Abstract
For times much longer than some initial pulsed optical excitation, the scattering of LO phonons and electrons (in the conduction and valence band of a semiconductor) leads to an irreversible decay of the optical polarization. For short times, however, scattering processes are not completed, and thus they have not yet become irreversible. This quantum kinetics regime opens the fascinating possibility of actually reversing or enhancing uncompleted scattering events. This is demonstrated here for the first time to our knowledge.
© 1998 Optical Society of America
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