CN105607190B - A kind of Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity based on add-drop type - Google Patents
A kind of Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity based on add-drop type Download PDFInfo
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- CN105607190B CN105607190B CN201610135823.4A CN201610135823A CN105607190B CN 105607190 B CN105607190 B CN 105607190B CN 201610135823 A CN201610135823 A CN 201610135823A CN 105607190 B CN105607190 B CN 105607190B
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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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29331—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by evanescent wave coupling
- G02B6/29335—Evanescent coupling to a resonator cavity, i.e. between a waveguide mode and a resonant mode of the cavity
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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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
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Abstract
The present invention provides a kind of, and three waveguides based on add-drop type couple the Deplexing apparatus of both sides' shape resonant cavity, belong to micronano optical field of communication technology.The characteristic that the present invention can be coupled using the surface plasma excimer in metal-insulator-metastructure structure in adjacent interfaces realizes the device of the demultiplexing of three waveguides coupling both sides' shape resonant cavity.The coupling distance between size and waveguide and resonant cavity by adjusting two rectangular resonant cavities obtains the reflection ipsilateral with incident light wave or electromagnetic wave port and the resonant wavelength that goes out, achievees the effect that demultiplexing with this.The present invention achievees the effect that demultiplexing using rectangular resonant cavity, and Deplexing apparatus production is simple, and convenient for integrated, and light wave or electromagnetic wave can efficiently be propagated in very narrow channel, and demultiplexing effect is preferable, and the resonant wavelength that reflection obtains is stablized.
Description
Technical field
The invention belongs to micronano optical fields of communication technology, and in particular to a kind of gold based on add-drop type waveguiding structure
Category-dielectric-metal (MIM) material devices are constituted using three waveguides coupling both sides' shape resonant cavity of surface plasma excimer
A kind of device with wavelength-division demultiplexing function.
Background technique
In the 21 century of this high speed information development, people are increasingly dependent on the reform and development of the communication technology.Future
Communication industry will also be continued to develop to high speed, integrated and safe etc..Since the transmission speed of electronics is low, so
The processing speed of electronic device is unable to reach the degree of the light velocity；The transmission speed of photon is fast, but the limitation of diffraction limit so that
The development of integrated photonic device receives restriction.Surface plasma excimer is such a can to propagate the good of information at a high speed
Good vector, when due to light wave or electromagnetic wave incident to metal surface, so that collective's concussion, light occur for the free electron of metal surface
Wave or electromagnetic wave couple with the free electron that metal surface is shaken and form a kind of near field electricity propagated along the metal surface
Magnetic wave.Under the influence of this interaction, surface plasma excimer not only has the speed of photonics, but also has
The scale of electronics.The strong locality of surface plasma excimer simultaneously, and the advantages that diffraction limit can be broken through, so that
Constraint manipulation can be carried out to light in the structure of sub-wavelength, so that surface plasma excimer device becomes the optics of a new generation
Integrated device.
1997, Little et al. just proposed the coupled system of add-drop waveguide coupling micro-loop chamber, logical to realize
Believe the filtering in channel.In this scheme, two parallel waveguides constitute add-drop structure, respectively as the port add and drop
Port.The waveguide of the port Add couples micro-loop chamber as input terminal, while micro-loop is coupled as output end with the waveguide of the end drop again, from
And realize the effect of filtering.In 2004, H.Rokhsari et al. coupled two optical fiber with a micro- core ring cavity simultaneously, real
Show the uplink download function of light, while having obtained the microcavity of high q-factor, experimentally demonstrates add-drop waveguide coupled resonance
The practicability of chamber.
Since nineteen sixty-eight, surface plasma excimer passes through prism knot using the method for decaying total reflection by Otto et al.
Since structure is realized, concept is gradually perfect therewith, and then becomes the research hotspot in the field.By the knot for changing metal surface
Structure, researchers gradually have found the new characteristic of some surface plasma excimers, so that the application of surface plasma excimer
Further expansion.2011, the Zhou Zhiping group of Peking University proposed the vallecular cavity Design of Bandpass based on plasma
Method.By changing the position of output waveguide, and the length and width and coupling distance of adjustment vallecular cavity, filtering has more been neatly realized
The band logical performance of device, and the bandpass filter also will have good application in nanoscale plasma integrated circuit.Together
April in year, the group disclose " Deplexing apparatus of the plasma vallecular cavity based on arrangement " again.Slot is arranged on the basis of before
Chamber controls the wavelength value of output by controlling length and width and the coupling distance of vallecular cavity, so that the device is logical in optical oomputing and light
There is good application in letter, especially in the wavelength division multiplex demultiplexing of nanoscale.2012, Hunan University's king's tinkling of pieces of jades et al.
A kind of " the surface plasma bandstop filter based on rectangular cavity MIM waveguiding structure " is disclosed, proposes and utilizes rectangle
The method that resonant cavity realizes filtering.Research currently based on the add-drop filter of surface plasma excimer is less, and right
The research that add-drop waveguide based on surface plasma excimer couples rectangular resonant cavity is even more blank.
Metal-dielectric-metal (metal-insulator-metal, abbreviation MIM) structure is to form surface plasma to swash
The basis of member, when two metal-medium interfaces suffer it is close enough when, surface plasma excimer meeting on two phase critical surfaces
It couples, to form metal-medium-metal surface plasma body excimer waveguide.This waveguide has very strong smooth local
Property, surface plasma excimer can be confined in areas of dielectric, can also propagate far distance at a high speed in broad spectral range.
Moreover, mim structure also has the advantages that many significant, for example, its production easy to process, can not only be conducive to realize optical path
Extra smallization and ultra high density it is integrated, moreover it is possible to so that light is carried out efficient propagation in very narrow channel.Thus, in future
In light integrated circuit, the optical device based on MIM waveguiding structure will have bright prospects in optical information is propagated and handled.
Summary of the invention
The object of the present invention is to provide a kind of, and three waveguides based on add-drop type couple the demultiplexing of both sides' shape resonant cavity
Device, to have filled up the blank for coupling rectangular resonant cavity research based on add-drop waveguide.The present invention is coupled rectangular with twin-guide
Based on the add-drop filter of resonant cavity, the Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity is realized, tune is passed through
The stiffness of coupling of the size and waveguide and resonant cavity that save resonant cavity realizes the effect of wavelength-division demultiplexing.
The Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity based on add-drop type of the invention, including three waves
It leads and is coupled with two rectangular resonant cavities, first wave guide and second waveguide with the first rectangular resonant cavity, first wave guide and third waveguide
It is coupled with the second rectangular resonant cavity.
The port of left and right two of label first wave guide is respectively Port1 and Port2, marks the end of left and right two of second waveguide
Mouth is respectively Port41And Port31, the port of left and right two of label third waveguide is respectively Port42And Port32；Electromagnetic wave or
Light wave is inputted from port Port1, is coupled respectively with the first rectangular resonant cavity, the second rectangular resonant cavity, later respectively from port
Port 41, port Port 42It reflects and goes out, transmit and go out from port Port 2, obtain two different central wavelengths.
The advantages and positive effects of the present invention are:
(1) present invention has filled up the blank that waveguide couples rectangular resonant cavity research, realizes three based on add-drop type
The Deplexing apparatus of waveguide coupling both sides' shape cavity resonator structure；
(2) Deplexing apparatus of the invention production is simple, and convenient for integrated, and light wave or electromagnetic wave can lead in very narrow
It is efficiently propagated in road, the resonant wavelength reflected is stablized, and demultiplexing effect is preferable.
Detailed description of the invention
Fig. 1 is the three-dimensional of the Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity of the invention based on add-drop type
Structure chart；
Fig. 2 is the two dimension of the Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity of the invention based on add-drop type
Structure chart；
Fig. 3 is the specific displaying reflection spectrogram of present invention demultiplexing effect.
Specific embodiment
Below in conjunction with attached drawing, the present invention is described in further detail.
In metal-insulator-metastructure structure, when two metal-dielectric interfaces are close enough, surface plasma excimer
It will couple, form metal-dielectric-metal surface plasmon wave guide, light is confined in areas of dielectric.And table
Surface plasma excimer can break through the characteristic of diffraction limit, so that it can carry out constraint behaviour to light in the structure of sub-wavelength
Make.Based on this, the invention proposes the Deplexing apparatus of three waveguides coupling both sides' shape cavity resonator structure based on add-drop type.
Coupled in rectangular cavity resonator structure in twin-guide, electromagnetic wave or light wave are inputted from one of port, surface etc. from
Daughter excimer is excited generation in the waveguide, couples with rectangular resonant cavity so that electromagnetic wave or light wave mainly from
The ipsilateral another port output of entry port, to realize simple filter action.With the increase of rectangular resonant cavity, output
Resonance wave long value red shift can occur therewith；Meanwhile as coupling distance increases, blue shift and coupling can occur therewith for resonant wavelength
Conjunction distance is bigger, and the resonant wavelength for reflecting and going out is fewer.So when the size of resonant cavity changes or resonant cavity with
Coupling distance between waveguide changes, and the output of resonant wavelength can be all affected to some extent.Based on this twin-guide coupling
The characteristics of closing rectangular resonator device, the present invention propose the Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity.Pass through adjusting
Coupling distance between the size and three waveguides and rectangular resonant cavity of two rectangular resonant cavities, to control the resonance wave of output
It is long, to realize the demultiplexing to input light wave or electromagnetic wave.
Core of the invention is that waveguide couples rectangular resonant cavity.The present invention couples the add- of rectangular resonant cavity with twin-guide
Based on drop filter, the Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity is proposed, by adjusting the big of resonant cavity
The stiffness of coupling of small and waveguide and resonant cavity realizes the effect of demultiplexing.
Fig. 1 is the 3 D stereo display diagram of three waveguides coupling both sides' shape resonant cavity.As shown in Figure 1, substrate (substrate)
For silicon materials, the material of groove part is formed for metallic silver (silver, chemical symbol Ag), in groove shown in figure all
It is filled with air.Shown in Fig. 1, first groove of label or so, two ports are respectively Port1 and Port2, adjacent with the first groove
The second groove and third groove, with the first groove between be provided with rectangular resonant cavity, the left and right of the second groove of label two
Port is respectively Port41And Port31, the port of left and right two of label third groove is respectively Port42And Port32.Wherein,
Electromagnetic wave or light wave enter from port Port 1 is incident, by transmiting and reflecting, respectively from port Port 2 and port Port
41, port Port 42Output.Accordingly, the first groove forms first wave guide, and the second groove forms second waveguide, third groove type
At third waveguide, being arranged between the first groove and the second groove is the first rectangular resonant cavity, the first groove and third groove it
Between to be arranged be the second rectangular resonant cavity.
Fig. 2 is the two-dimension plane structure plane of reference (Reference plane) of Fig. 1.Three load plasma waves in figure
Leading (Dielectric-loaded plasmonic waveguide) width is that ω electromagnetic wave or light wave are defeated from port Port1
Enter, is respectively L with upper and lower two side lengths1And L2Rectangular plasma resonant (Plasmonic Resonator) coupling.Its
In, the size strict control of rectangular resonant cavity reflection and the central wavelength value that goes out, the side length of rectangular resonant cavity and reflection and go out
Central wavelength be numerically in simple linear relationship.That is, reflecting and going out with the increase of rectangular resonant cavity side length
Central wavelength red shift can occur.In addition, coupling distance also affects reflection and central wavelength value out, with coupling distance
Increase, blue shift remaining less can occur for central wavelength, simultaneously as the increase of loss, reflectivity can also reduce accordingly therewith.Institute
With wavelength value desired in order to obtain, it is necessary to select the size of suitable coupling distance and rectangular resonant cavity, later light wave or electricity
Magnetic wave will be respectively from port Port 41, port Port 42It reflects and goes out, transmit and go out from port Port 2, obtain two kinds of differences
Central wavelength.
Fig. 3 is to be specifically defined the parameter of the device in order to preferably express this feature, draw port Port 41The end and
Mouth Port 42Reflection spectrogram.The side length for enabling two rectangular resonant cavities is respectively L1=500nm, L2=600nm, duct width are set
It is set to 50nm, coupling distance is all set as 20nm.When electromagnetic wave or light wave are incident from port Port 1, respectively with upper and lower two
A resonant cavity couples, and then light wave or electromagnetic wave are mainly from port Port 41With port Port 42It reflects and goes out, from port
Port 2 is transmitted and is gone out.In Fig. 3, solid line indicates port Port 41Reflection spectrogram, dotted line indicate port Port 42Reflectance spectrum
Figure, abscissa indicate that wavelength, unit nm, ordinate indicate reflectivity (drop efficiency).As seen from Figure 3, from
Port Port 41With port Port 42All there is a peak value in the light wave or electromagnetic wave for reflecting and going out, the position of peak value is humorous
Chamber size of shaking and coupling distance are coefficient as a result, and port Port 41With port Port 42The peak value for reflecting and going out
Wavelength is the wavelength value for demultiplexing effect and being distinguished.That is, the device of the invention realizes two peak values in Fig. 3
The demultiplexing of wavelength.
To sum up, the present invention devises a kind of demultiplexing for three waveguides coupling both sides' shape resonant cavity based on add-drop filter
With device, which takes full advantage of metal-insulator-metastructure structure can generate surface etc. under the excitation of light wave or electromagnetic wave
The characteristic and surface plasma excimer of gas ions excimer can break through diffraction limit, and right in the structure of sub-wavelength
Light carries out the advantages that constraint manipulation, with respect to the background art in the document mentioned, present invention production is more simple, convenient for integrated,
And it is preferable to demultiplex effect.
Claims (1)
1. a kind of Deplexing apparatus of three waveguides coupling both sides' shape resonant cavity based on add-drop type, which is characterized in that including
Three waveguides and two rectangular resonant cavities, first wave guide and second waveguide are coupled with the first rectangular resonant cavity, first wave guide and the
Three waveguides are coupled with the second rectangular resonant cavity；
The port of left and right two of label first wave guide is respectively Port1 and Port2, marks the port of left and right two point of second waveguide
It Wei not Port41And Port31, the port of left and right two of label third waveguide is respectively Port42And Port32；Electromagnetic wave or light wave
It inputs, is coupled respectively with the first rectangular resonant cavity, the second rectangular resonant cavity, later respectively from port Port from port Port1
41, port Port 42It reflects and goes out, transmit and go out from port Port 2, obtain two different central wavelengths；
The coupling distance between size and three waveguides and rectangular resonant cavity by adjusting two rectangular resonant cavities, to control
Make the resonant wavelength of output；The size of rectangular resonant cavity controls reflection and central wavelength value out, the side length of rectangular resonant cavity
With reflection and go out central wavelength it is numerically in a linear relationship.
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| CN106019473A (en) * | 2016-07-14 | 2016-10-12 | 陕西师范大学 | Micro-nano-structured wave division multiplexer based on Ag/air medium |
| CN109166644B (en) * | 2018-09-16 | 2019-12-17 | 萧县众科电磁检测有限公司 | Preparation method of adjustable waveguide system for X-ray nanoscale focusing |
| CN109243663B (en) * | 2018-09-16 | 2020-10-02 | 马鞍山金瓦格机械科技有限公司 | Adjustable waveguide system for X-ray nanoscale focusing |
| CN110568553A (en) * | 2019-10-10 | 2019-12-13 | 桂林电子科技大学 | All-optical plasma switch based on resonant cavity coupling metal waveguide structure |
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| CN101196596A (en) * | 2007-10-24 | 2008-06-11 | 北京航空航天大学 | Adjustable optical notch filter based on dicyclo resonant cavity |
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