  We report on the realization of polariton quantum boxes in a semiconductor
microcavity under strong coupling regime. The quantum boxes consist of mesas
that confine the cavity photon, etched on top of the spacer of a microcavity.
For mesas with sizes of the order of a few micron in width and nm in depth, we
observe quantization, caused by the lateral confinement, of the polariton modes
in several peaks. We evidence the strong exciton-photon coupling regime through
a typical/clear anticrossing curve for each quantized level. Moreover the
growth technique is of high quality, which opens the way for the conception of
new optoelectronic devices.
