| Autor: |
Yuan, Z, Foo, E, Ryan, J, Mowbray, D, Skolnick, MS, Hopkinson, M |
| Rok vydání: |
2001 |
| Předmět: |
|
| Zdroj: |
PROCEEDINGS OF THE 25TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, PTS I AND II 25th International Conference on the Physics of Semiconductors (ICPS25). 87 |
| ISSN: |
0930-8989 |
| Popis: |
Strong many-body effects have been observed in time-resolved photoluminescence spectroscopy of self-organized InAs/GaAs quantum dots. Our results show that the effects generate considerable bandgap renormalization, being 28 meV at a dot occupancy of similar to 20 electron-hole pairs for the lowest transition. It is also found that many-particle state scattering gives rise to a large homogeneous broadening of the photoluminescence peak, from which we estimate the intradot relaxation time to be 300 fs. It is determined by direct time-resolved measurements that the electron intradot relaxation time is no longer than 1.5 ps. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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