Light field traveling wave cavity enhanced surface plasma resonance sensing device

Abstract

The invention provides a light field traveling wave cavity enhanced surface plasma resonance sensing device which is characterized by comprising a frequency-adjustable light source, a polygonal columnar prism unit which comprises a regularly polygonal columnar prism with at least five edges and a metal layer, a nano particle layer and a micro-nano optical structural layer which are arranged on the outer sides of different edges of the regularly polygonal columnar prism, and a light information receiving unit, wherein a sample to be detected is placed on the outer side of the metal layer; the nano particle layer is of a core-shell structure and is used for enhancing Raman sensing of the sample to be detected; the core-shell structure comprises a gold nano layer and a silicon dioxide nano layer; the micro-nano optical structural layer is used for super-resolution image sensing. Therefore, the light field traveling wave cavity enhanced surface plasma resonance sensing device disclosed by the invention has the advantages of simple system structure, uniform distribution of intensity of a light field, high sensitivity, high system stability and the like, and has the characteristics of multi-mechanism sensing detection, capability of realizing regional measurement, easiness in function extension, wide application range and the like.

Description

technical field [0001] The invention belongs to the technical field of optical detection, in particular to an optical field traveling wave cavity enhanced surface plasmon resonance sensing device. Background technique [0002] Surface plasmon resonance sensing technology has developed rapidly and is widely used in many fields such as material analysis, environmental detection, environmental perception, food safety, life sciences, biomedicine, medical diagnosis, security, criminal investigation, quality inspection, process control, etc. It is one of the hotspots in the development of material measurement and analysis technology, but the current surface plasmon resonance sensing technology still has many shortcomings. [0003] Chinese invention patent (application number is CN01136673.7, publication number is CN1342895) discloses a wavelength modulation polarization type surface plasmon wave sensor, the wavelength modulation polarization type surface plasmon wave sensor includ...

AI Technical Summary

Problems solved by technology

Although the high-definition cavity surface plasmon resonance sensor has certain advantages, there are still essential deficiencies. The two planes of the isosceles triangular prism are used to form a high-definition cavity. This type of cavity is a linear high-definition cavity, and the light field is inside Back-and-forth propagation, standing wave behavior exists, and the light field intensity distribution is uneven, which affects the sensitivity of the device and the anti-interference performance of the system. At the same time, the sensing capability of this prior art device is limited, and multi-mechanism sensing detection cannot be realized, which affects the scope of application.

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