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Author |
Minaeva, O.; Fraine, A.; Korneev, A.; Divochiy, A.; Goltsman, G.; Sergienko, A. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
High resolution optical time-domain reflectometry using superconducting single-photon detectors |
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Conference Article |
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Year ![sorted by Year field, descending order (down)](img/sort_desc.gif) |
2012 |
Publication |
Frontiers in Opt. 2012/Laser Sci. XXVIII |
Abbreviated Journal |
Frontiers in Opt. 2012/Laser Sci. XXVIII |
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Fw3a.39 |
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Keywords |
SSPD, SNSPD, Photodetectors; Fiber characterization; Light beams; Optical time domain reflectometry; Photon counting; Single mode fibers; Single photon detectors; Superconductors |
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We discuss the advantages and limitations of single-photon optical time-domain reflectometry with superconducting single-photon detectors. The higher two-point resolution can be achieved due to superior timing performance of SSPDs in comparison with InGaAs APDs. |
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Optical Society of America |
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no |
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1237 |
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Author |
Sclafani, M.; Marksteiner, M.; Keir, F. M. L.; Divochiy, A.; Korneev, A.; Semenov, A.; Gol'tsman, G.; Arndt, M. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Sensitivity of a superconducting nanowire detector for single ions at low energy |
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Journal Article |
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2012 |
Publication |
Nanotechnol. |
Abbreviated Journal |
Nanotechnol. |
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Volume |
23 |
Issue |
6 |
Pages |
065501 (1 to 5) |
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Keywords |
NbN SSPD, SNSPD, superconducting single ion detector, SSID, SNSID |
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Abstract |
We report on the characterization of a superconducting nanowire detector for ions at low kinetic energies. We measure the absolute single-particle detection efficiency eta and trace its increase with energy up to eta = 100%. We discuss the influence of noble gas adsorbates on the cryogenic surface and analyze their relevance for the detection of slow massive particles. We apply a recent model for the hot-spot formation to the incidence of atomic ions at energies between 0.2 and 1 keV. We suggest how the differences observed for photons and atoms or molecules can be related to the surface condition of the detector and we propose that the restoration of proper surface conditions may open a new avenue for SSPD-based optical spectroscopy on molecules and nanoparticles. |
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Vienna Center for Quantum Science and Technology, Faculty of Physics, University of Vienna, Vienna, Austria |
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English |
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0957-4484 |
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PMID:22248823 |
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no |
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1380 |
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Author |
Semenov, A. V.; Devyatov, I. A.; Korneev, A. A.; Smirnov, K. V.; Goltsman, G. N.; Melnikov, A. P. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
Derivation of expression for thermodynamic potential of “dirty” superconductor |
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Journal Article |
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2012 |
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Rus. J. Radio Electron. |
Abbreviated Journal |
Rus. J. Radio Electron. |
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4 |
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dirty superconductor, Usadel theory, thermodynamic potential |
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We derive a formula for thermodynamic potential of dirty superconductor which express it via isotropic quasiclassical Green functions of Usadel theory. Our result allows unify description of dynamic processes and fluctuations in superconducting nano-electronic devices. |
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Russian |
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7 pages |
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no |
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1824 |
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Korneeva, Y.; Florya, I.; Semenov, A.; Korneev, A.; Goltsman, G. |
![find record details (via OpenURL) openurl](img/xref.gif)
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Title |
New generation of nanowire NbN superconducting single-photon detector for mid-infrared |
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Journal Article |
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2011 |
Publication |
IEEE Trans. Appl. Supercond. |
Abbreviated Journal |
IEEE Trans. Appl. Supercond. |
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Volume |
21 |
Issue |
3 |
Pages |
323-326 |
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Keywords |
SSPD |
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We present a break-through approach to mid-infrared single-photon detection based on nanowire NbN superconducting single-photon detectors (SSPD). Although SSPD became a mature technology for telecom wavelengths (1.3-1.55 μm) its further expansion to mid-infrared wavelength was hampered by low sensitivity above 2 μm. We managed to overcome this limit by reducing the nanowire width to 50 nm, while retaining high superconducting properties and connecting the wires in parallel to produce a voltage response of sufficient magnitude. The new device exhibits 10 times better quantum efficiency at 3.5 μm wavelength than the “standard” SSPD. |
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no |
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RPLAB @ gujma @ |
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644 |
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Author |
Korneev, Alexander; Korneeva, Yulia; Florya, Irina; Elezov, Michael; Manova, Nadezhda; Tarkhov, Michael; An, Pavel; Kardakova, Anna; Isupova, Anastasiya; Chulkova, Galina; Voronov, Boris |
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Title |
Recent advances in superconducting NbN single-photon detector development |
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Conference Article |
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2011 |
Publication |
Proc. SPIE |
Abbreviated Journal |
Proc. SPIE |
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Volume |
8072 |
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Pages |
807202 (1 to 10) |
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Keywords |
SSPD |
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Superconducting single-photon detector (SSPD) is a planar nanostructure patterned from 4-nm-thick NbN film deposited on sapphire substrate. The sensitive element of the SSPD is 100-nm-wide NbN strip. The device is operated at liquid helium temperature. Absorption of a photon leads to a local suppression of superconductivity producing subnanosecond-long voltage pulse. In infrared (at 1550 nm and longer wavelengths) SSPD outperforms avalanche photodiodes in terms of detection efficiency (DE), dark counts rate, maximum counting rate and timing jitter. Efficient single-mode fibre coupling of the SSPD enabled its usage in many applications ranging from single-photon sources research to quantum cryptography. Recently we managed to improve the SSPD performance and measured 25% detection efficiency at 1550 nm wavelength and dark counts rate of 10 s-1. We also improved photon-number resolving SSPD (PNR-SSPD) which realizes a spatial multiplexing of incident photons enabling resolving of up to 4 simultaneously absorbed photons. Another improvement is the increase of the photon absorption using a λ/4 microcavity integrated with the SSPD. And finally in our strive to increase the DE at longer wavelengths we fabricated SSPD with the strip almost twice narrower compared to the standard 100 nm and demonstrated that in middle infrared (about 3 μm wavelength) these devices have DE several times higher compared to the traditional SSPDs. |
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RPLAB @ gujma @ |
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663 |
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Author |
Manova, N. N.; Korneeva, Yu. P.; Korneev, A. A.; Slysz, W.; Voronov, B. M.; Gol'tsman, G. N. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Superconducting NbN single-photon detector integrated with quarter-wave resonator |
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Journal Article |
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2011 |
Publication |
Tech. Phys. Lett. |
Abbreviated Journal |
Tech. Phys. Lett. |
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Volume |
37 |
Issue |
5 |
Pages |
469-471 |
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Keywords |
SSPD, SNSPD |
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The spectral dependence of the quantum efficiency of superconducting NbN single-photon detectors integrated with quarter-wave resonators based on Si3N4, SiO2, and SiO layers has been studied. |
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no |
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RPLAB @ gujma @ |
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664 |
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Author |
Korneev, A.; Korneeva, Y.; Florya, I.; Voronov, B.; Goltsman, G. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Spectral sensitivity of narrow strip NbN superconducting single-photon detector |
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Conference Article |
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2011 |
Publication |
Proc. SPIE |
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Proc. SPIE |
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Volume |
8072 |
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80720G (1 to 9) |
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Keywords |
NbN SSPD, SNSPD |
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Superconducting single-photon detector (SSPD) is patterned from 4-nm-thick NbN film deposited on sapphire substrate as a 100-nm-wide strip. Due to its high detection efficiency, low dark counts, and picosecond timing jitter SSPD has become a competitor to the InGaAs avalanche photodiodes at 1550 nm and longer wavelengths. Although the SSPD is operated at liquid helium temperature its efficient single-mode fibre coupling enabled its usage in many applications ranging from single-photon sources research to quantum cryptography. In our strive to increase the detection efficiency at 1550 nm and longer wavelengths we developed and fabricated SSPD with the strip almost twice narrower compared to the standard 100 nm. To increase the voltage response of the device we utilized cascade switching mechanism: we connected 50-nm-wide and 10-μm-long strips in parallel covering the area of 10 μmx10 μm. Absorption of a photon breaks the superconductivity in a strip leading to the bias current redistribution between other strips followed their cascade switching. As the total current of all the strips about is 1 mA by the order of magnitude the response voltage of such an SSPD is several times higher compared to the traditional meander-shaped SSPDs. In middle infrared (about 3 μm wavelength) these devices have the detection efficiency several times higher compared to the traditional SSPDs. |
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SPIE |
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Fiurásek, J.; Prochazka, I. |
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Photon Counting Applications, Quantum Optics, and Quantum Information Transfer and Processing III |
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no |
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1387 |
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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. |
![goto web page (via DOI) doi](img/doi.gif)
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Superconducting hot-electron bolometer as THz mixer, direct detector and IR single-photon counter |
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2010 |
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35th Int. Conf. Infrared, Millimeter, and Terahertz Waves |
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1-1 |
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SSPD, SNSPD, HEB |
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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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2162-2027 |
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RPLAB @ sasha @ goltsman2010superconducting |
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1028 |
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Goltsman, G.; Korneev, A.; Divochiy, A.; Minaeva, O.; Tarkhov, M.; Kaurova, N.; Seleznev, V.; Voronov, B.; Okunev, O.; Antipov, A.; Smirnov, K.; Vachtomin, Yu.; Milostnaya, I.; Chulkova, G. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Ultrafast superconducting single-photon detector |
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Journal Article |
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2009 |
Publication |
J. Modern Opt. |
Abbreviated Journal |
J. Modern Opt. |
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Volume |
56 |
Issue |
15 |
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1670-1680 |
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SSPD, SNSPD |
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The state-of-the-art of the NbN nanowire superconducting single-photon detector technology (SSPD) is presented. The SSPDs exhibit excellent performance at 2 K temperature: 30% quantum efficiency from visible to infrared, negligible dark count rate, single-photon sensitivity up to 5.6 µm. The recent achievements in the development of GHz counting rate devices with photon-number resolving capability is presented. |
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0950-0340 |
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RPLAB @ akorneev @ |
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607 |
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Marsili, F.; Bitauld, D.; Fiore, A.; Gaggero, A.; Leoni, R.; Mattioli, F.; Divochiy, A.; Korneev, A.; Seleznev, V.; Kaurova, N.; Minaeva, O.; Goltsman, G. |
![goto web page (via DOI) doi](img/doi.gif)
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Title |
Superconducting parallel nanowire detector with photon number resolving functionality |
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Journal Article |
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2009 |
Publication |
J. Modern Opt. |
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J. Modern Opt. |
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56 |
Issue |
2-3 |
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334-344 |
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PNR; SSPD; SNSPD; thin superconducting films; photon number resolving detector; multiplication noise; telecom wavelength; NbN |
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We present a new photon number resolving detector (PNR), the Parallel Nanowire Detector (PND), which uses spatial multiplexing on a subwavelength scale to provide a single electrical output proportional to the photon number. The basic structure of the PND is the parallel connection of several NbN superconducting nanowires (100 nm-wide, few nm-thick), folded in a meander pattern. Electrical and optical equivalents of the device were developed in order to gain insight on its working principle. PNDs were fabricated on 3-4 nm thick NbN films grown on sapphire (substrate temperature TS=900C) or MgO (TS=400C) substrates by reactive magnetron sputtering in an Ar/N2 gas mixture. The device performance was characterized in terms of speed and sensitivity. The photoresponse shows a full width at half maximum (FWHM) as low as 660ps. PNDs showed counting performance at 80 MHz repetition rate. Building the histograms of the photoresponse peak, no multiplication noise buildup is observable and a one photon quantum efficiency can be estimated to be QE=3% (at 700 nm wavelength and 4.2 K temperature). The PND significantly outperforms existing PNR detectors in terms of simplicity, sensitivity, speed, and multiplication noise. |
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0950-0340 |
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RPLAB @ gujma @ |
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701 |
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