11 June 2003 Auger type relaxation of excitons in self assembled quantum dots via resonance scattering
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Abstract
We have investigated an Auger type mechanism of the relaxation of the carriers onto the deep levels of the self-assembled quantum dots (QD). Our analysis shows that resonant electron-hole collisions can lead to unexpectedly fast energy relaxation. Basic idea of the proposed mechanism is the Breit-Wigner type scattering of a delocalized particle with a particle trapped inside a dot. If energy of an incoming particle is close to the energy of a virtual two-particle state scattering cross-sections resonantly enhanced. We show that the number of resonances is sufficiently large leading to large average cross-sections. Realistic estimations for the In dots in the GaAs matrix shows that energy relaxation takes about 5 - 50 picosecond, which is comparable with experimental findings.
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I. Larkin, I. Larkin, A. Vagov, A. Vagov, } "Auger type relaxation of excitons in self assembled quantum dots via resonance scattering", Proc. SPIE 5023, 10th International Symposium on Nanostructures: Physics and Technology, (11 June 2003); doi: 10.1117/12.513866; https://doi.org/10.1117/12.513866
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