) |
Keywords |
NbN SSPD, SNSPD, MoSi |
Abstract |
In this work, we present results of quantum detector tomography of superconducting single photon detector (SSPD) based on MoSi film, and compare them with previously reported data on NbN. We find that for both materials hot spot interaction length coincides with the strip width, and the dependence of single and double-spot detection efficiencies on bias current are compatible with sufficiently large hot-spot size, approaching the strip width. |
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1742-6588 |
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1787 |
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Vodolazov, D. Y.; Manova, N. N.; Korneeva, Y. P.; Korneev, A. A. |
Title |
Timing jitter in NbN superconducting microstrip single-photon detector |
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Journal Article |
Year |
2020 |
Publication |
Phys. Rev. Applied |
Abbreviated Journal |
Phys. Rev. Applied |
Volume |
14 |
Issue |
4 |
Pages |
044041 (1 to 8) |
Keywords |
NbN SSPD, SNSPD |
Abstract |
We experimentally study timing jitter of single-photon detection by NbN superconducting strips with width w ranging from 190 nm to 3μm. We find that timing jitter of both narrow (190 nm) and micron-wide strips is about 40 ps at currents where internal detection efficiency η saturates and it is close to our instrumental jitter. We also calculate intrinsic timing jitter in wide strips using the modified time-dependent Ginzburg-Landau equation coupled with a two-temperature model. We find that with increasing width the intrinsic timing jitter increases and the effect is most considerable at currents where a rapid growth of η changes to saturation. We relate it with complicated vortex and antivortex dynamics, which depends on a photon’s absorption site across the strip and its width. The model also predicts that at current close to depairing current the intrinsic timing jitter of a wide strip could be about ℏ/kBTc (Tc is a critical temperature of superconductor), i.e., the same as for a narrow strip. |
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1788 |
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Shein, K. V.; Zarudneva, A. A.; Emel’yanova, V. O.; Logunova, M. A.; Chichkov, V. I.; Sobolev, A.S.; Zav’yalov, V. V.; Lehtinen, J. S.; Smirnov, E. O.; Korneeva, Y. P.; Korneev, A. A.; Arutyunov, K. Y. |
Title |
Superconducting microstructures with high impedance |
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Journal Article |
Year |
2020 |
Publication |
Phys. Solid State |
Abbreviated Journal |
Phys. Solid State |
Volume |
62 |
Issue |
9 |
Pages |
1539-1542 |
Keywords |
superconducting channels, SIS, inetic inductance, tunneling contacts, high impedance |
Abstract |
The transport properties of two types of quasi-one-dimensional superconducting microstructures were investigated at ultra-low temperatures: the narrow channels close-packed in the shape of meander, and the chains of tunneling contacts “superconductor-insulator-superconductor.” Both types of the microstructures demonstrated high value of high-frequency impedance and-or the dynamic resistance. The study opens up potential for using of such structures as current stabilizing elements with zero dissipation. |
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Original Title |
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Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1063-7834 |
ISBN |
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Medium |
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Area |
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Expedition |
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Conference |
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Notes |
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Approved |
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Call Number |
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Serial |
1789 |
Permanent link to this record |