  I discuss similitude and differences of spin-orbital effects for electrons in
quantum wells with the Rashba coupling and for polaritons in semiconductor
microcavities with TE-TM splitting. Contrary to the case of electron, the
ground state of polariton in the trap can be non-degenerate and can possess
specific polarization structure. For the case of azimuthally symmetric trap and
sufficiently strong spin-orbital coupling, the ground state is either radial or
azimuthal vortex, depending on the sign of the coupling constant. The effect is
strongly enhanced for polaritons trapped in a ring, where even weak TE-TM
splitting results in formation of vorticity and definite polarization of the
ground state. The Hamiltonian for quasi-1D motion of polaritons in the ring is
derived and it is shown the the dispersion of polaritons depend qualitatively
on the curvature of the ring.
