CN110286443B - Graphene oxide optical fiber head - Google Patents
Graphene oxide optical fiber head Download PDFInfo
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- CN110286443B CN110286443B CN201910583045.9A CN201910583045A CN110286443B CN 110286443 B CN110286443 B CN 110286443B CN 201910583045 A CN201910583045 A CN 201910583045A CN 110286443 B CN110286443 B CN 110286443B
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 43
- 229910021389 graphene Inorganic materials 0.000 title claims abstract description 43
- 239000013307 optical fiber Substances 0.000 title claims abstract description 40
- 238000010521 absorption reaction Methods 0.000 claims abstract description 52
- 229910052751 metal Inorganic materials 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 40
- 239000002923 metal particle Substances 0.000 claims description 11
- 239000007769 metal material Substances 0.000 claims description 5
- 229910000510 noble metal Inorganic materials 0.000 claims description 5
- 239000000835 fiber Substances 0.000 claims description 4
- 238000001069 Raman spectroscopy Methods 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000004416 surface enhanced Raman spectroscopy Methods 0.000 abstract description 4
- 230000005672 electromagnetic field Effects 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 8
- 230000005284 excitation Effects 0.000 description 5
- 238000001228 spectrum Methods 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 2
- 238000001237 Raman spectrum Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35338—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using other arrangements than interferometer arrangements
- G01D5/35354—Sensor working in reflection
- G01D5/35358—Sensor working in reflection using backscattering to detect the measured quantity
- G01D5/35364—Sensor working in reflection using backscattering to detect the measured quantity using inelastic backscattering to detect the measured quantity, e.g. using Brillouin or Raman backscattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/3537—Optical fibre sensor using a particular arrangement of the optical fibre itself
- G01D5/35374—Particular layout of the fiber
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/262—Optical details of coupling light into, or out of, or between fibre ends, e.g. special fibre end shapes or associated optical elements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
- Carbon And Carbon Compounds (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention belongs to the technical field of optical fibers, and particularly relates to a graphene oxide optical fiber head which sequentially comprises an optical fiber core head, an absorption layer and a reflection layer from bottom to top, wherein incident light is emitted into the absorption layer from the optical fiber core head, the absorption layer absorbs the incident light, surface charges of the absorption layer are excited, a strong local electromagnetic field is generated, and strong absorption and dissipation are generated on the surface of the absorption layer, so that a detection signal of surface-enhanced Raman scattering is improved, the technical problem of weak optical fiber Raman scattering effect in the prior art is solved, and the graphene oxide optical fiber head has good popularization value.
Description
Technical Field
The invention relates to the technical field of optical fibers, in particular to a graphene oxide optical fiber head.
Background
Optical fibers are short for optical fibers, and are fibers made of glass or plastic that can be used as a light conducting means. The principle of transmission is "total reflection of light". The Raman scattering (Raman scattering) refers to a phenomenon in which the frequency of light waves changes after being scattered.
When light is irradiated onto a substance, scattering occurs, and the scattered light includes components longer and shorter than the wavelength of the excitation light in addition to an elastic component (rayleigh scattering) having the same wavelength as the excitation light, and the latter phenomenon is collectively called the raman effect. Inelastic scattering caused by interaction between excitation light and molecular vibration, optical phonon excitation in a solid, and the like is called raman scattering, and a spectrum formed by combining rayleigh scattering and raman scattering is generally called a raman spectrum. Since raman scattering is very weak, it was not discovered by indian physicist raman et al until 1928.
While the fiber raman scattering effect, along with the british scientist Rayleigh (Rayleigh) in 1881, proposed scattering of light to be caused by density fluctuations of the medium, the intensity of Rayleigh scattered light being inversely proportional to the fourth power of the wavelength of the light wave. Researches show that the frequency shift of the Raman scattering spectrum is related to the vibration and the rotation motion of molecules, and the theory of the Raman scattering spectrum is established on the basis of quantum theory. On the other hand, raman scattering spectroscopy has also become an important tool in the study of molecular structures and their motion-extreme-si. But the raman scattering effect of the optical fiber is weak at present.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a graphene oxide optical fiber head. The technical problem to be solved by the invention is realized by the following technical scheme:
a graphene oxide optical fiber head sequentially comprises an optical fiber core head, an absorption layer and a reflection layer from bottom to top.
Further, the absorption layer comprises not less than one metal column; and two ends of the metal column are respectively connected with the absorption layer and the optical fiber core head.
Further, the metal posts are different in diameter; the distances between the metal posts are different.
Further, the metal posts comprise outer layer metal posts and inner layer metal posts; the outer metal pillar has a first characteristic height; the inner metal pillar has a second characteristic height; the first feature height is greater than the second feature height; the inner metal column is separated from the absorption layer.
Further, the absorption layer is composed of metal particles.
Further, the metal posts and the metal particles are both made of a noble metal material.
Further, the reflective layer is composed of graphene oxide or graphene.
Further, the graphene oxide or graphene is two layers.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a graphene oxide optical fiber head, wherein incident light is emitted into an absorption layer from an optical fiber core head, the absorption layer absorbs the incident light, surface charges of the absorption layer are excited, a strong local electromagnetic field is generated, and strong absorption and dissipation are generated on the surface of the absorption layer, so that detection information of surface-enhanced Raman scattering is improved.
2. According to the graphene oxide optical fiber head, the upper surface of the absorption layer is covered with graphene oxide, the graphene oxide is used for providing the carrier concentration on the surface of the absorption layer, the charge vibration strength is improved, and therefore the electric field on the absorption layer is improved. On the other hand, the graphene oxide reflects the incident light passing through the absorption layer to the absorption layer again, and the absorption and Raman scattering of the absorption layer of the graphene oxide optical fiber head of the invention for the incident light are enhanced under the action of the reflected electric field and the reflected Raman signal.
Drawings
Fig. 1 is a first structural schematic diagram of a graphene oxide optical fiber head according to an embodiment of the present application;
fig. 2 is a schematic view of a second structure of a graphene oxide optical fiber according to an embodiment of the present application.
In the figure: 1. an optical fiber core print; 2. an absorbing layer; 21. a metal post; 22. metal particles; 3. and a reflective layer.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example 1:
in order to further improve the raman scattering of the micro-nano structure, the embodiment discloses a graphene oxide optical fiber head, as shown in fig. 1, which sequentially comprises an optical fiber core head 1, an absorption layer 2 and a reflection layer 3 from bottom to top.
Specifically, the method comprises the following steps: incident light is incident into the absorption layer 2 from the optical fiber core head 1, the absorption layer 2 absorbs the incident light, surface charges of the absorption layer 2 are excited, a strong local electromagnetic field is generated, strong absorption and dissipation are generated on the surface of the absorption layer 2, and therefore detection signals of surface-enhanced Raman scattering are improved.
The reflection layer 3 reflects the incident light passing through the absorption layer 2 to the absorption layer 2 again, and the absorption layer 2 of the graphene oxide optical fiber head of the embodiment enhances the absorption and raman scattering of the incident light under the action of the reflected electric field and the reflected raman signal.
Specifically, the absorption layer 2 comprises at least one metal column 21, two ends of the metal column 21 are respectively connected with the absorption layer 2 and the optical fiber core head 1, and the metal column 21 is made of a noble metal material. The diameters of the metal columns are different, and the distances between the metal columns are different, so that strong local electric fields can be generated on the surfaces of the metal columns under different exciting lights.
The metal column 21 comprises an outer metal column 21 and an inner metal column 21, the outer metal column 21 has a first characteristic height, the inner metal column 21 has a second characteristic height, the first characteristic height is greater than the second characteristic height, and the inner metal column 21 is separated from the absorption layer 2.
The height of the outer metal column 21 is larger than that of the inner metal column 21, so that the electric field of the absorption layer 2 is gathered in the absorption layer 2, the excitation electric field generated on the surface is localized, the absorption of incident light is enhanced, and stronger Raman scattering is generated, thereby achieving the purpose of improving the detection signal of the surface-enhanced Raman scattering.
Specifically, as shown in fig. 2, the absorption layer 2 is composed of metal particles 22, and the metal particles 22 are made of a noble metal material. The metal particles 22 have a strong absorption capability for incident light, and form a local electric field, which generates electric field dissipation, thereby enhancing the raman scattering effect and changing the frequency of light.
The reflecting layer 3 is composed of graphene oxide or graphene, and the graphene oxide or graphene is two layers. An absorption cavity can be formed between the two layers of graphene or the two layers of graphene oxide, and an incident light field is localized in the formed absorption cavity, so that the absorption and scattering of the graphene oxide optical fiber head of the embodiment on incident light are enhanced, and the Raman scattering effect of the graphene oxide optical fiber head of the embodiment is enhanced.
By using an oblique angle deposition method, a layer of transparent insulating material is filled between the gaps of the metal posts 21 or the metal particles 22, and the metal posts 21 or the metal particles 22 are fixed on the optical fiber core head 1 by using the insulating material, so that the stability and the service life of the graphene oxide optical fiber head of the embodiment are enhanced.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (7)
1. A graphene oxide optical fiber head is characterized by sequentially comprising an optical fiber core head, an absorption layer and a reflection layer from bottom to top; the absorption layer comprises at least one metal column or is composed of metal particles;
the reflection layer is composed of graphene oxide or graphene, the graphene oxide or graphene is provided with two layers, an absorption cavity is constructed between the two layers of graphene or the two layers of graphene oxide, and an incident light field is limited in the absorption cavity.
2. The graphene oxide optical fiber head of claim 1, wherein the absorption layer comprises not less than one metal post; and two ends of the metal column are respectively connected with the absorption layer and the optical fiber core head.
3. The graphene oxide optical fiber head according to claim 2, wherein the metal posts are different in diameter; the distances between the metal posts are different.
4. The graphene oxide optical fiber head according to claim 2, wherein the metal posts include an outer layer metal post and an inner layer metal post; the outer metal pillar has a first characteristic height; the inner metal pillar has a second characteristic height; the first feature height is greater than the second feature height; the inner metal column is separated from the absorption layer.
5. The graphene oxide optical fiber head according to claim 1, wherein the absorption layer is composed of metal particles.
6. The graphene oxide fiber optic head of claim 2, wherein the metal posts are made of a noble metal material.
7. The graphene oxide fiber optic head of claim 5, wherein the metal particles are made of a noble metal material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583045.9A CN110286443B (en) | 2019-07-01 | 2019-07-01 | Graphene oxide optical fiber head |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910583045.9A CN110286443B (en) | 2019-07-01 | 2019-07-01 | Graphene oxide optical fiber head |
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| CN110286443A CN110286443A (en) | 2019-09-27 |
| CN110286443B true CN110286443B (en) | 2020-12-08 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249441A (en) * | 2016-09-22 | 2016-12-21 | 北京大学 | Graphene porous optical fiber electrooptic modulator |
| CN106841161A (en) * | 2017-01-12 | 2017-06-13 | 重庆大学 | Stress mornitoring and molecular recognition system based on graphene composite structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9863885B2 (en) * | 2015-10-07 | 2018-01-09 | The Regents Of The University Of Californa | Graphene-based multi-modal sensors |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249441A (en) * | 2016-09-22 | 2016-12-21 | 北京大学 | Graphene porous optical fiber electrooptic modulator |
| CN106841161A (en) * | 2017-01-12 | 2017-06-13 | 重庆大学 | Stress mornitoring and molecular recognition system based on graphene composite structure |
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Effective date of registration: 20201124 Address after: 454002 sujiazuo Industrial Park, Jiaozuo New District, Henan Province Applicant after: Jiaozuo Mingze Magnetic Industry Co., Ltd Address before: 528458 501, 4, 118, 118 Gui Shan commercial street, Zhongshan, Guangdong. Applicant before: ZHONGSHAN KELITE OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |
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