Waveguide nanowire superconducting single-photon detectors fabricated on GaAs and the study of their optical properties

D. Sahin, A. Gaggero, J.W. Weber, I. Agafonov, M.A. Verheijen, F. Mattioli, J. Beetz, M. Kamp, S. Hofling, M.C.M. van de Sanden, R. Leoni, A. Fiore

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20 Citations (Scopus)
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Abstract

Quantum photonic integration is one of the leading approaches for enabling the implementation of quantum simulation and computing at the scale of tens to hundreds of photons. Quantum photonic integrated circuits require the monolithic integration of single-photon sources and passive circuit elements, such as waveguides and couplers, with single-photon detectors. A promising approach for on-chip single-photon detection is the use of superconducting nanowires on top of semiconductor waveguides. Here, we present state-of-the-art NbN films on GaAs for the realization of waveguide superconducting single-photon detectors, suitable for integration with sources and linear optical circuits. Based on the measured optical properties, we propose a new design which allows high absorptance for short nanowires in order to increase the integration density in a quantum photonic chip. Finally, we review recent results on integrated single-photon and photon-number-resolving detectors, and integrated autocorrelators.

Original languageEnglish
Article number3800210
Pages (from-to)1-10
JournalIEEE Journal of Selected Topics in Quantum Electronics
Volume21
Issue number2
DOIs
Publication statusPublished - 1 Mar 2015

Keywords

  • Infrared detectors
  • NbN thin films
  • single-photon detectors
  • superconducting photodetectors

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