Borri, Paola  ORCID: https://orcid.org/0000-0002-7873-3314, Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Schneider, S., Woggon, U., Sellin, R. L., Ouyang, D. and Bimberg, D.
2003.
Dephasing of biexcitons in InGaAs quantum dots.
physica status solidi (b)
238
(3)
, pp. 593-600.
10.1002/pssb.200303177
|
Abstract
We present measurements of the dephasing time of biexcitonic transitions in self-organized InGaAs quantum dots in the temperature range from 10 K to 70 K. We use an heterodyne four-wave mixing technique that allows direct measurement of the dephasing time in an inhomogeneously broadened quantum-dot ensemble. By applying an electrical injection, we progressively increase the number of carriers in the quantum dots and investigate the passage from a four-wave mixing response dominated by the one-exciton transition to a response dominated by biexcitonic and multiexcitonic transitions. The temperature dependence of the homogeneous broadening of the biexciton-to-exciton transition is extrapolated to zero injection current and its physical origin in terms of radiative recombination and phonon interactions is discussed.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Biosciences Schools > Physics and Astronomy |
| Subjects: | Q Science > QC Physics |
| Publisher: | Wiley-Blackwell |
| ISSN: | 0370-1972 |
| Last Modified: | 10 Jul 2024 19:18 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/48858 |
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