Wave packets in a semiconductor superlattice
Mark L. Biermann and C. R. Stroud, Jr.
Appl. Phys. Lett. 58, 2279 (1991).
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A theoretical study of hole wave packets in a GaAs,
Al0.3Ga0.7As superlattice is presented. Formation of the wave packet by short
laser pulse excitation and the time-dependent nature of the wave packet are
discussed, with particular attention given to the quasi-periodic nature of
the time dependence. Phenomena analogous to those displayed in atomic and
molecular wave packet systems are predicted. The wave packet formalism
provides a powerful tool for studying coherent hole dynamics, including
quantum beat phenomena, and could be useful in determining heavy and light
hole relaxation rates.
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