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 - Magneto-photoluminescence of stacked self-assembled InAs/GaAs quantum dots
AU - Maes, J
AU - Hayne, M
AU - Henini, M
AU - Pulizzi, F
AU - Patane, A
AU - Eaves, L
AU - Moshchalkov, V V
PY - 2004/4/30
Y1 - 2004/4/30
N2 - We studied ten-fold stacked layers of self-assembled InAs/GaAs quantum dots by photoluminescence in pulsed magnetic fields. When the interlayer distance is reduced from 9.8 to 5.5 nm, a doubling of the diamagnetic shift for a magnetic field perpendicular to the [0 0 1] direction reveals the onset of electron coupling between the dots in the stack. On reducing the interlayer distance to 3.1 nm, a lower exciton effective mass is seen in addition to the coupling. For such a close stacking, the strain field in and around the dot is completely different from that of a single-layered structure. In particular, the strain inside the InAs dots in the stack is partially relaxed, causing the observed effect. (C) 2004 Elsevier B.V. All rights reserved.
AB - We studied ten-fold stacked layers of self-assembled InAs/GaAs quantum dots by photoluminescence in pulsed magnetic fields. When the interlayer distance is reduced from 9.8 to 5.5 nm, a doubling of the diamagnetic shift for a magnetic field perpendicular to the [0 0 1] direction reveals the onset of electron coupling between the dots in the stack. On reducing the interlayer distance to 3.1 nm, a lower exciton effective mass is seen in addition to the coupling. For such a close stacking, the strain field in and around the dot is completely different from that of a single-layered structure. In particular, the strain inside the InAs dots in the stack is partially relaxed, causing the observed effect. (C) 2004 Elsevier B.V. All rights reserved.
KW - self-assembled quantum dots
KW - InAs
KW - pulsed magnetic fields
KW - GROWTH
KW - LAYERS
U2 - 10.1016/j.physb.2004.01.120
DO - 10.1016/j.physb.2004.01.120
M3 - Journal article
VL - 346-347
SP - 428
EP - 431
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
SN - 0921-4526
ER -