Resonance-mirror-enhanced Raman spectrum detection device

Abstract

The invention provides a resonance-mirror-enhanced Raman spectrum detection device. The resonance-mirror-enhanced Raman spectrum detection device comprises a coupling component, a linear polarization laser light source arranged at the first side of the coupling component, a Raman probe, and an optical waveguide, wherein the lower surface of the optical waveguide is combined on the upper surface of the coupling component, a resonance mirror is formed by the optical waveguide and the coupling component, combined interface of the optical waveguide and the coupling component is a coupling surface; molecules to be detected are attached to the upper surface of the optical waveguide, and both of the coupling component and the optical waveguide are made of a non-metal medium material. According to the resonance-mirror-enhanced Raman spectrum detection device provided by the invention, a resonance mirror made of an all-medium material is used as an excitation component; due to the advantages of simple structure and mature production processes of the resonance mirror, the Raman spectrum detection device is relatively good in controllability and repeatability, and low in cost.

Description

technical field [0001] The invention relates to the technical field of molecular spectrum detection, in particular to a resonant mirror enhanced Raman spectrum detection device. Background technique [0002] Raman spectroscopy, like infrared absorption spectroscopy, is mainly used to study molecular vibrations, but molecular Raman spectroscopy contains more information about molecular structures and properties than molecular infrared absorption spectroscopy. By studying the Raman scattering spectrum of molecules, the type of molecules can be determined, and information such as the symmetry properties and spatial orientation of molecules can be obtained. [0003] The biggest problem encountered in the application of Raman spectroscopy comes from its inherent defect - the Raman signal is extremely weak, so various new technologies have been invented to enhance this weak signal. These new technologies include total reflection (TIR) ​​Raman spectroscopy, surface plasmon resonan...

AI Technical Summary

Problems solved by technology

However, these two technologies also have major disadvantages: First, surface-enhanced Raman (SERS) technology requires a specially designed enhanced substrate-metal nanoparticles, ordered arrays of metal nanostructures, etc., and the size of metal nanoparticles is less controllable. Poor, so the repeatability of Raman signal enhancement is not good, and the production of ordered arrays of metal nanostructures requires harsh technical conditions; secondly, the tip-enhanced Raman (TERS) technology requires the use of atomic force microscopy or scanning tunneling microscopy The Raman signal is enhanced by the metal needle tip, so the requirements for equipment and experimental conditions are very high

[0004] Resonant mirrors have been used as chemical / biological sensing elements as early as the early 1990s, but their potential in Raman signal enhancement has not been recognized and explored

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