Online molecular detector based on D-shaped optical fibers and nano-ring cavities and making method of molecular detector

A ring cavity and detector technology, applied in the direction of material analysis, instruments, and measuring devices through optical means, can solve the problems of difficult scale production and low efficiency of nano-processing technology, so as to increase the interaction length and improve the adjustable characteristics And the degree of enhancement of the electric field, the effect of portability

Active Publication Date: 2018-11-27
NANJING UNIV OF INFORMATION SCI & TECH
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However, the current nanofabrication technology has low efficiency and is ge...

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  • Online molecular detector based on D-shaped optical fibers and nano-ring cavities and making method of molecular detector
  • Online molecular detector based on D-shaped optical fibers and nano-ring cavities and making method of molecular detector
  • Online molecular detector based on D-shaped optical fibers and nano-ring cavities and making method of molecular detector

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[0040]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0041] Those skilled in the art can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It should also be understood that terms such as those defined in commonly used dictionaries should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein ...

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Abstract

The invention discloses an online molecular detector based on D-shaped optical fibers and nano-ring cavities and a making method of the molecular detector. The main structure of the detector comprisesan asymmetrical nano-ring cavity array, lateral D-shaped optical fibers and an optical fiber connector. The nano-ring cavity array is processed on the lateral surface of the lateral D-shaped opticalfibers, and the ring cavity is formed by semiconductor gain materials and metallic materials alternately, so that the surface plasmon signal intensity is improved, and the plasmon wavelength on the cylindrical surface is modulated. Meanwhile, the structural design in the ring cavity is asymmetrical, so that the polarization sensitivity is realized; and the cavity surface is subjected to isolatingprotection by a 5nm dielectric layer. Exciting light comes into one end of the D-shaped optical fibers, and the surface plasmon effect in the metal ring cavity is excited, so that the electric field intensity in the ring is obviously enhanced; and therefore, the SERS (Surface Enhanced Raman Scattering) signal of adsorbed molecules on the metal ring surface is excited, and the signal is coupled into the D-shaped optical fibers and received by the other end of the optical fibers. The molecular detector formed in the invention is capable of realizing online monitoring and is applicable to trace monitoring.

Description

technical field [0001] The invention relates to an on-line molecular detector based on a D-shaped optical fiber and a nano ring cavity and a manufacturing method thereof, belonging to the field of electronic communication and information engineering. Background technique [0002] Surface-Enhanced Raman Scattering (Surface-Enhanced Raman Scattering, SERS) technology is a new generation of detection technology developed on the basis of ordinary Raman. Compared with ordinary Raman scattering technology, surface-enhanced Raman scattering technology has the characteristics of good selectivity and high sensitivity, and can realize the detection of single molecules. means of analysis. [0003] When the electromagnetic wave is incident on the interface between the metal and the medium, the free electrons on the metal surface oscillate collectively, and the electromagnetic wave couples with the free electrons on the metal surface to form a near-field electromagnetic wave that propag...

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658Y02P70/50
Inventor 倪海彬阮成尧章镕波郭晓董钟田鸣宇
Owner NANJING UNIV OF INFORMATION SCI & TECH
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