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A device and method for generating surface plasmon waves

A technology of surface plasmon and surface plasmon, applied in measuring devices, material analysis through optical means, instruments, etc., can solve problems such as surface plasmon wave devices and methods that have not been proposed, and achieve improved refractive index response sensitivity and high resonance The effect of high intensity and resonance spectrum modulation characteristics

Active Publication Date: 2016-06-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0004] Most of the above work focuses on high-sensitivity resonance sensors suitable for specific monitoring molecules. At present, the device and method for generating surface plasmon waves for dual modulation of resonance spectrum and sensitivity have not been proposed yet.

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  • A device and method for generating surface plasmon waves
  • A device and method for generating surface plasmon waves
  • A device and method for generating surface plasmon waves

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Embodiment Construction

[0032] like figure 1 , figure 2 Shown a kind of device of the present invention that produces surface plasmon wave, comprises light source, transmission optical fiber 5 and triangular prism 1, and described triangular prism is that the bottom surface is a rectangular pyramid, the apex of the pyramid and the midpoint of the bottom diagonal line The connection line is perpendicular to the bottom surface, and the sides of the pyramid where the two long sides of the bottom surface are located are isosceles right triangles; the bottom surface of the triangular prism is a sensing surface, and the sensing surface is coated with a photoelectric coupling layer 2 and a metal film layer in turn. 3. The surface of the metal thin film layer is covered with an environmental medium; one side of the pyramid side where the two short sides of the bottom surface are located is used as the incident surface, and the other side is used as the reflecting surface; wherein, the incident light output ...

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Abstract

The invention discloses a device and a method for generating surface plasma waves. Including a light source, a transmission fiber and a triangular prism, the triangular prism is a pyramid with a rectangular bottom, the line connecting the apex of the pyramid and the midpoint of the diagonal line at the bottom is perpendicular to the bottom, and the sides of the pyramid where the two long sides of the bottom are located All are isosceles right-angled triangles; the bottom surface of the triangular prism is a sensing surface, and the sensing surface is sequentially coated with a photoelectric coupling layer and a metal thin film layer, and the surface of the metal thin film layer is covered with an environmental medium; the two bottom surfaces One of the side faces of the pyramid where the short side is located serves as the incident face, and the other serves as the reflective face. The energy of the resonant concentration region produced by the device and method of the invention is concentrated and the peak value is significantly increased, and simultaneously has resonant spectrum modulation characteristics and high refractive index response sensitivity.

Description

technical field [0001] The invention discloses a device and method for generating surface plasma waves, belonging to the fields of optical filtering and modulation device design and the like. Background technique [0002] The surface plasmon resonance (Surface Plasmon Resonance, SPR) effect is a physical optical phenomenon that exists at the interface between a metal thin film and a dielectric and uses attenuated total reflection to cause the charge oscillation on the metal surface. It is very sensitive to changes in the refractive index of the ambient medium. SPR technology has the advantages of good specificity, suitable for in situ labeling, no secondary pollution, and strong field enhancement effect. With the continuous development of molecular biological detection, environmental monitoring and new optical filter technology, improving the modulation effect of SPR effect and improving its response sensitivity have become new research hotspots. [0003] L. Wu et al. have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/552
Inventor 曾捷张倩昀周雅斌张先辉章晓燕周鹏李继峰
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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