Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1554284 | Superlattices and Microstructures | 2011 | 4 Pages |
InGaAs Quantum Dots embedded in GaAs barriers, grown in inverted tetrahedral recesses of ∼7 μm edge, have showed interesting characteristics in terms of uniformity and spectral narrowness of the emission. In this paper we present a study on the fine structure splitting (FSS). The investigation of about 40 single quantum dots revealed two main points: (1) the values of this parameter are very similar from dot to dot, proving again the uniformity of Pyramidal QD properties, (2) there is a little chance, in the sample investigated, to find a dot with natural zero splitting, but the values found (the mean being ∼13 μeV ) should always guarantee the capability of restoring the degeneracy with some corrective technique (e.g. application of a small magnetic field).