A cascade switching superconducting single photon detector

Ejrnæs, M.; Cristiano, R.; Quaranta, Orlando; Pagano, S.; Gaggero, A.; Mattioli, F.; Leoni, R.; Voronov, B.; Gol’tsman, G.

doi:10.1063/1.2828138

Cited by 117 publications

(81 citation statements)

References 8 publications

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“…In conclusion, our single-photon detector system based on WSi SNSPDs showed system detection efficiency SDE > 90% around λ = 1550 nm and device dark count rate DDCR < 10 cps up to a temperature of T = 2 K. We expect our detector system to achieve a system dark count rate limited by the device intrinsic dark count rate (SDCR ≈ DDCR < 1 cps) by filtering the blackbody photons with a cold filter. In the future, by adopting a parallel architecture (superconducting nanowire avalanche photodetector, SNAP 21,28,29 ), we expect to reduce the reset time of our SNSPDs below 10 ns and to increase the signal-to-noise ratio 21 , which would allow the jitter of the detector system to be reduced.…”

Section: Lettermentioning

confidence: 99%

Detecting single infrared photons with 93% system efficiency

et al. 2013

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Introductory paragraphSingle-photon detectors (SPDs) 1 at near-infrared wavelengths with high system detection efficiency (> 90%), low dark count rate (< 1 counts per second, cps), low timing jitter (< 100 ps), and short reset time (< 100 ns) would enable landmark experiments in a variety of fields [2][3][4][5][6] . Although some of the existing approaches to single-photon detection fulfill one or two of the above specifications 1 , to date no detector has met all of the specifications simultaneously. Here we report on a fiber-coupled singlephoton-detection system employing superconducting nanowire single-photon detectors (SNSPDs) 7 that closely approaches the ideal performance of SPDs. Our detector system has a system detection efficiency (SDE), including optical-coupling losses, greater than 90% in the wavelength range λ = 1520 -1610 nm; device dark count rate (measured with the device shielded from room-temperature blackbody radiation) of ≈ 0.01 cps; timing jitter of ≈ 150 ps FWHM; and reset time of 40 ns.

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Section: Lettermentioning

confidence: 99%

Detecting single infrared photons with 93% system efficiency

et al. 2013

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“…A lot of attention has been given to the electronic operation of these detectors [4][5][6], and the exact microscopic working principle of the detectors is still under active investigation [7,8]. On a macroscopic level, a photon that is absorbed by the superconducting wire triggers a temporary loss of superconductivity, which gives rise to a finite voltage pulse across the detector.…”

Section: Introductionmentioning

confidence: 99%

Impedance model for the polarization-dependent optical absorption of superconducting single-photon detectors

Driessen

Braakman

Reiger

et al. 2009

Eur. Phys. J. Appl. Phys.

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Abstract.We measured the single-photon detection efficiency of NbN superconducting single-photon detectors as a function of the polarization state of the incident light for different wavelengths in the range from 488 nm to 1550 nm. The polarization contrast varies from ∼5% at 488 nm to ∼30% at 1550 nm, in good agreement with numerical calculations. We use an optical-impedance model to describe the absorption for polarization parallel to the wires of the detector. For the extremely lossy NbN material, the absorption can be kept constant by keeping the product of layer thickness and filling factor constant. As a consequence, the maximum possible absorption is independent of filling factor. By illuminating the detector through the substrate, an absorption efficiency of ∼ 70% can be reached for a detector on Si or GaAs, without the need for an optical cavity.PACS. 85.25.-j Superconducting devices -13.88.+e Polarization in interactions and scattering

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“…5 Therefore, a "parallel" strip-line configuration is adopted to increase the coverage area whilst retaining an ultra-fast response. 6,7 This simple idea allows precise control of the kinetic inductance of stripline elements, leading to the realization of an SSLD with a sensitive area up to 2 Â 2 mm 2 with a sub-nanosecond response time. 4 In these large area SSLDs, a relatively low ratio of bias current to critical current (I B /I C < 55%) is required to prevent device latching.…”

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Current distribution in a parallel configuration superconducting strip-line detector

Casaburi

Heath

Tanner

et al. 2013

Applied Physics Letters

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Superconducting detectors based on parallel microscopic strip-lines are promising candidates for single molecule detection in time-of-flight mass spectrometry. The device physics of this configuration is complex. In this letter, we employ nano-optical techniques to study the variation of current density, count rate, and pulse amplitude transversely across the parallel strip device. Using the phenomenological London theory, we are able to correlate our results to a non-uniform current distribution between the strips, governed by the London magnetic penetration depth. This fresh perspective convincingly explains anomalous behaviour in large area parallel superconducting strip-line detectors reported in previous studies.

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A cascade switching superconducting single photon detector

Cited by 117 publications

References 8 publications

Detecting single infrared photons with 93% system efficiency

Detecting single infrared photons with 93% system efficiency

Impedance model for the polarization-dependent optical absorption of superconducting single-photon detectors

Current distribution in a parallel configuration superconducting strip-line detector

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