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Surface plasma resonance optical waveguide sensor based on dual reflectors

A surface plasmon, double-reflecting surface technology, used in instruments, scientific instruments, scattering characteristics measurement, etc., can solve the problems of high cost and bulky devices, and achieve the effects of high sensitivity, improved sensitivity, and increased divergence angle.

Active Publication Date: 2012-10-17
ZHEJIANG UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] Traditional volume prism surface plasmon resonance sensors such as figure 1 As shown, its technical disadvantages are that the device is bulky and costly, and it can only detect one substance at the same time.

Method used

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  • Surface plasma resonance optical waveguide sensor based on dual reflectors
  • Surface plasma resonance optical waveguide sensor based on dual reflectors
  • Surface plasma resonance optical waveguide sensor based on dual reflectors

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Embodiment Construction

[0017] The optical sensor is based on the principle of surface plasmon resonance technology. When light is incident on the medium-metal-substance interface, evanescent waves will be generated when the incident angle satisfies the total reflection condition, and at a certain incident angle (if the wavelength is fixed), the evanescent wave satisfies the resonance condition, Thus, surface plasmon waves are excited. The refractive index of the measured substance is related to the resonance angle. When the refractive index of the measured substance is changed, the resonance angle of the excited surface plasmon wave will change accordingly, so we can infer the measured substance through the shift of the resonance angle. changes in the refractive index.

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 2-5 As shown, the surface plasmon resonance optical waveguide sensor based on the d...

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Abstract

The invention discloses a surface plasma resonance optical waveguide sensor based on dual reflectors, which comprises an input waveguide array, a free propagation area, two metal sensing layers, an output waveguide array and a detector array, wherein the two metal sensing layers are plated on a reflection end plane and a reflection end curve of the free propagation area; the two metal sensing layers are etched with deep etched grooves; incident light is guided from a waveguide in the input waveguide array, enters one end of the free propagation area, and reflected by the reflection end plane and the reflection end curve of the free propagation area, and finally arrives at the detector array through the output waveguide array. By virtue of two reflectors, the detecting precision of the sensor is greatly improved; the sensor can be used to detect two substances at the same time, so that much detecting time can be saved; the curve is taken as the reflector, so that the detecting range and the detecting precision are improved; the space distance required for propagation is reduced; and the size of the sensor is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of surface plasmon resonance, in particular to a surface plasmon resonance optical waveguide sensor based on double reflection surfaces. Background technique [0002] In recent decades, surface plasmon resonance technology has received more and more attention, and has been widely used in food, pharmaceutical, chemical, and clinical testing. The advantages of real-time monitoring and no need for calibration make surface plasmon technology have obvious advantages in biological monitoring. [0003] Traditional volume prism surface plasmon resonance sensors such as figure 1 As shown, its technical disadvantages are that the device is bulky and costly, and it can only detect one substance at the same time. Contents of the invention [0004] The object of the present invention is to provide a surface plasmon resonance optical waveguide sensor based on double reflection surfaces to address the deficiencies of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/55G01N21/41G01N21/552
Inventor 李明宇张伟何建军
Owner ZHEJIANG UNIV
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