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Dephasing of excitons in CdTe self-organized quantum dots

✍ Scribed by T. Kishimoto; F. Minami; S. Kuroda; K. Takita

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
212 KB
Volume
40
Category
Article
ISSN
1386-9477

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✦ Synopsis

Four-wave mixing (FWM) technique is used to study the phonon induced dephasing of the excitons in CdTe self-assembled quantum dots. The FWM signals show two different decay structures with fast and slow decay components, indicating a non-Lorentzian lineshape with a zero-phonon line and a broadband from exciton-acoustic phonon interaction in the spectral region. The dephasing of the zero-phonon line and the sideband components both show non-linear characteristics with respect to temperature. The experimental data are reproduced well by a theoretical model taking into account the carrier-acoustic phonon coupling.

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