CN108827902B - Terahertz fingerprint detection sensitivity enhancing method based on nano antenna structure - Google Patents
Terahertz fingerprint detection sensitivity enhancing method based on nano antenna structure Download PDFInfo
- Publication number
- CN108827902B CN108827902B CN201810654069.4A CN201810654069A CN108827902B CN 108827902 B CN108827902 B CN 108827902B CN 201810654069 A CN201810654069 A CN 201810654069A CN 108827902 B CN108827902 B CN 108827902B
- Authority
- CN
- China
- Prior art keywords
- antenna structure
- terahertz
- substance
- nano
- nano antenna
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 48
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000035945 sensitivity Effects 0.000 title claims abstract description 24
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 33
- 239000013076 target substance Substances 0.000 claims abstract description 29
- 238000002834 transmittance Methods 0.000 claims abstract description 23
- 238000000411 transmission spectrum Methods 0.000 claims abstract description 18
- 230000005684 electric field Effects 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims description 14
- 230000005540 biological transmission Effects 0.000 claims description 8
- 239000000758 substrate Substances 0.000 claims description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000000737 periodic effect Effects 0.000 claims description 3
- 239000010453 quartz Substances 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 4
- GUBGYTABKSRVRQ-XLOQQCSPSA-N Alpha-Lactose Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@H]1O[C@@H]1[C@@H](CO)O[C@H](O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-XLOQQCSPSA-N 0.000 description 16
- 229930195727 α-lactose Natural products 0.000 description 11
- 238000010521 absorption reaction Methods 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 230000003993 interaction Effects 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- GUBGYTABKSRVRQ-QKKXKWKRSA-N Lactose Natural products OC[C@H]1O[C@@H](O[C@H]2[C@H](O)[C@@H](O)C(O)O[C@@H]2CO)[C@H](O)[C@@H](O)[C@H]1O GUBGYTABKSRVRQ-QKKXKWKRSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008101 lactose Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008093 supporting effect Effects 0.000 description 2
- 238000000862 absorption spectrum Methods 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 238000009396 hybridization Methods 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004611 spectroscopical analysis Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3581—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light using far infrared light; using Terahertz radiation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/59—Transmissivity
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Toxicology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
The invention relates to a method for enhancing terahertz fingerprint detection sensitivity based on a nano antenna structure, belonging to terahertz detectionThe technical field of measurement and application. A terahertz fingerprint detection sensitivity enhancing method based on a nano antenna structure comprises the following steps: step a, designing a nano antenna structure for detection; b, loading a substance to be detected on the surface of the nano antenna structure, and testing and recording a terahertz transmission spectrum of the substance to be detected on the surface of the nano antenna structure; and c, judging whether the target substance exists or not by analyzing the change of the transmittance of the terahertz transmission spectrum before and after the substance to be detected is loaded. Compared with the existing fingerprint detection method, the method aims at the 10 in the slit of the nano antenna structure5The detection sensitivity is greatly improved by two characteristics of magnitude electric field intensity and full-wave band high transmittance, and the identification and measurement of target substances with nanometer magnitude thickness are realized.
Description
Technical Field
The invention relates to a method for enhancing terahertz fingerprint detection sensitivity based on a nano antenna structure, and belongs to the technical field of terahertz detection application.
Background
Due to the fact that most biological molecules vibrate in a collective mode, rotation between molecules or in molecules generates resonance, and the absorption characteristic frequency of the resonance is located in a terahertz wave band, the type identification of various substances can be achieved through absorption spectrum fingerprints of the substances to terahertz waves, and the resonance is one of the most attractive places in terahertz application at present. In addition, the terahertz wave has the characteristics of low photon energy, weak radiation, transparency in most dielectric materials and the like, so that the terahertz wave has the unique advantages in safety detection, disease diagnosis and the like. However, since most of the molecular structure size and the absorption cross section are very small compared to terahertz waves (30-3000 μm), the strength of interaction of molecules with terahertz waves is very weak. In order to obtain a significant absorption effect, a sample with a larger volume or thicker size is often required, and the traditional terahertz fingerprint detection in transmission mode is to crush the substance to be detected into powder and press the powder into a sheet shape, and observe the powder by combining a terahertz spectrometer system (L.Ho, et al, Signatures and fingerprints, Nat.Photonics, Vol.2, No.9, pp.541-543,2008.). However, the thickness of a sample commonly used in the method is up to several millimeters, and the using amount is large, so that the application range of the terahertz wave fingerprint detection is limited. Researchers are dedicated to improving the sensitivity of terahertz fingerprint detection by using various methods, such as increasing the interaction area of electromagnetic waves and substances, improving the local electric field intensity, and the like. EIT effect between metamaterial and detecting molecule is proposed by P.Weis (P.Weis, et al, Hybridization induced reactivity in compositions of metamaterials and atomic media, Opt.express, Vol.19, No.23, pp.23573-23580,2011.) but the structure is simple and easy to process, fingerprint signal of lactose with thickness of 50 μm is still less than 10%, and sensitivity is still not high enough; J.Yang (J.J.Yang, et al, Broadband molecular sensing with a tapered waveguide, opt.express, Vol.23, No.7, pp.8583-8589,2015.) et al use a tapered waveguide structure to increase the interaction area of terahertz waves and the detection substance to improve the detection sensitivity, but adjusting the structural parameters is very complicated when adapting to the detection of other substances; x Shi (x.shi, et al, Enhanced terahertz finger print detection with ultra high sensitivity using the cavity defect model, Scientific Reports, vol.7, no 1, pp 13147.) and others utilize a microcavity resonance mode to improve detection sensitivity, and although detection of target substances with nanometer-scale thickness can be achieved, the requirements on the accuracy of the detection device are high, the operation difficulty is large, and the analysis process is complex.
Disclosure of Invention
The invention aims to provide a method for enhancing the sensitivity of terahertz fingerprint detection based on a nano antenna structure aiming at the problems in the prior art, and aims to solve the technical problem of how to improve the sensitivity of terahertz fingerprint detection.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a terahertz fingerprint detection sensitivity enhancing method based on a nano antenna structure comprises the following steps:
step a, designing a nano antenna structure for detection;
b, loading a substance to be detected on the surface of the nano antenna structure, and testing and recording a terahertz transmission spectrum of the substance to be detected on the surface of the nano antenna structure;
and c, judging whether the target substance exists or not by analyzing the change of the transmittance of the terahertz transmission spectrum before and after the substance to be detected is loaded.
The method comprises the following steps: the nano antenna structure is an approximate straight line with high transmissivity before loading the substance, and the transmissivity is reduced at the resonant frequency of the loaded substance after loading the substance, so that the nano antenna structure is formedThe target substance is identified, and the target substance is quantitatively analyzed by the degree of decrease in transmittance. The present invention is directed to the nano-antenna structure within the slit 105Compared with the prior fingerprint detection, the high sensitivity of the magnitude of electric field intensity to the target substance greatly improves the detection sensitivity, realizes the identification and measurement of the target substance with nanometer magnitude thickness, can realize the detection of various target substances without changing structural parameters, and is suitable for the high sensitivity detection of mixed solution.
The nano antenna structure adopted in the method has high transmittance and no resonance characteristic, and the characteristic fingerprint detection of the mixed solution with the nano-scale thickness can be realized by combining the analysis of the terahertz transmission spectrum, so that the method has the characteristics of high detection sensitivity, obvious fingerprint detection signal enhancement effect and the like.
Preferably, the nano-antenna structure in step a is a one-dimensional periodic slit structure on the metal thin film. The metal may be any kind of metal. In the terahertz band, any metal is similar to a perfect electric conductor.
Preferably, the slit structure has an aspect ratio of 104A recess of the order of magnitude having 10 in the region of the recess at terahertz incidence5Magnitude of electric field strength. The slit area has the characteristic of high electric field intensity, and the characteristic fingerprint detection with nanometer-level thickness can be realized. More preferably, the slit structure has a slit width d of 100nm, a metal thickness t of 50nm, and a one-dimensional period of 10 μm. The smaller the width of the slit structure is, the larger the one-dimensional period is, the larger the metal thickness is, and the stronger the electric field in the groove is.
Preferably, the antenna structure in step a is placed on a quartz substrate or a silicon substrate. The substrate has an absorption effect on terahertz waves, but has a supporting effect on the antenna structure and is beneficial to loading detection substances.
Preferably, in the step b, firstly, terahertz transmission spectrums of the nano antenna structure before and after the nano antenna structure is loaded with the substance to be detected are detected and recorded; and c, identifying the existence of the target substance by comparing the changes of the transmission spectrums of the nano antenna structures before and after the loading of the substance to be detected.
Preferably, in the step c, when the transmittance in the terahertz transmission spectrum is obviously reduced at the resonance frequency of the target substance, the target substance is indicated to be present; when the transmittance does not decrease significantly, it indicates that the substance to be detected is not the target substance.
Preferably, after the presence of the target substance is judged in the step c, the loading amount of the target substance is calculated by calculating the transmission decrease amount of the transmission spectrum at the resonance frequency of the target substance. The transmission reduction amount is related to the loading amount of the target substance, and the method can realize the type identification of the loading substance and can also realize the quantitative analysis of the loading substance when the loading substance is consistent with the target substance.
The invention has the beneficial effects that: compared with the existing fingerprint detection method, the method aims at the 10 in the slit of the nano antenna structure5The detection sensitivity is greatly improved by two characteristics of magnitude electric field intensity and full-wave band high transmittance, the identification and measurement of target substances with nanometer magnitude thickness are realized, meanwhile, the detection of various target substances can be realized without changing structural parameters, and the method is suitable for the high-sensitivity detection of mixed solutions.
Drawings
Fig. 1 is a schematic diagram of a nano-antenna structure, wherein PEC perfect electrical conductor, t metal thickness, d slit width, E electric field direction, H magnetic field direction, k incident terahertz wave direction;
in fig. 2 a) terahertz transmittance of the nano-antenna structure itself; b) the transmittance of the nano antenna structure when the surface is loaded with alpha-lactose with different thicknesses; c) the alpha-lactose permeability per se with different thicknesses; d) linear fitting relation between transmission difference and alpha-lactose thickness when the nano antenna is loaded with alpha-lactose with different thicknesses and without a nano antenna structure;
fig. 3 is a graph showing the transmittance of a mixed solution of two substances having a nano-antenna structure loaded with a resonance frequency of 0.529 and 0.7THz, respectively.
Detailed Description
The technical solution of the present invention is further specifically described below by way of specific examples in conjunction with the accompanying drawings. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.
In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified.
Example (b):
a terahertz fingerprint detection sensitivity enhancing method based on a nano antenna structure comprises the following specific steps:
step a, designing a nano antenna structure for detection;
b, loading a substance to be detected on the surface of the nano antenna structure, and testing and recording a terahertz transmission spectrum of the substance to be detected on the surface of the nano antenna structure;
and c, judging whether the target substance exists or not by analyzing the transmittance of the terahertz transmission spectrum.
The nano antenna structure is a one-dimensional periodic slit structure on a metal film. The slit structure has an aspect ratio of 104A recess of the order of magnitude having 10 in the region of the recess at terahertz incidence5Magnitude of electric field strength. The slit area has the characteristic of high electric field intensity, and the characteristic fingerprint detection with nanometer-level thickness can be realized. The metal may be any kind of metal. In the terahertz band, any metal approximates a perfect electrical conductor PEC. The antenna structure may be placed on a quartz substrate or a silicon substrate. The substrate has an absorption effect on terahertz waves, but has a supporting effect on the antenna structure and is beneficial to loading detection substances.
The schematic structural diagram of the nano-antenna structure is shown in fig. 1: the terahertz wave is vertically incident and forms 10 in the slit region5High magnitude electric fields. The transmittance is more than 90% and is approximately a straight line as can be seen from fig. 2(a) under the conditions that the slit width d is 100nm, the metal thickness t is 50nm and the period is 10 μm by simulating and adjusting the structural parameters through a numerical calculation method. After the surface of the nano antenna structure is loaded with alpha-lactose with different thicknesses, the transmittance graph is shown as the figure2 (b). The relative dielectric constant of a-lactose was characterized in simulations using the Lorentzian resonators (Lorentzian resonators) model:
wherein epsilon∞Background relative dielectric constant, ω, that is non-resonantpAnd gammapAngular frequency and damping rate, respectively, of the intrinsic absorption resonancepIs the oscillation intensity factor. For simple calculations, only the absorption of a-lactose at 0.529THz is considered, and other lorentz model parameters to better fit the experimental values are: epsilon∞＝3.145，γp＝1.59*1011rad/s,Δεp＝0.052(A.Roggenbuck,et al,Coherent broadband continuous-wave terahertz spectroscopy on solid-state samples,New J.Phys.Vol.12,no.4,pp.043017,2010)。
Due to the high electric field intensity of the slit region of the nano antenna structure, the absorption cross section of alpha-lactose is greatly increased, and even if the thickness of the alpha-lactose is only 150nm, the transmission spectrum of the whole structure is obviously reduced at 0.529THz, and is reduced from 96.95% to 81.64%, and is changed from 15.31%. As can be seen from fig. 2(d), the nano-antenna structure is loaded with a-lactose of different thickness, and the difference in transmittance with and without the structure is a linear function of its thickness. The difference in transmittance increases significantly with the thickness.
To compare the detection effect of the nano antenna structure enhanced fingerprint, fig. 2(c) simulates the transmittance curve of alpha-lactose itself with different thicknesses. As can be seen from fig. 2(c), the transmission attenuation of 150nm α -lactose at the resonance frequency is only 0.14%, and even if the thickness is increased to 200nm or even 250nm, the transmission attenuation is only 0.25% and 0.3%. While the transmittance attenuation through the nano-antenna structure loaded with 150nm thickness alpha-lactose is 15.31%, which is a 109-fold magnification compared to the transmittance change directly through 150nm thickness alpha-lactose.
In order to verify the identification characteristics of the method on the mixed solution, the inventor loads the mixed solution of lactose and another substance with the resonance frequency of 0.7THz on the surface of the nano-antenna structure. The transmittance curve of the nano-antenna structure loaded with the mixed solution having a thickness of 150nm is shown in fig. 3. It can be seen that significant transmission changes occur at the resonant frequencies of both solutes, 0.529 and 0.7 THz. This further demonstrates that the method is not only suitable for single species detection, but is equally effective for mixed solutions.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (4)
1. A terahertz fingerprint detection sensitivity enhancing method based on a nano antenna structure is characterized by comprising the following steps:
step a, designing a nano antenna structure for detection, wherein the nano antenna structure is a one-dimensional periodic slit structure on a metal film;
b, loading a substance to be detected on the surface of the nano antenna structure, and testing and recording a terahertz transmission spectrum of the substance to be detected on the surface of the nano antenna structure;
c, judging whether the target substance exists or not by analyzing the transmittance change of the terahertz transmission spectrum before and after the substance to be detected is loaded;
in the step b, firstly, detecting and recording terahertz transmission spectrums of the nano antenna structure before and after loading the substance to be detected; in the step c, the existence of the target substance is identified by comparing the changes of the transmission spectrums of the nano antenna structures before and after the substance to be detected is loaded;
in the step c, when the transmittance in the terahertz transmission spectrum is obviously reduced at the resonance frequency of the target substance, the existence of the target substance is indicated; when the transmittance does not obviously decrease, the substance to be detected is not the target substance;
and c, after the target substance is judged to be present in the step c, calculating the loading amount of the target substance by calculating the transmission reduction amount of the transmission spectrum at the resonant frequency of the target substance.
2. The method for enhancing the sensitivity of terahertz fingerprint detection based on the nano-antenna structure according to claim 1, characterized in that: the slit structure has an aspect ratio of 104A recess of the order of magnitude having 10 in the region of the recess at terahertz incidence5Magnitude of electric field strength.
3. The method for enhancing the sensitivity of terahertz fingerprint detection based on the nano-antenna structure as claimed in claim 2, wherein: the slit width d of the slit structure is 100nm, the metal thickness t is 50nm, and the one-dimensional period is 10 μm.
4. The method for enhancing the sensitivity of terahertz fingerprint detection based on the nano-antenna structure according to claim 1, characterized in that: the antenna structure in the step a is placed on a quartz substrate or a silicon substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654069.4A CN108827902B (en) | 2018-06-22 | 2018-06-22 | Terahertz fingerprint detection sensitivity enhancing method based on nano antenna structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810654069.4A CN108827902B (en) | 2018-06-22 | 2018-06-22 | Terahertz fingerprint detection sensitivity enhancing method based on nano antenna structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108827902A CN108827902A (en) | 2018-11-16 |
| CN108827902B true CN108827902B (en) | 2021-02-26 |
Family
ID=64137896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810654069.4A Expired - Fee Related CN108827902B (en) | 2018-06-22 | 2018-06-22 | Terahertz fingerprint detection sensitivity enhancing method based on nano antenna structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108827902B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115046958A (en) * | 2022-05-07 | 2022-09-13 | 中国计量大学 | Terahertz super-surface enhanced fingerprint detection method based on incident angle scanning |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590986B (en) * | 2016-03-16 | 2017-01-18 | 侯皓文 | Room temperature terahertz detector based on gallium nitride high electron mobility transistor and preparation method thereof |
| CN107064052B (en) * | 2017-04-26 | 2019-12-27 | 中国计量大学 | Terahertz fingerprint detection sensitivity enhancement method based on microcavity resonance mode |
-
2018
- 2018-06-22 CN CN201810654069.4A patent/CN108827902B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108827902A (en) | 2018-11-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Seo et al. | Terahertz biochemical molecule‐specific sensors | |
| Manera et al. | Magneto-Optical properties of noble-metal nanostructures: functional nanomaterials for bio sensing | |
| Wang et al. | Wafer-scale metasurface for total power absorption, local field enhancement and single molecule Raman spectroscopy | |
| Johns et al. | Direct observation of narrow mid-infrared plasmon linewidths of single metal oxide nanocrystals | |
| Gong et al. | Thickness dispersion of surface plasmon of Ag nano-thin films: Determination by ellipsometry iterated with transmittance method | |
| Cheng et al. | Ultrasensitive detection and characterization of molecules with infrared plasmonic metamaterials | |
| Yoo et al. | Enhancement of chiroptical signals by circular differential Mie scattering of nanoparticles | |
| Chen et al. | Tunable nanoantennas for surface enhanced infrared absorption spectroscopy by colloidal lithography and post-fabrication etching | |
| CN107064052B (en) | Terahertz fingerprint detection sensitivity enhancement method based on microcavity resonance mode | |
| Shafi et al. | Highly efficient SERS substrates with different Ag interparticle nanogaps based on hyperbolic metamaterials | |
| Humbert et al. | Optical spectroscopy of functionalized gold nanoparticles assemblies as a function of the surface coverage | |
| Tsalu et al. | Homogeneous localized surface plasmon resonance inflection points for enhanced sensitivity and tracking plasmon damping in single gold bipyramids | |
| Jung et al. | Fano metamaterials on nanopedestals for plasmon-enhanced infrared spectroscopy | |
| CN108827902B (en) | Terahertz fingerprint detection sensitivity enhancing method based on nano antenna structure | |
| Al-Naib | Evaluation of amplitude difference referencing technique with terahertz metasurfaces for sub-micron analytes sensing | |
| Ho et al. | A solution-based nano-plasmonic sensing technique by using gold nanorods | |
| Cheng et al. | Terahertz ultrasensitive biosensing metamaterial and metasurface based on spoof surface plasmon polaritons | |
| Weis et al. | Surface‐enhanced Raman spectra on graphene | |
| Peli et al. | Discrimination of molecular thin films by surface-sensitive time-resolved optical spectroscopy | |
| CN115046958A (en) | Terahertz super-surface enhanced fingerprint detection method based on incident angle scanning | |
| Jen et al. | Near-field simulation of obliquely deposited surface-enhanced Raman scattering substrates | |
| CN109187420A (en) | Enhance the plate aerial detection device and its detection method of fingerprint detection sensitivity | |
| Fen et al. | Real-time monitoring of lead ion interaction on gold/chitosan surface using surface plasmon resonance spectroscopy | |
| Wang et al. | High-sensitivity detection of trace imidacloprid and tetracycline hydrochloride by multi-frequency resonance metamaterials | |
| Yang et al. | Enhanced trace amount terahertz fingerprint spectroscopy using symmetrical spoof surface plasmon metasurfaces |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210226 |