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Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Optically induced charging effects in self-assembled GaSb/GaAs quantum dots
AU - Hayne, M
AU - Razinkova, O
AU - Bersier, S
AU - Heitz, R
AU - Muller-Kirsch, L
AU - Geller, M
AU - Bimberg, D
AU - Moshchalkov, V V
PY - 2004/8/10
Y1 - 2004/8/10
N2 - 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.
AB - 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.
KW - CHEMICAL VAPOR-DEPOSITION
KW - EPITAXY
KW - HETEROSTRUCTURES
KW - LUMINESCENCE
KW - SPECTROSCOPY
KW - LOCALIZATION
KW - GASB
U2 - 10.1103/PhysRevB.70.081302
DO - 10.1103/PhysRevB.70.081302
M3 - Journal article
VL - 70
JO - Physical review B
JF - Physical review B
SN - 1550-235X
IS - 8
M1 - 081302
ER -