TY - JOUR

T1 - Electron and hole confinement in stacked self-assembled InP quantum dots

AU - Hayne, M

AU - Provoost, Rik

AU - Zundel, Markus K

AU - Manz, Yvonne M

AU - Eberl, Karl

AU - Moshchalkov, Victor V

N1 - © 2000 The American Physical Society

PY - 2000/10/15

Y1 - 2000/10/15

N2 - We report photoluminescence measurements on stacked self-assembled InP quantum dots in magnetic fields up to 50 T. For triply stacked layers the dots become strongly coupled when the layer separation is 4 nm or less. In contrast, doubly stacked layers show no sign of coupling. We explain this puzzling difference in coupling by proposing a model in which the holes are weakly confined in the GaxIn1-xP layers separating the layers of dots, and are responsible for the coupling. Since only one such intervening layer exists in the doubly stacked dots coupling is excluded. Our model is strongly supported by the exciton masses and radii derived from our experimental results, and is consistent with available theory.

AB - We report photoluminescence measurements on stacked self-assembled InP quantum dots in magnetic fields up to 50 T. For triply stacked layers the dots become strongly coupled when the layer separation is 4 nm or less. In contrast, doubly stacked layers show no sign of coupling. We explain this puzzling difference in coupling by proposing a model in which the holes are weakly confined in the GaxIn1-xP layers separating the layers of dots, and are responsible for the coupling. Since only one such intervening layer exists in the doubly stacked dots coupling is excluded. Our model is strongly supported by the exciton masses and radii derived from our experimental results, and is consistent with available theory.

KW - MAGNETOLUMINESCENCE

U2 - 10.1103/PhysRevB.62.10324

DO - 10.1103/PhysRevB.62.10324

M3 - Journal article

VL - 62

SP - 10324

EP - 10328

JO - Physical review B

JF - Physical review B

SN - 1550-235X

IS - 15

ER -