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We demonstrated a reciprocal planar chiral metamaterials in the THz spectral regime exhibiting asymmetric electromagnetic transmission in opposite propagation directions for circular polarization. We also measured dichroism for counter propagating linear polarized light, which is identical with measured dichroism from its mirror image.
We present the results of theoretical and experimental investigations for different types of chiral and achiral frequency selective polarization converters designed for sub-THz band. The converters are implemented as planar bilayer metastructures and exhibit good performance versus alternative polarization converting devices.
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