CN204758857U - Wide bandwidth guided mode resonance filter - Google Patents
Wide bandwidth guided mode resonance filter Download PDFInfo
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- CN204758857U CN204758857U CN201520445249.3U CN201520445249U CN204758857U CN 204758857 U CN204758857 U CN 204758857U CN 201520445249 U CN201520445249 U CN 201520445249U CN 204758857 U CN204758857 U CN 204758857U
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- mode resonance
- grating
- wide bandwidth
- metal wire
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- Diffracting Gratings Or Hologram Optical Elements (AREA)
Abstract
The utility model relates to a wide bandwidth guided mode resonance filter, the guided mode resonance wave filter of compriseing overburden, grating layer and stratum basale in proper order including from the top down adds the metal wire grating of upper story Z style of calligraphy on grating layer structure surface, and grating layer thickness, grating cycle, duty cycle are unchangeable, and stratum basale thickness is unchangeable, the thickness of cover attenuation, and whole guided mode resonance wave filter size is unchangeable, formation wide bandwidth guided mode resonance filter. The utility model discloses the structure is fairly simple, and the manufacture craft is also comparatively simple, need not be through steps such as sculptures to can widen its work bandwidth through adding upper story line raster structure simply, it is simple to have the flow, the nimble characteristics of structure.
Description
Technical field
The utility model relates to a kind of guide mode resonance device, particularly a kind of wide bandwidth guide mode resonance light filter.
Background technology
Guide mode resonance wave filter is simple with structure, and diffraction efficiency advantages of higher is paid close attention in a large number, at photoswitch, and biology sensor, antifalsification label, notch structure used for solar batteries, and the aspect such as polarizer has a wide range of applications.Guide mode resonance effect is the unusual optical phenomena of one that Wood in 1902 finds, refers to be coupled between the tunnelling ray that diffracted wave and optical grating construction are supported and the jumping phenomenon of diffraction spectra that causes.And when structural parameters are (as screen periods, grating thickness, waveguide layer thickness etc.) and external condition (as incident angle, incident wavelength, ambient refractive index etc.) when changing, guide mode resonance wave filter has the characteristic of unexpected its optical property of Rapid Variable Design, shows as the phenomenon such as the movement of service band and the change of bandwidth.How when service band does not move, can expand bandwidth, making guide mode resonance wave filter operation strategies wider easier, is the direction of research now.
Summary of the invention
The utility model is by after change of external conditions for present guide mode resonance wave filter, service band can move and the problem of change of bandwidth thereupon, propose a kind of wide bandwidth guide mode resonance light filter, the optical grating construction of guide mode resonance wave filter adds last layer bullion line grating, reaches the object widening wave filter bandwidth of operation.
The technical solution of the utility model is: a kind of wide bandwidth guide mode resonance light filter, comprises overlayer, grating layer, metal wire grating and basalis from top to bottom successively, and metal wire grating is the metal wire grating of Z-shaped, applies on each periodic optical grating of grating layer.
Described metal wire grating material is Ag.
Described wide bandwidth guide mode resonance light filter grating layer refractive index n
1=2.4, thickness h
1=235nm, screen periods is 408nm, and dutycycle is 0.39; Substrate refractive index n
s=1.5; Tectal thickness is h
2 '=25nm, metal wire grating thickness h
4=70nm, the contact length d=138.72nm of metal wire grating and substrate.
The beneficial effects of the utility model are: the utility model wide bandwidth guide mode resonance light filter, relatively simple for structure, manufacture craft is also comparatively simple, do not need by steps such as etchings, and can simply by adding last layer line grating structure to widen its bandwidth of operation, there is flow process simple, the feature of flexible structure.
Accompanying drawing explanation
Fig. 1 is guide mode resonance filter construction schematic diagram;
Fig. 2 is the utility model wide bandwidth guide mode resonance structure of the light filter schematic diagram;
Fig. 3 is the spectrogram of guide mode resonance filter construction;
Fig. 4 is the spectrogram of the utility model wide bandwidth guide mode resonance structure of the light filter.
Embodiment
Guide mode resonance filter construction schematic diagram as shown in Figure 1, the structure of wave filter is followed successively by overlayer 2, grating layer 1 and basalis 3 from top to bottom, designed guide mode resonance wave filter overlayer 2 refractive index n
2=1.49, thickness h
2=95nm, grating layer 1 refractive index n
1=2.4, thickness h
1=235nm, screen periods is 408nm, and dutycycle is 0.39, substrate refractive index n
s=1.5.
The utility model wide bandwidth guide mode resonance structure of the light filter schematic diagram as shown in Figure 2, the metal wire grating 4 of last layer " Z " font is added on each periodic optical grating surface of grating layer 1 structure of guide mode resonance wave filter, change the tunnelling ray that optical grating construction is supported, realize widening of bandwidth of operation.Metal wire grating 4 material is Ag, thickness h
4=70nm, the thickness respective change of overlayer 2 is h
2 '=25nm, metal wire grating thickness adds cover thickness and former guide mode resonance wave filter cover thickness h
2identical, the thickness h of grating layer 1
1 '=h
1=235nm, the contact length d=138.72nm of metal wire grating 4 and substrate 3.
Calculate above-mentioned designed guide mode resonance wave filter by software and add the spectrum of the later the utility model structure of metal wire grating in 400 ~ 900nm scope, result respectively as shown in Figure 3 and Figure 4.It is 76.5nm changing the bandwidth of operation in wavelength coverage that reflectance spectrum shown in Fig. 3 indicates the guide mode resonance filter construction that above-mentioned parameter defines, and can know from the result of Fig. 4, after adding Ag metal wire grating, its bandwidth of operation is widened as 95nm, ensures that the position of operation wavelength is roughly constant simultaneously.
In present embodiment, the working range of designed guide mode resonance wave filter between 600 ~ 700nm, by adding that on optical grating construction the structure of " Z " font Ag metal wire grating achieves widening of about 25% bandwidth of operation.
Claims (3)
1. a wide bandwidth guide mode resonance light filter, is characterized in that, comprises overlayer, grating layer, metal wire grating and basalis from top to bottom successively, and metal wire grating is the metal wire grating of Z-shaped, applies on each periodic optical grating of grating layer.
2. wide bandwidth guide mode resonance light filter according to claim 1, it is characterized in that, described metal wire grating material is Ag.
3. wide bandwidth guide mode resonance light filter according to claim 1 or 2, is characterized in that, described wide bandwidth guide mode resonance light filter grating layer refractive index n
1=2.4, thickness h
1=235nm, screen periods is 408nm, and dutycycle is 0.39; Substrate refractive index n
s=1.5; Tectal thickness is h
2 '=25nm, metal wire grating thickness h
4=70nm, the contact length d=138.72nm of metal wire grating and substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520445249.3U CN204758857U (en) | 2015-06-26 | 2015-06-26 | Wide bandwidth guided mode resonance filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520445249.3U CN204758857U (en) | 2015-06-26 | 2015-06-26 | Wide bandwidth guided mode resonance filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204758857U true CN204758857U (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520445249.3U Expired - Fee Related CN204758857U (en) | 2015-06-26 | 2015-06-26 | Wide bandwidth guided mode resonance filter |
Country Status (1)
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| CN (1) | CN204758857U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950367A (en) * | 2015-06-26 | 2015-09-30 | 上海理工大学 | Large-bandwidth guided-mode resonance light filter |
| CN106772741A (en) * | 2016-12-05 | 2017-05-31 | 江南大学 | A kind of method that guide mode resonance filtering is realized using single graded material grating |
| CN107037517A (en) * | 2017-06-19 | 2017-08-11 | 中国计量大学 | A kind of double-level-metal grating guide mode resonance bandpass filter |
-
2015
- 2015-06-26 CN CN201520445249.3U patent/CN204758857U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104950367A (en) * | 2015-06-26 | 2015-09-30 | 上海理工大学 | Large-bandwidth guided-mode resonance light filter |
| CN106772741A (en) * | 2016-12-05 | 2017-05-31 | 江南大学 | A kind of method that guide mode resonance filtering is realized using single graded material grating |
| CN106772741B (en) * | 2016-12-05 | 2019-07-23 | 江南大学 | A method of guide mode resonance filtering is realized using single graded material grating |
| CN107037517A (en) * | 2017-06-19 | 2017-08-11 | 中国计量大学 | A kind of double-level-metal grating guide mode resonance bandpass filter |
| CN107037517B (en) * | 2017-06-19 | 2019-04-19 | 中国计量大学 | A kind of double-level-metal grating guide mode resonance bandpass filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20170626 |