Metastructure surface integrated with three-dimensional convex top layer structure

Abstract

The invention discloses a metasurface integrated with a three-dimensional protruding top layer structure, and belongs to the technical field of terahertz wave band metamaterials and metasurfaces. The metasurface structure unit of the metal hemisphere comprises a metal back electrode, a dielectric layer and a three-dimensional metal hemisphere structure layer which are arranged in sequence, and the dielectric layer is composed of a plurality of metal hemispheres by using a flexible material hemisphere unit structure. The three-dimensional metal hemisphere structure has good isotropy and has the characteristic that the three-dimensional metal hemisphere structure is insensitive to an incident plane wave angle in a terahertz wave band. And further in combination with the idea of communication modulation coding, a coding matrix is realized by combining and designing metamaterial unit arrays with different sizes, the RCS is effectively reduced, and effective regulation and control of the terahertz wave beam are realized. In the vicinity of 0.96 THz and 1.5 THz, two metal hemispherical top-layer metasurface surfaces can have good insensitive characteristics to an incident angle within an electromagnetic wave incident angle of 60 degrees, and terahertz waves can be effectively regulated and controlled.

Description

technical field [0001] The invention relates to a metasurface integrating a three-dimensional raised top layer structure, and belongs to the technical field of terahertz band metamaterials and metasurfaces. Background technique [0002] Metamaterials are subwavelength artificial electromagnetic materials that can be described by equivalent dielectric parameters such as permittivity and permeability. Metamaterials have many special properties, such as negative refractive index, perfect imaging, invisibility cloak, etc., which can realize electromagnetic wave modulation. Its corresponding two-dimensional planar structure is called a metasurface. Because the metasurface is relatively simple to manufacture, the structure is generally not too complicated, and its good ability to regulate electromagnetic waves has recently attracted a lot of research. In the terahertz band, the metasurface has become In addition to regulating electromagnetic waves is a very important device, it h...

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Problems solved by technology

[0004] The object of the present invention is to provide a metasurface with an integrated three-dimensional convex top layer structure, a metasurface with an integrated three-dimensional convex top layer structure with excellent beam isotropy control characteristics at terahertz, using the metasurface for electromagnetic waves Excellent control ability, on the basis of the two-dimensional structure, design a hemispherical metal three-dimensional convex unit structure, and form a metasurface array structure, and verify that it has good isotropy, which can effectively solve the problems existing in the above background technology The key components of terahertz communication have strict requirements on electromagnetic wave conditions, the difficulty of terahertz wave regulation and other technical problems that cannot meet the development needs of modern communication technology

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