CN108318964A - A kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency - Google Patents
A kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency Download PDFInfo
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- CN108318964A CN108318964A CN201810196631.3A CN201810196631A CN108318964A CN 108318964 A CN108318964 A CN 108318964A CN 201810196631 A CN201810196631 A CN 201810196631A CN 108318964 A CN108318964 A CN 108318964A
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- optical fiber
- meta materials
- selenium corn
- realizing high
- circular hole
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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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
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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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02295—Microstructured optical fibre
- G02B6/02314—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes
- G02B6/02342—Plurality of longitudinal structures extending along optical fibre axis, e.g. holes characterised by cladding features, i.e. light confining region
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
A kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency.The invention discloses a kind of Meta Materials optical fiber for realizing high-selenium corn in terahertz wave band.The Meta Materials optical fiber of the present invention is made of fibre core and covering；The material of the fibre core is metallic gold；The material of the covering is dielectric substance；Have in the covering it is parallel with optical fiber axial direction, surround the equally distributed circular hole of fiber axis, and Au micro wires are filled in circular hole, micro-structure is collectively formed in Au micro wires and the circular hole of filling.The Meta Materials optical fiber of the present invention can realize omnidirectional high-selenium corn to the electromagnetic wave in the particular polarization direction for impinging perpendicularly on optical fiber side surface, relieve limitation of the existing Meta Materials wave absorbing device to incident electromagnetic wave direction, the optical fiber can be prepared by existing fiber technology of preparing simultaneously, and manufacturing cost is low.
Description
Technical field
The invention belongs to Meta Materials technical field of optical fiber, and in particular to a kind of super material for realizing high-selenium corn in Terahertz frequency
Expect optical fiber.
Background technology
Meta Materials are a kind of artificial composite structure materials for the extraordinary physical property not having with natural material, wherein
Most typical Meta Materials are exactly the electromagnetism Meta Materials that can manipulate electromagnetic wave.The electromagnetic property of electromagnetism Meta Materials is not dependent on group
At the intrinsic properties of material, and depending on the micro-structure of Meta Materials.When Meta Materials and electromagnetic wave interact, electromagnetism
Characteristic can be indicated with effective dielectric constant and equivalent permeability.Therefore, pass through the structural unit for designing Meta Materials and related ruler
It is very little, so that it may to regulate and control to Meta Materials effective dielectric constant and equivalent permeability, to realize work(of the Meta Materials to electromagnetic wave
It can manipulate.These characteristics of electromagnetism Meta Materials make it can be applied to material with negative refractive index, perfect lens and electromagnetism stealth etc. many
Field.
THz wave refers to frequency between 0.1 ~ 10 THz（1 THz=1012Hz）, wavelength is between 0.03 ~ 3 mm ranges, place
One section of electromagnetic wave between microwave and far infrared radiation.The tera-hertz spectra of many substances include very abundant physics and
Chemical information, this is of great significance for the exploration of the structure of matter.In addition, the space of THz wave, temporal resolution are all very
Height, and photon energy is low, is not easy to damage tested substance, thus terahertz time-domain spectroscopic technology, THz imaging technology,
The fields such as safety inspection and Terahertz radar are significant.But at present other than Terahertz light source and detector, lack
The functional material and device of terahertz wave band strongly limit the development and extensive use of Terahertz Technology.Therefore it furthers investigate
Novel terahertz light function element, effective control to realizing THz wave is necessary, and Terahertz Meta Materials are to realize again
Unique medium of miscellaneous THz wave regulation and control.
Absorbing meta-material is that a kind of nature is not present, by the electromagnetism Meta Materials of engineer and making.Work as electromagnetic wave
It is incident on the surface of metamaterial structure, it is mainly interacted by the electric field and magnetic field of micro-structure and electromagnetic wave simultaneously,
Electricity, magnetic resonance realization suction wave are generated, realization is perfect to be absorbed, and has the characteristics that structure is ultra-thin, small, absorptivity is high.From 2008
Since year N.I.Landy et al. designs Meta Materials perfection wave absorbing device for the first time, Meta Materials wave absorbing device obtains fast-developing, suction wave
Frequency range extends to Terahertz, infrared and optical frequency wave band from microwave band.While in order to overcome Meta Materials wave absorbing device work frequency
The shortcomings that rate narrow range, has been designed that double frequency-band, multiband and the Meta Materials in broadband wave absorbing device, it can be achieved that multiband is hidden
Body purpose.
Existing Meta Materials wave absorbing device is usually three layer plane structures of metal-dielectric-metal, and top layer is structure list
Member mainly generates electric resonance；Underlying metal is then to transmit in order to prevent, and generate magnetic resonance with top level structure unit.It is existing
Meta Materials wave absorbing device defect mainly has at 2 points：First, only generating high-selenium corn to the electromagnetic wave of specific direction incidence；Second is that two dimension is flat
The preparation methods such as face Meta Materials generally use electron beam lithography, focused-ion-beam lithography or photoetching, these preparation methods cost pole
Height, complex process, and the accuracy of manufacture are difficult to control.
Different from the Meta Materials wave absorbing device of existing two-dimension plane structure, due to the special symmetry of optical fiber structure, for hanging down
Omnidirectional high-selenium corn may be implemented in the electromagnetic wave in the straight particular polarization direction for being incident on optical fiber side surface, optical fiber, relieves existing
There is limitation of the Meta Materials wave absorbing device to incident electromagnetic wave direction.In addition, existing plane Meta Materials wave absorbing device needs to pass through electron beam
Prepared by the high cost method such as etching, focused ion beam, photoetching, and the optical fiber with absorbing property can utilize existing fiber to prepare skill
Art is realized, manufacturing cost can be greatly reduced.
Invention content
A kind of high-selenium corn is realized in view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide in Terahertz frequency
Meta Materials optical fiber.The optical fiber can realize the electromagnetic wave in the particular polarization direction for impinging perpendicularly on optical fiber side surface omnidirectional
High-selenium corn relieves limitation of the existing Meta Materials wave absorbing device to incident electromagnetic wave direction, while the optical fiber passes through existing fiber system
Standby technology can be prepared, and manufacturing cost is low.
The purpose of the present invention is achieved through the following technical solutions.
A kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency, is made of fibre core and covering；
The material of the fibre core is metallic gold（Au）；
The material of the covering is dielectric substance；Have in the covering parallel with optical fiber axial direction, uniform around fiber axis
Multiple circular holes of distribution, and Au micro wires are filled in circular hole, micro-structure is collectively formed in Au micro wires and the circular hole of filling.
Preferably, the radius of the fibre core is 130 ~ 150 μm.
Preferably, the thickness of the covering is 4.5 ~ 5.5 μm.
Preferably, the dielectric constant of the dielectric substance is 4.0, dielectric loss factor 0.025.
Preferably, a diameter of 2 μm of the circular hole.
Preferably, the diameter of the Au micro wires is identical as the diameter of circular hole.
Preferably, the length of the Au micro wires is 25 ~ 28 μm, and one section or more Au micro wire is inserted in each circular hole,
And one section or more Au micro wire is arranged along optical fiber axial direction at the period in each circular hole.
It is furthermore preferred that the length in the period is 30 ~ 32 μm.
Preferably, the central angle between two neighboring circular hole is 10 ° ~ 12 °.
Preferably, the hole heart of the circular hole is 3 μm away from the distance on fibre core surface.
Compared with prior art, the invention has the advantages that and advantageous effect：
（1）The Meta Materials optical fiber that high-selenium corn is realized in Terahertz frequency of the present invention is different from the super of existing two-dimension plane structure
Material wave absorbing device, due to the special symmetry of optical fiber structure, for impinging perpendicularly on the particular polarization direction of the optical fiber side surface
Electromagnetic wave, which can realize that omnidirectional high-selenium corn, peak absorbance rate are up to 99%, relieve existing Meta Materials wave absorbing device
Limitation to incident electromagnetic wave direction；
（2）The present invention's realizes that the Meta Materials optical fiber of high-selenium corn is inhaled different from existing two dimensional surface Meta Materials in Terahertz frequency
Wave device need to use the high cost method such as electron beam lithography, focused ion beam or photoetching to prepare, first by existing fiber technology of preparing
Continuous optical fiber first is obtained using rod-in-tube technique, is then interrupted the Au lines in covering in specific position using laser action, is formed
Periodic structure can be prepared, and technology of preparing is simple, efficient, at low cost.
Description of the drawings
Fig. 1 is the assembling schematic diagram that the Meta Materials optical fiber of high-selenium corn is realized in Terahertz frequency of the present invention；
Fig. 2 a are the front view that the Meta Materials optical fiber of high-selenium corn is realized in Terahertz frequency of the present invention；
Fig. 2 b are the vertical view that the Meta Materials optical fiber of high-selenium corn is realized in Terahertz frequency of the present invention；
Fig. 3 is that the circular hole periodically in the covering that Terahertz frequency realizes the Meta Materials optical fiber of high-selenium corn of the present invention arranges
Au microns of arrangement schematic diagram；
Fig. 4 is the absorption curve figure that the Meta Materials optical fiber of high-selenium corn is realized in Terahertz frequency of the present invention.
Specific implementation mode
Technical solution of the present invention is described in further detail below in conjunction with specific embodiment and attached drawing, but the present invention
Protection domain and embodiment are without being limited thereto.
In specific embodiment, a kind of assembly signal of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency of the invention
Figure is as shown in Figure 1, front view（Cross section）Distinguish with vertical view as shown in Figure 2 a and 2 b；
Optical fiber is made of fibre core and covering；
The material of fibre core is metallic gold（Au）, the radius of fibre core（r）It is 140 μm；
The material of covering is dielectric substance, the dielectric constant of dielectric substance（ɛ）It is 4.0, dielectric loss factor（tanδ）For
0.025；The thickness of covering（dc）It is 5 μm；
In covering have it is parallel with optical fiber axial direction, surround equally distributed 30 circular holes of fiber axis；The hole heart of circular hole is away from fibre core
The distance on surface（d）It is 3 μm, a diameter of 2 μm of circular hole, the central angle between two neighboring circular hole（θ）It is 12 °；And in circular hole
Au micro wires are filled with, the diameter of Au micro wires is identical as the diameter of circular hole, the length of Au micro wires（L）It is 26 μm, Mei Yiyuan
Multistage Au micro wires are inserted in hole, and multistage Au micro wires are arranged along optical fiber axial direction at the period in each circular hole（Such as Fig. 3
It is shown）, the length in period（a）It is 30 μm；Micro-structure is collectively formed with circular hole in the Au micro wires of filling.
When incident electromagnetic wave impinges perpendicularly on optical fiber surface, E field polarization direction passes through finite time-domain along optical fiber axial direction
Calculus of finite differences calculate, obtain the absorption curve figure of the Meta Materials optical fiber under the incident electromagnetic wave in particular polarization direction as shown in figure 4,
As shown in Figure 4, the specific absorption rate peak of the optical fiber is up to 99%.
Claims (9)
1. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency, which is characterized in that be made of fibre core and covering；
The material of the fibre core is metal Au；
The material of the covering is dielectric substance；Have in the covering parallel with optical fiber axial direction, uniform around fiber axis
Multiple circular holes of distribution, and Au micro wires are filled in circular hole, micro-structure is collectively formed in Au micro wires and the circular hole of filling.
2. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that institute
The radius for stating fibre core is 130 ~ 150 μm.
3. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that institute
The thickness for stating covering is 4.5 ~ 5.5 μm.
4. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that institute
The dielectric constant for stating dielectric substance is 4.0, dielectric loss factor 0.025.
5. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that institute
State circular hole a diameter of 2 μm.
6. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that institute
The diameter for stating Au micro wires is identical as the diameter of circular hole.
7. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that institute
The length for stating Au micro wires is 25 ~ 28 μm, and one section or more Au micro wire, and one section or more Au micro wire are inserted in each circular hole
It arranges at the period along optical fiber axial direction in each circular hole；The length in the period is 30 ~ 32 μm.
8. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that phase
Central angle between adjacent two circular holes is 10 ° ~ 12 °.
9. a kind of Meta Materials optical fiber for realizing high-selenium corn in Terahertz frequency according to claim 1, which is characterized in that institute
It is 3 μm that the hole heart of circular hole, which is stated, away from the distance on fibre core surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810196631.3A CN108318964B (en) | 2018-03-09 | 2018-03-09 | Metamaterial optical fiber for realizing high absorption at terahertz frequency |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810196631.3A CN108318964B (en) | 2018-03-09 | 2018-03-09 | Metamaterial optical fiber for realizing high absorption at terahertz frequency |
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| CN108318964A true CN108318964A (en) | 2018-07-24 |
| CN108318964B CN108318964B (en) | 2020-01-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721376A (en) * | 2021-07-29 | 2021-11-30 | 暨南大学 | Light-operated terahertz optical fiber modulator and light amplitude modulation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090147344A1 (en) * | 2006-01-31 | 2009-06-11 | Optronic Laboratories, Inc. | Integrated high efficiency multi-stage acousto-optic modulator |
| CN105068179A (en) * | 2015-08-31 | 2015-11-18 | 中国科学院半导体研究所 | Fiber structure containing metal |
| CN105759346A (en) * | 2016-04-01 | 2016-07-13 | 哈尔滨工程大学 | SPP optical fiber based on gold nanowires and preparation method |
| CN105759345A (en) * | 2016-04-01 | 2016-07-13 | 哈尔滨工程大学 | SPP optical fiber based on gold nanotubes and preparation method |
-
2018
- 2018-03-09 CN CN201810196631.3A patent/CN108318964B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090147344A1 (en) * | 2006-01-31 | 2009-06-11 | Optronic Laboratories, Inc. | Integrated high efficiency multi-stage acousto-optic modulator |
| CN105068179A (en) * | 2015-08-31 | 2015-11-18 | 中国科学院半导体研究所 | Fiber structure containing metal |
| CN105759346A (en) * | 2016-04-01 | 2016-07-13 | 哈尔滨工程大学 | SPP optical fiber based on gold nanowires and preparation method |
| CN105759345A (en) * | 2016-04-01 | 2016-07-13 | 哈尔滨工程大学 | SPP optical fiber based on gold nanotubes and preparation method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113721376A (en) * | 2021-07-29 | 2021-11-30 | 暨南大学 | Light-operated terahertz optical fiber modulator and light amplitude modulation method thereof |
| CN113721376B (en) * | 2021-07-29 | 2023-08-01 | 暨南大学 | Light-operated terahertz optical fiber modulator and light amplitude modulation method thereof |
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| CN108318964B (en) | 2020-01-14 |
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