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Type: Artigo de evento
Title: Micro-photoluminescence Of Self-assembled Quantum Dots In The Presence Of An Electron Gas
Author: Nakaema M.K.K.
Brasil M.J.S.P.
Iikawa F.
Ribeiro E.
Heinzel T.
Ensslin K.
Medeiros-Ribeiro G.
Petroff P.M.
Brum J.A.
Abstract: InGaAs/GaAs self-assembled quantum dots in the presence of a two-dimensional electron gas were studied by micro-photoluminescence. Several sharp optical emission lines attributed to individual quantum dots were observed. These lines exhibit a blue shift and a broadening as the electron gas density is increased. We discuss the origin of the blue shift considering the variation of the built-in electric field in the asymmetric geometry of the dots. The observed broadening of the quantum dot emission lines is an indication of coupling between the two-dimensional electron gas and the electrons in the quantum dot. © 2002 Elsevier Science B.V. All rights reserved.
Rights: fechado
Identifier DOI: 10.1016/S1386-9477(01)00443-X
Date Issue: 2002
Appears in Collections:Unicamp - Artigos e Outros Documentos

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