| Zugriffsnummer | 22246 |
| Dokumenttyp | Konferenzartikel in Zeitschrift |
| Sprache | Englisch |
| Titel | Resonant optical excitation and intermixing in InAs/AlAs single quantum dots |
| Autor(in); Institution |
Sarkar, D.; Universidad Autonoma de Madrid, Departamento Física de Materiales, Madrid, SPAIN
Calleja, J. M.; Universidad Autonoma de Madrid, Departamento Física de Materiales, Madrid, SPAIN
Meulen, H. P. van der; Universidad Autonoma de Madrid, Departamento Física de Materiales, Madrid, SPAIN
Meyer, J. M.; Leibniz Universität Hannover, Institut für Festkörperphysik, Hannover, GERMANY
Haug, R. J.; Leibniz Universität Hannover, Institut für Festkörperphysik, Hannover, GERMANY
Pierz, Klaus; 2.5, Halbleiterphysik und Magnetismus, PTB-Braunschweig
|
| Quelle/Jahr | Physica E: 40 (2008), 6, 2172 - 2175 |
| ISSN | 1386-9477 |
| DOI | |
| Verlag | Amsterdam [u.a.]: Elsevier, North-Holland |
| Konferenzangaben | 13th International Conference on Modulated Semiconductor Structures, MSS-13, Genova, 15-20, July, 2007, Italy |
| Klassifikationscode | PACS: 78.67.Hc ; PACS: 63.22.+m |
| Freie Schlagworte | Photoluminescence ; Quantum dots ; Phonons |
| Zusammenfassung | The optical excitation spectra of single self-organized InAs/AlAs quantum dots reveal transitions to excited states involving quantum dot phonons. Resonant excitation is observed at 31 and 41 meV, corresponding to the “InAs-like” and “AlAs-like” optical phonons of InAlAs with low Al concentration. Polarization-resolved measurements reveal separate resonances at the fine structure split exciton levels. The present results demonstrate that both LO phonons in a mixed quantum dot can contribute to the relaxation of excited states and represent a direct measurement of the intermixing in a single quantum dot. |
