  The robust effect of curvature on spin polarization is reported in a
three-terminal bridge system where the bridging material is subjected to Rashba
spin-orbit interaction. The results are examined considering two different
geometric configurations, ring- and linear-like, of the material which is
coupled to one input and two output leads. Our results exhibit absolute zero
spin polarization for the linear sample, while finite polarization is obtained
in output leads for the ring-like sample.
