Quantum Dots in Micropillar Cavities

In this thesis the coupling of quantum dots to micropillar cavities is investigated. The interaction of a quantum dot with the cavity mode is described by the Jaynes-Cummings Hamiltonian and the dynamics of the system is found by the use of the density operator formalism where the decay me-chanics are treated by reservoir theory. Then the coupling of quantum dots to micropillar cavities is investigated by measurements of photoluminescence spectra and time-resolved measurements. From the photoluminescence spectra it is seen that both the position of the cavity peak and the quantum dot peaks changes with temperature. As the position of the quantum dot peaks changes faster than the cavity peak it is possible to tune a quantum dot in and out of resonance. At resonance an enhancement of the cavity peak is seen. From the time-resolved measurements the quantum dot decay rate as a function of the detuning to the cavity mode is found. An enhance-ment of the quantum dot decay rate of 2.6 is acheived by tuning the quantum dot into resonance with the cavity mode. 1 Resum