  Surface plasmon polaritons have attracted varies of interests due to its
special properties, especially in the polarization-controlled devices.
Typically, the polarization-controlled devices include directional coupling,
focusing lens and plasmonic vortex lens, and almost all of them are controlled
by the input circularly polarized light or the linearly polarized light. We
present a novel device that realize the functions of directional coupling and
focusing with high polarization extinction ratio for arbitrary spin of input
light. This device offers opportunities for polarization sensing, polarization
splitting and polarization-multiplexed near-field images and surface plasmon
holography in the future.
