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Propagation of light through a thin flat metallic screen containing a hole oftwisted shape is sensitive to whether the incident wave is left or rightcircularly polarized. The transmitted light accrues a component with handednessopposite to the incident wave. The efficiency of polarization conversiondepends on the mutual direction of the hole's twist and the incident light'swave polarization handedness and peaks at a wavelength close to the holeoverall size. We also observed a strong transmitted field concentration at thecenter of the chiral hole when the handedness of the chiral hole and the wave'spolarization state are the same.Comment: 3 pages, 3 figure

Polarization conversion and “focusing” of light propagating through a small chiral hole in a metallic screen