Auger type relaxation of excitons in self assembled quantum dots via resonance scattering

I. Larkin; A. Vagov

doi:10.1117/12.513866

11 June 2003 Auger type relaxation of excitons in self assembled quantum dots via resonance scattering

I. Larkin, A. Vagov

Proceedings Volume 5023, 10th International Symposium on Nanostructures: Physics and Technology; (2003) https://doi.org/10.1117/12.513866
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

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.

Citation Download Citation

I. Larkin and 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); https://doi.org/10.1117/12.513866

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