Abstract
A theoretical description of the interaction between confined excitons and photonic modes in pillar microcavities is given. For quantum-well excitons in the strong coupling regime, the Rabi splitting is reduced compared to the reference planar cavity and a radiative splitting of exciton states coupled to cavity modes with different symmetries is found. In the case of zero-dimensional excitations, the conditions for achieving the strong-coupling regime are determined. For InAs quantum dots the oscillator strength is too low to yield a vacuum-field Rabi splitting, while excitons bound to monolayer fluctuations in quantum wells behave as quantum dots with a large oscillator strength and can more easily be in the strong-coupling regime.
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