CN208206334U - One kind is by the modified high-sensitivity surface plasma resonator sensor of graphene - Google Patents
One kind is by the modified high-sensitivity surface plasma resonator sensor of graphene Download PDFInfo
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- CN208206334U CN208206334U CN201820810032.1U CN201820810032U CN208206334U CN 208206334 U CN208206334 U CN 208206334U CN 201820810032 U CN201820810032 U CN 201820810032U CN 208206334 U CN208206334 U CN 208206334U
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Abstract
The utility model discloses one kind by the modified high-sensitivity surface plasma resonator sensor of graphene, it is characterized in that, including the basal layer and metal layer to splice from bottom to top, the resonant cavity of perforation metal layer upper and lower surface is equipped in the metal layer, the bottom of the second straight wave guide that the periphery of resonant cavity is symmetrically arranged with the first straight wave guide of recess and is recessed, the first straight wave guide and the second straight wave guide is equipped with single-layer graphene and closely splices with basal layer.This surface plasma sensor is not only small in size, response is fast but also preparation process is simple, is provided simultaneously with the high feature of sensitivity, Q value, is able to achieve the nanoscale sensing of biology, medical science.
Description
Technical field
It is specifically a kind of by the modified highly sensitive table of graphene the utility model relates to optical communication technique and sensory field
Face plasma resonant vibration cavity sensor.
Background technique
Surface plasma excimer (Surface plasmon polariton, abbreviation SPP) is by changing metal surface
Sub-wavelength structure realize a kind of light wave and transportable surface charge between electromagnet mode, can support metal and medium interface
The surface plasma-wave of transmission.Device based on SPP is small with size, response is fast and is not limited by diffraction limit, this only
Special property makes it manipulate light energy, high sensor, high response and the fields such as diamagnetic interference in nanometer scale and plays
Vital effect.
" nanometer flash report " published " Planar Metamaterial Analogue of in 2010
An Electromagnetically Induced Transparency for Plasmonic Sensing " text, the research group
The transducer sensitivity that team proposes is up to 588 nmRIU-1.Then, in 2016, " Hybrid in " ACS nanometers "
Magnetoplasmonic Crystals Boost the Performance of Nanohole Arrays as
The achievable sensitivity enhancement sensor is mentioned in a Plasmonic Sensors " text to 659 nmRIU-1.Recently, with
The continuous development of surface plasma sensor, in " optics letter " " the Magnetic plasmons in a published in 2018
In a simple metallic nanogroove array for refractive index sensing " text, researcher
A kind of high sensitivity is proposed up to 1200 nmRIU-1Sensor.
However, present circumstances is seen, although researcher constantly promotes the sensitivity of sensor, sensing
The sensitivity of device is still lower, while the preparation method of sensor is excessively complicated, and it is very difficult to fill sensor information, it is difficult to
Meet the requirement of large-scale production.
Utility model content
The purpose of this utility model be in view of the deficiencies of the prior art, and provide one kind by the modified high sensitivity of graphene
Surface plasma resonant vibration cavity sensor.This surface plasma sensor is not only small in size, response is fast but also preparation process letter
It is single, it is provided simultaneously with the high feature of sensitivity, Q value, is able to achieve the nanoscale sensing of biology, medical science.
Realizing the technical solution of the utility model aim is:
One kind is by the modified high-sensitivity surface plasma resonator sensor of graphene, unlike the prior art,
Including the basal layer and metal layer to splice from bottom to top, the resonant cavity of perforation metal layer upper and lower surface is equipped in the metal layer,
The periphery of resonant cavity is symmetrically arranged with the first straight wave guide of recess and the second straight wave guide of recess, the first straight wave guide and the second straight wave guide
Bottom be equipped with single-layer graphene and closely splice with basal layer.
Temperature sensing medium in the resonant cavity is the fluent material with high thermo-optical coeffecient, the length and width ruler of resonant cavity
Very little adjustable, resonance wavelength and transmissivity carry out corresponding quantitative adjusting by adjusting the length and width size of resonant cavity, to reach
The performance of optically filtering.
The fermi level and carrier concentration of the graphene are adjustable, by the fermi level for changing graphene in straight wave guide
The resonance wavelength of sensor is realized with carrier concentration, to realize the application of the multi-wavelength work of sensor.
The basal layer is Si layers.
The metal layer is Ag layers.
This sensor is then existed by the method for etching by vapour deposition process deposited metal layer in silicon substrate layer
Resonant cavity is etched in metal layer, is symmetrical arranged the first straight wave guide and the second straight wave guide, finally, straight in the first straight wave guide and second
The bottom grown single-layer graphene of waveguide closely splices with basal layer.
Incident light is incident from the first straight wave guide or the second straight wave guide side, and emergent light is from the first straight wave guide or the second straight wave guide
The other side project, incident light use near infrared band light wave.
When light wave is from the first straight wave guide or the second straight wave guide side incidence, since waveguide two sides are metal Ag, so SPP can
To be excited by typical metal-insulator-metastructure structure, SPP, to propagation at resonant cavity, is meeting resonator cavity resonance frequency along waveguide
When rate, SPP can be coupled in resonant cavity, to further transmit toward the other side, still, when incident light wave length is unsatisfactory for resonance
When frequency, SPP is not excited then, and cannot be coupled to resonant cavity, and light wave ends in incident side waveguide.
Temperature sensing medium in resonant cavity, due to the refractive index and the linear relationship of temperature of liquid temperature sensing material, institute
Will lead to the refraction index changing of temperature sensing material when the change of environment temperature, so that condition of resonance is influenced, in conjunction with SPP dispersion
Linear relationship is presented in coupled wave theory, available resonance wavelength and temperature, i.e., as the temperature increases, resonance wavelength can occur red
It moves, the amount of red shift can also be precisely controlled according to structural parameters, that is, resonant cavity length and width, in practical applications, works as knot
When structure parameter is fixed, due to the change of environment temperature, the refractive index of sensing material can be made to change, and then influence resonance wave
Long variation measures the amount of movement of resonance wavelength by frequency spectrograph, then according to SPP dispersion coupled wave theory and full vector finite element
Theory can accurately obtain the temperature variation of environment.
This sensor accurately can be used to detect the minor change of environment temperature, and can be set as needed coupling
The wavelength and transmissivity of light after conjunction.
This sensor can be used for the fields such as the real time temperature sensing of nanometer scale.
This surface plasma sensor is not only small in size, response is fast but also preparation process is simple, is provided simultaneously with sensitive
The high feature of degree, Q value is able to achieve the nanoscale sensing of biology, medical science.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment.
In figure, 1. silicon substrate layer, 2. metal layer A g, 3. first 4. resonant cavity of the second straight wave guide of straight wave guide 3-1. 5. is single
Layer graphene.
Specific embodiment
The content of the present invention is further elaborated with reference to the accompanying drawings and examples, but is not to the utility model
Restriction.
Embodiment:
Referring to Fig.1, a kind of by the modified high-sensitivity surface plasma resonator sensor of graphene, including from bottom to top
The basal layer 1 and metal layer 2 to splice is equipped with the resonant cavity 4 of perforation 2 upper and lower surface of metal layer, resonant cavity 4 in the metal layer 2
Periphery be symmetrically arranged with the first straight wave guide 3 of recess and the second straight wave guide 3-1 of recess, the first straight wave guide 3 and the second straight wave guide
The bottom of 3-1 is equipped with single-layer graphene 5 and closely splices with basal layer 1.
Temperature sensing medium in the resonant cavity 4 is the fluent material with high thermo-optical coeffecient, and this example is sun caul-fat,
The length and width size adjustable of resonant cavity 4, resonance wavelength and transmissivity are carried out corresponding by adjusting the length and width size of resonant cavity 4
It is quantitative to adjust, to reach the performance of optically filtering.
The fermi level and carrier concentration of the graphene are adjustable, by the fermi level for changing graphene in straight wave guide
The resonance wavelength of sensor is realized with carrier concentration, to realize the application of the multi-wavelength work of sensor.
The basal layer 1 is Si layers.
The metal layer 2 is Ag layers.
This sensor then passes through the method for etching by vapour deposition process deposited metal layer 2 in silicon substrate layer 1
Resonant cavity 4 is etched in metal layer 2, is symmetrical arranged the first straight wave guide 3 and the second straight wave guide 3-1, finally, in the first straight wave guide
3 and second the bottom grown single-layer graphene of straight wave guide 3-1 closely splice with basal layer 1.
Incident light is incident from the first straight wave guide 3 or the second side straight wave guide 3-1, and emergent light is from the first straight wave guide 3 or the second
The other side of straight wave guide 3-1 is projected, and incident light uses the light wave of near infrared band.
When light wave is from the first straight wave guide 3 or the second straight wave guide 3-1 side incidence, since waveguide two sides are metal Ag, so
SPP can be excited by typical metal-insulator-metastructure structure, and SPP, to propagation at resonant cavity 4, is meeting resonant cavity along waveguide
When resonant frequency, SPP can be coupled in resonant cavity, to further transmit toward the other side, still, when incident light wave length is discontented
When sufficient resonance frequency, SPP is not excited then, and cannot be coupled to resonant cavity, and light wave ends in incident side waveguide.
Temperature sensing medium in resonant cavity 4, due to the refractive index and the linear relationship of temperature of liquid temperature sensing material, institute
Will lead to the refraction index changing of temperature sensing material when the change of environment temperature, so that condition of resonance is influenced, in conjunction with SPP dispersion
Linear relationship is presented in coupled wave theory, available resonance wavelength and temperature, i.e., as the temperature increases, resonance wavelength can occur red
It moves, the amount of red shift can also be precisely controlled according to structural parameters, that is, resonant cavity length and width, in practical applications, works as knot
When structure parameter is fixed, due to the change of environment temperature, the refractive index of sensing material can be made to change, and then influence resonance wave
Long variation measures the amount of movement of resonance wavelength by frequency spectrograph, then according to SPP dispersion coupled wave theory and full vector finite element
Theory can accurately obtain the temperature variation of environment.
This sensor accurately can be used to detect the minor change of environment temperature, and can be set as needed coupling
The wavelength and transmissivity of light after conjunction.
Claims (5)
1. one kind is by the modified high-sensitivity surface plasma resonator sensor of graphene, characterized in that including from bottom to top
The basal layer and metal layer to splice is equipped with the resonant cavity of perforation metal layer upper and lower surface, the periphery of resonant cavity in the metal layer
The bottom of the second straight wave guide for being symmetrically arranged with the first straight wave guide of recess and being recessed, the first straight wave guide and the second straight wave guide is equipped with
Single-layer graphene closely splices with basal layer.
2. according to claim 1 by the modified high-sensitivity surface plasma resonator sensor of graphene, feature
It is that the temperature sensing medium in the resonant cavity is the fluent material with high thermo-optical coeffecient, and the length and width size of resonant cavity can
It adjusts.
3. according to claim 1 by the modified high-sensitivity surface plasma resonator sensor of graphene, feature
It is that the fermi level and carrier concentration of the graphene are adjustable.
4. according to claim 1 by the modified high-sensitivity surface plasma resonator sensor of graphene, feature
It is that the basal layer is Si layers.
5. according to claim 1 by the modified high-sensitivity surface plasma resonator sensor of graphene, feature
It is that the metal layer is Ag layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820810032.1U CN208206334U (en) | 2018-05-29 | 2018-05-29 | One kind is by the modified high-sensitivity surface plasma resonator sensor of graphene |
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| CN201820810032.1U CN208206334U (en) | 2018-05-29 | 2018-05-29 | One kind is by the modified high-sensitivity surface plasma resonator sensor of graphene |
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| CN208206334U true CN208206334U (en) | 2018-12-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827481A (en) * | 2018-05-29 | 2018-11-16 | 广西师范大学 | One kind is by the modified high-sensitivity surface plasma resonator sensor of graphene |
| CN110243491A (en) * | 2019-07-02 | 2019-09-17 | 电子科技大学中山学院 | Temperature sensor based on waveguide structure |
| CN110376162A (en) * | 2019-07-16 | 2019-10-25 | 湖北工程学院 | A kind of graphene index sensor based on PIT effect |
-
2018
- 2018-05-29 CN CN201820810032.1U patent/CN208206334U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108827481A (en) * | 2018-05-29 | 2018-11-16 | 广西师范大学 | One kind is by the modified high-sensitivity surface plasma resonator sensor of graphene |
| CN110243491A (en) * | 2019-07-02 | 2019-09-17 | 电子科技大学中山学院 | Temperature sensor based on waveguide structure |
| CN110376162A (en) * | 2019-07-16 | 2019-10-25 | 湖北工程学院 | A kind of graphene index sensor based on PIT effect |
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