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          Institute: MPI für Festkörperforschung     Collection: FKF Publikationen 2004     Display Documents



  history
ID: 192938.0, MPI für Festkörperforschung / FKF Publikationen 2004
Electronic and structural properties of interdiffused self-assembled quantum dots from magneto-photoluminescence
Authors:Awirothananon, S.; Sheng, W. D.; Babinski, A.; Studenikin, S.; Raymond, S.; Sachrajda, A.; Potemski, M.; Fafard, S.; Ortner, G.; Bayer, M.
Language:English
Date of Publication (YYYY-MM-DD):2004
Title of Journal:Japanese Journal of Applied Physics
Volume:43
Issue / Number:4B
Start Page:2088
End Page:2092
Review Status:not specified
Audience:Not Specified
Abstract / Description:A set of self-assembled InAs/GaAs quantum dot (QD) samples annealed at
various temperatures for 30 s was studied using
magneto-photoluminescence up to 28T. Blueshifis increasing with
annealing temperature, due to Ga-As interchange at the QD-barrier
interface, are correlated with a reduction in inhomogeneous broadening
and a reduction in inter-sublevel spacing. These new sample properties
allow us to obtain clear crossing patterns closely matched with
Fock-Darwin diagrams where the field applied perpendicular to the QD
plane lifts the state degeneracies. In the limit that in-plane electron
and hole wavefunction extension is the same, the splitting of the
p-shell with magnetic field is inversely proportional to the in-plane
exciton reduced mass. We use this to obtain the evolution of the latter
with intermixing, and compare with predictions of single-particle k * p
calculations.
Free Keywords:quantum dot; magneto-luminescence; interdiffusion; InAs/GaAs;
self-assembled; in-plane effective mass and Ga content
External Publication Status:published
Document Type:Article
Communicated by:Michaela Asen-Palmer
Affiliations:MPI für Festkörperforschung
External Affiliations:Natl Res Council Canada, Inst Microstruct Sci, Ottawa, ON K1A 0R6, Canada.
; Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada.
; MPI, FKF, Grenoble High Magnet Field Lab, Grenoble, France.
; CNRS, Grenoble, France.
; Cyrium Technol, Ottawa, ON, Canada.
; Univ Dortmund, D-44221 Dortmund, Germany.
; Univ Warsaw, Inst Expt Phys, Warsaw, Poland.
Identifiers:ISI:000221510800097 [ID No:1]
ISSN:0021-4922 [ID No:2]
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