Exciton-light interaction in three-dimensional microcavities

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 th e reference planar cavity and a radiative splitting of exciton states coupl ed to cavity modes with different symmetries is found. In the case of zero- dimensional excitations, the conditions for achieving the strong-coupling r egime are determined. For InAs quantum dots the oscillator strength is too low to yield a vacuum-field Rabi splitting, while excitons bound to monolay er fluctuations in quantum wells behave as quantum dots with a large oscill ator strength and can more easily be in the strong-coupling regime.