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Excitation and long-distance transport structures of surface waves based on metamaterials

A transmission structure and metamaterial technology, which is applied in the field of surface wave excitation and long-distance transmission structure based on metamaterials, can solve the problems of short transmission distance and inability to meet the requirements of light propagation distance of optical components, and achieve simple structure and favorable Integrated, easily coupled effects

Inactive Publication Date: 2018-10-26
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0005] In addition, the transmission distance of traditional SPPs (abbreviation for surface plasmon polaritons or surface plasmon waves) is very short, and the transmission length in the visible light band is between 10-100um, which cannot meet the requirements for light transmission distance in optical components.

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  • Excitation and long-distance transport structures of surface waves based on metamaterials
  • Excitation and long-distance transport structures of surface waves based on metamaterials
  • Excitation and long-distance transport structures of surface waves based on metamaterials

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Embodiment Construction

[0024] The technical scheme of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0025] figure 1 is a schematic diagram of the relevant physical quantities that excite surface plasmon waves (hereinafter referred to as surface waves) on the interface between metal and medium, and the dispersion relationship of surface waves is given by the following formula:

[0026]

[0027] Where: ε 1 is the dielectric constant of the metal, ε 2 is the dielectric coefficient of the medium, β is the propagation constant of the surface plasmon wave, ω is the frequency, and c is the speed of light. figure 1 middle, is a wave vector in metal, is the wave vector in the medium, is the transverse wave vector in the metal, is the transve...

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Abstract

The invention discloses surface wave excitation and long-distance transmission structures based on metamaterials. The first structure, the second structure and the third structure are free space coupling structures, and the fourth structure is an end face coupling structure. All the four structures do not need to coupled through lenses high in refractive index, integration of optical elements is facilitated, meanwhile, the propagation distance of light can reach millimeter magnitude, and the structures can be widely used in the optical elements. The structures are simple, SPPs are easily coupled under the circumstance that no lens high in refractive index is used, integration of the optical elements is facilitated, meanwhile, the propagation distance of the light can reach the millimeter magnitude, and the structures can be widely used in the optical elements.

Description

technical field [0001] The present invention relates to the excitation and long-distance transport structures of surface waves based on metamaterials. Background technique [0002] Surface plasmons (surface plasmons) is a kind of electromagnetic surface wave, its field intensity is the largest at the surface, and it is an exponentially decaying field in the direction perpendicular to the interface. It can be excited by electrons and light waves. Since in general (for a continuous metal-medium interface), the wave vector of the surface plasmon wave is larger than that of the light wave, it is impossible to directly excite the surface plasmon wave (propagating surface plasmon) propagating along the interface with the light wave. [0003] In order to stimulate surface plasmon waves, some special structures need to be introduced to achieve wave vector matching. There are two commonly used ones: one is the Kretschmann structure, that is, the metal film is directly coated on the p...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/122
Inventor 殷澄姚澄单鸣雷高远韩庆邦朱昌平
Owner HOHAI UNIV CHANGZHOU
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