Efficient single photon sources, such as semiconductor quantum dots in micro-cavities, attracted attention not only for their fundamental properties, but also for wide use as resources of qubits...Show moreEfficient single photon sources, such as semiconductor quantum dots in micro-cavities, attracted attention not only for their fundamental properties, but also for wide use as resources of qubits for quantum communication and quantum computing. In this thesis, we study and optically characterize a device with QDs embedded in micro-cavities. By fitting the semi-classical model which describes QD-cavity interaction, we conclude that we observe trion transitions. A study of the second-order correlation function of one transition shows that it works as efficient single-photon source.Show less