Planar two-waveband surface plasmon waveguide based on composite cycle structure

Abstract

The invention discloses a planar two-waveband surface plasmon waveguide based on a composite cycle structure. The planar two-waveband surface plasmon waveguide comprises a composite cycle straight-metal grating structure and a composite cycle arc-metal grating structure, wherein the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure are printed on a flexible medium and are in tangent connection. A row of deep grooves A and a row of shallow grooves B are formed in a staggered mode in the same sides of the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure. One of the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure serves as an input end of the waveguide, the other one of the composite cycle straight-metal grating structure and the composite cycle arc-metal grating structure serves as an output end of the waveguide, and a metallic conducting wire is arranged on the front side of the input end, serves as a feed source, and is used for exciting two-waveband surface waves on the input end. According to the planar two-waveband surface plasmon waveguide based on the composite cycle structure, a plasma straight waveguide and a bent waveguide of an ultrathin flexible thin film based on the composite cycle structure are achieved at the first time in a microwave section. The planar two-waveband surface plasmon waveguide based on the composite cycle structure has the advantages of being simple in structure, convenient to manufacture, and capable of adapting being used in the microwave section.

Description

Technical field [0001] The present invention relates to a waveguide structure, in particular to a planar dual-band surface plasmon waveguide printed on a flexible ultra-thin dielectric film with a thickness close to zero and based on a composite periodic structure, belonging to communications, integrated circuits and Surface wave technology field. Background technique [0002] Artificial surface plasmons are not restricted by the diffraction limit, so they can be used to construct miniaturized devices and have important applications in surface technology and integrated circuits. The existing artificial surface plasmon waveguide uses a single-period structure with a finite thickness, which is not conducive to integration and miniaturization. We use a simple method to transmit dual-band surface plasmons by designing a compound periodic grating structure with alternating groove depths on the ultra-thin metal surface. At the same time, by adjusting the depth of the deep groove and ...

AI Technical Summary

Problems solved by technology

The existing artificial surface plasmon waveguide adopts a finite thick single-period structure, which is not conducive to integration and miniaturization

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