Miniature polarization analyzer based on surface plasmon polaritons

We investigated a miniature plasmonic polarization analyzer measuring Stokes parameters of a light. The optical component consists of a 2 × 2 polarizer array, three linear polarizers, and one right-handed circular polarizer. These polarizers are formed with bull's eye structures on a metal surface. The measurements of Stokes parameters in a unit radius Poincare sphere were demonstrated. Compact polarization-dependent optical sensing and imaging can be envisioned based on the miniature polarization analyzer.