CN106199798A - Unordered minor structure grating and the method by a random function design grating - Google Patents
Unordered minor structure grating and the method by a random function design grating Download PDFInfo
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- CN106199798A CN106199798A CN201610541973.5A CN201610541973A CN106199798A CN 106199798 A CN106199798 A CN 106199798A CN 201610541973 A CN201610541973 A CN 201610541973A CN 106199798 A CN106199798 A CN 106199798A
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Abstract
The invention discloses unordered minor structure grating, multiple one-dimensional disorder minor structure long-period gratings, one-dimensional disorder minor structure long-period gratings includes the periodic unit along X-axis periodic arrangement, periodic unit includes several the different minor structures along X-axis arrangement, in same one-dimensional disorder minor structure long-period gratings, the structure of each periodic unit is identical, each one-dimensional disorder minor structure long-period gratings obtains two one-dimensional disorder minor structure long-period gratings along Y-axis arrangement, and the minor structure kind of the periodic unit in each one-dimensional disorder minor structure long-period gratings is identical.Also disclose the method by a random function design grating, the present invention utilizes random function ordered structure and disordered structure to be merged, while inheriting ordered structure advantage, obtaining disordered structure in the higher manipulation ability of the aspect such as bandwidth and angle, the light effect that caves in of the big bandwidth range at 300 ~ 1000nm improves nearly 70% than other disordered structures.
Description
Technical field
The present invention relates to Grating Design technical field, be specifically related to unordered minor structure grating, further relate to by the most random
The method of function design grating.Be applicable to spectroscopy, integrated optoelectronic device, communicate, sense, liquid crystal panel, solaode and
The aspects such as atomic energy.
Background technology
Surface optical structure such as grating, photonic crystal and other orderly and unordered optical texture etc. can regulate incidence
The performance of the aspects such as light and the reflection bandwidth of light, polarization, angle and resonance, thus realize optical coupling, the shaping of light pulse, light filter
The functions such as ripple, grating reflector, light anti-reflective emitter, light absorber and optical resonator, spectroscopy, integrated optoelectronic device, communication,
The aspect tools such as sensing, liquid crystal panel, solaode and atomic energy are widely used.
Surface optical structure has three types from the point of view of the external feature presented: the first is ordered into structural periodicity arrangement
Form, such as grating and photonic crystal etc.；The second is the most unordered surface texture；The third is to combine overall drawn game portion in order
Unordered mixed structure, the long-period gratings of the most unordered minor structure.Ordered structure design is easy, processing technology also relative maturity,
But there is the problem such as angular spectrum and limited bandwidth.Disordered structure can improve the performance in angular spectrum and bandwidth, but unordered
Structure is typically in precipitation of material growth and the manufacture process such as pattern etching to be randomly derived more greatly, for tool because of fabrication error
How body designs disordered structure, and designing which type of disordered structure also needs to study further, it is difficult to designed by the method for system,
Cause its application limited.
So we have proposed one to utilize random function, orderly long-periodic structure introduces the unordered minor structure of disorder
It is combined into the method for designing of blending surface structure.While the method can inherit ordered structure advantage, it is thus achieved that disordered structure is at band
The manipulation ability that the aspects such as width and angle are higher.
Summary of the invention
It is an object of the invention to the problems referred to above existed for prior art, it is provided that unordered minor structure grating, additionally provide
By the method for random function design grating, the present invention utilizes the method for random function and coding to solve how system
Design unordered minor structure long-period gratings.
The above-mentioned purpose of the present invention is achieved through the following technical solutions:
Unordered minor structure grating, including multiple one-dimensional disorder minor structure long-period gratings, one-dimensional disorder minor structure long-period gratings
Including the periodic unit along X-axis periodic arrangement, periodic unit includes several the different minor structures along X-axis arrangement, respectively
The minor structure kind of the periodic unit in individual one-dimensional disorder minor structure long-period gratings is identical, same one-dimensional disorder minor structure length week
In phase grating, the structure of each periodic unit is identical, and each one-dimensional disorder minor structure long-period gratings arranges acquisition two along Y-axis
One-dimensional disorder minor structure long-period gratings, two one-dimensional disorder minor structure long-period gratings are arranged in grating substrate.
One-dimensional disorder minor structure long-period gratings as above is N kind, and N is more than or equal to 1, N kind one-dimensional disorder minor structure
Long-period gratings is arranged to make up Y direction screen periods unit along Y-axis, and Y direction screen periods unit obtains along Y-axis periodic arrangement
Obtain two one-dimensional disorder minor structure long-period gratings.
Grating substrate as above is non-crystalline silicon substrate.
By the method for a random function design grating, comprise the steps:
Step 1, design minor structure set, the minor structure in minor structure set is different, chooses M son in minor structure set
Structure, M is more than 1, the numbering of M minor structure is respectively labeled as 0～M-1；
Step 2, design one-dimensional disorder minor structure long-period gratings, i.e. along the one-dimensional disorder minor structure long-period gratings of X-direction,
Particularly as follows:
Step 2.1, utilize random function to carry out randomly ordered by the numbering corresponding to M minor structure, obtain randomly ordered son
Structure number order, carries out arrangement by M minor structure according to minor structure number order and obtains periodic unit；
Step 2.2, periodic unit step 2.1 obtained carry out periodic arrangement along one-dimensional direction, i.e. X-direction, obtain one-dimensional
Unordered minor structure long-period gratings；
Step 3, by one-dimensional disorder minor structure long-period gratings along Y-axis carry out arrangement obtain two one-dimensional disorder minor structure periodic optical gratings.
The one-dimensional disorder minor structure long-period gratings that procedure described above 2 obtains is N kind, and N is more than or equal to 1, the one-dimensional nothing of N kind
Sequence minor structure long-period gratings is arranged to make up Y direction screen periods unit along Y-axis, and Y direction screen periods unit is along Y-axis week
Phase arrangement obtains two one-dimensional disorder minor structure long-period gratings.
The present invention has the advantages that relative to prior art
1, the present invention utilizes random function ordered structure and disordered structure to be merged, and is the unordered son of design of a kind of system
The method of structure long-period gratings.
2, while unordered minor structure long-period gratings can inherit ordered structure advantage, it is thus achieved that disordered structure in bandwidth and
The manipulation ability that the aspects such as angle are higher, the big bandwidth range of 300 ~ 1000nm cave in light effect than background technology in relate to
Other disordered structures existing improve nearly 70%.
Accompanying drawing explanation
Fig. 1 is the 5 minor structure schematic diagrams chosen in embodiment 2, and wherein T is the Cycle Length of minor structure.
Fig. 2 is the structural representation of the one-dimensional disorder minor structure long-period gratings in embodiment 2.
Fig. 3 is the 5 minor structure schematic diagrams chosen in embodiment 3.
Fig. 4 is the randomly ordered son of the periodic unit in 3 kinds of one-dimensional disorder minor structure long-period gratings in embodiment 3
Structure number order, the cycle during wherein (a) is the first one-dimensional disorder minor structure long-period gratings of unordered minor structure 1(is single
Unit)；B () is the periodic unit in unordered minor structure 2(the second one-dimensional disorder minor structure long-period gratings)；C () is unordered son
Periodic unit in the third one-dimensional disorder minor structure long-period gratings of structure 3().
Fig. 5 is the two one-dimensional disorder minor structure long-period gratings obtained in embodiment 3.
In the drawings, numeral is numbering, does not represent the digital labelling of parts.Another 5T refers to 5 sub-structure lengths.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme is further described:
Embodiment 1:
Unordered minor structure grating, including multiple one-dimensional disorder minor structure long-period gratings, one-dimensional disorder minor structure long-period gratings
Including the periodic unit along X-axis periodic arrangement, periodic unit includes several the different minor structures along X-axis arrangement, respectively
The minor structure kind of the periodic unit in individual one-dimensional disorder minor structure long-period gratings is identical, same one-dimensional disorder minor structure length week
In phase grating, the structure of each periodic unit is identical, and each one-dimensional disorder minor structure long-period gratings arranges acquisition two along Y-axis
One-dimensional disorder minor structure long-period gratings, two one-dimensional disorder minor structure long-period gratings are arranged in grating substrate.
Preferably, described one-dimensional disorder minor structure long-period gratings is N kind, and N is more than or equal to 1, and N kind one-dimensional disorder is tied
Structure long-period gratings is arranged to make up Y direction screen periods unit along Y-axis, and Y direction screen periods unit is along Y-axis periodic arrangement
Obtain two one-dimensional disorder minor structure long-period gratings.
Preferably, described grating substrate is non-crystalline silicon substrate.
By the method for a random function design grating, comprise the steps:
Step 1, design minor structure set, the minor structure in minor structure set is different, chooses M son in minor structure set
Structure, M is more than 1, the numbering of M minor structure is respectively labeled as 0～M-1；
Step 2, design one-dimensional disorder minor structure long-period gratings, i.e. along the one-dimensional disorder minor structure long-period gratings of X-direction,
Particularly as follows:
Step 2.1, utilize random function to carry out randomly ordered by the numbering corresponding to M minor structure, obtain randomly ordered son
Structure number order, carries out arrangement by M minor structure according to minor structure number order and obtains periodic unit；
Step 2.2, periodic unit step 2.1 obtained carry out periodic arrangement along one-dimensional direction, i.e. X-direction, obtain one-dimensional
Unordered minor structure long-period gratings；
Step 3, by one-dimensional disorder minor structure long-period gratings along Y-axis carry out arrangement obtain two one-dimensional disorder minor structure periodic optical gratings.
The one-dimensional disorder minor structure long-period gratings that procedure described above 2 obtains is N kind, and N is more than or equal to 1, the one-dimensional nothing of N kind
Sequence minor structure long-period gratings is arranged to make up Y direction screen periods unit along Y-axis, and Y direction screen periods unit is along Y-axis week
Phase arrangement obtains two one-dimensional disorder minor structure long-period gratings.
Embodiment 2:
As shown in Fig. 1～2, in the unordered minor structure grating of the present embodiment, one-dimensional disorder minor structure long-period gratings is a kind of, one
The minor structure of the periodic unit in one-dimensional disorder minor structure long-period gratings be followed successively by triangular substructure, the 3rd U-lag minor structure,
First U-lag minor structure, square minor structure, the 3rd U-lag minor structure.The U-type groove mouth of the first U-lag minor structure upward, the 2nd U
The U-lag mouth down of shape groove structure, the 3rd U-lag minor structure notch is towards the right side.One one-dimensional disorder minor structure long-period gratings
I.e. constituting Y direction screen periods unit, Y direction screen periods unit obtains two one-dimensional disorder minor structures along Y-axis periodic arrangement
Long-period gratings.
Other are same as in Example 1.
In the method by a random function design grating of the present embodiment, the son knot chosen from minor structure set
The shape of structure chooses shape as shown in Figure 1, and numbering is from 0 to 4, and corresponding minor structure shape is followed successively by square minor structure, triangle
Shape minor structure, the first U-lag minor structure, the second U-lag minor structure, the 3rd U-lag minor structure, the first U-lag minor structure U-shaped
Upward, the U-lag mouth down of the second U-lag minor structure, the 3rd U-lag minor structure notch is towards the right side for notch.
In the method by a random function design grating of the present embodiment, the son after step 2 is randomly ordered
Structure number order is 1,3,2,0,4, and be corresponding in turn to is triangular substructure, the second U-lag minor structure, the first U-lag
Structure, square minor structure, the 3rd U-lag minor structure.
In the method by a random function design grating of the present embodiment, an one-dimensional disorder knot in step 3
Structure long-period gratings i.e. constitutes Y direction screen periods unit, and Y direction screen periods unit obtains two along Y-axis periodic arrangement
One-dimensional disorder minor structure long-period gratings.
Other are same as in Example 1.
Embodiment 3:
As seen in figures 3-5, in the unordered minor structure grating of the present embodiment, one-dimensional disorder minor structure long-period gratings is three kinds:
The minor structure of the periodic unit in the first one-dimensional disorder minor structure long-period gratings is followed successively by triangular substructure, H-shaped
Minor structure, the first U-lag minor structure, square minor structure, the second U-lag minor structure, the notch of the first U-lag minor structure upward,
The notch of the second U-lag minor structure is down.
The minor structure of the periodic unit in the second one-dimensional disorder minor structure long-period gratings is followed successively by the first U-lag knot
Structure, H-shaped minor structure, square minor structure, triangular substructure, the second U-lag minor structure, the notch court of the first U-lag minor structure
Above, the notch of the second U-lag minor structure is down.
The minor structure of the periodic unit in the third one-dimensional disorder minor structure long-period gratings is followed successively by the second U-lag knot
Structure, triangular substructure, square minor structure, the first U-lag minor structure, H-shaped minor structure, the notch court of the first U-lag minor structure
Above, the notch of the second U-lag minor structure is down.
Three kinds of one-dimensional disorder minor structure long-period gratings are arranged to make up Y direction screen periods unit, Y direction along Y-axis
Screen periods unit obtains two one-dimensional disorder minor structure long-period gratings along Y-axis periodic arrangement.
Other are same as in Example 1.
In the method by a random function design grating of the present embodiment:
The shape of the minor structure chosen from minor structure set in step 1 is as it is shown on figure 3, numbering is from 0 to 4, and minor structure is followed successively by
Square minor structure, triangular substructure, the first U-lag minor structure, the second U-lag minor structure, H-shaped minor structure, the first U-lag
Upward, the notch of the second U-lag minor structure is down for the notch of structure.
The one-dimensional disorder minor structure long-period gratings that step 2 obtains is 3 kinds:
Periodic unit in the first one-dimensional disorder minor structure long-period gratings randomly ordered after minor structure number order divide
Not Wei (1,4,2,0,3), corresponding minor structure order is triangular substructure, H-shaped minor structure, the first U-lag minor structure, square
Minor structure, the second U-lag minor structure；
Periodic unit in the second one-dimensional disorder minor structure long-period gratings randomly ordered after minor structure number order divide
Not Wei (2,4,0,1,3), corresponding minor structure order is the first U-lag minor structure, H-shaped minor structure, square minor structure, triangle
Minor structure, the second U-lag minor structure；
Periodic unit in the third one-dimensional disorder minor structure long-period gratings randomly ordered after minor structure number order divide
Not Wei (3,1,0,2,4), corresponding minor structure order be the second U-lag minor structure, triangular substructure, square minor structure, the
One U-lag minor structure, H-shaped minor structure.
As it is shown in figure 5,3 kinds of one-dimensional disorder minor structure long-period gratings constitute Y direction screen periods along Y-axis distribution successively
Unit, Y direction screen periods unit obtains two one-dimensional disorder minor structure long-period gratings along Y-axis periodic arrangement.Other with implement
Example 1 is identical.
In the present embodiment, it is thus achieved that unordered minor structure grating in the higher manipulation ability of the aspect such as bandwidth and angle,
The big bandwidth range of the 300 ~ 1000nm light effect that caves in improves nearly 70% than the existing disordered structure related in background technology.
It is an advantage of the current invention that in sum: utilize coding and random function, introduce disorderly in orderly long-periodic structure
Random unordered minor structure is combined into blending surface structure, while the method can inherit ordered structure advantage, it is thus achieved that disordered structure
In the manipulation ability that the aspect such as bandwidth and angle is higher, define the design of a kind of novel more system containing unordered minor structure
The method of long-period gratings.
Specific embodiment described herein is only to present invention spirit explanation for example.Technology neck belonging to the present invention
Described specific embodiment can be made various amendment or supplements or use similar mode to replace by the technical staff in territory
Generation, but without departing from the spirit of the present invention or surmount scope defined in appended claims.
Claims (5)
- The most unordered minor structure grating, it is characterised in that include multiple one-dimensional disorder minor structure long-period gratings, one-dimensional disorder is tied Structure long-period gratings includes the periodic unit along X-axis periodic arrangement, and it is different some that periodic unit includes along X-axis arrangement Individual minor structure, the minor structure kind of the periodic unit in each one-dimensional disorder minor structure long-period gratings is identical, same one-dimensional nothing In sequence minor structure long-period gratings, the structure of each periodic unit is identical, and each one-dimensional disorder minor structure long-period gratings is along Y Axle arrangement obtains two one-dimensional disorder minor structure long-period gratings, and two one-dimensional disorder minor structure long-period gratings are arranged in grating substrate.
- Unordered minor structure grating the most according to claim 1, it is characterised in that described one-dimensional disorder minor structure long period Grating is N kind, and N is more than or equal to 1, and N kind one-dimensional disorder minor structure long-period gratings is arranged to make up Y direction screen periods along Y-axis Unit, Y direction screen periods unit obtains two one-dimensional disorder minor structure long-period gratings along Y-axis periodic arrangement.
- Any unordered minor structure grating the most according to claims 1 to 2, it is characterised in that described grating substrate is non- Crystal silicon substrate.
- 4. by the method for a random function design grating, it is characterised in that comprise the steps:Step 1, design minor structure set, the minor structure in minor structure set is different, chooses M son in minor structure set Structure, M is more than 1, the numbering of M minor structure is respectively labeled as 0～M-1；Step 2, design one-dimensional disorder minor structure long-period gratings, i.e. along the one-dimensional disorder minor structure long-period gratings of X-direction, Particularly as follows:Step 2.1, utilize random function to carry out randomly ordered by the numbering corresponding to M minor structure, obtain randomly ordered son Structure number order, carries out arrangement by M minor structure according to minor structure number order and obtains periodic unit；Step 2.2, periodic unit step 2.1 obtained carry out periodic arrangement along one-dimensional direction, i.e. X-direction, obtain one-dimensional Unordered minor structure long-period gratings；Step 3, by one-dimensional disorder minor structure long-period gratings along Y-axis carry out arrangement obtain two one-dimensional disorder minor structure periodic optical gratings.
- Method by a random function design grating the most according to claim 4, it is characterised in that described step 2 The one-dimensional disorder minor structure long-period gratings obtained is N kind, and N is more than or equal to 1, and N kind one-dimensional disorder minor structure long-period gratings is along Y Axle is arranged to make up Y direction screen periods unit, and Y direction screen periods unit obtains two one-dimensional disorder along Y-axis periodic arrangement Structure long-period gratings.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6665472B2 (en) * | 2000-12-01 | 2003-12-16 | Sumitomo Electric Industries, Ltd. | Optical filter having cascaded long-period gratings |
| JP2013205640A (en) * | 2012-03-28 | 2013-10-07 | Toppan Printing Co Ltd | Image display body and information medium |
| CN203858381U (en) * | 2014-01-26 | 2014-10-01 | 京东方科技集团股份有限公司 | Grating and display device |
| CN104749672A (en) * | 2015-03-26 | 2015-07-01 | 上海师范大学 | Photon structure having large angle chromatic dispersion light split ability |
| CN205861930U (en) * | 2016-07-12 | 2017-01-04 | 中南民族大学 | Unordered minor structure grating |
-
2016
- 2016-07-12 CN CN201610541973.5A patent/CN106199798B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6665472B2 (en) * | 2000-12-01 | 2003-12-16 | Sumitomo Electric Industries, Ltd. | Optical filter having cascaded long-period gratings |
| JP2013205640A (en) * | 2012-03-28 | 2013-10-07 | Toppan Printing Co Ltd | Image display body and information medium |
| CN203858381U (en) * | 2014-01-26 | 2014-10-01 | 京东方科技集团股份有限公司 | Grating and display device |
| CN104749672A (en) * | 2015-03-26 | 2015-07-01 | 上海师范大学 | Photon structure having large angle chromatic dispersion light split ability |
| CN205861930U (en) * | 2016-07-12 | 2017-01-04 | 中南民族大学 | Unordered minor structure grating |
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