Many-particle effects in type II quantum dots

Mu¨ller-Kirsch, L.; Heitz, R.; Schliwa, A.; Stier, O.; Bimberg, D.; Kirmse, H.; Neumann, W.
March 2001
Applied Physics Letters;3/5/2001, Vol. 78 Issue 10, p1418
Academic Journal
Many-particle effects are investigated in the photoluminescence of type II GaSb/GaAs quantum dots (QDs). With increasing excitation density, i.e., exciton occupation, the photoluminescence shows first a blueshift and then saturates developing a plateau region. The peculiar behavior is attributed to Coulomb charging and state filling of the localized holes to dominate the many-particle regime. A high temperature stability makes the GaSb/GaAs QDs suitable for room-temperature devices. © 2001 American Institute of Physics.


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