| Автор | AbuWaar, Ziad Y |
| Автор | Marega, E |
| Автор | Mortazavi, M |
| Автор | Salamo, G J |
| Дата выпуска | 2008-08-20 |
| dc.description | We present a study of photoluminescence (PL) from uncapped non-oxidized and oxidized InAs quantum dots (QDs) on GaAs substrate as a function of the thickness of a GaAs capping layer. A photoluminescence system in ultra-high vacuum that was coupled onto a molecular beam epitaxy chamber was used in order to avoid the oxidation of the quantum dot surface. We report for the first time a PL emission obtained from uncapped as-grown (non-oxidized) InAs QDs. We also report a dramatic change in the energy position and intensity of the PL as the quantum dots get closer to the top surface of the structure and make a direct comparison between the PL from non-oxidized and oxidized uncapped InAs/GaAs QDs. On the basis of these observations, we offer a physical explanation, based on oxidized versus non-oxidized uncapped QDs, for the discrepancies between previously reported results. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | IOP Publishing Ltd |
| Название | In situ photoluminescence study of uncapped InAs/GaAs quantum dots |
| Тип | paper |
| DOI | 10.1088/0957-4484/19/33/335712 |
| Electronic ISSN | 1361-6528 |
| Print ISSN | 0957-4484 |
| Журнал | Nanotechnology |
| Том | 19 |
| Первая страница | 335712 |
| Последняя страница | 335715 |
| Аффилиация | AbuWaar, Ziad Y; Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA ; Department of Physics, University of Jordan, Amman, 11942, Jordan |
| Аффилиация | Marega, E; Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA ; Departamento de Física e Ciência dos Materiais, Instituto de Física de São Carlos-USP, São Carlos SP 13560-970, Brazil |
| Аффилиация | Mortazavi, M; Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA |
| Аффилиация | Salamo, G J; Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA |
| Выпуск | 33 |
