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Surface plasmon lens based on artificial electromagnetic material

A technology of surface plasmons and artificial electromagnetic materials, applied in the direction of lenses, electrical components, optical components, etc., can solve the problems of poor binding ability and achieve the effect of simple production, mature technology and stable performance

Active Publication Date: 2015-07-01
SOUTHEAST UNIV
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Problems solved by technology

[0002] In the optical band, metals have negative permittivity, and surface plasmons exist on the metal surface; while in microwave, millimeter wave and terahertz bands, metals have positive junction constants, and surface waves are in the form of Sommerfeld waves existence, and its poor confinement ability makes it difficult to design surface wave devices in the microwave, millimeter wave, and terahertz bands

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  • Surface plasmon lens based on artificial electromagnetic material
  • Surface plasmon lens based on artificial electromagnetic material
  • Surface plasmon lens based on artificial electromagnetic material

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Embodiment Construction

[0013] Such as figure 1 and figure 2 As shown, the surface plasmon lens based on the novel artificial electromagnetic material of the present invention mainly includes a substrate 1 and a surface metal structure 2 . The surface metal structure is axisymmetric and consists of multiple structural units, and the structural units include U-shaped metal sheets 3 . The U-shaped metal sheets are arranged in several rows based on the horizontal central axis; the U-shaped metal sheets in the same row have the same groove depth, the U-shaped metal sheets in the same row have equal spacing, and the spacing between adjacent rows is equal; in different rows The depth of the grooves is not equal, and the depth of the grooves gradually decreases from the place close to the axis of symmetry to the place far away from the axis of symmetry. The surface refractive index of the lens is gradually distributed on both sides.

[0014] Surface plasmons can propagate on artificial electromagnetic m...

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Abstract

The invention discloses a surface plasmon lens based on an artificial electromagnetic material. The lens comprises a substrate and a surface metal structure arranged on the substrate and formed by structure units which are arranged periodically, wherein the surface metal structure is axially symmetric; each structure unit comprises a U-shaped metal sheet; and the groove depth of each U-shaped metal sheet changes gradually outwards along a symmetry axis. According the surface plasmon lens, the electromagnetic waves can be controlled, and phase control of the lens on the surface plasmon is realized; and the lens can work in different frequency bands of microwaves, millimeter waves, Terahertz waves and the like by virtue of scaling of structure parameters.

Description

technical field [0001] The invention relates to artificial composite materials, in particular to a lens capable of regulating the phase of surface plasmons. Background technique [0002] In the optical band, metals have negative permittivity, and surface plasmons exist on the metal surface; while in microwave, millimeter wave and terahertz bands, metals have positive junction constants, and surface waves are in the form of Sommerfeld waves exist, and its poor confinement ability makes it difficult to design surface wave devices in the microwave, millimeter wave, and terahertz bands. [0003] A new type of artificial electromagnetic material is an artificial material formed by periodically / aperiodically arranging sub-wavelength basic units with specific geometric shapes, or implanting them in the body (or surface) of a matrix material. The difference between new artificial electromagnetic materials and traditional materials is that the original microscopic units (atoms or mo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B3/00H01Q15/02
Inventor 崔铁军万向
Owner SOUTHEAST UNIV
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