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Three-dimensional imaging of cavity vacuum with single atoms localized by a nanohole array

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  • Moonjoo Lee

    (Seoul National University
    Present address: Institute for Quantum Electronics, ETH Zürich, Zürich CH-8093, Switzerland)

  • Junki Kim

    (Seoul National University)

  • Wontaek Seo

    (Seoul National University)

  • Hyun-Gue Hong

    (Seoul National University)

  • Younghoon Song

    (Seoul National University)

  • Ramachandra R. Dasari

    (G. R. Harrison Spectroscopy Laboratory, Massachusetts Institute of Technology)

  • Kyungwon An

    (Seoul National University)

Abstract

Zero-point electromagnetic fields were first introduced to explain the origin of atomic spontaneous emission. Vacuum fluctuations associated with the zero-point energy in cavities are now utilized in quantum devices such as single-photon sources, quantum memories, switches and network nodes. Here we present three-dimensional (3D) imaging of vacuum fluctuations in a high-Q cavity based on the measurement of position-dependent emission of single atoms. Atomic position localization is achieved by using a nanoscale atomic beam aperture scannable in front of the cavity mode. The 3D structure of the cavity vacuum is reconstructed from the cavity output. The root mean squared amplitude of the vacuum field at the antinode is also measured to be 0.92±0.07 V cm−1. The present work utilizing a single atom as a probe for sub-wavelength imaging demonstrates the utility of nanometre-scale technology in cavity quantum electrodynamics.

Suggested Citation

  • Moonjoo Lee & Junki Kim & Wontaek Seo & Hyun-Gue Hong & Younghoon Song & Ramachandra R. Dasari & Kyungwon An, 2014. "Three-dimensional imaging of cavity vacuum with single atoms localized by a nanohole array," Nature Communications, Nature, vol. 5(1), pages 1-6, May.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4441
    DOI: 10.1038/ncomms4441
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