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Formation of negatively-charged excitions and charge transfer in quantum dots

✍ Scribed by Y. Shiraki; K. Ohta

Publisher: Elsevier Science
Year: 1999
Tongue: English
Weight: 241 KB
Volume: 47
Category: Article
ISSN: 0167-9317
DOI: 10.1016/s0167-9317(99)00163-x

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✦ Synopsis

Negatively-charged excitons were assigned in AlGaAs/GaAs modulation-doping structures (MOD) with AlInAs quantum.

Peaks observed at zero bias decreased or disappeared with increasing negative bias and new peaks were seen to grow up. These two-group peaks were reasonably assigned respectively as negativelycharged excitons and neutral excitons, since the excess electrons were considered to be extracted from the dot region and formation of negatively-charged excitons was suppressed under high bias.

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