Journal
PHYSICAL REVIEW LETTERS
Volume 85, Issue 16, Pages 3508-3511Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.3508
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We predict a carrier-density dependent oscillation, which is superimposed on the decay of the coherent control photon echo signal of a semiconductor. It reflects the oscillatory transfer of excitation back and forth between electrons and a mixed plasmon-phonon mode. This signature provides obvious and unique evidence for the finite duration of the interaction process, i.e., evidence for the collective Coulomb quantum kinetics. The theoretical predictions for the model semiconductor GaAs are reproduced in corresponding experiments.
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