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Proceedings Paper

Ultrafast and high quantum efficiency large-area superconducting single-photon detectors
Author(s): A. Korneev; O. Minaeva; A. Divochiy; A. Antipov; N. Kaurova; V. Seleznev; B. Voronov; G. Gol'tsman; D. Pan; J. Kitaygorsky; W. Slysz; Roman Sobolewski
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Paper Abstract

We present our latest generation of superconducting single-photon detectors (SSPDs) patterned from 4-nm-thick NbN films, as meander-shaped ~0.5-mm-long and ~100-nm-wide stripes. The SSPDs exhibit excellent performance parameters in the visible-to-near-infrared radiation wavelengths: quantum efficiency (QE) of our best devices approaches a saturation level of ~30% even at 4.2 K (limited by the NbN film optical absorption) and dark counts as low as 2x10-4 Hz. The presented SSPDs were designed to maintain the QE of large-active-area devices, but, unless our earlier SSPDs, hampered by a significant kinetic inductance and a nanosecond response time, they are characterized by a low inductance and GHz counting rates. We have designed, simulated, and tested the structures consisting of several, connected in parallel, meander sections, each having a resistor connected in series. Such new, multi-element geometry led to a significant decrease of the device kinetic inductance without the decrease of its active area and QE. The presented improvement in the SSPD performance makes our detectors most attractive for high-speed quantum communications and quantum cryptography applications.

Paper Details

Date Published: 15 May 2007
PDF: 9 pages
Proc. SPIE 6583, Photon Counting Applications, Quantum Optics, and Quantum Cryptography, 65830I (15 May 2007); doi: 10.1117/12.723684
Show Author Affiliations
A. Korneev, Moscow State Pedagogical Univ. (Russia)
O. Minaeva, Moscow State Pedagogical Univ. (Russia)
A. Divochiy, Moscow State Pedagogical Univ. (Russia)
A. Antipov, Moscow State Pedagogical Univ. (Russia)
N. Kaurova, Moscow State Pedagogical Univ. (Russia)
V. Seleznev, Moscow State Pedagogical Univ. (Russia)
B. Voronov, Moscow State Pedagogical Univ. (Russia)
G. Gol'tsman, Moscow State Pedagogical Univ. (Russia)
D. Pan, Univ. of Rochester (United States)
J. Kitaygorsky, Univ. of Rochester (United States)
W. Slysz, Institute of Electron Technology (Poland)
Roman Sobolewski, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 6583:
Photon Counting Applications, Quantum Optics, and Quantum Cryptography
Miloslav Dusek; Ivan Prochazka; Mark S. Hillery; Alan L. Migdall; Wolfgang P. Schleich; Alexandre Pauchard, Editor(s)

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