CN206947491U - A kind of open Fabry Perrault resonator based on surface wave photonic crystal - Google Patents
A kind of open Fabry Perrault resonator based on surface wave photonic crystal Download PDFInfo
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- CN206947491U CN206947491U CN201720631293.2U CN201720631293U CN206947491U CN 206947491 U CN206947491 U CN 206947491U CN 201720631293 U CN201720631293 U CN 201720631293U CN 206947491 U CN206947491 U CN 206947491U
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Abstract
The utility model discloses a kind of open Fabry Perrault resonator based on surface wave photonic crystal.In the surface wave photonic crystal that periodicity columnar metal structure is formed on metal flat open Fabry Perrault resonator is formed by reducing part metals post pillar height, the metal column is equal with the distance between post, and the distance is less than the half of surface wave operation wavelength；The resonant frequency of the resonator is in around within the forbidden band of the surface wave photonic crystal of higher metal post composition；Metal column after the reduction height is highly identical.The open cavity of the utility model design is formed by the forbidden band based on surface wave photonic crystal, so having higher quality factor compared to traditional Fabry Perrault resonator, can improve the sensitivity of surrounding medium refractive index detection.
Description
Technical field
The utility model belongs to plasma Fabry Perrault resonator field, and in particular to one kind is based on surface wave photon
The open Fabry Perrault resonator of crystal.
Background technology
Fabry Perrault resonator is a kind of resonator being made up of two pieces of reflecting plates, and electromagnetic wave is between two pieces of reflecting plates
Multiple reflections form standing wave.
Surface plasma excimer (surface plasmon polaritons, abbreviation SPPs) is that one kind is present in optics
Mixed activation state of the wave band along the photon and electronics of metal and dielectric interface.Surface plasma excimer not only possesses breakthrough and spread out
The sub-wavelength of emitter-base bandgap grading limit can be propagated from constraint as electromagnetic wave in metal surface, hold promise as very much following height
The information carrier of integrated level, subminaturization Terahertz and optical integrated circuit system.
Existing plasma Fabry Perrault resonator is a kind of metal nanometer line of length, and surface plasma is in nanometer
Above-the-line promotion and its both ends produce reflect to form resonance.Or in microwave terahertz wave band it is one section of time-limited artificial surface
Plasma filled waveguide, it also can form reflection at both ends and produce resonance.Because existing plasma Fabry Perrault resonator
It is located in air, so not only serious scattering, and the constraint that surface etc. is in vitro can produced at the both ends of resonator
Not strong, the quality factor for so resulting in existing Fabry Perrault resonator are very low.And existing Fabry Perrault resonance
Chamber once machines, and its resonant frequency and the number of mode of resonance are nonadjustable, and this significantly limit its application.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of based on the new of surface wave photonic crystal
The open Fabry Perrault resonator of type.
Open Fabry Perrault resonator based on surface wave photonic crystal, it is periodicity metal on the metal surface
Column structure form surface wave photonic crystal in by reduce part metals post pillar height formed resonator, the metal column with
The distance between post is equal, and the distance is less than the half of surface wave operation wavelength；At the resonant frequency of the resonator
Around within the forbidden band for the surface wave photonic crystal that higher metal post forms；Metal column height phase after the reduction height
Together.
Preferably, the described metal column for being lowered height is continuously arranged metal column, is lowered the metal column of height
Form resonator.Continuously arranged metal column may be constructed the structure of linear structure, block structure or any other shape.Continuously
Arrangement refers to that at least one direction of the metal column for being lowered pillar height abuts with other metal columns for being lowered pillar height, without by higher
Metal column surrounds completely.
Preferably, the described metal column for being lowered height is respectively positioned on inside surface wave photonic crystal.
Preferably, the described metal column for being lowered height is arranged in a linear.
Preferably, the described metal column for being lowered height is curved or broken line arranges.
Preferably, the described metal column for being lowered height is in 90 ° of broken lines arrangement without bending radius.
The open Fabry Perrault resonator of the utility model design, is compared with traditional resonator, the resonator
Model number and resonant frequency can be adjusted by changing the number of defect metal column, in microwave Terahertz integrated circuit
There is important application.
The open cavity of the utility model design is formed by the forbidden band based on surface wave photonic crystal, so phase
Than there are higher quality factor in traditional Fabry Perrault resonator, the sensitivity of surrounding medium refractive index detection can be improved.
Brief description of the drawings
Fig. 1 is the structural representation of the open Fabry Perrault resonator based on surface wave photonic crystal；
The Fabry Perrault resonator experimental provision schematic diagram that Fig. 2 (a) is made up of seven defect metal columns；Fig. 2 (b) is to open
Put the near field resonance spectrum of formula Fabry Perrault resonator；Supported by open Fabry Perrault resonator seven of Fig. 2 (c)
The distribution map of the electric field of mode of resonance；
The near field resonance spectrum for the open Fabry Perrault resonator that Fig. 3 (a) is made up of three defect metal columns；Fig. 3
(b) three modes of resonance supported for the open Fabry Perrault resonator；Fig. 3 (c) open Fabry Perraults are humorous
The distribution map of the electric field for three modes of resonance that the chamber that shakes is supported.
Embodiment
Open Fabry Perrault resonator such as Fig. 1 institutes based on surface wave photonic crystal designed by the utility model
Show, by reducing part metals pillar height in the surface wave photonic crystal that periodicity columnar metal structure is formed on metal flat
Spend to form resonator.The height of metal cylinder is H=5mm, radius r=1.25mm, cycle d=5mm, passes through eigen mode
Analysis can obtain the surface wave photonic crystal and a surface wave forbidden photon band be present in 12.6GHz to 27GHz.In order in this table
Fabry Perrault resonator is designed on the ripple photonic crystal of face, the height of wherein several metal columns is reduced to h by we from H=5mm
=4.3mm, the resonant frequency for the resonator being so made up of shorter metal column are just in what the longer metal column of surrounding formed
Within the forbidden band of surface wave photonic crystal.
Shown in experimental provision such as Fig. 2 (a), we excite the resonator by the use of a monopole antenna as excitaton source, use
Another monopole antenna detects the near field frequency spectrum of the resonator as probe.The defects of resonator, metal column number was N
Shown in=7, its near field frequency spectrum such as Fig. 2 (b), it can be seen that a total of seven resonant modes in circumferential surface ripple photonic crystal band
Formula.Frequency is respectively M0, M1, M2, M3, M4, M5, M6 from low to high.Using microwave near-field imaging system we scan this seven
The distribution map of the electric field of individual mode of resonance, as shown in Fig. 2 (c).It may be seen that their pattern is the Fabry Perrault of standard
Cavity modes.
The defects of by adjusting the resonator metal column number, we can not only adjust the resonance of same mode of resonance
Frequency, the total number of cavity modes can also be adjusted.As shown in Fig. 3 (a), the metal column when we are composition resonator the defects of
When number is reduced to N=3, we can only observe 3 modes of resonance within surrounding photonic crystal forbidden band, such as Fig. 3 (b) institutes
Show.Shown in its corresponding distribution map of the electric field such as Fig. 3 (c), frequency is respectively M0, M1, M2 from low to high.The wherein resonance of M0 patterns
The 12.94GHz that frequency is N=3 from N=7 12.65GHz rises.
Claims (6)
1. a kind of open Fabry Perrault resonator based on surface wave photonic crystal, it is characterised in that it is in metal flat
The resonator formed in the surface wave photonic crystal that upper periodicity columnar metal structure is formed by reducing part metals post pillar height,
The metal column is equal with the distance between post, and the distance is less than the half of surface wave operation wavelength；The resonator
The resonant frequency surface wave photonic crystal that is in around higher metal post composition forbidden band within；Gold after the reduction height
It is identical to belong to pillar height degree.
2. the open Fabry Perrault resonator according to claim 1 based on surface wave photonic crystal, its feature exist
It is continuously arranged metal column in the described metal column for being lowered height, the metal column for being lowered height forms open method cloth
In Perrault resonator.
3. the open Fabry Perrault resonator according to claim 2 based on surface wave photonic crystal, its feature exist
It is respectively positioned in the described metal column for being lowered height inside surface wave photonic crystal.
4. the open Fabry Perrault resonator according to claim 2 based on surface wave photonic crystal, its feature exist
It is arranged in a linear in the described metal column for being lowered height.
5. the open Fabry Perrault resonator according to claim 2 based on surface wave photonic crystal, its feature exist
In the described metal column for being lowered height is curved or broken line arrangement.
6. the open Fabry Perrault resonator according to claim 5 based on surface wave photonic crystal, its feature exist
In the described metal column for being lowered height in 90 ° of broken lines arrangement without bending radius.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720631293.2U CN206947491U (en) | 2017-06-01 | 2017-06-01 | A kind of open Fabry Perrault resonator based on surface wave photonic crystal |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181037A (en) * | 2017-06-01 | 2017-09-19 | 深圳凌波近场科技有限公司 | Open Fabry Perrault resonator based on surface wave photonic crystal |
| CN113261159A (en) * | 2019-04-04 | 2021-08-13 | 华为技术有限公司 | Composite artificial dielectric and multiband antenna feed |
-
2017
- 2017-06-01 CN CN201720631293.2U patent/CN206947491U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181037A (en) * | 2017-06-01 | 2017-09-19 | 深圳凌波近场科技有限公司 | Open Fabry Perrault resonator based on surface wave photonic crystal |
| CN107181037B (en) * | 2017-06-01 | 2020-09-15 | 深圳凌波近场科技有限公司 | Open Fabry Perot resonant cavity based on surface wave photonic crystal |
| CN113261159A (en) * | 2019-04-04 | 2021-08-13 | 华为技术有限公司 | Composite artificial dielectric and multiband antenna feed |
| CN113261159B (en) * | 2019-04-04 | 2022-12-13 | 华为技术有限公司 | Composite artificial dielectric and multiband antenna feeder |
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