Coherent control and polarization readout of individual excitonic states

B Patton, U Woggon, W Langbein

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73 Citations (Scopus)


We present measurements and simulations of coherent control and readout of the polarization in individual exciton states. The readout is accomplished by transient four-wave mixing detected by heterodyne spectral interferometry. We observe Rabi oscillations in the polarization, which show half the period of the Rabi oscillations in the population. A decrease of the oscillation amplitude with pulse area is observed, which is not accompanied by a change in the dephasing time. This suggests the transfer of the excitation to other states as the origin of the Rabi-oscillation damping. Detuning of the excitation enables the control of the polarization in phase and amplitude and is in qualitative agreement with simulations for a two-level system. Additionally, simultaneous Rabi flopping of several spatially and energetically close exciton states is demonstrated.
Original languageEnglish
Article number266401
Number of pages4
JournalPhysical Review Letters
Issue number26
Publication statusPublished - 21 Dec 2005


  • coherent control
  • exciton states
  • polarization
  • heterodyne spectral interferometry
  • Rabi oscillations
  • Rabi flopping


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