Journal article
Homogeneous linewidth of self-assembled III-V quantum dots observed in single-dot photoluminescence
We report photoluminescence emission from single self-assembled InAlGaAs quantum dots, which is broadened purely by dephasing processes. We observe linewidths as low as 6+/-3@meV at 10K, which agrees with the homogeneous linewidth derived from four-wave mixing experiments. By selecting dots that are not affected by local field fluctuations and using high-energy excitation, we avoid additional sources of linewidth broadening typically present in single-dot photoluminescence spectra.
We observe a strong LO-phonon coupling in InAlGaAs and InGaAs dots, which becomes the dominating contribution to the linewidth above 50K.
Language: | English |
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Year: | 2003 |
Pages: | 1-6 |
ISSN: | 18731759 and 13869477 |
Types: | Journal article |
DOI: | 10.1016/S1386-9477(02)00698-7 |
ORCIDs: | Hvam, Jørn Märcher |