CN107884874A - A kind of plasmon resonance wavelength division multiplexer - Google Patents
A kind of plasmon resonance wavelength division multiplexer Download PDFInfo
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- CN107884874A CN107884874A CN201711174343.XA CN201711174343A CN107884874A CN 107884874 A CN107884874 A CN 107884874A CN 201711174343 A CN201711174343 A CN 201711174343A CN 107884874 A CN107884874 A CN 107884874A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/12007—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind forming wavelength selective elements, e.g. multiplexer, demultiplexer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/1226—Basic optical elements, e.g. light-guiding paths involving surface plasmon interaction
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Abstract
The present invention discloses a kind of plasmon resonance wavelength division multiplexer, by metallic film, and 1 incident waveguide, the outgoing waveguide of more than 2 and the composition of the resonator of more than 2 being opened in Openworks shape on metallic film.It is identical to be emitted the quantity of waveguide resonant cavity, 1 corresponding 1 resonator of outgoing waveguide.By setting resonator in the both sides of incident waveguide and/or rear end, and outgoing waveguide is set to form multiplexer in the opposite side of resonator, and by adding a metal film block in each intra resonant cavity, so that a F P chamber can be formed in resonator so that surface phasmon SPP realizes resonance coupling with resonator；So acted on using the resonance coupling of surface phasmon SPP and resonator, the separation of phasmon multiple signals and the regulation of each channel wavelength can be realized by adjusting the size of metallic film in resonator；Spacing can be coupled by changing simultaneously, embody specific coupling effect.
Description
Technical field
The present invention relates to micro-nano photon technology field, and in particular to a kind of plasmon resonance wavelength division multiplexer.
Background technology
Devices of the SPP in highly integrated optical circuit has broad application prospects because they overcome it is traditional
Diffraction limit, and can be in sub-wavelength dimensions upper-pilot light.In the various plasma SPP structures having pointed out, metal-Jie
Matter-metal (MIM) waveguiding structure with support surface plasmon (SPPs) pattern because can be transmitted and be strapped in pattern
In dielectric layer, and there is stronger local ability to light, it is simple and be easy to the advantages of highly integrated, nano-integrated optics with
There is great application potential in terms of device.
With the continuous development of scientific technology, the wavelength division multiplexer applied to wavelength selection passes in optical computing and electric signal
Critically important effect is played in broadcasting, such as based on plasma band logical and bandstop filter, the former allows the light with certain wavelength
By waveguide, and the latter forbids the transmission of some wavelength.Both wave filters have critically important status in nanocomposite optical device.
Scientific research personnel conducts extensive research to this one after another, such as the nano plasma waveguide filter of dentation, based on long-range
The wave filter of plasma, and curved waveguide bandpass filter.It is however, also less for existing plasma wavelength division multiplexer
Concern.
The content of the invention
The present invention provides a kind of plasmon resonance wavelength division multiplexer, and it can realize different qualities and function.
To solve the above problems, the present invention is achieved by the following technical solutions：
A kind of plasmon resonance wavelength division multiplexer, is opened on metallic film by metallic film, and in Openworks shape
1 incident waveguide, more than 2 outgoing waveguide and more than 2 resonator form；It is emitted the quantity phase of waveguide resonant cavity
Together, 1 corresponding 1 resonator of outgoing waveguide；Incident waveguide is strip；The front end of incident waveguide extends to the side of metallic film
At edge, the rear end of incident waveguide extends to the middle part of metallic film；Each resonator is circle；Resonator distribution be arranged on into
The both sides and/or rear end that ejected wave is led；Each intra resonant cavity is embedded with the metal film block of 1 rectangle, and metal film block is located at
At the center of resonator；Each outgoing waveguide is strip；Resonator phase of the front end of each outgoing waveguide corresponding to it
Right, each rear end for being emitted waveguide extends to the edge of metallic film；Between resonator and incident waveguide and outgoing waveguide
Certain distance be present, and the bearing of trend for being emitted waveguide is vertical with the bearing of trend of incident waveguide and/or on same straight line.
In such scheme, metal film block is elongated rectangular shape.
In such scheme, the symmetrical centre of metal film block and the symmetrical centre of resonator coincide.
In such scheme, the size of the metal film block of all resonators and its inside is consistent.
In such scheme, incident waveguide is identical with the width of all outgoing waveguides.
In such scheme, the diameter of resonator is equal to the width of incident waveguide and is emitted twice of the width of waveguide.
In such scheme, outgoing the distance between waveguide and resonator be equal between the resonator and incident waveguide away from
From.
In such scheme, the number for being arranged on the resonator of the both sides of incident waveguide is identical.
In such scheme, resonator is set in the both sides of incident waveguide in specular.
Compared with prior art, it is of the invention by setting resonator in the both sides of incident waveguide and/or rear end, and in resonance
The opposite side of chamber sets outgoing waveguide to form multiplexer, and by adding a metal film block in each intra resonant cavity, makes
A F-P cavity can be formed by obtaining in resonator so that surface phasmon SPP realizes resonance coupling with resonator；So utilize
The resonance coupling of surface phasmon SPP and resonator acts on, and can be realized by adjusting the size of metallic film in resonator
Phasmon multiple signals separate and the regulation of each channel wavelength；Spacing can be coupled by changing simultaneously, embody specific coupling
Effect.
Brief description of the drawings
Fig. 1 is a kind of structural representation of plasmon resonance wavelength division multiplexer.
Fig. 2 is the structural representation of each plasmon resonance filter unit.
Fig. 3 is a kind of Pattern Filter spectrum of properties figure of plasmon resonance filter unit.
Fig. 4 is another Pattern Filter spectrum of properties figure of plasmon resonance filter unit.
Fig. 5 is the spectrum of properties figure of plasmon resonance wavelength division multiplexer.
Label in figure：1st, metallic film；2nd, incident waveguide；3rd, it is emitted waveguide；4th, resonator；5th, metal film block.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with instantiation, and with reference to attached
Figure, the present invention is described in more detail.It should be noted that the direction term mentioned in example, such as " on ", " under ",
" in ", " left side " " right side ", "front", "rear" etc., be only refer to the attached drawing direction.Therefore, the direction used is intended merely to explanation
For limiting the scope of the invention.
A kind of plasmon resonance wavelength division multiplexer, as shown in figure 1, being opened in by metallic film 1, and in Openworks shape
The outgoing waveguide 3 and the resonator 4 of more than 2 that 1 on metallic film 1 incident waveguide is more than 2,2 form.It is emitted waveguide 3
The quantity of resonant cavity 4 is identical, 1 corresponding 1 resonator 4 of outgoing waveguide 3.Incident waveguide 2 and 1 resonator 4 and 1 outgoing
Waveguide 3 forms a plasmon resonance filter unit, referring to Fig. 2.Resonator 4 and the quantity of outgoing waveguide 3, are determined
The multiplexing quantity of multiplexer of the present invention.In the present embodiment, resonator 4 and outgoing waveguide 3 are 3, are formed identical with 1
Input, the wavelength division multiplexer of 3 different outputs.
Metallic film 1 is made of the material of metallic film 1.In the present embodiment, the generally rectangle of metallic film 1.Metal
By hollow out mode on film 1, incident waveguide 2, the outgoing resonant cavity 4 of waveguide 3 are formed, so that incident waveguide 2, outgoing wave
The medium for leading filling in 3 resonant cavities 4 is air.
Incident waveguide 2 is strip.In the present embodiment, incident waveguide 2 is front and rear wide rectangular slat.Incident waveguide
2 front end extends to the edge of metallic film 1, forms the entrance port of light；The rear end of incident waveguide 2 extends to metallic film 1
Middle part.In the present embodiment, incident waveguide 2 is horizontal-extending is arranged on metallic film 1.
Each resonator 4 is circle.Resonator 4 is distributed the both sides and/or rear end for being arranged on incident waveguide 2, i.e. resonance
The distribution mode of chamber 4 has 2 kinds：A kind of is the both sides that all resonators 4 are distributed in incident waveguide 2；Another kind is 1 resonator
It is located at the rear end of resonator 4 in 4, remaining resonator 4 is distributed in the both sides of incident waveguide 2.And when resonator 4 is distributed in incidence wave
It when leading 2 both sides, can both allow all resonator 4 to be all distributed in the same sides of incident waveguide 2, and can also allow resonator 4
It is distributed in the both sides of incident waveguide 2.When resonator 4 is distributed in the both sides of incident waveguide 2, its preferably with uniform mode,
The quantity of the resonator 4 of the both sides distribution of i.e. incident waveguide 2 is identical, and resonator 4 is relative in mirror image in the both sides of incident waveguide 2
Set.In this embodiment, the rear end of resonator 4 is located in 1 resonator 4, the outgoing waveguide 3 corresponding to the resonator 4 is with entering
Ejected wave leads 2 on the same line；Other 2 resonators 4 are located at the both sides of incident waveguide 2 respectively, and are set in specular, this
Outgoing waveguide 3 and incident waveguide 2 corresponding to 2 resonators 4 is perpendicular.In order to ensure symmetrical performance, in this embodiment, own
The size of resonator 4 is consistent.
The metal film block 5 of 1 rectangle is embedded with inside each resonator 4.Metal film block 5 occurs with disk resonator 4
Resonance coupling, form a powerful local electromagnetic field so that resonator reveals filtering characteristic.In the present embodiment, metal
Film block 5 is elongated rectangular shape.Metal film block 5 is located at the center of resonator 4.In the present embodiment, the symmetrical centre of metal film block 5
Coincided with the symmetrical centre of resonator 4.In this embodiment, the size and dimension of all metal film blocks 5 is consistent.Metal film block
5 parallel to outgoing the bearing of trend of waveguide 3 width between 10nm~160nm.Metal film block 5 prolongs perpendicular to outgoing waveguide 3
The width in direction is stretched between 10nm~160nm.The bearing of trend of metal film block 5 mutually hangs down with being emitted the bearing of trend of waveguide 3
Directly.
Each outgoing waveguide 3 is strip.In the present embodiment, waveguide 3 is emitted as front and rear wide rectangular slat.Often
The front end of individual outgoing waveguide 3 and the resonator 4 corresponding to it are relative, and each rear end for being emitted waveguide 3 extends to metallic film 1
Edge, form the exit portal of light.When resonator 4 is located at the both sides of incident waveguide 2, outgoing waveguide 3 corresponding to it is prolonged
It is vertical with the bearing of trend of incident waveguide 2 to stretch direction；When resonator 4 is located at the front end of incident waveguide 2, outgoing waveguide 3 is prolonged
It is parallel with the bearing of trend of incident waveguide 2 to stretch direction, and on same straight line.
Certain distance be present between resonator 4 and incident waveguide 2 and outgoing waveguide 3.In this embodiment, it is emitted waveguide 3
The distance between resonator 4 is equal to the distance between the resonator 4 and incident waveguide 2.The one end of resonator 4 and incident waveguide 2
Coupling, the other end of resonator 4 couple with outgoing waveguide 3.In the present embodiment, the length root of incident waveguide 2 and outgoing waveguide 3
Change according to relevant parameter so that its wherein one end can extend to the edge of metallic film 1, but incident waveguide 2 and it is all go out
The width that ejected wave leads 3 is then identical, i.e. W1=W2=W3=W4.The diameter of resonator 4 is equal to the width and outgoing wave of incident waveguide 2
Lead 3 width twice, i.e. r=2W1.
In actual use, the present invention needs to be overlying in a medium substrate, and the medium substrate can be silicon (Si) or dioxy
SiClx (SiO2).Planar light is by the incident glancing incidence of waveguide 2, and coupled to enter resonator 4, resonator 4 is internally provided with metal
Film block 5, the surface phasmon of surface excitation traverse to outgoing waveguide 3 by tunnel-effect, and planar light is transmitted by outgoing waveguide 3
Light is emitted.Acted on using the resonance coupling of surface phasmon SPP and resonator 4, by adjusting metal film block 5 in resonator 4
The structural parameters such as size, the spacing of resonator 4 and incident waveguide 2 and outgoing waveguide 3, different property can be embodied, embodiment is not
Same function.It is explained below by an instantiation：
For the plasmon resonance filter unit shown in Fig. 2, the wide W1=50nm of incident waveguide 2, waveguide 3 is emitted
Wide W2=50nm.The radius r=100nm of resonator 4, resonator 4 is the same as adjacent waveguide spacing d=10nm.When hanging down for metal film block 5
Directly when the width h for being emitted the bearing of trend of waveguide 3 is larger, i.e. during h=120nm, by adjusting metal film block 5 in resonator 4
Parallel to the outgoing bearing of trend width s of waveguide 3 so that s points of the width parallel to the outgoing bearing of trend of waveguide 3 of metal film block 5
Wei 30nm, 60nm, 90nm and 120nm, you can obtain filter curve figure as shown in Figure 3.In figure 3, due to embedded metal
Block is wider, is interfered from coupling plasma excimer caused by incident waveguide 2 with embedded metal block in coupler, transmission peaks production
Raw latasuture, as metal film block 5 is continuously increased parallel to the outgoing bearing of trend width s of waveguide 3 increases, the interference of light.Work as metal
When the width h perpendicular to the outgoing bearing of trend of waveguide 3 of film block 5 is smaller, i.e. during h=20nm, by adjusting metal in resonator 4
Film block 5 parallel to outgoing the bearing of trend width s of waveguide 3 so that metal film block 5 parallel to outgoing the bearing of trend of waveguide 3 it is wide
It is respectively 40nm, 80nm, 1200nm and 160nm to spend s, you can obtains filter curve figure as shown in Figure 4.In Fig. 4, gold is embedded
Belong to block it is narrower, will not interfere, but with metal film block 5 parallel to outgoing the bearing of trend width s of waveguide 3 increase, light
Loss increase, transmissivity are gradually reduced.
On the basis of such as Fig. 2, by distinguishing 1 new resonator 4 of each coupling in the both sides of incident waveguide 2, new is humorous
Chamber 4 and outgoing waveguide 3 shake on the incident specular of waveguide 2, the multiplexers shown in Fig. 1 with 3 different outputs are formed, with this
Realize wavelength-division multiplex characteristic.For the plasmon resonance wavelength division multiplexer shown in Fig. 1, the wide W1=50nm of incident waveguide 2.
It is emitted the wide W2=W3=W4=50nm of waveguide 3.The radius r1=r2=r3=100nm of resonator 4,4 same adjacent waveguide of resonator
Spacing d=10nm.3 metal film blocks 5 are respectively s1=s2=s3=20nm parallel to the width of the outgoing bearing of trend of waveguide 3.
Width perpendicular to the outgoing bearing of trend of waveguide 3 is respectively h1=160nm, h2=120nm, h3=80nm.It can obtain such as Fig. 5 institutes
The wavelength-division multiplex spectrogram shown.
It should be noted that although embodiment of the present invention is illustrative above, but it is to the present invention that this, which is not,
Limitation, therefore the invention is not limited in above-mentioned embodiment.Without departing from the principles of the present invention, it is every
The other embodiment that those skilled in the art obtain under the enlightenment of the present invention, it is accordingly to be regarded as within the protection of the present invention.
Claims (9)
1. a kind of plasmon resonance wavelength division multiplexer, it is characterized in that, it is opened in by metallic film (1), and in Openworks shape
1 incident waveguide (2), the outgoing waveguide (3) of more than 2 and the resonator of more than 2 (4) composition on metallic film (1)；Go out
The quantity that ejected wave leads (3) resonant cavity (4) is identical, corresponding 1 resonator (4) of 1 outgoing waveguide (3)；
Incident waveguide (2) is strip；The front end of incident waveguide (2) extends to the edge of metallic film (1), incident waveguide
(2) rear end extends to the middle part of metallic film (1)；
Each resonator (4) is circle；Resonator (4) is distributed the both sides and/or rear end for being arranged on incident waveguide (2)；Each
The metal film block (5) of 1 rectangle is embedded with inside resonator (4), and metal film block (5) is located at the center of resonator (4)；
Each outgoing waveguide (3) is strip；The front end of each outgoing waveguide (3) with its corresponding to resonator (4) relatively,
The rear end of each outgoing waveguide (3) extends to the edge of metallic film (1)；
Certain distance between resonator (4) and incident waveguide (2) and outgoing waveguide (3) be present, and be emitted the extension of waveguide (3)
Direction is vertical with the bearing of trend of incident waveguide (2) and/or on same straight line.
2. a kind of plasmon resonance wavelength division multiplexer according to claim 1, it is characterized in that, metal film block (5) is
Elongated rectangular shape.
3. a kind of plasmon resonance wavelength division multiplexer according to claim 1 or 2, it is characterized in that, metal film block (5)
Symmetrical centre and the symmetrical centre of resonator (4) coincide.
4. a kind of plasmon resonance wavelength division multiplexer according to claim 1, it is characterized in that, all resonators (4)
And its size of internal metal film block (5) is consistent.
5. a kind of plasmon resonance wavelength division multiplexer according to claim 1, it is characterized in that, incident waveguide (2) and
The width of all outgoing waveguides (3) is identical.
6. a kind of plasmon resonance wavelength division multiplexer according to claim 5, it is characterized in that, resonator (4) it is straight
Footpath is equal to twice of the width of incident waveguide (2) and the width of outgoing waveguide (3).
7. a kind of plasmon resonance wavelength division multiplexer according to claim 1, it is characterized in that, outgoing waveguide (3) with
The distance between resonator (4) is equal to the distance between the resonator (4) and incident waveguide (2).
8. a kind of plasmon resonance wavelength division multiplexer according to claim 1, it is characterized in that, it is arranged on incident waveguide
(2) number of the resonator (4) of both sides is identical.
9. a kind of plasmon resonance wavelength division multiplexer according to claim 8, it is characterized in that, resonator (4) is entering
The both sides that ejected wave leads (2) are set in specular.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109212664A (en) * | 2018-10-30 | 2019-01-15 | 南京邮电大学 | A kind of bilateral coupled resonator T-wave division multiplexer based on phasmon |
| CN109324368A (en) * | 2018-08-15 | 2019-02-12 | 桂林电子科技大学 | A kind of logic output light source based on plasma filled waveguide |
| CN110146468A (en) * | 2019-05-14 | 2019-08-20 | 桂林电子科技大学 | A kind of circle composite holes array structure surface plasma fibre optical sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109324368A (en) * | 2018-08-15 | 2019-02-12 | 桂林电子科技大学 | A kind of logic output light source based on plasma filled waveguide |
| CN109212664A (en) * | 2018-10-30 | 2019-01-15 | 南京邮电大学 | A kind of bilateral coupled resonator T-wave division multiplexer based on phasmon |
| CN110146468A (en) * | 2019-05-14 | 2019-08-20 | 桂林电子科技大学 | A kind of circle composite holes array structure surface plasma fibre optical sensor |
| CN110146468B (en) * | 2019-05-14 | 2022-05-17 | 桂林电子科技大学 | Surface plasma optical fiber sensor with circular composite hole array structure |
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