Motional narrowing of inhomogeneously broadened excitons in a semiconductor microcavity: Semiclassical treatment

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Abstract
The narrowing of the exciton features in the optical spectra of quantum microcavities usually referred to as a motional narrowing is described within a simple semiclassical approach taking into account the exciton inhomogeneous broadening and assuming wave-vector conservation in the plane of the cavity. Good agreement with existing experimental data is achieved. The narrowing of exciton-photon modes in calculated spectra, however, cannot be called “motional” since no in-plane motion or quantization of excitons was assumed in the model.