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Related Experiment Videos

Single-ion two-photon source.

F Dubin1, D Rotter, M Mukherjee

  • 1Institute for Experimental Physics, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria.

Physical Review Letters
|November 13, 2007
PubMed
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Researchers created a pseudo-two-photon source from a single trapped ion, achieving 83% interference contrast. This novel source shows spectral brightness comparable to existing parametric down-conversion devices.

Area of Science:

  • Quantum optics
  • Atomic physics
  • Photonics

Background:

  • Single-photon sources are crucial for quantum technologies.
  • Developing efficient and bright two-photon sources is an ongoing challenge.
  • Trapped ions offer a promising platform for quantum information processing.

Purpose of the Study:

  • To develop a novel pseudo-two-photon source using a single trapped ion.
  • To characterize the interference properties and spectral brightness of the generated photons.
  • To compare the performance of this ion-based source with established technologies.

Main Methods:

  • Utilizing resonance fluorescence from a single trapped ion.
  • Implementing a Hong-Ou-Mandel interferometer by splitting and delaying the fluorescence.

Related Experiment Videos

  • Recombining the delayed and original fluorescence on a beam splitter to observe interference.

    • Main Results:

    • Successfully generated a pseudo-two-photon state from a single ion.
    • Observed destructive two-photon interference with a high contrast of 83(5)%.
    • Quantified the spectral brightness, demonstrating comparability to parametric down-conversion sources.

    Conclusions:

    • A single trapped ion can function as a viable pseudo-two-photon source.
    • The demonstrated interference contrast and brightness suggest potential for quantum applications.
    • This method offers an alternative approach to generating entangled photon pairs for quantum technologies.