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Related Experiment Videos

Electrically driven single-photon source.

Zhiliang Yuan1, Beata E Kardynal, R Mark Stevenson

  • 1Toshiba Research Europe Limited, Cambridge Research Laboratory, 260 Cambridge Science Park, Milton Road, Cambridge, CB4 0WE, UK.

Science (New York, N.Y.)
|December 18, 2001
PubMed
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Electrically driven single quantum dots act as single-photon sources. Semiconductor technology can mass-produce these sources for quantum information technology applications.

Area of Science:

  • Solid State Physics
  • Quantum Optics
  • Semiconductor Nanotechnology

Background:

  • Single-photon sources are crucial for quantum information technologies.
  • Electrically driven sources offer advantages in integration and scalability.
  • Quantum dots exhibit unique optical properties suitable for single-photon emission.

Purpose of the Study:

  • To demonstrate electroluminescence from a single quantum dot as an electrically driven single-photon source.
  • To characterize the optical properties and emission mechanisms of the quantum dot.
  • To assess the potential for mass production of such sources using semiconductor technology.

Main Methods:

  • Fabrication of a p-i-n junction incorporating a single quantum dot.
  • Characterization of electroluminescence spectra at varying injection currents.

Related Experiment Videos

  • Measurement of the second-order correlation function to confirm single-photon emission.
  • Stimulation of single-photon emission using voltage pulses.

    • Main Results:

    • Electroluminescence revealed a single sharp exciton recombination line at low currents.
    • A biexciton recombination line emerged at higher currents.
    • The second-order correlation function demonstrated photon anti-bunching under continuous drive current.
    • Subnanosecond voltage pulses successfully stimulated single-photon emission.

    Conclusions:

    • A single quantum dot in a p-i-n junction functions as an electrically driven single-photon source.
    • Semiconductor fabrication techniques can be leveraged for mass production.
    • This technology holds promise for advancing quantum information processing and communication.