Electronic quantum dot states induced through photon emission

C. Schulhauser, A. Högele, R. J. Warburton, A. O. Govorov, K. Karrai, J. M. Garcia, B. D. Gerardot, P. M. Petroff

Research output: Contribution to journalLiterature review

Abstract

We review the optics of negatively charged excitons in self assembled InAs/GaAs quantum dots. The charging state of a quantum dot was tuned electrostatically in a field effect structure. We investigated in this way the neutral exciton as well as the negatively singly, doubly and triply charged excitons, namely the X0, X1-, X2- and X 3- excitons. A Zeeman splitting and a diamagnetic shift in the photoluminescence emission line is clearly observed for X0, X 1- and X2- exciton as a function of magnetic field. In contrast the triply negatively charged exciton shows a completely different magnetic behaviour. Here, under the influence of a high magnetic field, the quantum dot electronic states are found to be hybridized with the continuum of states in the wetting layer. Such a hybridization turns out to be induced by photon emission of the X3- exciton. © 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original languageEnglish
Pages (from-to)2079-2093
Number of pages15
JournalPhysica Status Solidi C - Current Topics in Solid State Physics
Volume1
Issue number8
DOIs
Publication statusPublished - 2004

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