Artificial surface plasmon waveguide based on helical branching structure
An artificial surface plasmon and helical technology, applied in the direction of waveguide, waveguide-type devices, electrical components, etc., can solve the problems of limiting high integrated circuits and system applications, large size, etc., and achieve strong sub-wavelength scale local field confinement performance , small size, convenient artificial design
Inactive Publication Date: 2017-02-22
XIAMEN UNIV +1
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Problems solved by technology
Artificial surface plasmon waveguides with planar structures have received extensive attention due to their important applications in the miniaturization of microwave and terahertz integrated circuits and systems. Limit its application in high integrated circuits and systems
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[0019] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0020] like Figure 1~5 As shown, the embodiment of the present invention is provided with a metal thin film transmission line 1 and a dielectric substrate 2; the metal thin film transmission line 1 is arranged on one side or both sides of the dielectric substrate 2, and the periodic unit structure of the metal thin film transmission line 1 consists of rectangular strips The structure 12 is composed of artificially designed helical branches 13 .
[0021] The artificially designed spiral branch 13 can adopt a spiral structure such as circular, elliptical, triangular, rectangular or polygonal, and the artificially designed spiral branch 13 can be loaded on one side of the strip branch alone or be symmetrical or antisymmetrical Loaded on both sides of the rectangular strip structure in a manner such as offset symmetry.
[0022] The metal thin fi...
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The invention disclosed an artificial surface plasmon waveguide based on a helical branching structure and relates to a surface plasmon waveguide. The artificial surface plasmon waveguide is provided with metal film transmission lines and a dielectric substrate; the metal film transmission lines are arranged on one side or two sides of the dielectric substrate; a periodic unit structure of the metal film transmission lines is formed by loading artificially-designed helical branches on a rectangular strip structure. The metal film transmission lines are formed by adopting a mode of artificially designing periodic helical branches for loading and are used for guiding microwaves and terahertz artificial surface plasmon; the size is small; a dispersion curve is positioned at the right side of a light conical line, is far away from the light conical line and has certain negative reflection phenomenon; progressive frequency of the dispersion curve is far lower than that of the artificial surface plasmon waveguide; excessively-strong subwavelength scale local field constraining performance can be realized; the artificial surface plasmon waveguide can adopt a flexible substrate, and can be used for conformal transmission of the microwaves and terahertz artificial surface plasmon electromagnetic waves via bending deformation.
Description
technical field [0001] The invention relates to a surface plasmon waveguide, in particular to an artificial surface plasmon waveguide based on a helical branch structure. Background technique [0002] Surface plasmons (Surface Plasmons, SPs) are collective oscillations of free electrons along the surface of a conductor, that is, density waves of electron gas. The mixture formed by the coupling of SPs and photons in the adjacent medium, that is, polaritons, is called surface plasmon polaritons (Surface Plasmon Polaritons, SPPs). SPPs can propagate along the continuous interface and are highly concentrated on the interface. The field strength is the largest at the interface and decays exponentially on both sides of the interface. It is a kind of surface wave with strong binding. It can overcome the diffraction limit and realize the space confinement of the electromagnetic field at the sub-wavelength level, which has great application value in the fields of miniaturized circui...
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Login to View More IPC IPC(8): H01P3/00H01P3/08H01P3/10
CPCH01P3/003H01P3/088H01P3/10
Inventor 叶龙芳张威肖亦凡蔡国雄刘娜柳清伙
Owner XIAMEN UNIV