Metallic helix array as a broadband wave plate

Details Metallic helix array as a broadband wave plate Metallic helix array as a broadband wave plate

2011-05-31

arxiv.org/abs/1105.6263v1

Physics

Optics

Scientific paper

This study proposes that a metallic helix array can operate as a highly-transparent broadband wave plate in propagation directions perpendicular to the axis of helices. The functionality arises from a special property of the helix array, namely that the eigenstates of elliptically right-handed and left-handed polarization are dominated by Bragg scattering and local resonance respectively, and can be modulated separately with nearly fixed difference between their wavevectors in a wide frequency range. The wave plate functionality is theoretically and experimentally demonstrated by the transformation of polarized states in a wide frequency range.

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