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Proceedings Paper

Recent advances in superconducting NbN single-photon detector development
Author(s): Alexander Korneev; Alexander Divochiy; Yury Vachtomin; Yulia Korneeva; Irina Florya; Michael Elezov; Nadezhda Manova; Michael Tarkhov; Pavel An; Anna Kardakova; Anastasiya Isupova; Galina Chulkova; Konstantin Smirnov; Natalya Kaurova; Vitaliy Seleznev; Boris Voronov; Gregory Goltsman
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Paper Abstract

Superconducting single-photon detector (SSPD) is a planar nanostructure patterned from 4-nm-thick NbN film deposited on sapphire substrate. The sensitive element of the SSPD is 100-nm-wide NbN strip. The device is operated at liquid helium temperature. Absorption of a photon leads to a local suppression of superconductivity producing subnanosecond-long voltage pulse. In infrared (at 1550 nm and longer wavelengths) SSPD outperforms avalanche photodiodes in terms of detection efficiency (DE), dark counts rate, maximum counting rate and timing jitter. Efficient single-mode fibre coupling of the SSPD enabled its usage in many applications ranging from single-photon sources research to quantum cryptography. Recently we managed to improve the SSPD performance and measured 25% detection efficiency at 1550 nm wavelength and dark counts rate of 10 s-1. We also improved photon-number resolving SSPD (PNR-SSPD) which realizes a spatial multiplexing of incident photons enabling resolving of up to 4 simultaneously absorbed photons. Another improvement is the increase of the photon absorption using a λ/4 microcavity integrated with the SSPD. And finally in our strive to increase the DE at longer wavelengths we fabricated SSPD with the strip almost twice narrower compared to the standard 100 nm and demonstrated that in middle infrared (about 3 μm wavelength) these devices have DE several times higher compared to the traditional SSPDs.

Paper Details

Date Published: 5 May 2011
PDF: 10 pages
Proc. SPIE 8072, Photon Counting Applications, Quantum Optics, and Quantum Information Transfer and Processing III, 807202 (5 May 2011); doi: 10.1117/12.889110
Show Author Affiliations
Alexander Korneev, Moscow State Pedagogical Univ. (Russian Federation)
Alexander Divochiy, SCONTEL (Russian Federation)
Yury Vachtomin, Moscow State Pedagogical Univ. (Russian Federation)
SCONTEL (Russian Federation)
Yulia Korneeva, Moscow State Pedagogical Univ. (Russian Federation)
Irina Florya, Moscow State Pedagogical Univ. (Russian Federation)
Michael Elezov, Moscow State Pedagogical Univ. (Russian Federation)
Nadezhda Manova, Moscow State Pedagogical Univ. (Russian Federation)
Michael Tarkhov, Moscow State Pedagogical Univ. (Russian Federation)
Pavel An, Moscow State Pedagogical Univ. (Russian Federation)
Anna Kardakova, Moscow State Pedagogical Univ. (Russian Federation)
Anastasiya Isupova, Moscow State Pedagogical Univ. (Russian Federation)
Galina Chulkova, Moscow State Pedagogical Univ. (Russian Federation)
Konstantin Smirnov, Moscow State Pedagogical Univ. (Russian Federation)
SCONTEL (Russian Federation)
Natalya Kaurova, Moscow State Pedagogical Univ. (Russian Federation)
SCONTEL (Russian Federation)
Vitaliy Seleznev, Moscow State Pedagogical Univ. (Russian Federation)
SCONTEL (Russian Federation)
Boris Voronov, Moscow State Pedagogical Univ. (Russian Federation)
Gregory Goltsman, Moscow State Pedagogical Univ. (Russian Federation)
SCONTEL (Russian Federation)


Published in SPIE Proceedings Vol. 8072:
Photon Counting Applications, Quantum Optics, and Quantum Information Transfer and Processing III
Jaromír Fiurásek; Ivan Prochazka, Editor(s)

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