Final published version, 156 KB, PDF document
Research output: Contribution to journal › Journal article › peer-review
Optically induced charging effects in self-assembled GaSb/GaAs quantum dots. / Hayne, M ; Razinkova, O ; Bersier, S ; Heitz, R ; Muller-Kirsch, L ; Geller, M ; Bimberg, D ; Moshchalkov, V V .
In: Physical review B, Vol. 70, No. 8, 081302, 10.08.2004.Research output: Contribution to journal › Journal article › peer-review
}
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: Condensed Matter and Materials Physics
JF - Physical Review B: Condensed Matter and Materials Physics
SN - 1098-0121
IS - 8
M1 - 081302
ER -