期刊
PHYSICAL REVIEW LETTERS
卷 85, 期 16, 页码 3508-3511出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.85.3508
关键词
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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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