  Macroscopic wave packets of spin-polarized exciton-polaritons in
two-dimensional microcavities experience the zitterbewegung, the effect
manifested by the appearance of the oscillatory motion of polaritons in the
direction normal to the initial propagation direction. The oscillating
trajectories of exciton-polaritons are adjustable by the control parameters:
the splitting of the longitudinal and transverse exciton-polariton modes, the
wave vector and the width of the resonant cw pump. Our theoretical analysis
supported by the numerical calculations allowed to optimize values of the
control parameters suitable for a direct experimental observation of the
zitterbewegung effect.
