Engineering of Quantum Emitter Properties

Site-controlled Pyramidal QDs are a class of solid state quantum emitters that are photo-lithographically defined on (111)B GaAs, grown through MOVPE inside selectively etched tetrahedral recesses. This system has the unique ability to finely control the nominal thickness of the dots, the barriers and their composition. However, pre-processed QDs rarely satisfy the requirements that are vital for quantum computation applications. That is why post-processing techniques are required. Here we show the strategies our group is currently adopting to increase extraction efficiency, reduce transitions lifetimes and tune FSS of excitons.