| Zugriffsnummer | 19059 |
| Dokumenttyp | Zeitschriftenartikel |
| Sprache | Englisch |
| Titel | Quantum interference currents by excitation of heavy- and light-hole excitons in GaAs/Al0.3Ga0.7As quantum wells |
| Autor(in); Institution |
Bieler, Mark; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Pierz, Klaus; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Siegner, Uwe; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
Dawson, Philip; University of Manchester, School of Physics and Astronomy, Manchester, UK
|
| Quelle/Jahr | Physical Review B: 73 (2006), 241312-1 - 241312-4 |
| ISSN | 1098-0121 |
| DOI | |
| Verlag | Melville, NY: AIP |
| Klassifikationscode | PACS: 72.40.+w ; PACS: 73.21.Fg ; PACS: 78.67.-n ; PACS: 73.61.Ey |
| Zusammenfassung | In this paper we report on the observation of quantum interference currents caused by the excitation of excitons with circularly polarized 150 fs laser pulses at room temperature in GaAs/AlGaAs quantum wells. The quantum interference currents were detected via free-space THz experiments. The importance of the excitonic contribution to the excitation process was revealed by the observation of a phase shift of the current when the excitation photon energy was tuned from the heavy hole to the light hole exciton absorption. We attribute the observed phase shift to a current reversal resulting from optical selection rules for circularly polarized light. |
