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Related Experiment Videos

Stimulated secondary emission from semiconductor microcavities.

J Erland1, V Mizeikis, W Langbein

  • 1Research Center COM, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.

Physical Review Letters
|June 21, 2001
PubMed
Summary

Final-state stimulation strongly influences light emission dynamics in semiconductor microcavities. This control is achieved by injecting polaritons below a saturation density, revealing a significant bosonic enhancement factor.

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Area of Science:

  • Condensed Matter Physics
  • Quantum Optics
  • Semiconductor Nanostructures

Background:

  • Semiconductor microcavities exhibit unique light-matter interactions.
  • Pulsed excitation enables probing ultrafast dynamics.
  • Polariton-polariton scattering is crucial for understanding quantum phenomena.

Purpose of the Study:

  • Investigate the impact of final-state stimulation on time-resolved light emission.
  • Explore the control of polariton dynamics via injection of final-state polaritons.
  • Quantify the bosonic enhancement factor in these dynamics.

Main Methods:

  • Time-resolved photoluminescence spectroscopy.
  • Pulsed optical excitation of semiconductor microcavities.
  • Angle-resolved detection of emitted light.

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Main Results:

  • Strong influence of final-state stimulation on light emission dynamics observed.
  • Polariton dynamics controlled by injecting final-state polaritons below 5x10^8 cm^-2.
  • Bosonic enhancement factor up to 700 evaluated.

Conclusions:

  • Final-state stimulation offers a viable method for controlling polariton dynamics.
  • The observed bosonic enhancement highlights quantum effects in the system.
  • Results provide insights into coherent control of light in quantum systems.