Superfluorescence from dense electron-hole plasmas in high magnetic fields

  • Belyanin A
  • Jho Y
  • Wang X
 et al. 
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Cooperative spontaneous recombination (superfluorescence) of electron-hole plasmas in semiconductors
has been a challenge to observe due to ultrafast decoherence. We argue that superfluorescence can be
achieved in quantum-confined semiconductor systems and present experimental evidence for
superfluorescence from high-density photoexcited electronhole plasmas in magnetized quantum wells.
At a critical magnetic field strength and excitation fluence, we observe a clear transition in the
band-edge photoluminescence from omnidirectional output to a randomly directed but highly collimated
beam. Changes in the linewidth, carrier density, and magnetic field scaling of the emission spectra
correlate precisely with the onset of random directionality and are consistent with cooperative

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  • A. Belyanin

  • Y. D. Jho

  • X. Wang

  • J. Kono

  • D. H. Reitze

  • X. Wei

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