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Updated: Jul 6, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
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Single-nanowire electrically driven lasers.

Xiangfeng Duan1, Yu Huang, Ritesh Agarwal

  • 1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.

Nature
|January 17, 2003
PubMed
Summary
This summary is machine-generated.

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Researchers demonstrate electrically driven lasing in individual cadmium sulfide nanowires. This breakthrough offers a path toward low-cost, integrable lasers for diverse applications, overcoming limitations of current semiconductor technologies.

Area of Science:

  • Nanotechnology
  • Optoelectronics
  • Materials Science

Background:

  • Semiconductor lasers are crucial for modern technologies but fabrication is costly and limits integration.
  • Alternative materials like organic molecules and inorganic nanostructures are explored for cost-effective laser fabrication.
  • Electrically driven lasing remains a challenge for many novel laser materials, especially assembled nanostructures.

Purpose of the Study:

  • To investigate the feasibility of electrically driven lasing in individual nanowires.
  • To explore cadmium sulfide (CdS) nanowires as potential components for future laser technologies.
  • To overcome the limitations of current semiconductor laser fabrication methods.

Main Methods:

  • Fabrication and characterization of single-crystal cadmium sulfide nanowires.

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  • Optical and electrical measurements to assess lasing properties.
  • Analysis of Fabry-Perot optical cavity behavior and lasing thresholds.

    • Main Results:

    • Cadmium sulfide nanowires function as effective Fabry-Perot optical cavities.
    • Lasing threshold was observed in nanowires under optical and electrical pumping.
    • Mode spacing was found to be inversely proportional to nanowire length.

    Conclusions:

    • Individual nanowires can achieve electrically driven lasing.
    • Nanowire lasers offer a promising route for low-cost, integrable laser arrays.
    • This technology could enhance existing applications and enable new opportunities in optoelectronics.