Femtosecond Coherent Dynamics of the Fermi-Edge Singularity and Exciton Hybrid

Academic Article


  • We study theoretically the coherent nonlinear optical response of doped quantum wells with several subbands. When the Fermi energy approaches the exciton level of an upper subband, the absorption spectrum acquires a characteristic double-peak shape originating from the interference between the Fermi-edge singularity and the exciton resonance. We demonstrate that, for off-resonant pump excitation, the pump-probe spectrum undergoes a striking transformation, with a time-dependent exchange of oscillator strength between the Fermi-edge singularity and exciton peaks. This effect originates from the many-body electron-hole correlations which determine the dynamical response of the Fermi sea. © 2000 The American Physical Society.
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    Author List

  • Shahbazyan TV; Primozich N; Perakis IE; Chemla DS
  • Start Page

  • 2006
  • End Page

  • 2009
  • Volume

  • 84
  • Issue

  • 9