Metallic helix array as a broadband wave plate

Abstract

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.

References in corpus (3)

• Giant gyrotropy due to electromagnetic coupling
• Design of Linear-to-Circular Polarization Transformers Made of Long Densely Packed Metallic Helices
• The Photonic Band theory and the negative refraction experiment of metallic helix metamaterials

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• Self-Assembled Chiral Photonic Crystals From Colloidal Helices Racemate
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• Elimination of polarization degeneracy in circularly symmetric bianisotropic waveguides: a decoupled case
• Metamaterial-based polarization control plate for producing incoherent laser irradiation
• Exploring spatial dispersion in helical wired media: An effective field theory approach