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Baek B, Lita AE, Verma V, Nam SW. Superconducting a-WxSi1–x nanowire single-photon detector with saturated internal quantum efficiency from visible to 1850 nm. Appl Phys Lett. 2011;98(25):3.
Abstract: We have developed a single-photon detector based on superconducting amorphous tungsten–silicon alloy (a-WxSi1–x) nanowire. Our device made from a uniform a-WxSi1–x nanowire covers a practical detection area (16 μm×16 μm) and shows high sensitivity featuring a plateau of the internal quantum efficiencies, i.e., efficiencies of generating an electrical pulse per absorbed photon, over a broad wavelength and bias range. This material system for superconducting nanowire detector technology could overcome the limitations of the prevalent nanowire devices based on NbN and lead to more practical, ideal single-photon detectors having high efficiency, low noise, and high count rates.
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Tanner MG, Natarajan CM, Pottapenjara VK, O'Connor JA, Warburton RJ, Hadfield RH, et al. Enhanced telecom wavelength single-photon detection with NbTiN superconducting nanowires on oxidized silicon. Appl Phys Lett. 2010;96(22):3.
Abstract: Superconducting nanowire single-photon detectors (SNSPDs) have emerged as a highly promising infrared single-photon detector technology. Next-generation devices are being developed with enhanced detection efficiency (DE) at key technological wavelengths via the use of optical cavities. Furthermore, new materials and substrates are being explored for improved fabrication versatility, higher DE, and lower dark counts. We report on the practical performance of packaged NbTiN SNSPDs fabricated on oxidized silicon substrates in the wavelength range from 830 to 1700 nm. We exploit constructive interference from the SiO2/Si interface in order to achieve enhanced front-side fiber-coupled DE of 23.2 % at 1310 nm, at 1 kHz dark count rate, with 60 ps full width half maximum timing jitter.
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Minaeva O, Fraine A, Korneev A, Divochiy A, Goltsman G, Sergienko A. High resolution optical time-domain reflectometry using superconducting single-photon detectors. In: Frontiers in Opt. 2012/Laser Sci. XXVIII. Optical Society of America; 2012. Fw3a.39.
Abstract: 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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Dauler EA, Kerman AJ, Robinson BS, Yang JKW, Voronov BM, Gol’tsman GN, et al. Achieving high counting rates in superconducting nanowire single-photon detectors. In: CLEO/QELS. Optical Society of America; 2006. JTuD3 (1 to 2).
Abstract: Kinetic inductance is determined to be the primary limitation to the counting rate of superconducting nanowire single-photon counters. Approaches for overcoming this limitation will be discussed.
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Goltsman G. Superconducting thin film nanostructures as terahertz and infrared heterodyne and direct detectors. In: 16th ISEC.; 2017. Th-I-QTE-03 (1 to 3).
Abstract: We present our recent achievements in the development of superconducting nanowire single-photon detectors (SNSPDs) integrated with optical waveguides on a chip. We demonstrate both single-photon counting with up to 90% on-chipquantum-efficiency (OCDE), and the heterodyne mixing with a close to the quantum limit sensitivity at the telecommunication wavelength using single device.
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