CN206411337U - A kind of enhanced near field optic antenna of field homogeneity - Google Patents
A kind of enhanced near field optic antenna of field homogeneity Download PDFInfo
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- CN206411337U CN206411337U CN201720058641.1U CN201720058641U CN206411337U CN 206411337 U CN206411337 U CN 206411337U CN 201720058641 U CN201720058641 U CN 201720058641U CN 206411337 U CN206411337 U CN 206411337U
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Abstract
The utility model discloses a kind of enhanced near field optic antenna of field homogeneity, belong to photoelectron and optical communication technology field.The technical solution of the utility model main points are：A kind of enhanced near field optic antenna of field homogeneity, including dielectric layer and the metal structure being arranged on dielectric layer, metal structure is back font structure, this time font structure includes discontinuous rectangular inner cavity and discontinuous rectangle exocoel, spacing wherein between discontinuous rectangular inner cavity and discontinuous rectangle exocoel is 35nm, discontinuous rectangular inner cavity is made up of four the first L-shaped nanometer metal bodies and four the first rectangle nanometer metal bodies, and discontinuous rectangle exocoel is made up of four the second L-shaped nanometer metal bodies and eight the second rectangle nanometer metal bodies.The utility model mentality of designing is simple, and integration is good, wide using scope, and the near field optic antenna of different-waveband can be designed according to the characteristic of different materials, and the opto-electronic device for particularly designing optical communication wave band with semi-conducting material has prior practical value.
Description
Technical field
The utility model belongs to photoelectron and optical communication technology field, and in particular to a kind of enhanced near field light of field homogeneity
Learn antenna.
Background technology
In recent years, as traditional antenna uses the limitation in field, the research of optical antenna becomes current popular direction, obtained
Extensive concern is arrived.People are started to design and are strengthened nanoscale light and material using the model structure of various optical antennas
Interaction.The definition of optical antenna is similar to microwave antenna, is exactly for local energy and free space optical radiation high-efficiency phase
The energy transducer mutually converted.But optical frequency antenna is again different from usual microwave antenna, optical frequency antenna divides the smaller fluorescence of yardstick
The active mediums such as son, quantum dot are as feed.Equal, these active mediums also have level structure in itself.In optical frequency ripple
Section, these fluorescence molecules are generally uniformly applied to around corresponding optical antenna by we.Such their phase interactions with antenna
With directly carrying out, the intervention without intermediary.In this respect, traditional antenna has very big difference with optical antenna.
In addition to metal material, the medium of high index of refraction can also be used by making optical antenna.
The optical antenna difference maximum with microwave antenna is
U.S. conductor, but the lossy medium with certain skin depth.Meanwhile, there is surface plasma in optical frequencies metal surface
Ripple, therefore the operation wavelength of optical antenna and the operation wavelength of traditional antenna are different.Because metal is perfect conductor in itself, pass
Supported system be a kind of TEM ripples by antenna, and because electromagnetic wave can not penetrate metal, the operation wavelength of traditional antenna be with
Vacuum wavelength is equal.For optical antenna, electromagnetic wave is partly to enter metal inside, thus its operation wavelength with it is true
Air situation condition is different.When optical antenna yardstick is less than the skin depth of metal, the operation wavelength of optical antenna can also be obtained
To greatly compressing.But this also provides a kind of method for being used for obtaining the minimum hot spot for breaking through diffraction limit.
Optical antenna is quite similar with microwave antenna, and single both have important difference in physical property, essentially consist in
Metal is no longer perfact conductor in optical frequencies, but the plasma described with free electron gas goes to replace.Furthermore optics day
Line is also no longer to be driven as classical antenna with electric current, but shakes to excite altogether with the local fields of the distributing point close to antenna
Shake.Optical antenna has various non-classical shapes simultaneously（Such as nanometer rods, needle point, nanosphere etc.）, because surface etc.
Ion plasmon resonance, also and material, shape etc. is closely related for the property of optical frequency antenna.
The content of the invention
The utility model provides a kind of magnetic to solve the localization enhancing problem of current near field optic Electromagnetic Fields of Antenna
Uniform enhanced near field optic antenna, makes the inner-cavity structure of coil antenna and outer by suitably changing optical antenna structure cell
There is cavity configuration periodically segmentation to rise and fall, so as to change the characteristics of motion that inner antenna can flow, be moved by original same-phase
It is changed into anti-phase movement so that uniform enhancing is presented in rectangular cavity for magnetic field and spatial distribution is very flat.
The utility model adopts the following technical scheme that to solve above-mentioned technical problem, a kind of enhanced near field light of field homogeneity
Learn antenna, including dielectric layer and the metal structure that is arranged on dielectric layer, it is characterised in that：Described metal structure is Back Word type
Structure, this time font structure includes discontinuous rectangular inner cavity and discontinuous rectangle exocoel, wherein discontinuous rectangular inner cavity and interruption
Spacing between formula rectangle exocoel is 35nm, and described discontinuous rectangular inner cavity is by four the first L-shaped nanometer metal bodies and four
First rectangle nanometer metal body is constituted, wherein four the first L-shaped nanometer metal bodies constitute four corners of discontinuous rectangular inner cavity,
The short side level of this four the first L-shaped nanometer metal bodies is relatively and long side is relative vertically, four the first rectangle nanometer metal bodies point
It is not correspondingly arranged between the relative longer side and a shorter side of the first L-shaped nanometer metal body, the first rectangle nanometer metal body and both sides
Spacing between the first adjacent L-shaped nanometer metal body is 25nm, and described discontinuous rectangle exocoel is by four the second L-shaped nanometers
Metallic object and eight the second rectangle nanometer metal body compositions, wherein four the second L-shaped nanometer metal bodies are constituted outside discontinuous rectangle
Four corners of chamber, the short side level of this four the second L-shaped nanometer metal bodies is relatively and long side is relative vertically, eight the second rectangles
Nanometer metal body is correspondingly arranged between the relative longer side and a shorter side of the second L-shaped nanometer metal body respectively, second rectangle nanometer
Spacing between spacing between metallic object and the second adjacent L-shaped nanometer metal body and the second adjacent rectangle nanometer metal body
It is 25nm.
Further preferably, the long edge size of the first described L-shaped nanometer metal body is 80nm*30nm*30nm, the first L-shaped
The short side dimension of nanometer metal body is 50nm*30nm*30nm, and the size of the first rectangle nanometer metal body is 100nm*30nm*
30nm, horizontally disposed first rectangle nanometer metal body is relative with the short side of corresponding first L-shaped nanometer metal body respectively, vertically
The the first rectangle nanometer metal body set is relative with the long side of corresponding first L-shaped nanometer metal body respectively.
Further preferably, the long edge size of the second described L-shaped nanometer metal body is 80nm*30nm*30nm, the second L-shaped
The short side dimension of nanometer metal body is 50nm*30nm*30nm, and the size of the second rectangle nanometer metal body is 305/3nm*30nm*
30nm, level is relative two-by-two respectively for horizontally disposed second rectangle nanometer metal body, this two-by-two the second relative rectangle of level receive
Rice metallic object is relative with the short side of corresponding second L-shaped nanometer metal body respectively, the second rectangle nanometer metal body being vertically arranged
It is vertical relative two-by-two respectively, this two-by-two vertical the second relative rectangle nanometer metal body respectively with corresponding second L-shaped nanogold
The long side for belonging to body is relative.
Further preferably, the first described L-shaped nanometer metal body, the first rectangle nanometer metal body, the second L-shaped nano metal
The material of body and the second rectangle nanometer metal body is silver.
Further preferably, described dielectric layer is MgF dielectric layers, and the size of the dielectric layer is 500nm*500nm*100nm.
The utility model has the advantages that compared with prior art：The utility model solves current near field antenna
Electromagnetic enhancement only acts on the limitation of extremely narrow regional extent, realizes uniform enhancing of the electromagnetic field in space.The utility model is set
Count thinking simple, integration is good, it is wide using scope, the near field optic day of different-waveband can be designed according to the characteristic of different materials
Line, the opto-electronic device for particularly designing optical communication wave band with semi-conducting material has prior practical value.
Brief description of the drawings
Fig. 1 is that toroidal magnetic field strengthens the dimensional structure diagram of near field optic antenna；
Fig. 2 is the dimensional structure diagram of the enhanced near field optic antenna of field homogeneity；
Fig. 3 is that toroidal magnetic field strengthens the planar structure schematic diagram of near field optic antenna；
Fig. 4 is the planar structure schematic diagram of the enhanced near field optic antenna of field homogeneity；
Fig. 5 is that toroidal magnetic field strengthens the Distribution of Magnetic Field figure of near field optic antenna；
Fig. 6 is the Distribution of Magnetic Field figure of the enhanced near field optic antenna of field homogeneity.
In figure：1st, dielectric layer, 2, metal structure, the 3, first L-shaped nanometer metal body, the 4, first rectangle nanometer metal body, 5,
Second L-shaped nanometer metal body, the 6, second rectangle nanometer metal body.
Embodiment
Particular content of the present utility model is described in detail with reference to accompanying drawing.MgF is chosen as dielectric layer, it is gold-plated on dielectric layer
Category silver, designs the near field optic antenna of structure as depicted in figs. 1 and 2 as follows respectively.
Step 1, selected work materials, determine material dielectric constant, select optical antenna structure type, determine that structure is joined
Number；
Step 2, using equivalent lc circuit method, obtain square-section metal local surface phasmon pattern；
There is step 3, the magnetic field-enhanced near field optic Back Word cavity of design, the cellular of the antenna periodically segmentation to rise and fall
There is periodic arrangement with inner and outer ring adjacent cells cellular；
Step 3.1, the structural parameters by changing rectangular metal body, its locally resonant frequency is adjusted to working frequency；
Step 3.2, the dislocation for changing rectangular metal body on rectangular inner cavity and rectangle exocoel so that it is anti-that interior exocoel can flow motion
Phase；
Step 3.3, the interior exocoel to center section or adjacent annular cellular carry out periodic modulation, make the ring-type cellular or
Neighbour's ring-type structure cell has periodic arrangement；
Step 4, using the time-domain finite integration method numerical simulation near field optic antenna it can flow motion process.
As shown in figure 1, the near field optic antenna includes dielectric layer 1 and the metal structure 2 being arranged on dielectric layer 1, the gold
It is that closed type returns font structure to belong to structure 2, and MgF dielectric layers are that thickness is the square dielectric layer that 100nm, the length of side are 500nm, closure
Formula returns the Zhou Changwei 316nm of font structure, and thickness is 30nm.
As shown in Fig. 2 the enhanced near field optic antenna of field homogeneity described in the utility model, including dielectric layer 1 and set
The metal structure 2 being placed on dielectric layer 1, described dielectric layer 1 is MgF dielectric layers, and the size of the dielectric layer 1 is 500nm*
500nm*100nm, described metal structure 2 is back font structure, and this time font structure includes discontinuous rectangular inner cavity and interruption
Spacing between formula rectangle exocoel, wherein discontinuous rectangular inner cavity and discontinuous rectangle exocoel is 35nm, described discontinuous square
Shape inner chamber is made up of four the first L-shaped nanometer metal bodies 3 and four the first rectangle nanometer metal bodies 4, wherein four the first L-shaped are received
Rice metallic object 3 constitutes four corners of discontinuous rectangular inner cavity, and the short side level of this four the first L-shaped nanometer metal bodies 4 is relative
And long side is relative vertically, it is relative that four the first rectangle nanometer metal bodies 4 are correspondingly arranged in the first L-shaped nanometer metal body 3 respectively
Between longer side and a shorter side, the spacing between the first rectangle nanometer metal body 4 first L-shaped nanometer metal body 3 adjacent with both sides
For 25nm, described discontinuous rectangle exocoel is by four the second L-shaped nanometer metal bodies 5 and eight the second rectangle nanometer metal bodies 6
Composition, wherein four the second L-shaped nanometer metal bodies 5 constitute four corners of discontinuous rectangle exocoel, four the second L-shaped nanometers
The short side level of metallic object 5 is relatively and long side is relative vertically, and eight the second rectangle nanometer metal bodies 6 are correspondingly arranged in second respectively
Between the relative longer side and a shorter side of L-shaped nanometer metal body 5, the second rectangle nanometer metal body 6 and the second adjacent L-shaped nanogold
The spacing belonged between the spacing and adjacent the second rectangle nanometer metal body 6 between body 5 is 25nm.
Further preferably, the long edge size of the first described L-shaped nanometer metal body 3 is 80nm*30nm*30nm, the first L-shaped
The short side dimension of nanometer metal body 3 is 50nm*30nm*30nm, and the size of the first rectangle nanometer metal body 4 is 100nm*30nm*
30nm, horizontally disposed first rectangle nanometer metal body 4 is relative with the short side of corresponding first L-shaped nanometer metal body 3 respectively, erects
The the first rectangle nanometer metal body 4 directly set is relative with the long side of corresponding first L-shaped nanometer metal body 3 respectively.
Further preferably, the long edge size of the second described L-shaped nanometer metal body 5 is 80nm*30nm*30nm, the second L-shaped
The short side dimension of nanometer metal body 5 is 50nm*30nm*30nm, and the size of the second rectangle nanometer metal body 6 is 305/3nm*
30nm*30nm, level is relative two-by-two respectively for horizontally disposed second rectangle nanometer metal body 6, this two-by-two level it is relative second
Rectangle nanometer metal body 6 is relative with the short side of corresponding second L-shaped nanometer metal body 5 respectively, and the second rectangle being vertically arranged is received
Rice metallic object 6 is vertical relative two-by-two respectively, this two-by-two vertical the second relative rectangle nanometer metal body 6 respectively with corresponding second
The long side of L-shaped nanometer metal body 5 is relative.
Motion process can be flowed using the time-domain finite integration method numerical simulation near field optic antenna, such as Fig. 5 and Fig. 6 institutes
Show, be respectively the Distribution of Magnetic Field figure of near field optic antenna when working frequency is 320.5THZ.According to the distribution situation of field, hair
Uniform enhancing is presented in existing Fig. 4 configuration, in annular chamber and spatial distribution is very flat, therefore setting for Fig. 4 can be selected
Meter form is used as the enhanced near field optic antenna designs schematic diagram of field homogeneity.
Embodiment above describes general principle of the present utility model, principal character and advantage, the technical staff of the industry
It should be appreciated that the utility model is not restricted to the described embodiments, the simply explanation described in above-described embodiment and specification is originally
The principle of utility model, in the case where not departing from the scope of the utility model principle, the utility model also has various changes and modifications,
These changes and improvements are each fallen within the range of the utility model protection.
Claims (5)
1. a kind of enhanced near field optic antenna of field homogeneity, including dielectric layer and the metal structure that is arranged on dielectric layer, its
It is characterised by：Described metal structure is back font structure, and this time font structure includes discontinuous rectangular inner cavity and discontinuous square
Spacing between shape exocoel, wherein discontinuous rectangular inner cavity and discontinuous rectangle exocoel is in 35nm, described discontinuous rectangle
Chamber is made up of four the first L-shaped nanometer metal bodies and four the first rectangle nanometer metal bodies, wherein four the first L-shaped nano metals
Body constitutes four corners of discontinuous rectangular inner cavity, and the short side level of this four the first L-shaped nanometer metal bodies is relatively and long side is erected
Straight relative, four the first rectangle nanometer metal bodies are correspondingly arranged in the relative longer side and a shorter side of the first L-shaped nanometer metal body respectively
Between, the spacing between the first rectangle nanometer metal body first L-shaped nanometer metal body adjacent with both sides is 25nm, described
Discontinuous rectangle exocoel is made up of four the second L-shaped nanometer metal bodies and eight the second rectangle nanometer metal bodies, wherein four
Two L-shaped nanometer metal bodies constitute four corners of discontinuous rectangle exocoel, the short side level of this four the second L-shaped nanometer metal bodies
Relative and long side is relative vertically, and it is relative that eight the second rectangle nanometer metal bodies are correspondingly arranged in the second L-shaped nanometer metal body respectively
Longer side and a shorter side between, spacing and phase between the second rectangle nanometer metal body and the second adjacent L-shaped nanometer metal body
Spacing between the second adjacent rectangle nanometer metal body is 25nm.
2. the enhanced near field optic antenna of field homogeneity according to claim 1, it is characterised in that：The first described L-shaped
The long edge size of nanometer metal body is 80nm*30nm*30nm, and the short side dimension of the first L-shaped nanometer metal body is 50nm*30nm*
30nm, the size of the first rectangle nanometer metal body is 100nm*30nm*30nm, horizontally disposed first rectangle nanometer metal body point
It is not relative with the short side of corresponding first L-shaped nanometer metal body, the first rectangle nanometer metal body being vertically arranged respectively with accordingly
The first L-shaped nanometer metal body long side it is relative.
3. the enhanced near field optic antenna of field homogeneity according to claim 1, it is characterised in that：The second described L-shaped
The long edge size of nanometer metal body is 80nm*30nm*30nm, and the short side dimension of the second L-shaped nanometer metal body is 50nm*30nm*
30nm, the size of the second rectangle nanometer metal body is 305/3nm*30nm*30nm, horizontally disposed second rectangle nanometer metal body
Level is relative two-by-two respectively, this two-by-two the second relative rectangle nanometer metal body of level respectively with corresponding second L-shaped nanogold
The short side for belonging to body is relative, and the second rectangle nanometer metal body being vertically arranged is vertical relative two-by-two respectively, and this is vertical relative two-by-two
Second rectangle nanometer metal body is relative with the long side of corresponding second L-shaped nanometer metal body respectively.
4. the enhanced near field optic antenna of field homogeneity according to claim 1, it is characterised in that：The first described L-shaped
Nanometer metal body, the first rectangle nanometer metal body, the material of the second L-shaped nanometer metal body and the second rectangle nanometer metal body are
Silver.
5. the enhanced near field optic antenna of field homogeneity according to claim 1, it is characterised in that：Described dielectric layer is
MgF dielectric layers, the size of the dielectric layer is 500nm*500nm*100nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720058641.1U CN206411337U (en) | 2017-01-18 | 2017-01-18 | A kind of enhanced near field optic antenna of field homogeneity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720058641.1U CN206411337U (en) | 2017-01-18 | 2017-01-18 | A kind of enhanced near field optic antenna of field homogeneity |
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| Publication Number | Publication Date |
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| CN206411337U true CN206411337U (en) | 2017-08-15 |
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|---|---|---|---|
| CN201720058641.1U Expired - Fee Related CN206411337U (en) | 2017-01-18 | 2017-01-18 | A kind of enhanced near field optic antenna of field homogeneity |
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| Country | Link |
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Granted publication date: 20170815 Termination date: 20200118 |
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