Moshkova MA, Morozov PV, Antipov AV, Vakhtomin YB, Smirnov KV. High-efficiency multi-element superconducting single-photon detector. In: Prochazka I, Štefaňák M, Sobolewski R, Gábris A, editors. Proc. SPIE. Vol 11771. SPIE; 2021. p. 2–8.
Abstract: We present the result of the creation and investigation of the multi-element superconducting single photon detectors, which can recognize the number of photons (up to six) in a short pulse of the radiation at telecommunication wavelengths range. The best receivers coupled with single-mode fiber have the system quantum efficiency of ⁓85%. The receivers have a 100 ps time resolution and a few nanoseconds dead time that allows them to operate at megahertz counting rate. Implementation of the multi-element architecture for creation of the superconducting single photon detectors with increased sensitive area allows to create the high efficiency receivers coupled with multi-mode fibers and with preserving of the all advantages of superconducting photon counters.
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Schroeder E, Mauskopf P, Pilyavsky G, Sinclair A, Smith N, Bryan S, et al. On the measurement of intensity correlations from laboratory and astronomical sources with SPADs and SNSPDs. In: Malbet F, Creech-Eakman MJ, Tuthill PG, editors. Proc. SPIE. Vol 9907. SPIE; 2016. 99070P (1 to 13).
Abstract: We describe the performance of detector modules containing silicon single photon avalanche photodiodes (SPADs) and superconducting nanowire single photon detectors (SNSPDs) to be used for intensity interferometry. The SPADs are mounted in fiber-coupled and free-space coupled packages. The SNSPDs are mounted in a small liquid helium cryostat coupled to single mode fiber optic cables which pass through a hermetic feed-through. The detectors are read out with microwave amplifiers and FPGA-based coincidence electronics. We present progress on measurements of intensity correlations from incoherent sources including gas-discharge lamps and stars with these detectors. From the measured laboratory performance of the correlation system, we estimate the sensitivity to intensity correlations from stars using commercial telescopes and larger existing research telescopes.
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Shcherbatenko M, Lobanov Y, Semenov A, Kovalyuk V, Korneev A, Ozhegov R, et al. Coherent detection of weak signals with superconducting nanowire single photon detector at the telecommunication wavelength. In: Prochazka I, Sobolewski R, James RB, editors. Proc. SPIE. Vol 10229. Spie; 2017. 0G (1 to 12).
Abstract: Achievement of the ultimate sensitivity along with a high spectral resolution is one of the frequently addressed problems, as the complication of the applied and fundamental scientific tasks being explored is growing up gradually. In our work, we have investigated performance of a superconducting nanowire photon-counting detector operating in the coherent mode for detection of weak signals at the telecommunication wavelength. Quantum-noise limited sensitivity of the detector was ensured by the nature of the photon-counting detection and restricted by the quantum efficiency of the detector only. Spectral resolution given by the heterodyne technique and was defined by the linewidth and stability of the Local Oscillator (LO). Response bandwidth was found to coincide with the detector’s pulse width, which, in turn, could be controlled by the nanowire length. In addition, the system noise bandwidth was shown to be governed by the electronics/lab equipment, and the detector noise bandwidth is predicted to depend on its jitter. As have been demonstrated, a very small amount of the LO power (of the order of a few picowatts down to hundreds of femtowatts) was required for sufficient detection of the test signal, and eventual optimization could lead to further reduction of the LO power required, which would perfectly suit for the foreseen development of receiver matrices and the need for detection of ultra-low signals at a level of less-than-one-photon per second.
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Danerud M, Winkler D, Zorin M, Trifonov V, Karasik B, Gershenzon EM, et al. Picosecond detection of infrared radiation with YBa2Cu3O7-δ thin films. In: Birch JR, Parker TJ, editors. Proc. SPIE. Vol 2104. Spie; 1993. p. 183–4.
Abstract: Picosecond nonequilibrium and slow bolometric responses from a patterned high-Tc superconducting (HTS) film due toinfrared radiation were investigated using both modulation and pulse techniques. Measurements at A, = 0.85 [tm andA, = 10.6 lim have shown a similar behaviour of the response vs modulation frequency f. The responsivity of the HTS filmbased detector at f ..- 0.6-1 GHz is estimated to be 10-2 – 10-1 V/W.
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Korneev A, Divochiy A, Marsili F, Bitauld D, Fiore A, Seleznev V, et al. Superconducting photon number resolving counter for near infrared applications. In: Tománek P, Senderáková D, Hrabovský M, editors. Proc. SPIE. Vol 7138. Spie; 2008. 713828 (1 to 5).
Abstract: We present a novel concept of photon number resolving detector based on 120-nm-wide superconducting stripes made of 4-nm-thick NbN film and connected in parallel (PNR-SSPD). The detector consisting of 5 strips demonstrate a capability to resolve up to 4 photons absorbed simultaneously with the single-photon quantum efficiency of 2.5% and negligibly low dark count rate.
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