Ultrafast superconducting single-photon detector

Gol’tsman, G.; Korneev, A.; Divochiy, A.; Minaeva, Olga; Tarkhov, M. A.; Kaurova, N.; Seleznev, V.; Voronov, B.; Okunev, O.; Antipov, A.V.; Смирнов, К. В.; Vachtomin, Y.; Milostnaya, I.; Chulkova, G.

doi:10.1080/09500340903277750

Cited by 32 publications

(35 citation statements)

References 31 publications

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“…A 1542 nm CW laser attenuated to a mean photon number of ~300,000 photons/s was used for the measurements at 0.7 K. The calibration of the input power to the SNSPD was performed as outlined in [3] using a NIST-calibrated InGaAs power meter. Although the detector was optimized for a wavelength of 1550 nm, measurements were performed at 1542 nm because the power meter was calibrated at that wavelength.…”

Section: Methodsmentioning

confidence: 99%

“…To a large extent, this progress has resulted from materials research and development. Improvements in the deposition techniques for polycrystalline superconductors such as NbN and NbTiN SNSPDs have led to system detection efficiencies (SDE) above 70% at a wavelength of 1550 nm [1,2], representing nearly an order of magnitude improvement over the first SNSPDs fabricated from NbN [3,4]. Alternatively, SNSPDs based on the amorphous superconductor W x Si 1-x have demonstrated ~93% SDE at 1550 nm [5].…”

Section: Introductionmentioning

confidence: 99%

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High-efficiency superconducting nanowire single-photon detectors fabricated from MoSi thin-films

et al. 2015

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We report on MoSi SNSPDs which achieved high system detection efficiency (87.1 ± 0.5% at 1542 nm) at 0.7 K and we demonstrate that these detectors can also be operated with saturated internal efficiency at a temperature of 2.3 K in a Gifford-McMahon cryocooler. We measured a minimum system jitter of 76 ps, maximum count rate approaching 10 MHz, and polarization dependence as low as 3.3 ± 0.1%. The performance of MoSi SNSPDs at 2.3 K is similar to the performance of WSi SNSPDs at < 1 K. The higher operating temperature of MoSi SNSPDs makes these devices promising for widespread use due to the simpler and less expensive cryogenics required for their operation. Sobolewski, "Response time characterization of NbN superconducting single-photon detectors," IEEE Trans. Appl. Supercond. 13(2), 180-183 (2003). 11. H. Takesue, S. W. Nam, Q. Zhang, R. H. Hadfield, T. Honjo, K. Tamaki, and Y. Yamamoto, "Quantum key distribution over a 40-dB channel loss using superconducting single-photon detectors," Nat. Photonics 1(6), 343-348 (2007

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-efficiency superconducting nanowire single-photon detectors fabricated from MoSi thin-films

et al. 2015

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“…Such circuits are promising for use in both classical and quantum optical technologies, including characterization of quantum emitters [13,14], optical time domain reflectometry (OTDR) [15][16][17], quantum key distribution [18,19] and other tasks where several key requirements have to be met simultaneously: compact design, high quantum efficiency, broad spectral range and high timing resolution. One of the main elements of such circuits is a superconducting single-photon detector (SSPD) [20,21], which is realized by U-shaped NbN nanowires atop of a nanophotonic waveguide [10]. The detection mechanism of such devices is based on the transition from the superconducting to the normal state upon the absorption of a single photon, which leads to the creation of a localized hot-spot [22].…”

Section: Introductionmentioning

confidence: 99%

Absorption engineering of NbN nanowires deposited on silicon nitride nanophotonic circuits

Kovalyuk¹,

Hartmann²,

Kahl³

et al. 2013

Opt. Express

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Abstract:We investigate the absorption properties of U-shaped niobium nitride (NbN) nanowires atop nanophotonic circuits. Nanowires as narrow as 20nm are realized in direct contact with Si3N4 waveguides and their absorption properties are extracted through balanced measurements. We perform a full characterization of the absorption coefficient in dependence of length, width and separation of the fabricated nanowires, as well as for waveguides with different cross-section and etch depth. Our results show excellent agreement with finite-element analysis simulations for all considered parameters. The experimental data thus allows for optimizing absorption properties of emerging single-photon detectors co-integrated with telecom wavelength optical circuits. Harris, "High quality mechanical and optical properties of commercial silicon nitride membranes," Appl.

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“…(ii) The double-channel SSPD was made by Scontel Ltd. from Russia, and worked with a refrigeration system [17] which could obtain a temperature of 1.7 K. The detector had a counting rate more than 70 MHz, and a jitter value better than 50 ps. By carefully increasing the bias current, we achieved 3.0% average quantum efficiency with 1 Hz DCR.…”

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confidence: 99%