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Intrinsic quantum efficiency and electro-thermal model of a superconducting nanowire single-photon detector


Semenov, A; Haas, P; Hübers, H W; Il'in, K; Siegel, M; Kirste, A; Drung, D; Schurig, T; Engel, A (2009). Intrinsic quantum efficiency and electro-thermal model of a superconducting nanowire single-photon detector. Journal of Modern Optics, 56(2):345-351.

Abstract

Superconducting single-photon detectors from thin niobium nitride nanostrips exhibit a cut-off of the wavelength-independent quantum efficiency along with a moderate energy resolution in the near-infrared spectral range. Before the cut-off, the intrinsic quantum efficiency of the detector reaches ≈30% of the ultimate value, which is physically limited to the absorbance of the detector structure. The intrinsic quantum efficiency is most likely controlled by non-homogeneities of the niobium nitride films. We have developed an electro-thermal model of the detector response that allowed us to optimize the SQUID-based readout and to achieve, in the temperature range from 1 to 6 K, the photon count rate 3 times 107 s-1 and a dark count rate less than 10-4 s-1.

Abstract

Superconducting single-photon detectors from thin niobium nitride nanostrips exhibit a cut-off of the wavelength-independent quantum efficiency along with a moderate energy resolution in the near-infrared spectral range. Before the cut-off, the intrinsic quantum efficiency of the detector reaches ≈30% of the ultimate value, which is physically limited to the absorbance of the detector structure. The intrinsic quantum efficiency is most likely controlled by non-homogeneities of the niobium nitride films. We have developed an electro-thermal model of the detector response that allowed us to optimize the SQUID-based readout and to achieve, in the temperature range from 1 to 6 K, the photon count rate 3 times 107 s-1 and a dark count rate less than 10-4 s-1.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Language:English
Date:January 2009
Deposited On:27 Mar 2009 10:16
Last Modified:05 Apr 2016 13:11
Publisher:Taylor & Francis
ISSN:0950-0340
Additional Information:This is an electronic version of an article published in Journal of Modern Optics 2009, 56(2):345-351 is available online at http://www.informaworld.com/smpp/content~db=all?content=10.1080/09500340802578589
Publisher DOI:https://doi.org/10.1080/09500340802578589

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