Metamaterial capable of diverging electromagnetic waves

Abstract

The invention relates to a metamaterial capable of diverging electromagnetic waves. The metamaterial comprises an anisotropic metamaterial panel with a diverging function, the metamaterial panel comprises two areas, at least one area includes at least two portions, an intersecting line of the two areas serves as a demarcation line, reflective indexes of the portions of each area gradually change from small to large with the change of distance away from the demarcation line from near to far, the reflective indexes at the junction positions of the portions discontinuously change, reflective index change ranges of the portions are intersected and non-null, the metamaterial panel is formed by stacking at least one piece of metamaterial slice layer, the metamaterial slice layer comprises a slice-shaped substrate and a plurality of artificial microstructures adhering to the substrate, each artificial microstructure is in a non-90-degree rotational symmetrical structure, an extraordinary light optical axis of an index ellipsoid of each artificial microstructure is not perpendicular and not parallel to a transmission direction of an incident electromagnetic wave, and the size of the artificial microstructure of the metamaterial is merely required to change in a small range so as to achieve the diverging effect.

Description

technical field [0001] The invention relates to a metamaterial, in particular to an anisotropic metamaterial with electromagnetic wave divergence function. Background technique [0002] As a material design concept and research frontier, metamaterials have attracted more and more attention. The so-called metamaterials refer to some artificial composite structures or composite materials with extraordinary physical properties that natural materials do not have. Through the orderly design of the key physical structure of materials, the limitations of some natural materials can be broken through, so that extraordinary material properties beyond the ordinary materials inherent in nature can be obtained. [0003] Metamaterials include artificial microstructures made of metal wires with a certain pattern shape and a substrate to which the artificial microstructures are attached. A plurality of artificial microstructures are arrayed on the substrate, and the substrate supports the ...

AI Technical Summary

Problems solved by technology

However, the problem existing in the existing technology is: to make the electromagnetic waves diverge, the dielectric constant needs to change continuously within the scale range of the metamaterial, and the range of the dielectric constant is very large, so the size of the artificial microstructure is required to change greatly , when designing artificial microstructures of metamaterials, since the size of artificial microstructures is limited by the wavelength of electromagnetic waves, the size change range of metamaterials is limited, so it is difficult to manufacture large-area metamaterials

[0007] Therefore, when using anisotropic metamaterials to achieve divergence, the size of the metamaterials is limited, and only smaller-sized metamaterials can be produced.

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