| Issue |
Europhys. Lett.
Volume 53, Number 1, January 2001
|
|
|---|---|---|
| Page(s) | 59 - 65 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2001-00123-2 | |
| Published online | 01 December 2003 | |
Multi-excitons in self-assembled InAs/GaAs quantum dots: A pseudopotential, many-body approach
National Renewable Energy Laboratory - Golden, CO 80401, USA
Received:
22
February
2000
Accepted:
31
October
2000
We use a many-body, atomistic empirical pseudopotential approach to
predict the multi-exciton emission spectrum of a lens-shaped InAs/GaAs
self-assembled quantum dot. We discuss the effects of i) the direct
Coulomb energies, including the differences of electron and hole
wave functions, ii) the exchange Coulomb energies and
iii) correlation energies given by a configuration interaction calculation.
Emission from the ground state of the N exciton system to the 
exciton system involving 
and 
recombinations are discussed. A comparison with a simpler
single-band, effective mass approach is presented.
PACS: 73.20.Dx – Electron states in low-dimensional structures (superlattices, quantum well structures and multilayers) / 78.66.-w – Optical properties of specific thin films, surfaces, and low-dimensional structures
© EDP Sciences, 2001
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