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Exciton Recombination in Self-Assembled InAs/GaAs Small Quantum Dots under an External Electric Field

AuthorsMartínez Pastor, Juan Pascual ; Bosch, José; Biswas, Dipankar; Alén, Benito ; Valdés, J. L.; García Martínez, Jorge Manuel ; González Sotos, Luisa
Issue DateApr-2002
CitationPhysica Status Solidi A 190(2): 599-603 (2002)
AbstractThe effects of an external electric field on the photoluminescence of small self-assembled InAs/GaAs quantum dots (3–4 nm high) have been studied at different temperatures, laser power, and laser wavelength excitation. The shallow nature of the only confined electron level is revealed by the strong photocurrent signal measured at low temperatures. In this QD system, recombination from that electron level with ground and first excited hole states can be observed in high power excited PL and low power excited PL under direct applied bias, when the hole population is high enough under these conditions.
Description5 páginas, 3 figuras.-- PACS: 73.63.Kv; 78.55.Cr; 78.67.Hc; S7.12.-- Trabajo presentado en la 7th International Conference on Optics and Excitons in Confined Systems (OECS7).
Publisher version (URL)http://dx.doi.org/10.1002/1521-396X(200204)190:2<599::AID-PSSA599>3.0.CO;2-H
Appears in Collections:(IMN-CNM) Artículos
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