Device and method for generating surface plasma wave

A surface plasmon and bottom surface technology, which is used in measurement devices, material analysis by optical means, instruments, etc., can solve the problems of surface plasmon wave devices and methods that are not proposed, and achieve improved refractive index response sensitivity and resonance spectrum modulation. The effect of high characteristic and high resonance strength

Active Publication Date: 2014-01-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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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 de

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  • Device and method for generating surface plasma wave
  • Device and method for generating surface plasma wave
  • Device and method for generating surface plasma wave

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[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 method for generating a surface plasma wave. The device comprises a light source, a transmission optical fiber and a triangular prism, wherein the triangular prism is a pyramid with a rectangular bottom; the connecting line of the top point of the pyramid and the middle point of the diagonal lines of the bottom is perpendicular to the bottom; the pyramid sides where the two long sides of the bottom are positioned are isosceles right triangles; the bottom of the triangular prism is a sensing surface; a photocoupling layer and a metal film layer are sequentially plated on the sensing surface; the surface of the metal film layer is coated with an environment medium; one side of the pyramid sides, where the two short sides of the bottom are positioned, is taken as an incident plane, while the other side is taken as a reflecting plane. By virtue of the device and the method disclosed by the invention, the energy at the resonance concentrated area is concentrated, and the peak value is obviously increased, and at the same time, the device has the resonance spectrum modulation characteristic and high refraction 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] Surface Plasmon Resonance (SPR) effect, as a physical optical phenomenon that exists at the interface between metal thin film and dielectric, uses attenuated total reflection to cause charge oscillation on the metal surface, and 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 developed a SPR biosensor for detecting ...

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Application Information

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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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