Regensburg 2004 – wissenschaftliches Programm

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HL: Halbleiterphysik

HL 50: Quantenpunkte und -dr
ähte: Optische Eigenschaften III

HL 50.10: Vortrag

Freitag, 12. März 2004, 13:15–13:30, H14

Wavelength selective carrier storage in self-organized quantum dots — •Till Warming¹, F. Guffarth¹, R. Heitz¹, M. Geller¹, P. Brunkov², V.M. Ustinov², and D. Bimberg¹ — ¹Institut für Festkörperphysik, Technische Universität Berlin, — ²A.F.Ioffe Physico-Technical Institute RAS, 194021 St-Petersburg, Russia

Wavelength selective carrier storage in self-organized InAs/GaAs quantum dots (QDs) is investigated. The small homogeneous broadening of the exciton transition of a single quantum dot is in high contrast to the large inhomogeneous broadening of the ground state transition energy of an ensemble of self-organized QDs. This benefit enables in addition to the spatially addressing wavelength parallel data storage in future memory devices. Here we analyze the data storage process in two-color photocurrent experiments and investigate the dependencies of the electric field, the temperature and the laser power. This work was funded by the Nanomat project of the European Commission Growth Programme, contract number G5RD-CT-2001- 00545, Intas project 2001-774, and SFB 296 of DFG.