CN208834018U - The combined metal nanometer thin film chirality optical device of double structure - Google Patents
The combined metal nanometer thin film chirality optical device of double structure Download PDFInfo
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- CN208834018U CN208834018U CN201820971142.6U CN201820971142U CN208834018U CN 208834018 U CN208834018 U CN 208834018U CN 201820971142 U CN201820971142 U CN 201820971142U CN 208834018 U CN208834018 U CN 208834018U
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Abstract
The utility model relates to a kind of combined metal nanometer thin film chirality optical devices of double structure, comprising: substrate and the chiral structure two-dimensional array in substrate；Chiral structure two-dimensional array includes multiple chiral building blocks；Chiral building block includes metal film, the U-typed being provided on metal film seam and " one " word seam.The combined metal nanometer thin film chirality optical device of the double structure of the utility model embodiment, using the chiral structure two-dimensional array being made of multiple double structure metal nanometer thin film chiral building blocks, one " one " word of addition stitches chiral building block again on the foundation structure that single U-typed is stitched, more magnetic dipoles are produced near " one " word seam, compared to the chiral optical device of the existing chiral structure two-dimensional array with single structure chiral building block composition, circular dichroism is significantly enhanced.
Description
Technical field
The utility model relates to optical field, in particular to a kind of combined metal nanometer thin film chirality optics device of double structure
Part.
Background technique
Chirality refers to the property that structure cannot be overlapped with its mirror image, and chiral structure is prevalent in the Nature, such as egg
The large biological molecules such as white matter, carbohydrate and DNA, chirality play a key role in biochemistry and life concern, therefore right
The chiral analysis of chiral molecules is most important.
The most directly effective technology of molecular chiral analysis at present is circular dichroism spectra, and the principle of the technology is chiral molecules to a left side
The absorption of right-hand circularly polarized light is different.When a certain chiral sample of the monochromatic left-handed circularly polarized light irradiation with dextrorotation, the chirality sample
Product are different to the absorption of left-right rotary circularly polarized light, and this chiral molecules absorbs difference at different wavelengths and is known as circular dichroism spectra.
Chirality can be divided into according to its design feature: inherent chiral and external chirality.Inherent chiral i.e. structure itself has
Chirality, external chirality refers to the chirality that structure is constituted together with incident light.
In the research of chiral molecules asymmetry, when left circularly polarized light and right-circularly polarized light incidence, chiral material
Material can show different effective refractive indexs and spread speed is also different.When Meta Materials have extremely strong chirality, or even can present
Negative index out, material with negative refractive index are also referred to as chiral Meta Materials.Can be stealthy to object progress using material with negative refractive index,
It realizes and breaks through subwavelength resolution imaging of diffraction limit etc..This is for fields such as physics, engineering science, optics and materialogies
Research be possible to generate great influence.Therefore electromagnetism and optical field forefront are become for the research of chiral structure
Research topic.It, can be real by designing two-dimensional metallic film chiral structure in the chiral structural research of the prior art
The now modulation to light beam polarization characteristic or for detecting the circular dichroism spectra of chiral material, but when detected signal itself compares
When faint, obtained circular dichroism spectra signal is unobvious, i.e., detection effect is not so good.
Utility model content
Therefore, to solve technological deficiency and deficiency of the existing technology, the utility model proposes a kind of combinations of double structure
Type metal nanometer thin film chirality optical device.
Specifically, the combined metal nanometer thin film chirality optics of a kind of double structure that the utility model one embodiment proposes
Device, comprising:
Substrate and the chiral structure two-dimensional array in substrate；
Chiral structure two-dimensional array includes multiple chiral building blocks；
Chiral building block includes metal film, the U-typed being provided on metal film seam and " one " word seam.
In one embodiment of the utility model, in chiral structure two-dimensional array, several chiral building blocks are transversely
The period 1 of arrangement is equal to the second round being arranged in the vertical direction.
In one embodiment of the utility model, " one " word seam is located at the side of U-typed seam, the lower arm with U-typed seam
Length is placed in parallel.
In one embodiment of the utility model, the material of metal film is gold, with a thickness of 20nm~100nm.
Based on this, the utility model has following advantage:
The combined metal nanometer thin film chirality optical device of the double structure of the utility model embodiment, using by multiple binodes
The chiral structure two-dimensional array of structure metal nanometer thin film chiral building block composition, chiral building block are stitched in single U-typed
One " one " word of addition stitches again on foundation structure, more magnetic dipoles is produced near " one " word seam, compared to existing
The chiral optical device of chiral structure two-dimensional array with single structure chiral building block composition, significantly enhances circular dichroism
Property.
Through the following detailed description with reference to the accompanying drawings, the other aspects and feature of the utility model become obvious.But it answers
When knowing, which is only the purpose design explained, not as the restriction of the scope of the utility model, this is because its
It should refer to appended claims.It should also be noted that unless otherwise noted, it is not necessary to which scale attached drawing, they are only
Try hard to conceptually illustrate structure and process described herein.
Detailed description of the invention
Below in conjunction with attached drawing, specific embodiment of the present utility model is described in detail.
Fig. 1 is a kind of combined metal nanometer thin film chirality optical device of double structure provided by the embodiment of the utility model
Structural schematic diagram.
Fig. 2 is the structural schematic diagram of chiral building block provided by the embodiment of the utility model.
Fig. 3 is the schematic illustration that chiral building block provided by the embodiment of the utility model generates circular dichroism.
Fig. 4 (a) and Fig. 4 (b) is existing chiral building block and chiral structure list provided by the embodiment of the utility model
The Structure Comparison figure of member.
Fig. 5 is the circle two that existing chiral building block and chiral building block provided by the embodiment of the utility model generate
The comparison diagram of chromatography.
Specific embodiment
To keep the above objects, features, and advantages of the utility model more obvious and easy to understand, with reference to the accompanying drawing to this
The specific embodiment of utility model is described in detail.
Embodiment one
Referring to Figure 1, Fig. 1 is that the combined metal nanometer thin film of a kind of double structure provided by the embodiment of the utility model is chiral
The structural schematic diagram of optical device.The optical device includes: substrate 11 and chiral structure two-dimensional array 12.
The material of substrate 11 uses the material for having high transmittance to optical band used, such as silica, quartz, thickness
It is 200 μm~500 μm.
Chiral structure two-dimensional array 12 includes several evenly distributed chiral building blocks 13, chiral structure two-dimensional array 12
In, the period 1 that chiral building block 13 is arranged in the horizontal direction is Px, the second round being arranged in the vertical direction is Py.Chiral structure two
The shape of dimension array 12 can be the array of circular array, square array or other shapes, with specific reference to preparation process, material used
The shape feature of light beam determines in material and applied optical system.The size of chiral structure two-dimensional array 12 is with specific reference to entering
The size of hot spot is penetrated to determine, if square array, then the number of the chiral building block 13 of horizontal and vertical arrangement is at least
It is 500, if circular array, then the number of the chiral building block 13 of diametrical direction arrangement is at least 500.
In one embodiment of the utility model, the base of the combined metal nanometer thin film chirality optical device of the double structure
Bottom 11 uses silica, with a thickness of 200 μm；Chiral structure two-dimensional array 12 is square array, the hand of horizontal and vertical arrangement
Property structural unit 13 number be 1000, the period 1 being arranged in the horizontal direction is equal to second round for being arranged in the vertical direction, is
Px=Py=500nm.
Fig. 2 is referred to, Fig. 2 is the structural schematic diagram of chiral building block provided by the embodiment of the utility model.The chirality
Structural unit 13 includes: metal film 21, the U-typed being provided on metal film seam 22 and " one " word seam 23.U-typed stitches 22 Hes
" one " word seam 23 penetrates metal film upper and lower surface, and through-hole is formed on metal film.
The shape of metal film 21 be it is rectangular, there is the first side length and the second side length, the size of the first side length is equal to chiral knot
The period 1 P of structure two-dimensional array 12x, the size of the second side length is equal to the second round P of chiral structure two-dimensional array 12y, first
The magnitude range of side length and the second side length is 400nm~1000nm.Metal film with a thickness of T, range is 20nm~100nm.
The material of metal film 21 uses good conductor, such as gold, silver, copper, aluminium noble metal.
U-typed seam 22 includes that three brachiums are that left arm is long, the long and lower brachiums of right arm, and left arm is long, the long and lower brachium of right arm
Length is respectively l1、l2、l3, length range is 100nm~300nm, and three brachiums can be equal, can not also wait, three brachiums
Width having the same is w, and magnitude range is 30nm~50nm.
" one " word seam 23 is set to the side of U-typed seam 22, is placed in parallel with the lower brachium of U-typed seam 22." one " word seam
It may be disposed at the first position concordant with the lower end of U-typed seam, or be set to the second position concordant with the upper end of U-typed seam,
Or it is set to any position between first position and the second position.The length l of " one " word seam 234With three of U-typed seam 22
The similar length of brachium, be 100nm~300nm, with U-typed stitch 22 width having the same be w, magnitude range be 30nm~
50nm。
Be divided into d between U-typed seam 22 and " one " word seam, interval d is close with the magnitude range of width w, for 30nm~
50nm。
In one embodiment of the utility model, for metal film 21 using golden material, the first side length and the second side length are equal,
For Px=Py=500nm；Metal film with a thickness of T=30nm；Three brachiums of U-typed seam 22 are equal, are l1=l2=l3=
200nm, width w=40nm；" one " word seams the first position for being placed in U-typed seam right side, length l4=180nm, width
It is equal with U-typed slit width degree, it is w=40nm；D=40nm is divided between U-typed seam and " one " word seam.
Fig. 3 is referred to, Fig. 3 is that the chiral building block of the utility model embodiment generates the principle signal of circular dichroism
Figure.When a branch of left-hand polarization light (left circularly polarized, LCP) from chiral building block front incident, warp
After crossing the chiral building block, the transmissivity of the left-hand polarization light received is T--, as a branch of right-handed polarized light (right
Circularly polarized, RCP) it is incident from chiral building block front, after the chiral building block, receive
Right-handed polarized light transmissivity be T++, wherein subscript " -- " is expressed as left-hand polarization light, and " ++ " is expressed as right-handed polarized light, then
The circular dichroism of the chiral building block can indicate are as follows:
CD=T++-T--(1)
The transmissivity of left-hand polarization light and right-handed polarized light after chiral building block is different, i.e. T++≠T--,
Therefore, the size of CD represents the power of the circular dichroism of chiral building block.
Fig. 4 is referred to, Fig. 4 is existing chiral building block and chiral building block provided by the embodiment of the utility model
Structure Comparison figure.Fig. 4 (a) is the chiral building block of the prior art, and it includes single U-typed seam, Fig. 4 (b) is that this is practical
The chiral building block of new embodiment, it includes U-typed seams and " one " word seam.
Please also refer to Fig. 5, Fig. 5 is existing chiral building block and chiral structure provided by the embodiment of the utility model
The comparison diagram for the circular dichroism spectra that unit generates.Make a branch of left circularly polarized light in Z-X plane, along negative with X-axis negative direction and Z axis
Angular separation is to detect in 45 degree of direction oblique incidence to chiral building block in the exit facet side of chiral building block
To the transmissivity T of left circularly polarized light--；Make a branch of right-circularly polarized light in Z-X plane again, along negative with X-axis negative direction and Z axis
Angular separation is to detect in 45 degree of direction oblique incidence to chiral building block in the exit facet side of chiral building block
To the transmissivity T of right-circularly polarized light++；The circular dichroism generated according to the chiral building block that formula (1) can be calculated
Spectrum.
In Fig. 5, square point curve indicates the circular dichroism that the existing chiral building block with single U-typed seam generates
Spectrum, circle point curve indicate the circle that the chiral building block with U-typed seam plus " one " word seam of the utility model embodiment generates
Two chromatographies.As can be seen that the circular dichroism spectra that the chiral structure only with single U-typed seam generates is in wavelength X1=590nm, λ2=
740nm、λ3=860nm, λ4=960nm, λ5Nearby there is CD signal in=1690nm, signal magnitude is followed successively by 0.6%, 8%,
8%, 4.8%, 12%, and the circular dichroism spectra that the chiral structure with U-typed seam plus " one " word seam generates is in wavelength X1=
590nm、λ2=760nm, λ3=910nm, λ4=1020nm, λ5Nearby there is CD signal in=1710nm, and signal magnitude is followed successively by
3%, 14.9%, 24.6%, 12.7%, 12.5%.Illustrate after U-typed stitches side addition " one " word seam, the CD signal of generation
It is significantly increased.The reason is that the addition of " one " word seam changes the current direction on U-typed seam surrounding metal film,
There is magnetic dipole at " one " word seam, enhances circular dichroism.
In conclusion the combined metal nanometer thin film chirality optical device of the double structure of the utility model embodiment, uses
The chiral structure two-dimensional array being made of multiple double structure metal nanometer thin film chiral building blocks, chiral building block is single
One " one " word of addition stitches again on the foundation structure of U-typed seam, produces more magnetic dipoles, phase near " one " word seam
Than the chiral optical device of the existing chiral structure two-dimensional array with single structure chiral building block composition, significantly enhance
Circular dichroism.
In conclusion specific case used herein is to the combined metal nanometer thin film hand of the double structure of the utility model
Property optical device is expounded, the method and its core of the above embodiments are only used to help understand the utility model
Thought；At the same time, for those skilled in the art, based on the idea of the present invention, in specific embodiment and application
There will be changes in range, in conclusion the content of the present specification should not be construed as a limitation of the present invention, this is practical
Novel protection scope should be subject to the attached claims.
Claims (4)
1. a kind of combined metal nanometer thin film chirality optical device of double structure characterized by comprising substrate and be located at described
Chiral structure two-dimensional array in substrate；
The chiral structure two-dimensional array includes several chiral building blocks；
The chiral building block includes metal film, the U-typed being provided on metal film seam and " one " word seam.
2. the combined metal nanometer thin film chirality optical device of double structure according to claim 1, which is characterized in that described
In chiral structure two-dimensional array, period 1 that several chiral building blocks are arranged in the horizontal direction is equal to the be arranged in the vertical direction
Two cycles.
3. the combined metal nanometer thin film chirality optical device of double structure according to claim 1, which is characterized in that described
" one " word seam is located at the side of U-typed seam, is placed in parallel with the lower brachium of U-typed seam.
4. the combined metal nanometer thin film chirality optical device of double structure according to claim 1, which is characterized in that described
The material of metal film is gold, with a thickness of 20nm~100nm.
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| CN201820971142.6U CN208834018U (en) | 2018-06-22 | 2018-06-22 | The combined metal nanometer thin film chirality optical device of double structure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873365A (en) * | 2018-06-22 | 2018-11-23 | 西安科锐盛创新科技有限公司 | The combined metal nanometer thin film chirality optical device of double structure |
| CN110531446A (en) * | 2019-09-05 | 2019-12-03 | 陕西师范大学 | A kind of U-shaped structure and preparation method thereof for realizing circular dichroism |
-
2018
- 2018-06-22 CN CN201820971142.6U patent/CN208834018U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873365A (en) * | 2018-06-22 | 2018-11-23 | 西安科锐盛创新科技有限公司 | The combined metal nanometer thin film chirality optical device of double structure |
| CN108873365B (en) * | 2018-06-22 | 2021-01-08 | 浙江奇翼特种服装有限公司 | Double-structure combined metal nano-film chiral optical device |
| CN110531446A (en) * | 2019-09-05 | 2019-12-03 | 陕西师范大学 | A kind of U-shaped structure and preparation method thereof for realizing circular dichroism |
| CN110531446B (en) * | 2019-09-05 | 2021-03-09 | 陕西师范大学 | U-shaped structure for realizing circular dichroism and preparation method thereof |
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Effective date of registration: 20190505 Address after: Units A and B of 3 Workshops at 55 Feidu Road, Nicheng Town, Pudong New Area, Shanghai, 201306 Patentee after: Shanghai wasp Laser Technology Co., Ltd. Address before: 710065 Xi'an new hi tech Zone, Shaanxi, No. 86 Gaoxin Road, No. second, 1 units, 22 stories, 12202 rooms, 51, B block. Patentee before: Xi'an CREE Sheng Creative Technology Limited |
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Granted publication date: 20190507 Termination date: 20210622 |
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