Optical emission from single, charge-tunable quantum rings
| Autor: | F Bickel, Khaled Karrai, Jorge M. Garcia, D. Haft, Winston V. Schoenfeld, C. Schäflein, R. J. Warburton, Pierre Petroff, Axel Lorke |
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| Rok vydání: | 2001 |
| Předmět: |
Physics
Photoluminescence Quantum dots Tunneling business.industry Exciton Electron Physik (inkl. Astronomie) Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Condensed Matter::Materials Science Semiconductor Quantum dot Quantum dot laser Atomic physics business Quantum Quantum tunnelling |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 1386-9477 |
| DOI: | 10.1016/s1386-9477(00)00186-7 |
| Popis: | 7 páginas, 5 figuras. We have succeeded in preparing excitons with a specific charge in single semiconductor quantum rings. Buried InAs quantum rings are loaded with electrons from a reservoir through a tunneling barrier and an additional electron–hole pair is generated by optical excitation. Single rings are addressed with nano-optical techniques. We observe abrupt shifts in the emission energy as electrons are added one by one. Furthermore, the experiments provide unique insights into the interaction of electrons in semiconductor nano-islands with their environment. We would like to thank J.P. Kotthaus for stimulating discussions. This work was funded by the DFG (Project SFB 348) and by QUEST, a NSF Science and Technology Center. |
| Databáze: | OpenAIRE |
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