  The possibility of integration of two important categories of optical
components, i.e., circular polarizer and lens, into a thin plasmonic
metasurface is examined. After exploring general theoretical formulation,
optimal designs to realize polarizing lenses at mid-infrared frequencies are
presented, for the cases when metal losses cannot be neglected. A
two-dimensional array of Y-shaped nanoantennas with polarization dependent and
spatially varying phase response is the basis for such a unique compact
polarizing lens, whose properties can have a high impact in integrated optics.
