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Related Experiment Videos

Optically bright quantum dots in single Nanowires.

Magnus T Borgström1, Valery Zwiller, Elisabeth Müller

  • 1Quantum Photonics Group, Institute of Quantum Electronics, ETH Hönggerberg HPT G10, CH 8093, Zürich, Switzerland. borgstrom@phys.ethz.ch

Nano Letters
|September 24, 2005
PubMed
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We created bright single photon sources using quantum dots in nanowires. These optically active quantum dots offer superior brightness and control for future quantum technologies.

Area of Science:

  • Quantum optics
  • Nanoscience
  • Materials science

Background:

  • Quantum dots (QDs) are crucial for quantum technologies.
  • Developing efficient single photon sources is essential for quantum information processing.
  • Current QD fabrication methods face limitations in brightness and control.

Purpose of the Study:

  • To fabricate and demonstrate optically active quantum dots (QDs) embedded in single nanowires.
  • To confirm the zero-dimensional nature of these heterostructures.
  • To showcase their potential as bright single photon sources.

Main Methods:

  • Epitaxial growth of quantum dots within single nanowires on various substrates, including silicon.
  • Optical characterization to observe photon antibunching.

Related Experiment Videos

  • Performance comparison with self-assembled quantum dots.

    • Main Results:

    • Demonstrated optically active quantum dots embedded in single nanowires.
    • Photon antibunching confirmed the zero-dimensional nature of the heterostructures.
    • Nanowire quantum dots exhibited single photon emission, an order of magnitude brighter than self-assembled QDs.

    Conclusions:

    • Nanowire-embedded quantum dots are intense single photon sources.
    • Their epitaxial growth on silicon and tunable properties make them versatile.
    • These quantum dots are ideal building blocks for controlled quantum dot molecules and scalable quantum systems.