A gold-coated carbon helix over a nanoscale aperture transmits one circular polarization and blocks the other, with measured differential transmission above 0.96 across 1.47 to 1.65 micrometers.
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Individual plasmonic helix for probing light chirality
A gold-coated carbon helix over a nanoscale aperture transmits one circular polarization and blocks the other, with measured differential transmission above 0.96 across 1.47 to 1.65 micrometers.