CN208752320U - A kind of chiral metal nano thin-film optical texture - Google Patents
A kind of chiral metal nano thin-film optical texture Download PDFInfo
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- CN208752320U CN208752320U CN201820970981.6U CN201820970981U CN208752320U CN 208752320 U CN208752320 U CN 208752320U CN 201820970981 U CN201820970981 U CN 201820970981U CN 208752320 U CN208752320 U CN 208752320U
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Abstract
The utility model belongs to optical field, and in particular to a kind of chiral metal nano thin-film optical texture, including metal film, " V " font seam and transverse joint；" V " the font seam and the transverse joint are provided on the metal film；The transverse joint is provided with the side of " V " the font seam.The oblique incidence that the utility model introduces light is prepared for a kind of chiral metal nano thin-film optical texture, by adding a transverse joint on the membrane structure circular dichroism is greatly enhanced.
Description
Technical field
The utility model belongs to optical field, and in particular to a kind of chiral metal nano thin-film optical texture.
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.Chiral basis
Its design feature can be divided into: inherent chiral and external chirality.The chirality that inherent chiral i.e. structure itself has, external chirality refer to
The chirality that structure is constituted together with incident light.
Circular dichroism (Circular Dichroism, CD) is research one highly important means of chipal compounds.?
In the research of chiral molecules asymmetry, when left circularly polarized light (left circularly polarized, LCP) and dextrorotation
When circularly polarized light (right circularly polarized, RCP) is incident, chiral material can show different effective refractions
Rate and spread speed is also different.When Meta Materials have extremely strong chirality, or even negative index, material with negative refractive index can be showed
Referred to as chiral Meta Materials.Stealthy, the sub-wavelength of realization breakthrough diffraction limit can be carried out to object using material with negative refractive index
Resolution imaging.This is possible to generate great influence for the research in the fields such as physics, engineering science, optics and materialogy.
Therefore become the research topic of electromagnetism and optical field forefront for the research of chiral structure.The chiral knot of the prior art
In structure research, modulation or use to light beam polarization characteristic may be implemented by designing two-dimensional metallic film chiral structure
Unobvious come the circular dichroism spectra signal that detects chiral material, detection effect is poor.
Utility model content
In order to solve the above-mentioned problems in the prior art, the utility model provides a kind of chiral metal nanometer
Film Optics structure.The technical problems to be solved in the utility model is achieved through the following technical solutions:
A kind of chiral metal nano thin-film optical texture, including metal film, " V " font seam and transverse joint；
" V " the font seam and the transverse joint are provided on the metal film；
The transverse joint is provided with the side of " V " the font seam.
In a specific embodiment, described " V " the font seam includes left arm and right arm, and the left arm and the right arm are equal
For rectangular configuration；Wherein one end of the left arm is connected with one end of the right arm, and is formed in junction with the first length
Outer bottom edge and the second length interior bottom edge, and first length be greater than second length.
In a specific embodiment, the metal film is rectangular configuration, and the first side length of the metal film is
400nm-1000nm, the second side length of the metal film are 400nm-1000nm.
In a specific embodiment, the thickness range of the metal film is 20nm-100nm.
Compared with prior art, the utility model has the beneficial effects that
The oblique incidence that the utility model introduces light is prepared for a kind of chiral metal nano thin-film optical texture, by " V "
It adds a transverse joint and circular dichroism is greatly enhanced in font seam side.
The utility model is described in further details below with reference to accompanying drawings and embodiments.
Detailed description of the invention
Fig. 1 is chiral metal nano thin-film optical texture schematic diagram provided by the utility model；
Fig. 2 is the schematic diagram that chiral metal nano thin-film optical texture provided by the utility model generates circular dichroism；
Fig. 3 is two kinds of chiral metals nano thin-film optical texture schematic diagram provided by the utility model；
Fig. 4 is the circular dichroism spectrogram that two kinds of chiral metals nano thin-film optical texture provided by the utility model generates.
Appended drawing reference:
11- metal film, 12- " V " font seam, 13- transverse joint.
Specific embodiment
Reach the technical means and efficacy that predetermined purpose is taken for the utility model is further described, below in conjunction with attached drawing
And embodiment, to specific embodiment of the present utility model, structure feature and its effect, detailed description are as follows.
Embodiment 1
Referring to Figure 1, Fig. 1 is a kind of chiral metal nano thin-film optical texture schematic diagram provided by the utility model.Hand
Property metal nanometer thin film optical texture include: metal film, " V " font seam and transverse joint；" V " the font seam and the transverse joint open up
On the metal film；The transverse joint is provided with the side of " V " the font seam.
In a specific embodiment, described " V " the font seam includes left arm and right arm, and the left arm and the right arm are equal
For rectangular configuration；Wherein one end of the left arm is connected with one end of the right arm, and is formed in junction with the first length
Outer bottom edge and the second length interior bottom edge, and first length is greater than second length, wherein the left arm and described
The first end of right arm can be respective any end, and the length of the length of the left arm and the right arm is l1, l1Range
It is 100nm- 300nm；The width of the left arm, the width of the right arm, first length are w1, w1Range be 30-
50nm；Second length is w2, w2Range be 10nm-30nm.
In a specific embodiment, transverse joint 13 is line-styled transverse joint, and the length of transverse joint 13 is l2, l2Range be
100nm-300nm；The width of the transverse joint 13 is w3, w3Range be 30nm- 50nm
In the two-dimensional surface X-Y of three-dimensional space X-Y-Z, " V " font seam 12 and transverse joint 13 are evenly arranged on metal film,
The period 1 of arrangement in X direction is Px, and the second round along the arrangement of Y-direction is Py.
In a specific embodiment, the metal film is rectangular configuration, and the first side length of the metal film is equal to
Period 1 Px, magnitude range are 400nm-1000nm, and the second side length of the metal film is equal to second round Py, magnitude range
It is 400nm-1000nm.Wherein Px is vertical with Py, only with the direction description in Fig. 1, the first side length and the second side in the present embodiment
Length can be equal or unequal, and metal film uses good conductor, and the thickness range of metal film is 20nm-100nm, this is practical new
The structure that type embodiment provides can replace other noble metals such as gold, silver using metal material of copper, greatly reduce the structure
Material cost.
" V " font stitches the other end of 12 right arms, i.e., in the direction Px between the one end not connecting with left arm and transverse joint 13
On distance be l3, it is spaced l3Width and width w1Magnitude range it is close, be 30nm~50nm.
In the present embodiment, the description that the left arm and right arm of description only carry out referring to Fig.1, in actual manufacturing process
In, defined herein right arm is also possible to left arm as seen in Figure 1.
Preferably, in one embodiment of the utility model, metal film uses copper product, the first side length and the second side length
It is equal, length Px=Py=500nm；The thickness of metal film 11, " V " font seam 12 and transverse joint 13 is 30nm；" V " font seam
12 two brachiums are equal, l1=l2=200nm, width w1=40nm；The length of transverse joint 13 is l2=180nm, transverse joint 13
Width is equal with the width of " V " font seam 12, which is w1=40nm；It is l that " V " font, which stitches the distance between 12 and transverse joint 13,3
=w1=40nm.
Embodiment 2
Fig. 2 is referred to, Fig. 2 is that chiral metal nano thin-film optical texture provided by the utility model generates circular dichroism
Schematic diagram.On the basis of the above embodiments, the chiral metal nanometer thin film optical texture of emphasis generates circular dichroism to the present embodiment
The principle of property is described in detail.
When a branch of left-hand polarization light (left circularly polarized, LCP) is from chiral metal nano thin-film optics
Structure front is incident, and after chiral metal nano thin-film optical texture, the transmissivity of the left-hand polarization light received is T--, when
A branch of right-handed polarized light (right circularly polarized, RCP) is positive from chiral metal nano thin-film optical texture
Incidence, after chiral metal nano thin-film optical texture, the transmissivity of the right-handed polarized light received is T++, wherein subscript
" -- " is expressed as left-hand polarization light, and " ++ " is expressed as right-handed polarized light, then the circular dichroism of chiral metal nano thin-film optical texture
Property can indicate are as follows:
CD=T++-T--
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 metal nano thin-film optical texture.
Preferably, Fig. 3 is referred to, Fig. 3 is that two kinds of chiral metals nano thin-film optical texture provided by the utility model shows
It is intended to；Fig. 4 is referred to, Fig. 4 is the circular dichroism that two kinds of chiral metals nano thin-film optical texture provided by the utility model generates
Spectrogram.In one embodiment of the utility model, polarised light allows left-hand polarization light and right-handed polarized light edge in Z-X plane
The negative direction of X and Z, oblique incidence is distinguished to the chiral metal nano thin-film optical texture and increasing for not increasing transverse joint with 45° angle
Add on two kinds of chiral metal nano thin-film optical textures of transverse joint, obtains the comparison of two kinds of chiral metal nano thin-film optical textures
CD spectrogram, wherein circular mark is the CD spectrum curve for not increasing the chiral metal nano thin-film optical texture of transverse joint, is referred to
Table 1, table 1 are that not increase the CD value of the chiral metal nano thin-film optical texture of transverse joint in the light incidence of different wave length corresponding
Table.
| Incident wavelength λ | CD value |
| 920nm | 2% |
| 1280nm | 5.7% |
Table 1
Box refers to table 2, table labeled as the CD spectrum curve for the chiral metal nano thin-film optical texture for increasing transverse joint
2 be that CD value of the chiral metal nano thin-film optical texture of increase transverse joint in the light incidence of different wave length corresponds to table.
| Incident wavelength λ | CD value |
| 770nm | 6% |
| 860nm | 1% |
| 890nm | 6.5% |
| 950nm | 5.5% |
| 1280nm | 6.5% |
Table 2
It being compared by table 1 and table 2 it is known that after adding transverse joint, CD signal is significantly increased, the reason is that
The addition of transverse joint changes the current direction that original " V " font is sewed on, and occurs magnetic dipole at transverse joint, on metallic film
Electric dipole and magnetic dipole collective effect, enhance CD signal.
The oblique incidence that the utility model introduces light is prepared for a kind of external chiral metal nano thin-film optical texture, passes through
Adding a transverse joint in " V " font seam side makes circular dichroism be greatly enhanced；The utility model can use simultaneously
Metal material of copper replaces gold or silver, reduces the preparation cost of chiral material.
It, cannot the above content is specific preferred embodiment further detailed description of the utility model is combined
Assert that the specific implementation of the utility model is only limited to these instructions.For the ordinary skill of the utility model technical field
For personnel, without departing from the concept of the premise utility, a number of simple deductions or replacements can also be made, should all regard
To belong to the protection scope of the utility model.
Claims (4)
1. a kind of chiral metal nano thin-film optical texture, which is characterized in that including metal film, " V " font seam and transverse joint；
" V " the font seam and the transverse joint are provided on the metal film；
The transverse joint is provided with the side of " V " the font seam.
2. chiral metal nano thin-film optical texture according to claim 1, which is characterized in that
" V " the font seam includes left arm and right arm, and the left arm and the right arm are rectangular configuration；The wherein left arm
One end is connected with one end of the right arm, and forms the interior bottom of the outer bottom edge and the second length with the first length in junction
Side, and first length is greater than second length.
3. chiral metal nano thin-film optical texture according to claim 1, which is characterized in that
The metal film is rectangular configuration, and the first side length of the metal film is 400nm-1000nm, the of the metal film
Two side lengths are 400nm-1000nm.
4. chiral metal nano thin-film optical texture according to claim 3, which is characterized in that
The thickness range of the metal film is 20nm-100nm.
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| CN201820970981.6U CN208752320U (en) | 2018-06-22 | 2018-06-22 | A kind of chiral metal nano thin-film optical texture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761619A (en) * | 2018-06-22 | 2018-11-06 | 西安科锐盛创新科技有限公司 | Chiral metal nano thin-film optical texture |
| CN110082385A (en) * | 2019-04-28 | 2019-08-02 | 陕西师范大学 | A kind of micro-nano metal structure and its application for realizing circular dichroism |
| CN110441114A (en) * | 2019-09-05 | 2019-11-12 | 陕西师范大学 | A kind of double stick plane micro-nano metal structure |
-
2018
- 2018-06-22 CN CN201820970981.6U patent/CN208752320U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108761619A (en) * | 2018-06-22 | 2018-11-06 | 西安科锐盛创新科技有限公司 | Chiral metal nano thin-film optical texture |
| CN108761619B (en) * | 2018-06-22 | 2020-11-10 | 深圳市科源光科技有限公司 | Optical structure of chiral metal nano film |
| CN110082385A (en) * | 2019-04-28 | 2019-08-02 | 陕西师范大学 | A kind of micro-nano metal structure and its application for realizing circular dichroism |
| CN110082385B (en) * | 2019-04-28 | 2021-05-28 | 陕西师范大学 | Micro-nano metal structure for realizing circular dichroism and application thereof |
| CN110441114A (en) * | 2019-09-05 | 2019-11-12 | 陕西师范大学 | A kind of double stick plane micro-nano metal structure |
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