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Related Experiment Videos

Electrically driven single-cell photonic crystal laser.

Hong-Gyu Park1, Se-Heon Kim, Soon-Hong Kwon

  • 1Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea.

Science (New York, N.Y.)
|September 9, 2004
PubMed
Summary
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Researchers demonstrated a room-temperature, single-mode photonic band gap laser with low threshold current. This wavelength-size device uses electrical current injection via a semiconductor wire, paving the way for advanced quantum applications.

Area of Science:

  • Photonics
  • Condensed Matter Physics
  • Quantum Optics

Background:

  • Photonic band gap (PBG) lasers offer unique light confinement properties.
  • Achieving low threshold currents in PBG lasers is crucial for efficient optical devices.
  • Room-temperature operation is essential for practical applications.

Purpose of the Study:

  • To experimentally demonstrate an electrically driven, single-mode PBG laser operating at room temperature.
  • To investigate the impact of current injection on laser performance and quality factor.
  • To explore the potential of wavelength-size PBG lasers for future quantum technologies.

Main Methods:

  • Fabrication of a sub-micrometer-sized semiconductor wire integrated into a photonic crystal structure.
  • Electrical current pulse injection through the semiconductor wire to achieve lasing.

Related Experiment Videos

  • Characterization of laser output, including mode analysis and threshold current measurement.
  • Comparison of experimental results with computational modeling based on fabricated parameters.

    • Main Results:

    • Successful demonstration of an electrically driven, single-mode PBG laser at room temperature.
    • Achieved a low threshold current of approximately 260 microA.
    • Minimal degradation of the quality factor despite current injection through a sub-micrometer wire.
    • Identified the operating mode as a nondegenerate monopole mode through experimental and computational analysis.

    Conclusions:

    • This work presents a significant step towards thresholdless lasers and single-photon sources.
    • The demonstrated wavelength-size PBG laser is a promising platform for photonic crystals, cavity quantum electrodynamics, and quantum information.
    • Efficient electrical pumping of PBG lasers is achievable with careful structural design and current injection methods.