Terahertz chiral metasurface

Abstract

The application provides a terahertz chiral metasurface, which comprises at least one first chiral structure unit and at least one second chiral structure unit; the first chiral structure unit and the second chiral structure unit each comprise a substrate material layer, a dielectric layer and a metal pattern layer, the dielectric layer is arranged between the substrate material layer and the metal pattern layer; the metal pattern layer comprises a first transverse strip, a second transverse strip, a third transverse strip, a first longitudinal strip and a second longitudinal strip, the first longitudinal strip is arranged on one side of the upper surface of the dielectric layer; the extension directions of the first transverse strip, the second transverse strip and the third transverse strip in the first chiral structure unit and the second chiral structure unit are opposite; one side of the metal pattern layer serves as an input and output port of a terahertz wave. The scheme is suitable for a terahertz wave band, and the structure based on the first chiral structure unit and the second chiral structure unit makes the terahertz wave band exhibit two opposite response characteristics, and is suitable for encrypted transmission.

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