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Suppressed Relaxation in InGaAs/GaAs Quantum Dots

✍ Scribed by H. Born; R. Heitz; A. Hoffmann; F. Guffarth; D. Bimberg

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
89 KB
Volume
224
Category
Article
ISSN
0370-1972

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✦ Synopsis

Suppressed relaxation in strongly confined InGaAs/GaAs quantum dots (QDs) was investigated by resonantly excited time-resolved photoluminescence spectroscopy. Hot exciton recombination and temperature-dependent relaxation are demonstrated supporting multi-phonon processes to dominate the relaxation between low-lying states at low excitation densities.

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The influence of local charge separation in self-organized In(Ga)As/GaAs quantum dots (QDs) on the exciton dynamics under resonant excitation of the confined exciton in the first excited state is investigated by time-resolved photoluminescence spectroscopy. The oscillator strength and the relaxation