Borri, Paola  ORCID: https://orcid.org/0000-0002-7873-3314, Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, Woggon, U., Schwab, M., Bayer, M., Fafard, S., Wasilewski, Z. and Hawrylak, P.
2003.
Exciton dephasing in quantum dot molecules.
Physical Review Letters (PRL)
91
(26)
, 267401.
10.1103/PhysRevLett.91.267401
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Official URL: http://link.aps.org/doi/10.1103/PhysRevLett.91.267...
Abstract
We have measured the exciton dephasing time in InAs=GaAs quantum dot molecules having different interdot barrier thicknesses in the temperature range from 5 to 60 K, using a highly sensitive four-wave mixing heterodyne technique. At 5 K dephasing times of several hundred picoseconds are found. Moreover, a systematic dependence of the dephasing dynamics on the barrier thickness is observed. These results show how the quantum-mechanical coupling of the electronic wave functions in the molecules affects both the exciton radiative lifetime and the exciton-acoustic phonon interaction.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Biosciences Schools > Physics and Astronomy |
| Subjects: | Q Science > QC Physics |
| Publisher: | American Physical Society |
| ISSN: | 0031-9007 |
| Last Modified: | 09 May 2023 23:04 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/1543 |
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