| Автор | Pablo Asshoff |
| Автор | Michael Hetterich |
| Автор | Jochen Zimmer |
| Автор | Heiko Füser |
| Автор | Wolfgang Löffler |
| Автор | Heinz Kalt |
| Дата выпуска | 2010-01-01 |
| dc.description | Potential applications of semiconductor quantum dots include spin memory and quantum information processing devices. For these, a rapid spin-initialization process would be desirable. In this contribution, we demonstrate nanosecond-pulsed electrical spin-injection into quantum dots embedded in a spin light-emitting diode. As inferred from time-resolved electroluminescence experiments, the circular polarization degree of the emitted light exhibits a peak at the beginning of the electroluminescence signal, indicating that the spin-initialization is more efficient in pulsed operation than under constant-current excitation. Results for the quantum-dot ensemble, the wetting layer states, and for single quantum dots are presented. We attribute these observations to energy-dependent spin-relaxation processes in the device. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | © 2010 IOP Publishing Ltd |
| Название | Spin-polarization dynamics in electrically excited single InGaAs quantum dots |
| Тип | paper |
| DOI | 10.1088/1742-6596/200/6/062002 |
| Electronic ISSN | 1742-6596 |
| Print ISSN | 1742-6588 |
| Журнал | Journal of Physics: Conference Series |
| Том | 200 |
| Первая страница | 62002 |
| Последняя страница | 62005 |
| Аффилиация | Pablo Asshoff; Institut für Angewandte Physik, Universität Karlsruhe (TH) and DFG Center for Functional Nanostructures (CFN), 76131 Karlsruhe, Germany |
| Аффилиация | Michael Hetterich; Institut für Angewandte Physik, Universität Karlsruhe (TH) and DFG Center for Functional Nanostructures (CFN), 76131 Karlsruhe, Germany |
| Аффилиация | Jochen Zimmer; Institut für Angewandte Physik, Universität Karlsruhe (TH) and DFG Center for Functional Nanostructures (CFN), 76131 Karlsruhe, Germany |
| Аффилиация | Heiko Füser; Institut für Angewandte Physik, Universität Karlsruhe (TH) and DFG Center for Functional Nanostructures (CFN), 76131 Karlsruhe, Germany |
| Аффилиация | Wolfgang Löffler; Institut für Angewandte Physik, Universität Karlsruhe (TH) and DFG Center for Functional Nanostructures (CFN), 76131 Karlsruhe, Germany |
| Аффилиация | Heinz Kalt; Institut für Angewandte Physik, Universität Karlsruhe (TH) and DFG Center for Functional Nanostructures (CFN), 76131 Karlsruhe, Germany |
| Выпуск | 6 |
