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Related Experiment Videos

RETRACTED: An organic solid state injection laser.

J H Schon1, C Kloc, A Dodabalapur

  • 1Bell Laboratories, Lucent Technologies, 600 Mountain Avenue, Murray Hill, NJ 07974-0636, USA.

Science (New York, N.Y.)
|August 1, 2000
PubMed
Summary
This summary is machine-generated.

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We achieved electrically driven amplified spontaneous emission and lasing in tetracene single crystals. High charge carrier mobility and balanced injection enabled efficient exciton generation and reduced absorption for laser action.

Area of Science:

  • Organic electronics
  • Solid-state physics
  • Photonics

Background:

  • Organic semiconductors offer potential for novel electronic and photonic devices.
  • Achieving efficient charge injection and exciton formation is crucial for organic laser applications.
  • Tetracene single crystals exhibit promising optoelectronic properties.

Purpose of the Study:

  • To demonstrate electrically driven amplified spontaneous emission (ASE) and lasing in tetracene single crystals.
  • To investigate the role of charge carrier injection and mobility in device performance.
  • To analyze the spectral narrowing and laser action phenomena.

Main Methods:

  • Fabrication of field-effect devices using tetracene single crystals.
  • Utilizing cleaved crystal edges for Fabry-Perot resonator feedback.

Related Experiment Videos

  • Electrical injection of electrons and holes for optical gain.
  • Spectroscopic analysis of emission properties under varying current densities.

    • Main Results:

    • Electrically driven ASE and lasing were successfully achieved in tetracene single crystals.
    • A threshold current density was identified, above which spectral width decreased significantly due to gain narrowing.
    • Emission spectral width reduced from 120 meV to <1 meV, indicating laser action.
    • High charge carrier mobilities and balanced injection facilitated efficient exciton generation.
    • Charge-induced absorption was minimal in high-quality single crystals.

    Conclusions:

    • Tetracene single crystals are viable materials for electrically pumped organic lasers.
    • Field-effect devices enable efficient charge injection and control for ASE and lasing.
    • High crystal quality minimizes parasitic absorption, enhancing laser performance.