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Charged excitons in individual quantum dots: effects of vertical electric fields and optical pump power

AuthorsUrbaszek, B.; McGhee, E. J.; Smith, J. M.; Warburton, Richard J.; Karrai, Khaled; Gerardot, B. D.; García Martínez, Jorge Manuel ; Petroff, Pierre M.
KeywordsQuantum dots
Electric field
Issue DateApr-2003
CitationPhysica E 17: 35-36 (2003)
AbstractWe investigate the influence of optical pump power on a series of charging events of individual quantum dots embedded in a field effect structure. Increasing the optical pump powers moves all charging events towards more negative voltages and charged biexciton states in addition to single exciton states are observed. The linear shift in voltage with pump power is explained by the accumulation of photogenerated holes within the structure.
Description2 páginas, 1 figura.-- PACS: 73.21.La; 78.55.Cr; 78.66.Hc.-- Proceedings of the International Conference on Superlattices, Nano-structures and Nano-devices ICSNN 2002.
Publisher version (URL)http://dx.doi.org/10.1016/S1386-9477(02)00726-9
Appears in Collections:(IMN-CNM) Artículos
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