Enhanced spontaneous emission from inhomogeneous ensembles of quantum dots is induced by short-range couplings
arXiv:1201.4059 · doi:10.1103/PhysRevB.86.121305
Abstract
We study theoretically the spontaneous emission from an inhomogeneous ensemble of quantum dots in the weak excitation limit. We show that collective, superradiance-like effects lead to an enhanced emission rate in the presence of sufficiently strong coupling between the dots in agreement with experimental observations, which means that the quantum dot sample cannot be treated as an ensemble of individual emitters. We demonstrate also that the collective behavior of the quantum dot system relies on short-range interactions, while long-range dipole couplings are too weak to have any impact on the emission dynamics for a system with a realistic degree of inhomogeneity.
5 pages, 3 figures, moderate modifications
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Cited by in corpus (11)
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- Decay and persistence of spatial coherence during phonon-assisted relaxation in double quantum dots
- Photon-photon correlation statistics in the collective emission from ensembles of self-assembled quantum dots
- Diffusion of excitation and power-law localization in long-range-coupled strongly disordered systems
- Collective spontaneous emission from a system of quantum dots
- Exciton Diffusion in a Quantum Dot Ensemble