CN207896263U - Regulate and control the mushroom nano-antenna of multiple random irrelevant emitter radiation - Google Patents
Regulate and control the mushroom nano-antenna of multiple random irrelevant emitter radiation Download PDFInfo
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- CN207896263U CN207896263U CN201720905919.4U CN201720905919U CN207896263U CN 207896263 U CN207896263 U CN 207896263U CN 201720905919 U CN201720905919 U CN 201720905919U CN 207896263 U CN207896263 U CN 207896263U
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Abstract
The utility model discloses the mushroom nano-antennas for regulating and controlling multiple random irrelevant emitter radiation, including：Environmental matrices, substrate and mushroom nano-antenna/array；Wherein mushroom nano-antenna includes antenna cap, antenna stem and the emitter for depending on antenna stem；The size of the cap and stem, material can all be separated and be designed, and corresponding resonance band can carry out flexible modulation, can meet the stoke shift of different emitters；Wherein the resonance band of stem is coupled with the excitation frequency range of emitter, generates the enhancing of electromagnetic field local to enhance the excitation intensity of emitter；The resonance band of cap couples emissive porwer and regulation and control radiation directivity to enhance emitter with the transmitting frequency range of emitter, improves light Collection utilization efficiency.In addition, the structure arranges no dependence to the polarization of emitter, multiple irrelevant emitters can be regulated and controled.
Description
Technical field
The utility model is related to micro-nano unimolecule precision sensing, micro-nano single-photon sources（single-photon source）With
The related fields such as high-resolution imaging, in particular to the multiple random irrelevant emitter radiation intensity of regulation and control and directionality
Mushroom nano-antenna.
Background technology
The substance of unimolecule or atomic scale is detected, the hot spot of modern science research is not only, while being also not
Come high-precision sensing, the inexorable trend of the fields such as high-resolution imaging development.Usually only due to the size of individual molecule and atom
There is several nanometers even smaller, traditional means are difficult direct detection.Emitter（single-photon emitter）It is
One kind can generate unifrequency or monochromatic photon source after being excited by outside energy.The size of emitter itself
It is close with molecule, atom, can be to be tracked and detected most to individual molecule, atom with the substance useful effect of the scale
One of reliable means.Meanwhile some emitters（Especially organic fluorescence molecule and quantum dot）Surface chemistries
Matter can be handled specifically, can be directed to target molecule, atom is selectively marked（selective-
labeling）, with good stability and Modulatory character.However in practical applications, the radiation of emitter itself
Intensity is very faint, while its polar alignment is uncontrolled, and radiation does not have directionality generally.Existing many technical solutions are to use
Change nano-antenna material, or change single-photon source device architecture to study and be applied to the field, but for upper
Problem is stated, current technology scheme is difficult to overcome.
Nano-antenna is the technology using the transmission intensity and directionality of the resonance effect regulation and control light of sub-wavelength nanostructure.
On the one hand, nano-antenna can utilize the materials such as surface phasmon and high refractive index dielectric in the excitation of emitter
Frequency range generates resonance, provides superpower optical near-field to enhance its excitation intensity；On the other hand, nano-antenna can be with single photon
The transmitting frequency range of transmitter couples, and changes the directionality and angular spread of its radiation, improves the Collection utilization rate of light.By above
Both sides gain, nano-antenna can make emitter can be by light under picomole even femtomole concentration
Electric explorer detects, and truly realizes the detection to individual molecule, atom.However the nano-antenna being currently known is usually only
Humidification is arranged with to a certain particular polarization of emitter, it can not be to the not phase of multiple random alignments in actual conditions
Dry emitter carries out Effective Regulation.Therefore some investigators carry out Improvement, example to the structure of nano-antenna
Such as, the fourth day of Beijing University of Post ＆ Telecommunication was delivered on January 7th, 2014《Single-photon source performance study based on optical antenna》Document
In disclose first theoretical research carried out to single-photon source and optical antenna, then devise a kind of novel fan bar optics day
Line, and analog simulation is carried out to fan spike antenna using using Finite-Difference Time-Domain Method, discuss the Pu Saier effects of fan spike antenna.
Emulation finally is simulated to a kind of metal-dielectric Yagi spark gap nano-antenna, while realizing very high radiation decrement enhancing
And directionality.But simultaneously, tens to hundreds of are usually present between the excitation frequency range of emitter and transmitting frequency range to receive
The stoke shift of rice（Stoke-shift）, simple nano-antenna design is it is difficult to while enhance its excitation intensity and transmitting by force
Degree, and complicated nanometer day structure requires height, preparation difficulty big epitaxial device.The antenna structure designed in the document can not
Above-mentioned technical problem is realized and overcome well, and therefore, design is a kind of to be prepared simple and can meet emitter stoke
The nano-antenna of displacement is realized the regulation and control of the radiation intensity and directionality to multiple random irrelevant emitters, is had
Important meaning.
Utility model content
The purpose of the utility model is to overcome above-mentioned deficiency in the prior art, provide it is a kind of can regulation and control it is multiple it is random not
The mushroom nano-antenna of relevant emitter radiation intensity and directionality, the antenna structure disclosure satisfy that different single photons
The stoke shift of transmitter（Stoke-shift）, and it is simple in structure, convenient for preparing；The structure can be widely applied to micro-nano list
Molecular precision senses, the related fields such as micro-nano single-photon source and high-resolution imaging.
To achieve the above object, the utility model is as follows using technical solution：
Regulate and control the mushroom nano-antenna of multiple random irrelevant emitter radiation, it is characterised in that：Including substrate
It is set to the mushroom nano-antenna on substrate with several, the mushroom nano-antenna includes antenna stem and antenna bacterium
Lid, antenna stem are fixed on substrate, and antenna cap is fixed on the top of antenna stem in umbrella；The side of the antenna stem
Several emitters are depended on.
Surface phasmon metal or high refractivity dielectric substance may be used in the mushroom nano-antenna material,
Or two kinds of material mixing, but it is also not necessarily limited to both materials.Wherein, Au or Ag may be used in surface phasmon metal, or
Cu or Al etc.）；Si or GaAs or GaP or Ge or TiO may be used in high refractivity dielectric substance2Deng.The antenna bacterium
Lid, antenna stem can use the combination of same material or unlike material, the resonance band of antenna cap and antenna stem it is humorous
Frequency range of shaking can separate flexible design and regulation and control, disclosure satisfy that the stoke shift of different emitters（Stoke-
shift）；When the material of antenna cap and antenna stem is all made of the loss-free material of transmitting frequency range in emitter
When, it can effectively improve the quantum efficiency of emitter.
The mushroom nano-antenna is arranged independent of the polarization of emitter.Several described single photon emissions
The radiation energy of device totality is partial to the antenna cap direction of high refractivity.
The resonance band of the antenna cap is coupled with the transmitting frequency range of emitter, using Purcell effects come
Enhance the emissive porwer of emitter, while the antenna cap direction of high refractive index is partial in directing radiation direction, improves
Light Collection utilization efficiency.
The resonance band of the antenna stem is coupled with the excitation frequency range of emitter, near antenna stem surface
The enhancing of electromagnetic field local is generated to enhance the excitation intensity for the emitter for being attached to antenna stem.
The emitter can be luminescent organic molecule or atom or quantum dot etc., but be not limited to these types.
The mode that the emitter depends on antenna stem side can be ligand connection, can also be optical force
It depends on or chemistry depends on, but be limited to these types and depend on mode.
The mushroom nano-antenna is placed in environmental matrices, and the environmental matrices is refractive index than mushroom nanometer day
The material of the low 2-4 of line refractive index can be air or water or PMMA organic solutions etc..
The substrate using material refractive index and environmental matrices refractive index ± 0.5 within, while with nanometer day
Refractive index ± 3 ~ 4 of line, to reduce the influence that substrate itself radiates emitter.The substrate material is using packet
It includes but is not limited to SiO2Or Si or organic resin etc..
The utility model proposes mushroom nano-antenna structures by separately designing the size of cap and stem and choosing conjunction
Suitable material can couple the excitation frequency range and transmitting frequency range of emitter, greatly enhance emitter simultaneously
Radiation intensity.It is partial to cap direction using the refractive index difference directing radiation direction between cap and surrounding medium simultaneously,
Improve light Collection utilization efficiency.The structure is arranged independent of the polarization of emitter, can realize to it is multiple it is random not
The regulation and control of the radiation intensity and directionality of relevant emitter.
The beneficial effects of the utility model are as follows：
1, by separately designing the size of cap and stem and choosing suitable material, single photon emission can be coupled simultaneously
The excitation frequency range and transmitting frequency range of device, meet the stoke shift of different emitters（Stoke-shift）；
2, it is coupled with the excitation frequency range of emitter using the resonance effect of antenna stem, is produced near stem surface
Raw electromagnetic field local enhancing, the excitation intensity of the emitter of stem is attached to enhancing；
3, it is coupled with the transmitting frequency range of emitter using the resonance effect of antenna cap, utilizes Purcell effects
Enhance the emissive porwer of emitter, while the cap direction of high refractive index is partial in directing radiation direction, improve light
Collection utilization efficiency.
4, it arranges, can be realized to multiple random irrelevant emitters independent of the polarization of emitter
Radiation intensity and directionality regulation and control.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the Spectral Extinction cross-sectional sizes of the mushroom nano-antenna of the utility model（Extinction Cross-
Section）Schematic diagram.
Fig. 3 is that the utility model is attached to all irrelevant of stem surface 10nm distances for what is obtained in embodiment 1
The overall radiation directional diagram of quantum dot and relative to the radiation intensification factor in the case of no nano-antenna（Emitter
enhancement）Schematic diagram.
Wherein, reference numeral is：1 is environmental matrices；2 be substrate；3 be mushroom nano-antenna；4 be antenna cap；5 are
Antenna stem；6 be the emitter for depending on stem.
Specific implementation mode
To make the content, technical solution and advantage of the utility model be more clearly understood, below in conjunction with the accompanying drawings to this practicality
Novel specific implementation mode elaborates.It should be noted that the feature in the utility model embodiment can appoint mutually
Meaning combination.
Embodiment 1
Hydridization mushroom nano-antenna structure based on high refractive index dielectric Si and surface phasmon metal Au.Such as figure
Shown in 1, wherein：1 is air matrix；2 be SiO2Substrate；3 be hydridization mushroom nano-antenna；4 be Si material caps；5 be Au
Material stem；6 be the InP quantum dots that intrinsic quantum efficiency is 1.Multiple incoherent InP quantum dots of random arrangement depend on Au
At the 10nm of stem surface.
As shown in Fig. 2, this hydridization mushroom nano-antenna and air matrix have prodigious refractive index difference, can generate
Multiple strong resonant modes can be used in coupling with the excitation wave band and emission band of InP quantum dots, enhance its radiation intensity.
In this embodiment, it is 540nm, the InP quantum point design hydridization mushroom nanometers day of launch wavelength 600nm for excitation wavelength
Line.This hydridization mushroom nano-antenna under 540nm excitation wavelengths can Au stems surface generate electromagnetic field local enhancing with
Enhance the excitation intensity of InP quantum dots, enhancement factor is more than 8 times.
The overall radiation side of Fig. 3 is that is be calculated be attached to all irrelevant quantum dots of Au stems surface 10nm distances
To figure and relative to the radiation intensification factor in the case of no nano-antenna（Emission enhancement）.As can be seen that miscellaneous
Change mushroom nano-antenna effectively guides the most of of multiple irrelevant InP quantum dots and radiates the cap sides Si for prolonging high refractive index
To propagation, photon collection efficiency is substantially improved, directional emission enhancement factor is close to 25 times.In air matrix, towards bacterium
The light that lid direction is propagated all can be by numerical aperture NA（Numerical Aperture）>1 charge-coupled device camera
（Charge-coupled device camera）It is collected into.
Above example is only the preferred case of the utility model, and the interest field that the utility model is advocated is not limited to
These embodiments, modification, the deformation of any spirit and scope for not departing from the utility model should all belong to the guarantor of the utility model
Protect range.
Claims (9)
1. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control, it is characterised in that：Including substrate（2）
It is set to substrate with several（2）On mushroom nano-antenna（3）, the mushroom nano-antenna（3）Including antenna stem
（5）With antenna cap（4）, antenna stem（5）It is fixed on substrate（2）On, antenna cap（4）It is fixed on antenna stem in umbrella
（5）Top；The antenna stem（5）Side depended on several emitters（6）.
2. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 1,
It is characterized in that：The mushroom nano-antenna（3）Material uses surface phasmon metal or high refractivity dielectric substance,
Or two kinds of material mixing.
3. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 2,
It is characterized in that：The mushroom nano-antenna（3）Using Au or Ag or Cu or Al；Or Si or GaAs or GaP is used,
Or Ge or TiO2。
4. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 2 or 3,
It is characterized in that：The antenna cap（4）, antenna stem（5）Same material is used, or uses unlike material.
5. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 1,
It is characterized in that：The emitter（6）Radiation direction be partial to antenna cap（4）Direction.
6. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 1,
It is characterized in that：The emitter（6）It is luminescent organic molecule or atom or quantum dot.
7. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 1,
It is characterized in that：The emitter（6）Depend on antenna stem（5）The mode of side is ligand connection or optics
Power depends on or chemistry depends on.
8. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 1,
It is characterized in that：The mushroom nano-antenna（3）It is placed in environmental matrices（1）In, the environmental matrices（1）Compare mushroom for refractive index
Mushroom shape nano-antenna（3）The low 2-4 of refractive index material；The environmental matrices（1）It is organic for air or water or PMMA
Solution.
9. the mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control according to claim 1,
It is characterized in that：The substrate（2）Within the refractive index of material and refractive index ± 0.5 of environmental matrices, at the same with receive
Refractive index ± 3 ~ 4 of rice antenna；The substrate（2）Material is using including but not limited to SiO2Or Si or organic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720905919.4U CN207896263U (en) | 2017-07-25 | 2017-07-25 | Regulate and control the mushroom nano-antenna of multiple random irrelevant emitter radiation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720905919.4U CN207896263U (en) | 2017-07-25 | 2017-07-25 | Regulate and control the mushroom nano-antenna of multiple random irrelevant emitter radiation |
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| Publication Number | Publication Date |
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| CN207896263U true CN207896263U (en) | 2018-09-21 |
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| CN201720905919.4U Expired - Fee Related CN207896263U (en) | 2017-07-25 | 2017-07-25 | Regulate and control the mushroom nano-antenna of multiple random irrelevant emitter radiation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293846A (en) * | 2017-07-25 | 2017-10-24 | 中国工程物理研究院电子工程研究所 | The mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control |
-
2017
- 2017-07-25 CN CN201720905919.4U patent/CN207896263U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107293846A (en) * | 2017-07-25 | 2017-10-24 | 中国工程物理研究院电子工程研究所 | The mushroom nano-antenna of the multiple random irrelevant emitter radiation of regulation and control |
| CN107293846B (en) * | 2017-07-25 | 2023-06-13 | 中国工程物理研究院电子工程研究所 | Mushroom-shaped nano-antenna for regulating and controlling radiation of multiple random incoherent single photon emitters |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180921 Termination date: 20190725 |