Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9671860 | Microelectronics Journal | 2005 | 4 Pages |
Abstract
This paper presents the investigation of photoluminescence (PL), connected with ground (GS) and four excited states (1-4-ES) in highly uniform self-assembled InAs quantum dots (QDs) embedded into the In0.15Ga0.8As layers, using variable pumping power (P) in the range 10-1000Â W/cm2 at the temperature 12Â K. The peak positions of GS and ES emission bands depend on an excitation light power. The energy differences between GS and 1-4ES optical transitions are not equidistant and equal to 48.8, 46.5, 40.3 and 33.4Â meV, respectively, at highest power level. It was shown that many-particle effects in such high populated QDs is essential and the exchange/correlation and direct Coulomb contributions do not vanish in the investigated strong confined QDs.
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Authors
T.V. Torchynska, H.M. Alfaro Lopez, J.L. Casas Espinola, P.G. Eliseev, A. Stintz, K.J. Malloy, R. Pena Sierra, Eu. Shcherbina,