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Radiophysics and Quantum Electronics

WAVEGUIDE INTEGRATED SUPERCONDUCTING SINGLE-PHOTON DETECTOR FOR PHOTON AND ION QUANTUM PROCESSORS AND NEUROMORPHIC COMPUTING

Vadim V. Kovalyuk, И. О. Венедиктов, К. О. Седых, S. Svyatodukh, Selbi Hydyrova, Konstantin M. Moiseev, Irina Florya, A. I. Prokhodtsov, V. S. Galanova, Daniil A. Kobtsev, A. Yu. Kuzin, Alexander D. Golikov, G. N. Gol'Tsman

Published Nov 1, 2023• 0 citations
Publisher
DOI
10.52452/00213462_2023_66_11_927

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This article is a study of superconducting niobium(Nb)nanowires used as optical and near-infrared single photon detectors.In this paper,the fabrication process of Nb+Al based superconducting nanowire single photon detectors(SNSPD)using lift-off process will be presented.Transition temperature(Tc)of devices is measured with PPMS and good devices are chosen.With a DC bias current applied close to the critical current(Ic),the nanowire showed an electrical signal when illuminated by a laser pulse at the telecommunications wavelength(1550nm).The detection efficiency of 5nm-thickness SNSPD are measured.
Single-photon detection,which is the core of weak light detection,plays key role in the fields of quantum information,physics,biology,chemistry and astronomy.The low sensibility and the high dark count rate of traditional single-photon detectors which base on photomultiplier tube or avalanche photodiode limit the improvement of the signal noise ratio and the low counting rate limits the detecting speed and the dynamic range.Here we review the single-photon detecting technology using superconducting materials as light sensitive apparatus.Their quantum efficiency,dark count rate and counting rate outclass the traditional single-photon detector.Their appearances certainly will bring a great influence to the subjects relating to the single-photon detection.