Detecting polarization state of arbitrary polarized light by chiral plasmonic lenses with distributed nanoslits

摘要： We devise three chiral plasmonic lenses (PLs) with distributed nanoslits for detecting the complete state of polarization of an arbitrary polarized light. A double-ring arrayed nanocrosses-based plasmonic lens is proposed to focus the surface plasmon polaritons excited by the two circularly polarized components of the incident light, thus enabling the phase difference between the two components to be retrieved. Two Archimedes-spiral arrayed nanoslits-based PLs with opposite chirality are designed to detect the relative strength of the two components. The focusing properties of the three structures are theoretically derived and numerically investigated, demonstrating the effectiveness of the proposed method.