CN111208093A - Visible light absorption nano array and application thereof - Google Patents
Visible light absorption nano array and application thereof Download PDFInfo
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- CN111208093A CN111208093A CN201910262089.1A CN201910262089A CN111208093A CN 111208093 A CN111208093 A CN 111208093A CN 201910262089 A CN201910262089 A CN 201910262089A CN 111208093 A CN111208093 A CN 111208093A
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- G—PHYSICS
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- 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
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- 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
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- G—PHYSICS
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- 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
- G01N2021/258—Surface plasmon spectroscopy, e.g. micro- or nanoparticles in suspension
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- 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
- G01N2021/5903—Transmissivity using surface plasmon resonance [SPR], e.g. extraordinary optical transmission [EOT]
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Abstract
The invention relates to the technical field of nano composite materials, in particular to a visible light absorption nano array which is composed of periodically arranged nano columns, wherein a fixed structure period is arranged among the nano columns, and a medium among the nano columns is air. The invention overcomes the defect that the application of the visible light absorber is limited due to the narrow light absorption waveband in the prior art, and the nano array obtained by the invention can be effectively used for constructing a visible light absorption device with adjustable periodic frequency and adjustable wide frequency and can be used for researching the relation between plasma absorption and electromagnetic field resonance modes in the structure.
Description
Technical Field
The invention relates to the technical field of nano composite materials, in particular to a visible light absorption nano array and application thereof in a visible light absorption device.
Background
Research shows that when the structural size of the material is smaller than the wavelength of incident light, the interaction of the material and the light generates physical and chemical properties different from those of a bulk material macroscopically, and random spectrum clipping can be realized in the nanoscale regulation range. The maximum value can be reached according to the formula A =1-R-T, and the near-perfect absorption of the electromagnetic wave with the appointed wavelength or waveband can be realized by regulating and controlling the micro-nano structure surface plasma. The absorber based on the nano periodic structure has the advantages of high light energy utilization rate, adjustable bandwidth and easiness in integration, and has potential application prospects in the fields of photovoltaics, photoelectrons, sensing, detection, ink-free printing, photothermal converters and the like. For example, for anti-counterfeiting and structural color applications, near-perfect absorption of a single wavelength needs to be realized, and the peak position is sensitive and adjustable; aiming at the problem that the tricolor superposition principle of the printing industry cannot generate black and the problem that the photovoltaic industry has low utilization efficiency of solar energy, the wide-angle absorption function of the visible light broadband is required to be realized. Therefore, in the range of visible light wave band, realizing single wavelength or wide wave band near perfect absorption is a problem to be solved in the application field of visible light absorption devices.
The light absorber in the prior art (for example, chinese patent No. 201210146948.9) is generally a single flat dielectric film or waveguide film, and due to its structure, it can only couple with light with a specific wavelength, which makes it difficult to obtain light absorption in a wide wavelength band, and thus its application range is greatly limited compared to the light absorber with a wide wavelength band.
Disclosure of Invention
The invention provides a visible light absorption nano array which can have a wide spectrum absorption range and adjustable frequency and application thereof, aiming at overcoming the defect that the application of a visible light absorber in the prior art is limited due to the narrow light absorption waveband.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a visible light absorption nano array is composed of nano columns which are periodically arranged, a fixed structure period is arranged among the nano columns, and a medium among the nano columns is air.
Preferably, the shape, size and height of the nano-pillars in the nano-array are the same.
Preferably, the nano-pillar is in a cuboid, a cylinder or a cone shape.
Preferably, the nano-column is a cuboid, the length of the nano-column is 15-30 nm, the width of the nano-column is 15-30 nm, and the height of the nano-column is 200-2000 nm.
Preferably, the nano-pillar structure is a cuboid structure with the length, the width and the height of 20nm and 1800 nm.
Preferably, the structure period of the nano-pillars in the nano-array is 20-30 nm.
Use of a visible light absorbing nanoarray as described above in a visible light absorbing device.
The nano array in the invention has a large number of long-range equidistant nano gaps, equidistant plasma resonance sites can be constructed through the gaps, and the distribution forms of the resonance sites are different under the excitation of different excitation wavelengths. Through finite difference time domain method (FDTD) and theoretical calculation, the arrangement mode of resonance points in array gaps is increased along with the increase and decrease of the height of the structure, and macroscopically, the transmission peak position of the connected structure is increased. Therefore, a special optical structure with adjustable absorption frequency band and period can be constructed by adjusting the height of the array, and an absorption optical device with adjustable absorption frequency band and period can be constructed by utilizing the special optical performance of the structure.
Therefore, the invention has the following beneficial effects:
(1) the nano array has a wide spectrum absorption range and is adjustable in frequency;
(2) the invention can be used for constructing the absorber with adjustable absorption frequency band and period;
(3) the invention can be used for researching the relation between the plasma absorption and the electromagnetic field resonance mode in the structure.
Drawings
FIG. 1 is a schematic diagram of a periodic nanopillar array structure.
FIG. 2 is a simulated calculated height parameter scan transmission spectrum of the array.
FIG. 3 is a graph of transmittance spectra of structures with simulated calculated array heights of 200nm, 1000nm, 1800nm, respectively.
Detailed Description
The present invention will now be described in further detail with reference to specific examples, which are intended to represent only some, but not all, of the examples of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
As shown in fig. 1, a light absorber is composed of a visible light absorption nano array, the nano array is composed of cuboid nano columns which are periodically arranged and have the same shape, size and height, the length of the cuboid nano column is 20nm, the width of the cuboid nano column is 20nm, the height of the cuboid nano column is 200-2000 nm, the structural period of the structure of the nano column in the nano array is 25nm, and a medium between the nano columns is air.
Example 2
The utility model provides a visible light absorbs nanometer array, nanometer array constitute by the cylinder nanometer post that is the periodicity and arranges, and shape, size and height all the same, its diameter is 30nm, and the height is 200~2000nm, nanometer post structure in nanometer array 20nm of structural cycle, the medium between nanometer post be the air.
Example 3
The utility model provides a light absorber, its is formed by visible light absorption nanometer array, nanometer array by being the periodicity and arranging, and shape, size and highly the same cuboid nanometer post constitute, its length is 30nm, and the width is 15nm, highly is 200~2000nm, the structure cycle 20nm of nanometer post structure in nanometer array, the medium between the nanometer post be the air.
Example 4
The utility model provides a light absorber, its is formed by visible light absorption nanometer array, nanometer array by being the periodicity and arranging, and shape, size and highly the same cuboid nanometer post constitute, its length is 25nm, and the width is 20nm, highly is 200~2000nm, the structure cycle 30nm of nanometer post structure in nanometer array, the medium between the nanometer post be the air.
Theoretical simulation of the periodic nanorod array structure of the nano array obtained in example 1 was performed by using maxwell equation software for time domain solution provided by lumerical, canada, and a structural model diagram of the periodic nanorod array structure is shown in fig. 1. Then, a scanning transmission spectrum graph which changes with the height is calculated through scanning simulation of the height of the array, as shown in fig. 2, it can be seen from fig. 2 that the transmission intensity of the periodic nano-pillar array changes periodically along with the increase of the height of the array, the number of transmission peak positions of the structure increases along with the increase of the height of the array, and the transmission peak positions also move along with the change of the height of the array. We sliced the transmission spectra of the structures with heights of 200nm, 1000nm, 1800nm, respectively (see fig. 3). It can be seen that the transmission peaks of the structure have a significant amount of variation, and when the height of the array is high, the transmission intensity of the transmission spectrum changes periodically with the variation of the wavelength. In conclusion, the absorber with adjustable absorption frequency band and period can be constructed by the method, and the relation between the plasma absorption and the electromagnetic field resonance mode in the structure can be deeply researched by analyzing the change rule.
Claims (7)
1. The visible light absorption nano array is characterized in that the nano array is composed of nano columns which are periodically arranged, a fixed structure period is arranged among the nano columns, and a medium among the nano columns is air.
2. The visible light absorbing nanoarray of claim 1, wherein the nanopillars in the nanoarray are identical in shape, size, and height.
3. The visible light absorbing nanoarray of claim 2, wherein the nanocolumns are rectangular, cylindrical or tapered.
4. The visible light absorption nanoarray according to claim 1, 2 or 3, wherein the nanocolumn structure has a rectangular close-packed structure, a length of 15-30 nm, a width of 15-30 nm and a height of 200-2000 nm.
5. The visible light absorbing nanoarray of claim 4, wherein the nanopillars are rectangular parallelepiped structures with a length, a width and a height of 20nm and 1800 nm.
6. The visible light absorption nanoarray of claim 1, 2 or 3, wherein the nanopillars have a structural period of 20 to 30nm in the nanoarray.
7. Use of the visible light absorbing nanoarray as defined in claims 1 to 6 in a visible light absorbing device.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103149616A (en) * | 2013-01-31 | 2013-06-12 | 东北大学秦皇岛分校 | Reflective nanorod surface plasma optical filter |
| CN103513316A (en) * | 2013-09-29 | 2014-01-15 | 苏州大学 | Selective absorption filtering structure |
| US20150301361A1 (en) * | 2012-11-29 | 2015-10-22 | The University Of Birmingham | Optical Absorber |
| CN107111011A (en) * | 2017-03-29 | 2017-08-29 | 香港中文大学（深圳） | Perfect absorber |
| CN107515436A (en) * | 2017-09-29 | 2017-12-26 | 苏州大学 | A kind of visible ray broadband absorption structure and preparation method |
-
2019
- 2019-04-02 CN CN201910262089.1A patent/CN111208093A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150301361A1 (en) * | 2012-11-29 | 2015-10-22 | The University Of Birmingham | Optical Absorber |
| CN103149616A (en) * | 2013-01-31 | 2013-06-12 | 东北大学秦皇岛分校 | Reflective nanorod surface plasma optical filter |
| CN103513316A (en) * | 2013-09-29 | 2014-01-15 | 苏州大学 | Selective absorption filtering structure |
| CN107111011A (en) * | 2017-03-29 | 2017-08-29 | 香港中文大学（深圳） | Perfect absorber |
| CN107515436A (en) * | 2017-09-29 | 2017-12-26 | 苏州大学 | A kind of visible ray broadband absorption structure and preparation method |
Non-Patent Citations (2)
| Title |
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| 吕江涛等: "纳米柱表面等离子体共振的调制及其红外光谱增强特性研究", 《化学学报》 * |
| 吕江涛等: "超小间距纳米柱阵列中的谐振调制", 《物理学报》 * |
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Application publication date: 20200529 |