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Exciton dephasing in quantum dot molecules.

PubMed
Authors: Borri P, Langbein W, Woggon U, Schwab M, Bayer M, Fafard S, Wasilewski Z, Hawrylak P

Year

2003

Paper ID

12953

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

83

Citations

N/A

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.

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  • 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...

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References & Citation Signals

[1] DOI https://doi.org/10.1103/PhysRevLett.91.267401 [2] Publisher https://pubmed.ncbi.nlm.nih.gov/14754087/

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