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JOURNALS // Kvantovaya Elektronika // Archive

Kvantovaya Elektronika, 2005 Volume 35, Number 8, Pages 698–700 (Mi qe9152)

This article is cited in 1 paper

Fourth seminar to the memory of D.N. Klyshko

Superconducting single-photon ultrathin NbN film detector

A. A. Korneeva, O. V. Minaevaa, I. A. Rubtsovaa, I. I. Milostnayaa, G. M. Chulkovaa, B. M. Voronova, K. V. Smirnova, V. A. Selezneva, G. N. Gol'tsmana, A. Pearlmanb, W. Slyszb, A. Crossb, P. Alvarezb, A. Verevkinb, R. Sobolewskib

a Moscow State Pedagogical University
b University of Rochester, USA

Abstract: Superconducting single-photon ultrathin NbN film detectors are studied. The development of manufacturing technology of detectors and the reduction of their operating temperature down to 2 K resulted in a considerable increase in their quantum efficiency, which reached in the visible region (at 0.56 μm) 30%–40%, i.e., achieved the limit determined by the absorption coefficient of the film. The quantum efficiency exponentially decreases with increasing wavelength, being equal to ~20% at 1.55 μm and ~0.02% at 5 μm. For the dark count rate of ~10-4s-1, the experimental equivalent noise power was 1.5 × 10-20 W Hz-1/2; it can be decreased in the future down to the record low value of 5 × 10-21 W Hz-1/2. The time resolution of the detector is 30 ps.

PACS: 42.79.Pw, 74.78.Db

Received: 26.05.2005
Revised: 20.06.2005


 English version:
Quantum Electronics, 2005, 35:8, 698–700

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