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Related Experiment Videos

Single quantum dot nanowire LEDs.

Ethan D Minot1, Freek Kelkensberg, Maarten van Kouwen

  • 1Kavli Institute of Nanoscience, Delft, The Netherlands.

Nano Letters
|February 15, 2007
PubMed
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Researchers fabricated indium phosphide-indium arsenide phosphide (InP-InAsP) nanowire light-emitting diodes. These devices confine electron-hole recombination to a quantum dot, showing promise for single photon applications in quantum optics.

Area of Science:

  • Semiconductor Nanowire Fabrication
  • Quantum Optics Devices
  • Optoelectronics

Background:

  • Indium phosphide (InP) and indium arsenide phosphide (InAsP) are key materials in optoelectronics.
  • Quantum dot structures are crucial for advanced light-emitting applications.
  • Electrically driven quantum optics requires precisely engineered light sources.

Purpose of the Study:

  • To report reproducible fabrication of InP-InAsP nanowire light-emitting diodes (nanoLEDs).
  • To demonstrate quantum dot-like confinement of electron-hole recombination.
  • To assess the potential for single photon applications in quantum optics.

Main Methods:

  • Fabrication of InP-InAsP nanowires with a quantum-dot-sized InAsP section.
  • Characterization of nanoLED operation at room temperature and 10 K.

Related Experiment Videos

  • Investigation of electron-hole recombination dynamics within the nanowire structure.

    • Main Results:

    • Reproducible fabrication of InP-InAsP nanoLEDs achieved.
    • Electron-hole recombination successfully confined to the InAsP quantum dot section.
    • Device operation demonstrated at both room temperature and cryogenic conditions (10 K).

    Conclusions:

    • The nanowire geometry naturally aligns the quantum dot with n-InP and p-InP regions.
    • These nanoLEDs are promising candidates for electrically driven quantum optics.
    • The system demonstrates potential for future single photon sources.