Femtosecond dynamics of inter-Landau level excitations of a two-dimensional electron gas in the quantum Hall regime

We use degenerate four-wave mixing to investigate the dynamics of electron–hole pairs interacting with magnetoplasmon excitations of a two-dimensional electron gas (2DEG) in the quantum Hall effect regime. We observe a strong coupling between Landau levels induced by the magnetoplasmon interactions,...

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Bibliographic Details
Published in:Physica. E, Low-dimensional systems & nanostructures Low-dimensional systems & nanostructures, 2002, Vol.12 (1), p.550-553
Main Authors: Fromer, N.A, Schüller, C, Chemla, D.S, Shahbazyan, T.V, Perakis, I.E, Driscoll, D, Gossard, A.C
Format: Article
Language:English
Subjects:
Coherent spectroscopy
Quantum wells
Two-dimensional electron gas
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Summary:We use degenerate four-wave mixing to investigate the dynamics of electron–hole pairs interacting with magnetoplasmon excitations of a two-dimensional electron gas (2DEG) in the quantum Hall effect regime. We observe a strong coupling between Landau levels induced by the magnetoplasmon interactions, leading to a transfer of our signal strength to the lowest Landau level, as well as strong non-Markovian effects. These observations are interpreted within a model taking into account the many body Hamiltonian for the 2DEG system.
ISSN:1386-9477
1873-1759
DOI:10.1016/S1386-9477(01)00486-6