Dauler EA, Robinson BS, Kerman AJ, Yang JKW, Rosfjord EKM, Anant V, et al. Multi-element superconducting nanowire single-photon detector. IEEE Trans Appl Supercond. 2007;17(2):279–84.
Abstract: A multi-element superconducting nanowire single photon detector (MESNSPD) is presented that consists of multiple independently-biased superconducting nanowire single photon detector (SNSPD) elements that form a continuous active area. A two-element SNSPD has been fabricated and tested, showing no measurable crosstalk between the elements, sub-50-ps relative timing jitter, and four times the maximum counting rate of a single SNSPD with the same active area. The MESNSPD can have a larger active area and higher speed than a single-element SNSPD and the input optics can be designed so that the detector provides spatial, spectral or photon number resolution.
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Yang JKW, Dauler E, Ferri A, Pearlman A, Verevkin A, Gol’tsman G, et al. Fabrication development for nanowire GHz-counting-rate single-photon detectors. IEEE Trans Appl Supercond. 2005;15(2):626–30.
Abstract: We have developed a fabrication process for GHz-counting-rate, single-photon, high-detection-efficiency, NbN, nanowire detectors. We have demonstrated two processes for the device patterning, one based on the standard polymethylmethacrylate (PMMA) organic positive-tone electron-beam resist, and the other based on the newer hydrogen silsesquioxane (HSQ) negative-tone spin-on-glass resist. The HSQ-based process is simple and robust, providing high resolution and the prospect of high fill-factors. Initial testing results show superconductivity in the films, and suggest that the devices exhibit photosensitivity.
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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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Rosfjord KM, Yang JKW, Dauler EA, Anant V, Berggren KK, Kerman AJ, et al. Increased detection efficiencies of nanowire single-photon detectors by integration of an optical cavity and anti-reflection coating. In: CLEO/QELS.; 2006. JTuF2 (1 to 2).
Abstract: We fabricate and test superconducting NbN-nanowire single-photon detectors with an integrated optical cavity and anti-reflection coating. We design the cavity and coating such as to maximize absorption in the NbN film of the detector.
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