Single-pixel imaging with heralded single photons

Steven Johnson*, Alex McMillan, Cyril Torre, Stefan Frick, John Rarity, Miles Padgett

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Traditional remote sensing applications are often based on pulsed laser illumination with a narrow linewidth and characteristic repetition rate, which are not conducive to covert operation. Whatever methods are employed for covert sensing, a key requirement is for the probe light to be indistinguishable from background illumination. We present a method to perform single-pixel imaging that suppresses the effect of background light and hence improves the signal-to-noise ratio by using correlated photon-pairs produced via spontaneous parametric down conversion. One of the photons in the pair is used to illuminate the object whilst the other acts as a temporal reference, allowing the signal photons to be distinguished from background noise. Understanding the noise regime is key to producing higher contrast images using this heralding method.
Original languageEnglish
Pages (from-to)826-833
Number of pages8
JournalOptics Continuum
Issue number4
Early online date7 Apr 2022
Publication statusPublished - 15 Apr 2022


  • covert sensing
  • single-pixel imaging
  • heralding
  • photon-pairs


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