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Competition between carrier recombination and tunneling in quantum dots and rings under the action of electric fields

AuthorsBosch, José; Alén, Benito ; Martínez Pastor, Juan Pascual ; Granados, Daniel ; García Martínez, Jorge Manuel ; González Sotos, Luisa
KeywordsCharged excitons
Single quantum dot
Issue Date2008
CitationSuperlattices and Microstructures 43(5-6): 582-587 (2008)
AbstractIn the presence of a stationary electric field applied in the growth direction tunneling of electrons out of the quantum dots can take place. This mechanism competes with the quantum confined Stark effect (QCSE) that produces an increase of the exciton lifetime by increasing the electric field, mainly due to a net decrease of the electron–hole wavefunction overlap. The electric field range where QCSE dominates over tunneling will be mainly determined by the size of the nanostructure along the vertical direction (height), as demonstrated in this work.
Description6 páginas, 3 figuras.-- Proceedings of the 7th International Conference on Physics of Light-Matter Coupling in Nanostructures.
Publisher version (URL)http://dx.doi.org/10.1016/j.spmi.2007.07.022
Appears in Collections:(IMN-CNM) Artículos
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