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Directional coupler on basis of spoof surface plasmon polariton

A technology of plasmonic polariton and artificial surface plasmon, which is applied in the direction of electrical components, waveguide devices, connecting devices, etc., can solve the problems of large transmission loss and achieve small transmission loss, simple structure and large working bandwidth. Effect

Inactive Publication Date: 2013-01-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional waveguide structures, such as two-wire transmission lines and coaxial lines, when the frequency increases to the microwave band, the transmission loss is very large

Method used

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  • Directional coupler on basis of spoof surface plasmon polariton
  • Directional coupler on basis of spoof surface plasmon polariton
  • Directional coupler on basis of spoof surface plasmon polariton

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0018] see figure 1 , figure 2 , image 3 and Figure 4 As shown, the directional coupler based on artificial surface plasmon polaritons of the present invention is a directional coupler based on artificial surface plasmon polaritons, including an input terminal 1, an isolation terminal 2, a coupling terminal 3, and a through terminal 4 and coupling section 5. The directional coupler based on artificial surface plasmon polaritons is a planar structure, in which the ...

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Abstract

The invention discloses a directional coupler on the basis of the spoof surface plasmon polariton, which comprises an input end, an isolation end, a coupling end, a through end and a coupling section. The input end, the isolation end, the coupling end, the through end and the coupling section all consist of planar plasmon polariton waveguides; each planar plasmon polariton waveguide consists of metal units which are periodically arranged; grooves vertical to the length directions of the planar plasmon polariton waveguides are arranged on the metal units; and the grooves are all positioned at the same sides of the planar plasmon polariton waveguides. When electromagnetic waves are excited from the input end, surface waves can be formed on the surface of a device by the incidence electromagnetic waves; and after being coupled by a middle coupling section, the electromagnetic waves with different wavelengths can be output at the through end and the coupling end according to different ratios. The electromagnetic waves with different wavelengths in a specific frequency band can be output at different ports and can work in a random frequency band by amplifying or reducing the size in equal proportion, and thus, the directional coupler has high application value.

Description

technical field [0001] The invention belongs to the field of artificial surface plasmon polaritons, in particular to a directional coupler based on artificial surface plasmon polaritons. Background technique [0002] Waveguides based on surface plasmon polaritons (Surface Plasmon Polariton) can conduct electromagnetic waves with the same size and bandwidth as traditional photonic circuits, and are not limited by the diffraction limit. This makes it possible for SPP devices to realize the perfect combination of photons and electronic components on the nanometer scale in the future, so it has attracted wide attention from scholars. [0003] However, SPPs in nature only exist in the optical band. In order to realize SPPs in lower frequency bands (THz, GHz), artificial surface plasmon polaritons (Spoof Surface Plasmon Polaritons) have been proposed. SSPP is a new type of material that can be artificially designed to change the surface wave dispersion curve by changing the struc...

Claims

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Application Information

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IPC IPC(8): H01P5/18
Inventor 崔铁军沈晓鹏赵沛杨艳
Owner SOUTHEAST UNIV
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