Abstract
Impurity bound magneto-polarons are studied in bulk and in weakly and strongly-coupled GaAs/AlGaAs superlattices. A variational approach is used to calculate the energy levels of several donor states as function of: (1) the well width, (2) the donor position, and (3) the magnetic field strength. The tunneling of the electron in the adjacent wells of the superlattice is incorporated in our calculation. The 1s → 2p+ transition of shallow donors is tuned through resonance with the GaAs optical phonon mode. The theoretical analysis shows that: (1) the size of the magneto-polaron effects is very close to those for the bulk system, and (2) no direct evidence is found for non bulk LO-phonon interaction.
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