Multifunctional integrated reflection-transmission integrated electromagnetic coding meta-material

Abstract

The invention discloses a multifunctional integrated reflection-transmission integrated electromagnetic coding meta-material. The reflection-transmission integrated electromagnetic coding meta-material is composed of a meta-material unit with multi-layer stack structure; the meta-material unit is formed by alternately arranging five layers of metal and four layers of medium; the specific structuredesign enables the meta-material unit to possess anisotropy and asymmetrical characteristic, and the unit can present different transmission and reflection phases under the irradiation of x and y-polarized electromagnetic waves from different incidence directions, thereby respectively and independently controlling reflection and transmission wavefront to realize the full-space regulation on the electromagnetic wave; the transmission wavefront is regulated when the meta-material is worked in the transmission mode under the irradiation of the x-polarized incidence wave along the +/- z direction; and the meta-material is worked at the reflection mode under the irradiation of the y-polarized incidence wave along the +/- z direction, thereby independently controlling the reflection wavefront at two sides. By changing the polarization and direction of the incidence wave, one coding meta-material can be used for realizing three different functions, such as beam deflection, diffuse scatteringand vortex wave generation. The coding meta-material disclosed by the invention is simple in structure, easy to process, and can be used for designing various high-performance devices.

Description

technical field [0001] The invention belongs to the field of novel artificial electromagnetic materials, and in particular relates to a multi-functional integrated reflection-transmission integrated electromagnetic coding metamaterial. Background technique [0002] New artificial electromagnetic materials, also known as electromagnetic metamaterials (Metamaterials), are an artificial material composed of macroscopic basic units with specific geometric shapes arranged periodically / aperiodically, or implanted into the body (or surface) of the matrix material. . In the past 20 years, electromagnetic metamaterials have developed rapidly, resulting in many interesting physical phenomena and novel devices. The difference between electromagnetic metamaterials and traditional materials is that the original microscopic units (atoms or molecules) are replaced by macroscopic units. In recent years, in order to reduce the thickness and structural complexity of three-dimensional metama...

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Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to solve the multi-functional limitation of existing passive metamaterials. By designing anisotropic and asymmetric metamaterial units, the reflected and transmitted wavefronts can be regulated simultaneously.

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