Abstract
Impurity bound magneto-polarons are studied experimentally and theoretically in a strongly-coupled GaAs/AlGaAs superlattice. The 1 s→2 p + transition of well-center donors is tuned through resonance with the GaAs optical phonon mode. An anti-level crossing behavior and three different peaks are clearly observed at the LO-phonon energy. The theoretical analysis shows that the size of the magneto-polaron effects: (1) 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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