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Coherent ultrafast dynamics in the quantum Hall effect regime |
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| Authors: | I.E. Perakis D.S. Chemla |
| Affiliation: | a Department of Physics, University of Crete and Foundation for Research and Technology-Hellas, P.O. Box 2208, 710 03 Heraklion, Crete, Greece b Department of Physics, University of California, Berkeley, and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA |
| Abstract: | We review recent investigations of the femtosecond non-linear optical response of the two-dimensional electron gas (2DEG) in the quantum Hall effect regime. We find that the time and frequency profile of the four-wave-mixing non-linear optical spectrum is strongly influenced by Coulomb correlations between the photoexcited electron-hole pairs and the 2DEG collective excitations. We discuss experimental and theoretical results showing non-Markovian memory effects in the polarization dephasing, and an optically induced time-dependent coupling between the two lowest Landau level magnetoexcitons. |
| Keywords: | 71.10.Ca 71.45.&minus d 78.20.Bh 78.47.+p |
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