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Emission from neutral and charged excitons in a single quantum dot in a magnetic field

AuthorsSchulhauser, C.; Warburton, Richard J.; Högele, A.; Govorov, Alexander O.; Karrai, Khaled; García Martínez, Jorge Manuel ; Gerardot, B. D.; Petroff, Pierre M.
Quantum dot
Magnetic properties
Issue DateMar-2004
CitationPhysica E 21(2-4): 184-188 (2004)
AbstractWe report on optical spectroscopy of self-assembled InAs quantum dots in a magnetic field. We describe how we measure the emission characteristics of a single quantum dot (QD) in high magnetic fields at low temperature using a miniature, fiber-based confocal microscope. Example results are presented on a QD whose charge can be controlled using a field-effect device. For the uncharged, singly and doubly charged excitons we find a diamagnetism and the spin Zeeman effect. In contrast, for the triply-charged exciton we find a fundamentally different behavior. Anti-crossings in magnetic field imply that confined states of the QD are hybridized with Landau-like levels associated with the two-dimensional continuum.
Description5 páginas, 5 figuras.-- PACS: 78.67.Hc; 73.40.Rw; 78.66.Fd
Publisher version (URL)http://dx.doi.org/10.1016/j.physe.2003.11.009
Appears in Collections:(IMN-CNM) Artículos
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