CN208399839U - A kind of adjustable optical texture of circular dichroism - Google Patents
A kind of adjustable optical texture of circular dichroism Download PDFInfo
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- CN208399839U CN208399839U CN201821310343.8U CN201821310343U CN208399839U CN 208399839 U CN208399839 U CN 208399839U CN 201821310343 U CN201821310343 U CN 201821310343U CN 208399839 U CN208399839 U CN 208399839U
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Abstract
The utility model belongs to field of optical device technology, and in particular to a kind of adjustable optical texture of circular dichroism.Optical texture is formed by multiple identical periodic units according to rectangular Periodic array combination, periodic unit includes the first rectangular strip, the second rectangular strip, third rectangular strip and the 4th rectangular strip, third rectangular strip one end is connect with the first rectangular strip, the other end is connect with the second rectangular strip, 4th rectangular strip one end is connect with the first rectangular strip, the other end is connect with the second rectangular strip, and the first rectangular strip, the second rectangular strip and third rectangular strip are made of precious metal material, and the 4th rectangular strip is by VO2Material is made.Make VO by adjusting environment temperature2Different phases is obtained, different incident lights are generated with different absorptions, obtains the circular dichroism different for incident light, realizes that preparation and application is simple and convenient, easily operated to the fixed mode adjusting of the embodiment of the present application optical texture circular dichroism.
Description
Technical field
The invention belongs to field of optical device technology, and in particular to a kind of adjustable optical texture of circular dichroism.
Background technique
Circular dichroism (CD, circular dichroism) is research one highly important means of chipal compounds,
As the positive and negative left and right rotation with optical rotatory spectrum of Cotton effect (Cotton Effect) on specific wavelength, chiral enantiomer
Macroscopic view mark there is equivalent effect, and can be determined by the absolute configuration of some chiral enantiomers of rule.
The chiral structure of naturally occurring, circular dichroism is weaker, is unfavorable for widely applying.Since metal and light have
Stronger interaction, artificial metal's nanostructure have very strong circular dichroism, can be used for enhancing nature chiral molecules
Circular dichroism signal.According to published document report, metal Nano structure, which realizes that the method for circular dichroism is most important, to be had
Two kinds, the first, which is light normal incidence, realizes circular dichroism (Yizhuo He, George to metal chiral nanostructure
K.Larsen.Tunable Three-Dimensional Helically Stacked Plasmonic Layers on
Nanosphere Monolayers.Nano Lett.2014,14,1976-1981)；It is for second that be mapped to metal non-for light oblique
Chiral structure realizes circular dichroism (Wuxing Lu, Jian Wu, Qiannan Zhu.Circular dichroism from
Single plasmonic nanostructures with extrinsic chirality.Nanoscale, 2014,6,
14244).Double-deck and multilayered structure circular dichroism signal is stronger, but preparation process is complicated, and to experimenter and experiment instrument
The requirement of device is relatively high, and single layer structure is simple, and preparation is simple, more practical application value, but fixed structure can only generate at present
Fixed circular dichroism signal can not carry out dynamic regulation.
Summary of the invention
Fix to solve the circular dichroism signal of fixed structure existing in the prior art, can not dynamic regulation ask
Topic, the embodiment of the present application provide a kind of adjustable optical texture of circular dichroism, and the adjustable optical texture of circular dichroism is single layer knot
Structure, structure is simple, and preparation is convenient, and each periodic unit includes a trapezium structure, and trapezium structure is made of precious metal material
The first rectangular strip, the second rectangular strip, third rectangular strip and by VO2Manufactured 4th rectangular strip is composed, wherein the 4th square
Shape item is by VO2Material is made, and can make VO by adjusting environment temperature2Different phases is obtained, different incident lights are generated not
Same absorption, obtains the circular dichroism different for incident light, can be realized to the embodiment of the present application optical texture circular dichroism
Fixed mode adjusting.
The technical problem to be solved in the present invention is achieved through the following technical solutions:
A kind of adjustable optical texture of circular dichroism, the optical texture is by multiple identical periodic units according to rectangle week
Phase array combination forms；The two neighboring periodic unit has a gap in X-direction, in y-direction continuously；The period is single
Member includes the first rectangular strip, the second rectangular strip, third rectangular strip and the 4th rectangular strip；First rectangular strip and second square
Shape item is parallel；Third rectangular strip one end is connect with first rectangular strip, and the other end is connect with second rectangular strip；Institute
It states the 4th rectangular strip one end to connect with first rectangular strip, the other end is connect with second rectangular strip；The third rectangle
Article with the 4th rectangular strip mutually from；First rectangular strip, the second rectangular strip and third rectangular strip are made of precious metal material；
4th rectangular strip is by VO2Material is made.
Further, the third rectangular strip and first rectangular strip have fisrt feature angle α；4th rectangle
Item and first rectangular strip have second feature angle β.
Further, the optical texture further includes the basal layer for being connected to bottom.
Further, the basal layer is made of glass material；The precious metal material is gold or silver.
Further, the fisrt feature angle α is not equal to 0 ° and 180 °；The second feature angle β not equal to 0 ° and
180°。
Further, the fisrt feature angle α and second feature angle β are unequal.
Further, the adjusting method of the adjustable optical texture circular dichroism of a kind of circular dichroism, comprising the following steps:
The optical texture is placed in the adjustable closed environment of a temperature, by adjusting 68 DEG C of environment temperature T < or T
68 DEG C of >, the 4th rectangular strip VO2There is different phases in 68 DEG C of T < or 68 DEG C of T >, it is special to generate different transmissions
Property, to obtain different circular dichroism；It can reach the adjusting light by adjusting the optical texture local environment temperature i.e.
Learn the purpose of structure circular dichroism.
When environment temperature is less than 68 DEG C, the optical texture generates three modes, be distributed as absorbing point be respectively as follows: λ=
700nm, CD=7%；λ=800nm, CD=13%；λ=1350nm, CD=-3%；
When environment temperature is greater than 68 DEG C, the optical texture generates three modes, respectively absorb point be respectively as follows: λ=
700nm, CD=18%；λ=800nm, CD=8%；λ=1050nm, CD=4%.
Compared with prior art, beneficial effects of the present invention:
1. the embodiment of the present application optical texture is single layer chirality nanostructure, different circularly polarized lights can be generated not
Same absorption, so that biggish circular dichroism is generated, for characterizing or enhancing the signal of chiral molecules, for chiral biology point
The detection of son or enantiomer sensing etc..The embodiment of the present application optical texture structure is simple, easily prepared, and structure is to interconnect
Single layer reticular structure, can be convenient increase electrode, change the field distribution of body structure surface by applied voltage, to change this
Apply for absorption of the embodiment optical texture for incident light, adjusts the embodiment of the present application optical texture circular dichroism to reach
Purpose.
2. the 4th rectangular strip of the embodiment of the present application optical texture is by VO2Material is made, and does not need when adjusting circular dichroism
Change the geometric parameter of structure itself, it is only necessary to which adjusting environment temperature just can be changed the 4th rectangular strip VO2Phase, change the knot
Absorption of the structure for incident light, to change the circular dichroism of the embodiment of the present application optical texture, so that it may reach and adjust optics knot
The purpose of structure circular dichroism, adjusting method is simple and convenient, and the requirement to experimental facilities and experimenter substantially reduces, and redesigns
With prepare micronano optical structure process very complicated, experimental facilities is at high price, and preparation structure is at high cost again, the application implement
The circular dichroism adjusting of example optical texture, which only need to change environment temperature, can be realized, and adjusting method is simple and fast, can be greatly reduced
The adjustment cost of circular dichroism.
3. the 4th rectangular strip of the embodiment of the present application optical texture uses phase-change material VO2It is made, VO2Phase transition temperature about
It is 68 DEG C, is not much different with room temperature, will not influence the geometry and optics with other building blocks of system where the optical texture
Characteristic, performance are stablized, and damage, long service life are unlikely to deform.
4. VO in the 4th rectangular strip of the embodiment of the present application optical texture2After reaching phase transition temperature, transformation time is very short,
In ns rank, the regulation sensitivity of the embodiment of the present application optical texture circular dichroism can be greatly improved.
5. the 4th rectangular strip VO of the embodiment of the present application optical texture2Phase transition process be reversible, can be repeated several times, utilize
Rate is high, can be widely used in temperature control device, optoelectronic switch etc., using low with preparation cost, save resource and avoids resource unrestrained
Take.
Detailed description of the invention
Fig. 1 is the embodiment of the present application optical texture structural schematic diagram；
Fig. 2 is the embodiment of the present application optical texture circular dichroism figure.
Wherein: 1, the first rectangular strip；2, the second rectangular strip；3, third rectangular strip；4th rectangular strip.
Specific embodiment
The embodiment of the present application provides a kind of adjustable optical texture of circular dichroism, and the embodiment of the present application optical texture is single
Layer structure, structure is simple, and preparation is convenient, and each periodic unit includes a trapezium structure, and trapezium structure is by precious metal material
Manufactured first rectangular strip, the second rectangular strip, third rectangular strip and by VO2Manufactured 4th rectangular strip is composed, wherein the
Four rectangular strips are by VO2Material is made, and can make VO by adjusting environment temperature2Different phases is obtained, different incident lights are produced
Raw different absorption, obtains the circular dichroism different for incident light, can be realized to the embodiment of the present application optical texture circle two
The fixed mode adjusting of color.The circular dichroism signal for solving fixed structure existing in the prior art is fixed, can not dynamic
The problem of regulation.Preparation and application is simple and convenient, easily operated.
Further detailed description is done to the present invention combined with specific embodiments below, but embodiments of the present invention are not limited to
This.
Embodiment 1:
A kind of adjustable optical texture of circular dichroism, by multiple identical periodic units according to rectangular Periodic array combination and
At two neighboring periodic unit has a gap in the direction x, and in y-direction continuously, each periodic unit includes the first rectangular strip
1, the second rectangular strip 2, third rectangular strip 3 and the 4th rectangular strip 4.First rectangular strip 1 is parallel with the second rectangular strip 2, third rectangle
3 one end of item is connect with the first rectangular strip 1, and the other end is connect with the second rectangular strip 2,4 one end of the 4th rectangular strip and the first rectangular strip 1
Connection, the other end connect with the second rectangular strip 2, third rectangular strip 3 and 4 phase of the 4th rectangular strip from.First rectangular strip 1, the second square
Shape item 2 and third rectangular strip 3 are made of precious metal material, and the 4th rectangular strip 4 is by VO2Material is made.Optical texture further includes connecting
The basal layer in bottom is connect, basal layer is made of glass material, and precious metal material is gold or silver.
Specifically:
When incident light irradiates the present embodiment optical texture, the present embodiment optical texture has left and right rounding polarised light
Different absorptivities is to generate circular dichroism.The geometric parameter of structure itself is had no need to change when adjusting circular dichroism, only
It needs to adjust environment temperature just and the VO of the 4th rectangular strip 4 can be changed2Phase, change absorption of the structure for incident light, from
And change the circular dichroism of the embodiment of the present application optical texture, so that it may reach and adjust the embodiment of the present application optical texture circular dichroism
Purpose, adjusting method is simple and convenient, and the requirement to experimental facilities and experimenter substantially reduces, and solves redesign and system
Standby micronano optical structure process very complicated, experimental facilities is at high price, again preparation structure problem at high cost, and the application is real
The circular dichroism adjusting for applying an optical texture, which only need to change environment temperature, can be realized, and adjusting method is simple and convenient, greatly drops
The low adjustment cost of circular dichroism.
The 4th rectangular strip 4 of the present embodiment optical texture is by VO2Material is made, and the 4th rectangular strip 4 is preferably that golden material is made.
Specifically:
The 4th rectangular strip 4 of the present embodiment optical texture uses phase-change material VO2It is made, VO2Phase transition temperature be about 68
DEG C, it is not much different with room temperature, will not influence the geometry and optical characteristics with other building blocks of system where the optical texture,
Performance is stablized, and damage, long service life are unlikely to deform.VO2After reaching phase transition temperature, transformation time is very short, in ns rank,
The regulation sensitivity of the present embodiment optical texture circular dichroism can greatly be improved.And VO2Phase transition process be reversible,
It can be repeated several times, utilization rate is high, can be widely used in temperature control device, optoelectronic switch etc., uses, saving low with preparation cost
Resource avoids the wasting of resources.
Third rectangular strip 3 and the first rectangular strip 1 have fisrt feature angle α, and the 4th rectangular strip 4 and the first rectangular strip 1 have
There is second feature angle β, fisrt feature angle α is not equal to 0 ° and 180 °, and second feature angle β is not equal to 0 ° and 180 °.First
Feature angle α and second feature angle β are not equal to 0 ° and 180 °, and the first rectangular strip 1 and the second rectangular strip 2 is avoided to be overlapped, and the
One feature angle α and second feature angle β are unequal, achirality structure are formed, so as to generate biggish circular dichroism.
Specifically:
The present embodiment optical texture is single layer chirality nanostructure, and different suctions can be generated for different circularly polarized lights
Receive, obtain biggish circular dichroism, for characterizing or enhancing the signal of chiral molecules, for chiral biomolecule detection or
Person's enantiomer sensing etc..The present embodiment optical texture structure is simple, easily prepared, and structure is the netted knot of single layer interconnected
Structure can be convenient connection electrode, change the field distribution of body structure surface by applied voltage, to change the embodiment of the present application light
Absorption of the structure for incident light is learned, to achieve the purpose that adjust the embodiment of the present application optical texture circular dichroism.
Embodiment 2:
For the adjustable optical texture of circular dichroism disclosed in embodiment 1 is further described, present embodiment discloses the knots
The circular dichroism figure of structure at different temperatures.Specific setting ginseng is set according to 1 optical texture of embodiment with pattern generator
Number is as follows:
First rectangular strip, 1 length l12 length l of=the second rectangular strip2=700nm；3 width w of third rectangular strip3=50nm；The
Four rectangular strips, 4 width w4=100nm；First rectangular strip, 1 width w1=100nm；Second rectangular strip, 2 width w2=50nm；Period is single
Elemental size is Px×Py=600nm × 700nm, optical texture is with a thickness of 350nm；Fisrt feature angle α=second feature angle β
=60 °.Using circularly polarized light vertical irradiation the present embodiment optical texture, it is measured at different temperatures for different circularly polarized lights
Absorption, obtain the absorption circular dichroism figure of the present embodiment optical texture as shown in Figure 2.
We can be clearly seen that from Fig. 2, and when environment is room temperature, the present embodiment is preferably T=20 DEG C of temperature, can be with
It generates three circular dichroism and absorbs point, be respectively as follows: λ=700nm, CD=7%；λ=800nm, CD=13%；λ=1350nm, CD
=-3%.When hot environment, the present embodiment is preferably T=68 DEG C of temperature, and three absorption points are generated in circular dichroism figure:
λ=700nm, CD=18%；λ=800nm, CD=8%；λ=1050nm, CD=4%.
Circular dichroism signal when the present embodiment optical texture high-temperature-phase is compared with room temperature is enhanced, and λ when room temperature=
The mode of 1350nm has occurred blue shift, and when high temperature has appeared in λ=1050nm, and the symbol of CD is inverted, when by room temperature
- 3% when becoming high temperature 4%.The embodiment of the present application can be by the adjusting of temperature to the position of the CD mode of optical texture
It is adjusted.
Embodiment 3:
Based on optical texture disclosed in embodiment 1, present embodiment discloses a kind of adjusting sides of optical texture circular dichroism
Method, comprising the following steps:
Optical texture is placed in the adjustable closed environment of a temperature, by adjusting 68 DEG C of environment temperature T < or T > 68
DEG C, the 4th rectangular strip 4VO2There are two kinds of different phases in 68 DEG C of T < or 68 DEG C of T >, generate different transmissison characteristics, from
And different circular dichroism is obtained, it can reach adjusting optical texture circular dichroism by adjusting optical texture local environment temperature i.e.
Purpose.
When environment temperature is less than 68 DEG C, the optical texture generates three modes, be distributed as absorbing point be respectively as follows: λ=
700nm, CD=7%；λ=800nm, CD=13%；λ=1350nm, CD=-3%；
When environment temperature is greater than 68 DEG C, the optical texture generates three modes, respectively absorb point be respectively as follows: λ=
700nm, CD=18%；λ=800nm, CD=8%；λ=1050nm, CD=4%.
Specifically:
Environment temperature T can blowing air thermoregulator, such as air-conditioning or common heater or refrigerator heated
Or it is cooling.
Absorption of the adjustable the present embodiment of the present embodiment optical texture for circularly polarized light, by changing environment temperature T,
Make VO2Lattice structure the transformation of cubic rutile structure (68 DEG C of T >) and monocline (68 DEG C of T <), two kinds of temperature occur
Under VO2Phase is different, has different absorption characteristics, to realize under the premise of not changing original structure by adjusting light
Adjusting of the local environment temperature T realization to the embodiment of the present application optical texture absorption characteristic is learned, changes the application reality to reach
A purpose for optical texture circular dichroism is applied, solves the problems, such as that current fixed structure circular dichroism can not be adjusted, the application is real
An optical texture novel design is applied, structure simply has certain design guidance effect, and the research of more other optical devices mentions
A kind of new research direction and thinking are supplied.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to of the invention
Protection scope.
Claims (6)
1. a kind of adjustable optical texture of circular dichroism, it is characterised in that: the optical texture is by multiple identical periodic units
It is formed according to rectangular Periodic array combination；The two neighboring periodic unit has a gap in X-direction, in y-direction continuously；
The periodic unit includes the first rectangular strip, the second rectangular strip, third rectangular strip and the 4th rectangular strip；
First rectangular strip is parallel with second rectangular strip；Third rectangular strip one end and first rectangular strip connect
It connects, the other end is connect with second rectangular strip；Described 4th rectangular strip one end is connect with first rectangular strip, the other end with
The second rectangular strip connection；The third rectangular strip and the 4th rectangular strip mutually from；
First rectangular strip, the second rectangular strip and third rectangular strip are made of precious metal material；4th rectangular strip is by VO2
Material is made.
2. optical texture according to claim 1, it is characterised in that: the third rectangular strip and first rectangular strip have
There is fisrt feature angle α；4th rectangular strip and first rectangular strip have second feature angle β.
3. optical texture according to claim 1, it is characterised in that: the optical texture further includes the base for being connected to bottom
Bottom.
4. optical texture according to claim 3, it is characterised in that: the basal layer is made of glass material；It is described expensive
Metal material is gold or silver.
5. optical texture according to claim 2, it is characterised in that: the fisrt feature angle α is not equal to 0 ° and 180 °；
The second feature angle β is not equal to 0 ° and 180 °.
6. optical texture according to claim 2, it is characterised in that: the fisrt feature angle α and second feature angle β
It is unequal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109946771A (en) * | 2019-05-05 | 2019-06-28 | 韩山师范学院 | A kind of triangle chiral structure and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109946771A (en) * | 2019-05-05 | 2019-06-28 | 韩山师范学院 | A kind of triangle chiral structure and preparation method thereof |
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