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Absorption imaging of a single atom

Author

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  • Erik W. Streed

    (Centre for Quantum Dynamics, Griffith University)

  • Andreas Jechow

    (Centre for Quantum Dynamics, Griffith University)

  • Benjamin G. Norton

    (Centre for Quantum Dynamics, Griffith University)

  • David Kielpinski

    (Centre for Quantum Dynamics, Griffith University)

Abstract

Absorption imaging has played a key role in the advancement of science from van Leeuwenhoek's discovery of red blood cells to modern observations of dust clouds in stellar nebulas and Bose–Einstein condensates. Here we show the first absorption imaging of a single atom isolated in a vacuum. The optical properties of atoms are thoroughly understood, so a single atom is an ideal system for testing the limits of absorption imaging. A single atomic ion was confined in an RF Paul trap and the absorption imaged at near wavelength resolution with a phase Fresnel lens. The observed image contrast of 3.1 (3)% is the maximum theoretically allowed for the imaging resolution of our set-up. The absorption of photons by single atoms is of immediate interest for quantum information processing. Our results also point out new opportunities in imaging of light-sensitive samples both in the optical and X-ray regimes.

Suggested Citation

  • Erik W. Streed & Andreas Jechow & Benjamin G. Norton & David Kielpinski, 2012. "Absorption imaging of a single atom," Nature Communications, Nature, vol. 3(1), pages 1-5, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1944
    DOI: 10.1038/ncomms1944
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