Title: Optically induced charging effects in self-assembled GaSb/GaAs quantum dots
Authors: Hayne, Manus ×
Razinkova, O
Bersier, S
Heitz, R
Muller-Kirsch, L
Geller, M
Bimberg, D
Moshchalkov, Victor #
Issue Date: 2004
Series Title: Physical review. B, Condensed matter and materials physics vol:70 issue:8
Conference: date:Katholieke Univ Leuven, Lab Solid State Phys & Magnetism, Pulsed Field Grp, B-3001 Louvain, Belgium; Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany; Katholieke Univ Leuven, Lab Solid State Phys & Magnetism, Nanoscale Superconduct & Magnetism Grp, B-3001 Louvain, Belgium
Abstract: We report photoluminescence (PL) measurements on self-assembled GaSb/GaAs quantum dots. As the laser excitation is increased from very low levels, the PL shows a strong red shift, and then a blue shift, such that it presents a U-shaped curve. Raising the temperature causes a large (<100 meV) blue shift of the PL, and shifts the minimum of the PL energy versus laser excitation curve to higher laser powers. Applying a magnetic field at lasers powers much less than1 W cm(-2) red shifts the PL energy. We explain these effects by population or depopulation of dots that are filled in the dark with holes supplied by carbon acceptors.
ISSN: 1098-0121
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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