Decay dynamics of neutral and charged excitonic complexes in single InAs/GaAs quantum dots

Details Decay dynamics of neutral and charged excitonic complexes in single InAs/GaAs quantum dots Decay dynamics of neutral and charged excitonic complexes in single InAs/GaAs quantum dots

2008-02-07

arxiv.org/abs/0802.1010v1

Appl. Phys. Lett. 92, 063116 (2008)

Physics

Condensed Matter

Materials Science

4 pages, 4 figures

Scientific paper

10.1063/1.2844886

Systematic time-resolved measurements on neutral and charged excitonic complexes (X, XX, X+, and XX+) of 26 different single InAs/GaAs quantum dots are reported. The ratios of the decay times are discussed in terms of the number of transition channels determined by the excitonic fine structure and a specific transition time for each channel. The measured ratio for the neutral complexes is 1.7 deviating from the theoretically predicted value of 2. A ratio of 1.5 for the positively charged exciton and biexciton decay time is predicted and exactly matched by the measured ratio indicating identical specific transition times for the transition channels involved.

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