Abstract
Structural and optical properties of In x Al 1-x As quantum dots (QD) embedded in an Al 0.30 Ga 0.70 As matrix are studied as a function of InAs mole fraction (x). Decreasing of x results in a sequential disappearance of bound electron and hole states in the QDs. There is a range of indium compositions were photoluminescence is determined by type-II optical transitions between electrons localized in a Al 0.3 Ga 0.7 As layer and holes localized in the QDs.
Original language | English |
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Pages (from-to) | 381-384 |
Number of pages | 4 |
Journal | Applied Surface Science |
Volume | 123-124 |
DOIs | |
Publication status | Published - Jan 1998 |
Externally published | Yes |