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Author Takesue, Hiroki; Nam, Sae Woo; Zhang, Qiang; Hadfield, Robert H.; Honjo, Toshimori; Tamaki, Kiyoshi; Yamamoto, Yoshihisa
Title Quantum key distribution over a 40-dB channel loss using superconducting single-photon detectors Type Journal Article
Year 2007 Publication Nature Photonics Abbreviated Journal Nat. Photon.
Volume 1 Issue (up) Pages 343-348
Keywords quantum cryptography, SSPD, QKD, DSP
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Call Number RPLAB @ akorneev @ Serial 609
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Author Stevens, M.; Hadfield, R.; Schwall, R.; Nam, S.W.; Mirin, R.; Gupta, J.
Title Fast lifetime measurements of infrared emitters using a low-jitter superconduct- ing single-photon detector Type Journal Article
Year 2006 Publication Applied Physics Letters Abbreviated Journal Appl. Phys. Lett.
Volume 89 Issue (up) Pages 031109
Keywords SSPD, jitter, QD, QW
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Call Number RPLAB @ akorneev @ Serial 611
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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
Title Recent advances in superconducting NbN single-photon detector development Type Conference Article
Year 2011 Publication Proc. SPIE Abbreviated Journal Proc. SPIE
Volume 8072 Issue (up) Pages 807202 (1 to 10)
Keywords SSPD
Abstract 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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Call Number RPLAB @ gujma @ Serial 663
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Author Driessen, Eduard Frans Clemens
Title Coupling light to periodic nanostructures Type Journal Article
Year 2009 Publication Faculty of Science, Leiden University Abbreviated Journal Fac. Scien., Leiden Un.
Volume Issue (up) Pages 144
Keywords SSPD
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Notes Issue Date: 2009-09-24 Approved no
Call Number RPLAB @ gujma @ Serial 675
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Author Engel, Andreas; Aeschbacher, Adrian; Inderbitzin, Kevin; Schilling, Andreas; Il'in, Konstantin; Hofherr, Matthias; Siegel, Michael; Semenov, Alexei; Hübers, Heinz-Wilhelm
Title Tantalum nitride superconducting single-photon detectors with low cut-off energy Type Journal Article
Year 2011 Publication arXiv Abbreviated Journal arXiv
Volume Issue (up) Pages 9
Keywords SSPD
Abstract Materials with a small superconducting energy gap favor a high detection efficiency of low-energy photons in superconducting nanowire single-photon detectors. We developed a TaN detector with smaller gap and lower density of states at the Fermi energy than in comparable NbN devices, while other relevant parameters remain essentially unchanged. This results in a reduction of the minimum photon energy required for direct detection to $\approx1/3$ as compared to NbN.
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Call Number RPLAB @ gujma @ Serial 687
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