Applied Physics Letters · 1996 · 224 citations · 0 references
Natural SciencesMaterials ScienceCondensed Matter PhysicsSemiconductor MaterialsSpectroscopyElectronic Band StructureElectronic Excited StatesElectronic Structure Of SolidsNanostructured Electronic MaterialsOptical Properties Of SemiconductorsSemiconductor PhysicsElectronic Structure AnalysisExcited Electronic StatesExcited StatesExcitonic EffectsOptical TransitionsPhotoluminescencePhotoluminescence SpectroscopySemiconductor Quantum Dots
In photoluminescence spectra of nanometer-scale pyramidal-shaped InAs/GaAs quantum dots allowed optical transitions involving excited hole states are revealed in addition to the ground state transition. Detailed theoretical calculations of the electronic structure, including strain, piezoelectric and excitonic effects, agree with the experimental data and lead to unambiguous assignment of the transitions.