CN109196397B - For generating the device and system, fixed single-photon source method of single photon - Google Patents
For generating the device and system, fixed single-photon source method of single photon Download PDFInfo
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- CN109196397B CN109196397B CN201680086251.3A CN201680086251A CN109196397B CN 109196397 B CN109196397 B CN 109196397B CN 201680086251 A CN201680086251 A CN 201680086251A CN 109196397 B CN109196397 B CN 109196397B
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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
Abstract
A kind of device and system for generating single photon, fixed single-photon source method, which includes waveguide；Resonant cavity is located above the waveguide；Thermally sensitive polymeric, positioned at being provided with above the waveguide of the resonant cavity；Wherein, the thermally sensitive polymeric is hydrophily under conditions of being less than temperature threshold, is hydrophobicity under conditions of being not less than temperature threshold.The device architecture for being used to generate single photon is simple and easily fabricated, simplifies the manufacture craft of the device for generating single photon.
Description
Technical field
The present invention relates to quantum information equipment technical field, the more particularly, to device of generation single photon and system, solid
Order photon source method.
Background technique
Quantum information science is the product that quantum mechanics and information science technology combine, including quantum cryptography, quantum communications,
Quantum calculation, quantum measurement etc., in recent years, all have been achieved for important breakthrough theoretical and experimental.Either quantum communications
Or quantum calculation, stable, high-speed single-photon source is all the key equipment that must be solved.Single-photon source refers to same
Moment only emits the light source of a photon.
In the prior art, in order to generate single photon, usually by luminescent material indium arsenide (InAs) and aluminium indium arsenide
(AlGaAs) quantum dot is coupled into the approximate nano wire of lattice structure in growth.After being excited later to luminescent material,
, since luminescence generated by light phenomenon (Photoluminescence) generates spontaneous radiation, release is equal to the single light of bandgap energy for it
Subflow.These photons with specific light emission direction and shine due to being bound in the nano wire for being similar to optical waveguide
Field distribution.
In above scheme, InAs and AlGaAs Quantum Dots Growth is needed into higher level of processing and more multiple into nano wire
Miscellaneous manufacture craft.
Summary of the invention
The embodiment of the present invention provides a kind of for generating the device and system of single photon, and fixed single-photon source method,
For simplifying for generating the manufacture craft of the device of single photon, and single photon is generated by simple method.
In a first aspect, the embodiment of the present invention provide it is a kind of for generating the device of single photon, comprising: waveguide；Resonant cavity, position
Above the waveguide；Thermally sensitive polymeric, positioned at being provided with above the waveguide of the resonant cavity；Wherein, the temperature-sensitive is poly-
Closing object is hydrophily under conditions of being less than temperature threshold, is hydrophobicity under conditions of being not less than temperature threshold.It can be seen that the use
It is simple and easily fabricated in the device architecture for generating single photon, simplify the manufacture craft of the device for generating single photon.
Optionally, the resonant cavity is surface plasma resonant vibration chamber.In this way, can further improve the list in resonant cavity
The light intensity of photon.Optionally, the resonant cavity is made of two metalworks.In this way, can further improve in resonant cavity
The light intensity of single photon.Optionally, the resonant cavity is formed by following any form: by being located at two triangle metal parts
Two apex angles be separated by pre-determined distance and formed；It is separated by pre-determined distance by bimetal nano line to be formed；It is separated by by bimetal nano ball
Pre-determined distance is formed.In this way, on the one hand can preferably fix the single photon in resonant cavity, on the other hand also can be improved
The light intensity of single photon in resonant cavity.
Optionally, the device for generating single photon further includes antenna.Antenna is located above the waveguide, the temperature-sensitive is poly-
It closes below object；Wherein, the resonant cavity is located at the feed assembly of the antenna.In this way, in the device for generating single photon
Resonant cavity at generate single photon can at the feed assembly of antenna along specific direction propagate, to control well
The direction of generated single photon.Further, resonant cavity is placed at the feed assembly of antenna, is can be enhanced at resonant cavity
Generate when photon light intensity.The third aspect, since antenna to be placed in above waveguide, antenna can produce light obliquely
, which enters waveguide, so as to preferably make the single photon generated at resonant cavity be coupled into waveguide.Optionally, described
Antenna is yagi aerial.It so, it is possible preferably to control single photon towards specific direction propagation.
Second aspect, the embodiment of the present invention provide a kind of any for generating the device of single photon in embodiments of the present invention
The method of single-photon source is fixed in part, comprising: laser is irradiated at the resonant cavity on the device for generating single photon；Described
The surface of thermally sensitive polymeric flows into the liquid for carrying single-photon source；Wherein, the single photon in the liquid for carrying single-photon source
The dentate in source is hydrophobicity；Wherein, the laser is used for: being increased the temperature in the resonant cavity, is made the temperature-sensitive
Polymer is converted to hydrophobicity from hydrophily, and the liquid for carrying single-photon source is attracted to stay in the resonant cavity.It can
See this for generate single photon device architecture it is simple and easily fabricated, simplify the production of the device for generating single photon
Technique.
Optionally, the single-photon source in the liquid for carrying single-photon source is Colloidal Quantum Dots or dye molecule.In this way,
Single-photon source used in the one side embodiment of the present invention does not need harsh environment requirement, for example requires extremely low environment temperature
Degree etc., to simplify generation technique；On the other hand, the liquid for carrying single-photon source can be made to be mentioned in embodiments of the present invention
The upper surface of the device for generating single photon supplied is flowed, to successfully realize side provided by the embodiment of the present invention
Case.
Optionally, the difference between the local frequency of the resonant cavity and the local frequency of the single-photon source is less than resonance
Frequency threshold；The local frequency of also included antenna and the local oscillator of the single-photon source in the device for generating single photon
Difference between frequency is less than the resonant frequency threshold value.In this way, the local frequency of resonant cavity and the local frequency of single-photon source
It is closer to, therefore can resonate under the effect of the laser, to enhance single photon light intensity.And the local frequency and list of antenna
The local frequency of photon source is closer to, therefore can be resonated under the effect of the laser, to enhance single photon light intensity.
The third aspect, the embodiment of the present invention provide a kind of single photon generation system, including provided in an embodiment of the present invention
A kind of device being used to generate single photon, laser and liquid inflow device, in which: the laser is used for described
Laser is irradiated at the resonant cavity on device for generating single photon；The liquid inflow device is used in the thermally sensitive polymeric
Surface flow into carry single-photon source liquid；Wherein, the dentate of the single-photon source in the liquid for carrying single-photon source
For hydrophobicity；Wherein, the laser is used for: being increased the temperature in the resonant cavity, is made the thermally sensitive polymeric from parent
It is aqueous to be converted to hydrophobicity, and attract the liquid for carrying single-photon source to stay in the resonant cavity, and make to stay in institute
The liquid for stating the carrying single-photon source in resonant cavity issues single photon under the irradiation of the laser, and the single photon is by coupling
It is bonded to the waveguide internal transmission.
In the embodiment of the present invention, the device for generating single photon includes waveguide；Resonant cavity is located above the waveguide；
Thermally sensitive polymeric, positioned at being provided with above the waveguide of the resonant cavity；Wherein, the thermally sensitive polymeric is being less than temperature threshold
It is hydrophily under conditions of value, is hydrophobicity under conditions of being not less than temperature threshold.It can be seen that this is used to generate the device of single photon
Part structure is simple, and easily fabricated, simplifies the manufacture craft of the device for generating single photon.
Further, it when being used to generate the device generation single photon of single photon based on this, is used only in for generating single photon
Laser is irradiated at resonant cavity on the device in source；It is in the liquid that the surface of the thermally sensitive polymeric flows into carrying single-photon source
It can.Since the dentate of the single-photon source in the liquid for carrying single-photon source is hydrophobicity.Therefore it is irradiated at resonant cavity
Laser can be such that the temperature in the resonant cavity increases, and so that the thermally sensitive polymeric is converted to hydrophobicity from hydrophily, and inhale
Draw the liquid for carrying single-photon source to stay in the resonant cavity, and makes to stay in the carrying list in the resonant cavity
The liquid of photon source issues single photon under the irradiation of the laser, and the single photon is coupled to the waveguide internal transmission.
As it can be seen that generating single photon in the embodiment of the present invention by simple method, and realize the coupling of single photon and waveguide.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced.
Fig. 1 is provided in an embodiment of the present invention a kind of for generating the structural schematic diagram of the device of single photon；
Fig. 2 is the method and step schematic diagram provided in an embodiment of the present invention prepared for generating the device of single photon；
Fig. 3 is the method and step schematic diagram provided in an embodiment of the present invention prepared for generating the device of single photon；
Fig. 4 is the method and step schematic diagram provided in an embodiment of the present invention prepared for generating the device of single photon；
Fig. 5 is the method and step schematic diagram provided in an embodiment of the present invention prepared for generating the device of single photon；
Fig. 6 is the method and step schematic diagram provided in an embodiment of the present invention prepared for generating the device of single photon；
Fig. 7 is the schematic diagram of direction A in Fig. 6 provided in an embodiment of the present invention；
Fig. 8 is the side that single-photon source is fixed in a kind of device for generating single photon provided in an embodiment of the present invention
Method；
Fig. 9 is the structural schematic diagram that a kind of single photon provided in an embodiment of the present invention generates system；
Figure 10 is the schematic diagram of direction A in Fig. 9 provided in an embodiment of the present invention；
Figure 11 is the signal of light intensity of the single photon in resonant cavity and light intensity in free space in the embodiment of the present invention
Figure.
Specific embodiment
In order to which the purpose of the present invention, technical solution and beneficial effect is more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only used to explain this hair
It is bright, it is not intended to limit the present invention.
In specific implementation, in many fields, stable, high-speed single-photon source is all the key equipment that must be solved.
Specifically, it in quantum communications field, can be passed in personal space or optical fiber using the single photon of generation as quantum bit
Defeated, wherein the quality of single-photon light source has conclusive influence to key yield, photon degree of coherence etc..In quantum calculation
Field single or entangled photons linear actions can be used to carry out a large amount of concurrent operations, wherein can single-photon light source generate
The photon of " determining (on-demand, i.e., what non-probability generated) ", is one of the premise of quantum calculation success.In meterological
Aspect single photon can be used to carry out the super diffraction limit imaging of biological sample, wherein the brightness of single photon, the spies such as monochromaticjty
Sign also plays conclusive influence to image quality.In terms of infrastest, the bell inequality in quantum mechanics is verified, gravitation
Search of wave etc., single photon also play huge effect.
Based on above-mentioned poll, provided in the embodiment of the present invention a kind of for generating the device and system of single photon, Yi Jigu
Order photon source method for simplifying the manufacture craft for generating the device of single photon, and generates single by simple method
Photon.
Fig. 1 illustrates provided in an embodiment of the present invention a kind of for generating the structural representation of the device of single photon
Figure, as shown in Figure 1, this is used to generate the device of single photon, comprising: waveguide 102；Resonant cavity 103；Thermally sensitive polymeric 105.
Wherein, resonant cavity 103 is located above the waveguide；Thermally sensitive polymeric 105, which is located at, is provided with the resonant cavity 103
102 top of waveguide；Wherein, the thermally sensitive polymeric 105 is hydrophily under conditions of being less than temperature threshold, is being not less than
It is hydrophobicity under conditions of temperature threshold.Temperature threshold is a temperature value, can be determined according to specific operating environment.
Optionally, the resonant cavity is surface plasma resonant vibration chamber.Optionally, the resonant cavity is by two metalwork groups
At.Optionally, the resonant cavity is made of two nano metal parts.In this way, can further improve the monochromatic light in resonant cavity
The light intensity of son.
Optionally, the resonant cavity is formed by following any form: by be located at two triangle metal parts two
A apex angle is separated by pre-determined distance and is formed；It is separated by pre-determined distance by bimetal nano line to be formed；It is separated by by bimetal nano ball default
Distance is formed.Specifically, resonant cavity can be made of two components, and pre-determined distance, such as two three are separated by between two components
It is separated by pre-determined distance between two angular wedge angles, two components can form resonant cavity at this time, and for details, reference can be made to shown in Fig. 7
Resonant cavity 103.It is separated by pre-determined distance by the top of two bimetal nano lines for another example to be formed；For another example by bimetal nano
Ball is separated by pre-determined distance and is formed.In this way, on the one hand can preferably fix the single photon in resonant cavity, on the other hand
The light intensity for the single photon being located in resonant cavity can be improved.
In the embodiment of the present invention, under the action of thermally sensitive polymeric, single photon is generated at resonant cavity, and import in waveguide
Portion.It can be seen that the device architecture for being used to generate single photon is simple and easily fabricated, the device for generating single photon is simplified
Manufacture craft.
Optionally, in order to preferably control the direction of single photon, in the device for generating single photon further include: antenna,
Above the waveguide, below the thermally sensitive polymeric；Wherein, the resonant cavity is located at the feed assembly of the antenna,
Resonant cavity is used i.e. at the feed assembly of antenna, that is to say, that resonant cavity constitutes the feed assembly of antenna.In this way, with
The single photon generated at the resonant cavity of device for generating single photon can be at the feed assembly of antenna along specific direction
It propagates, thus the direction of single photon caused by controlling well.Further, resonant cavity is used at the feed assembly of antenna
The light intensity of the single photon generated at resonant cavity can be enhanced in structure.The third aspect, since antenna being placed in above waveguide,
Antenna can produce light field obliquely, which enters waveguide, so as to preferably make the single photon coupling generated at resonant cavity
It is incorporated into waveguide.
Optionally, antenna system can there are many, as long as can control single photon towards specific direction propagate, preferably
Ground, the antenna are yagi aerial.
Based on foregoing description, the embodiment of the present invention provides a kind of method for preparing the above-mentioned device for being used to generate single photon,
Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6 show the method and step schematic diagram for preparing the above-mentioned device for being used to generate single photon:
First, as shown in Fig. 2, first preparing substrate 101；
Second, one layer of waveguide 102 is prepared on substrate 101, as shown in Figure 3；
As shown in figure 4, making resonant cavity 103 in waveguide 102 optionally, complementary metal oxide half can be used in third
Conductor (Complementary Metal Oxide Semiconductor, abbreviation CMOS) technique prepares resonant cavity 103；
4th, optionally, as shown in figure 5, making antenna 104 above waveguide 102.Optionally, CMOS technology can be used
Prepare antenna 104.Resonant cavity 103 is located at the feed assembly of antenna 104.The feed of antenna 104 is replaced using resonant cavity 103
Component；
5th, one layer of thermally sensitive polymeric 105 is covered in body structure surface, as shown in Figure 6.The thermally sensitive polymeric is being less than temperature
It spends for hydrophily under conditions of threshold value, is hydrophobicity under conditions of being not less than temperature threshold.Specifically, thermally sensitive polymeric
105 there are many materials optionally, such as poly-N-isopropyl acrylamide (PNIPAM), the material is being higher than specific temperature (such as 32
DEG C) when hydrophobicity can be become from hydrophily.
Fig. 7 illustrates the schematic diagram of direction A in Fig. 6 provided in an embodiment of the present invention, as shown in fig. 7, resonant cavity
103 be a butterfly, i.e., is formed by being separated by pre-determined distance between two wedge angles of two triangle metal parts.Day shown in Fig. 7
Line is yagi aerial.
Based on above content, Fig. 8 illustrate the embodiment of the present invention also provide it is a kind of for generating single photon
The method that single-photon source is fixed in device, as shown in Figure 8, comprising:
Step 801, laser is irradiated at the resonant cavity on the device for generating single photon；
Step 802, the liquid of carrying single-photon source is flowed on the surface of thermally sensitive polymeric；Wherein, single-photon source is carried
The dentate of quantum dot in liquid is hydrophobicity；Wherein, laser is used for: being increased the temperature in resonant cavity, is made temperature-sensitive
Polymer is converted to hydrophobicity from hydrophily, and the liquid for carrying single-photon source is attracted to stay in resonant cavity.
As it can be seen that through the above steps 801 and step 802 single-photon source can be fixed at resonant cavity, solve existing
Technology can not fix the problem of single-photon source, and then the direction for control single photon provides the foundation.
Optionally, the difference between the local frequency of the antenna and the local frequency of the single-photon source is less than resonance frequency
Rate threshold value, in this way, the local frequency of antenna and the local frequency of single-photon source are closer to, therefore can shine in single-photon source
In the case of resonate, to unidirectionally guide single photon emission.Optionally, the local frequency of the resonant cavity and the single photon
Difference between the local frequency in source is less than resonant frequency threshold value.In this way, the local frequency of resonant cavity and the local oscillator of single-photon source
Frequency is closer to, therefore can be resonated under the effect of the laser, to enhance single photon light intensity.
In the embodiment of the present invention, a method of the material for being used to determine resonant cavity and antenna optionally are as follows: according to list
Wave band locating for photon source determines resonant cavity and antenna material.For example, the wave band when laser is in visible light near infrared range
When interior, then gold, silver, the materials such as copper or aluminium can be used in resonant cavity and antenna.It is humorous when the wave band of laser is in middle infrared band
Shake chamber and the antenna semiconductor that also height in hand adulterates.Optionally, the material of resonant cavity and antenna may be the same or different.It is selecting
When selecting the material of resonant cavity and antenna, resonant cavity, antenna and single-photon source is set to generate resonance as far as possible, even if resonant cavity, day
Line is identical with the local frequency for the single photon that single-photon source issues, so as to enhance the light intensity of single photon.It optionally, can be by changing
The size of line of restoring a reactionary rule changes the local frequency of antenna.
Optionally, further, at using laser irradiation resonant cavity, to make to stay in the carrying in the resonant cavity
Single-photon source in the liquid of single-photon source issues single photon under the irradiation of the laser, and the single photon is coupled to described
Waveguide internal transmission.
Optionally, the single-photon source in the liquid for carrying single-photon source is Colloidal Quantum Dots or dye molecule.Or
The single-photon source carried in the liquid of single-photon source is the single-photon source synthesized by other chemical means.Optionally, the glue
Body quantum dot is II-VI group quantum dot, such as cadmium selenide (CdSe), zinc sulphide (ZnS) etc..In the liquid for carrying single-photon source
Single-photon source is not limited only to II-VI group quantum dot, can also be other semiconductor-quantum-points.In this way, on the one hand the present invention is implemented
Single-photon source used in example does not need harsh environment requirement, for example requires extremely low environment temperature etc., to simplify
Generation technique；On the other hand, the liquid for carrying single-photon source can be made provided for generating list in embodiments of the present invention
The upper surface of the device of photon is flowed, to successfully realize scheme provided by the embodiment of the present invention.
In specific implementation, when single-photon source is semiconductor-quantum-point, since semiconductor quantum spot size is minimum, diameter is several
Nanometer (nm) is to more than ten of nm, and the wave function of bound electron causes it to have discrete energy in quantum dot on three-dimensional
Grade, therefore semiconductor-quantum-point is used as generating the two-level system for being similar to atom.Use the pumping with appropriate wavelength
Electronics in photo-excited semiconductor quantum dot can make it transit to high level from low-lying level.When electronics returns to low-lying level, meeting
Release the photon of a fixed energies.Therefore, such semiconductor-quantum-point can be used as " certainty " single-photon source, if that is, according to
Pumping pulse is penetrated, single photon will be released.
In the embodiment of the present invention, the dentate for the single-photon source for including in the liquid for carrying single-photon source can be carried out flexible
Change, for example set hydrophobicity for the dentate of the single-photon source in the liquid for carrying single-photon source.
Based on same design, Fig. 9 illustrates a kind of structural schematic diagram of single photon generation system, as shown in figure 9,
The system includes the device for generating single photon, laser 110 and liquid inflow device 111, in which:
The laser 110, which is used to irradiate at the resonant cavity 103 on the device for generating single photon, swashs 109
Light；The liquid inflow device 111 is used for the surface in the thermally sensitive polymeric 105 and flows into the liquid 106 for carrying single-photon source；
Wherein, the dentate of the single-photon source 107 in the liquid 106 for carrying single-photon source is hydrophobicity；Wherein, the laser
109 are used for: increasing the temperature in the resonant cavity 103, make the thermally sensitive polymeric in laser in irradiation area
Hydrophobicity is converted to from hydrophily, and the liquid 106 for carrying single-photon source is attracted to stay in the resonant cavity 103.
Optionally, thermally sensitive polymeric be excited change property include but is not limited to hydrophily, chemical bond etc. physically or chemically
Property.That is, thermally sensitive polymeric under the variation of temperature, can become hydrophobicity from hydrophily.Thermally sensitive polymeric can also have other
It is changeable physically or chemically etc..As long as single-photon source can be adsorbed after the change of thermally sensitive polymeric property, and property
Matter cannot adsorb single-photon source before changing.
Further, optionally, when needing using described for generating the device generation single photon of single photon, utilisable energy is big
It is fixed on the single-photon source at the resonant cavity center in the laser irradiation of photon source bandgap energy, it is made to emit single photon, it is described
Single photon is coupled to the waveguide internal transmission.
Figure 10 illustrates the schematic diagram of direction A in Fig. 9 in the embodiment of the present invention, below with reference to Fig. 9 and Figure 10 into
The detailed description of row.
As shown in figure 9, irradiating 103 top of resonant cavity with the laser 109 that laser 110 issues, as shown in Figure 10, laser shines
It penetrates area 106 and covers resonant cavity 103.Later, the liquid 106 for carrying single-photon source is carried in liquid inflow device 111, by liquid
The liquid 106 of the carrying single-photon source carried in inflow device 111 pours into the device for generating single photon, specific next
It says, pours into the surface of the thermally sensitive polymeric 105.Optionally, the liquid for carrying single-photon source is poured into from the left side of resonant cavity 103
106, flow through the liquid 106 for carrying single-photon source entire entire for generating the upper surface of the device of single photon, and part from
It flows out again on right side.It is alternatively possible to make the liquid of carrying single-photon source flowed out from the upper surface of the device for generating single photon
Body 106 flows into a recycling bin, for being recycled again.
Optionally, resonant cavity is surface plasma resonant vibration chamber, due to the plasma resonance of plasma surface, resonant cavity
The tip of nano metal can generate local humidification.Electrons in the single-photon source being placed in one generate Purcell, Edward Mills effect
(Purcell effect) effect (i.e. electronics will be greatly reduced in the relaxation time of height energy level transition), further enhances list
The brightness of photon source.
Optionally, laser 109 is radiated at the top of resonant cavity 103.As shown in Figure 10, when laser 109 is radiated at resonant cavity
When 103, the center of resonant cavity 103 can be such that temperature increases within the scope of little space due to the local enhancing of electric field, so as to cause
Thermally sensitive polymeric 105 in resonant cavity 103 is converted to hydrophobicity from hydrophily.Since the dentate of single-photon source is also hydrophobic
Property, when the liquid 106 for carrying single-photon source flows through resonant cavity 103, the single-photon source of the inside can be attracted to resonant cavity 103
In.Thermally sensitive polymeric 105 since laser heated perimeter is minimum, and except laser irradiation area 106 is still hydrophily, therefore
The liquid for flowing through the carrying single-photon source of hydrophilic thermally sensitive polymeric is flowed along the upper surface of the device for generating single photon
It walks.Optionally, laser irradiation range is smaller, and resonant cavity is also smaller, and the quantity for the single photon being attracted in resonant cavity can
It is one.As it can be seen that scheme provided by through the embodiment of the present invention, accurately controls the position of single-photon source, that is, is consolidated
Due in resonant cavity.
Further, in the embodiment of the present invention, optionally, fixed single-photon source is located at antenna in resonant cavity resonant cavity
At feed assembly, under laser irradiation, single-photon source can generate single photon, and single photon is under the action of antenna, along specific
Direction is propagated, to achieve the purpose that control the single photon direction of propagation, as shown in Figure 10, single photon 108 can be along antenna
It propagates on right side.
Further, due to the refractive index of the projecting medium of the refractive index of waveguide 102, the list that is generated from resonant cavity
Photon can be tied in the higher waveguide 102 of refractive index, to realize the coupling of single photon and waveguide.
In the embodiment of the present invention, the device architecture for being used to generate single photon is simple and easily fabricated, simplifies for giving birth to
At the manufacture craft of the device of single photon.
Second, single-photon source can be fixed at resonant cavity by the device for being used to generate single photon, realize fixation
The purpose of single photon.
Third is greater than the laser irradiation single-photon source of single-photon source bandgap energy using energy, due to the Po Sai of resonant cavity
Ear effect (Purcell effect), further enhances the light intensity of single-photon source.Figure 11 illustrates implementation of the present invention
The schematic diagram of light intensity of the single photon in resonant cavity and light intensity in free space in example, as shown in figure 11, in swashing for laser
In the case that hair intensity is certain, light intensity of the single photon in resonant cavity is far longer than the light intensity of the single photon in free space.
4th, under the action of antenna, transmits single photon caused by single-photon source along specific direction, reach
The purpose in fixed single photon direction.
5th, single photon successfully can be coupled into wave by the provided device for generating single photon of the embodiment of the present invention
It leads.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.Obviously, those skilled in the art can be to the present invention
Carry out various modification and variations without departing from the spirit and scope of the present invention.If in this way, these modifications and changes of the present invention
Within the scope of the claims of the present invention and its equivalent technology, then the invention is also intended to include these modification and variations to exist
It is interior.
Claims (10)
1. a kind of for generating the device of single photon characterized by comprising
Waveguide；
Resonant cavity, is located above the waveguide, and the resonant cavity is irradiated with a laser；
Thermally sensitive polymeric, positioned at being provided with above the waveguide of the resonant cavity, the surface of the thermally sensitive polymeric is flowed into
Carry the liquid of single-photon source；Wherein, the thermally sensitive polymeric is hydrophily under conditions of being less than temperature threshold, is being not less than
It is hydrophobicity under conditions of temperature threshold.
2. as described in claim 1 for generating the device of single photon, which is characterized in that further include:
Antenna is located above the waveguide, below the thermally sensitive polymeric；Wherein, the resonant cavity is located at the feedback of the antenna
At electrical component.
3. as claimed in claim 2 for generating the device of single photon, which is characterized in that the antenna is yagi aerial.
4. the device for being used to generate single photon as described in claims 1 to 3 any claim, which is characterized in that described humorous
Vibration chamber is surface plasma resonant vibration chamber.
5. the device for being used to generate single photon as described in claims 1 to 3 any claim, which is characterized in that described humorous
Vibration chamber is made of two metalworks.
6. the device for being used to generate single photon as described in claims 1 to 3 any claim, which is characterized in that described humorous
Vibration chamber is formed by following any form:
Two apex angles by being located at two triangle metal parts are separated by pre-determined distance and are formed；It is separated by by bimetal nano line pre-
If apart from formation；It is separated by pre-determined distance by bimetal nano ball to be formed.
7. a kind of based on fixing monochromatic light in the device for generating single photon described in claim 1~6 any claim
The method of component characterized by comprising
Laser is irradiated at resonant cavity on the device for generating single photon；
The liquid for carrying single-photon source is flowed on the surface of the thermally sensitive polymeric；Wherein, the liquid for carrying single-photon source
In single-photon source dentate be hydrophobicity；
Wherein, the laser is used for: being increased the temperature in the resonant cavity, is turned the thermally sensitive polymeric from hydrophily
It is changed to hydrophobicity, and the liquid for carrying single-photon source is attracted to stay in the resonant cavity.
8. the method for claim 7, which is characterized in that the single-photon source in the liquid for carrying single-photon source is glue
Body quantum dot or dye molecule.
9. the method for claim 7, which is characterized in that the sheet of the local frequency of the resonant cavity and the single-photon source
Difference between vibration frequency is less than resonant frequency threshold value；
The local frequency of also included antenna and the local frequency of the single-photon source in the device for generating single photon
Between difference be less than the resonant frequency threshold value.
10. a kind of single photon generates system, which is characterized in that including being used for as described in claim 1~6 any claim
Generate the device of single photon, laser and liquid inflow device, in which:
The laser is used to irradiate laser at the resonant cavity on the device for generating single photon；
The liquid inflow device is used for the surface in the thermally sensitive polymeric and flows into the liquid for carrying single-photon source；
Wherein, the dentate of the single-photon source in the liquid for carrying single-photon source is hydrophobicity；
Wherein, the laser is used for: being increased the temperature in the resonant cavity, is turned the thermally sensitive polymeric from hydrophily
It is changed to hydrophobicity, and attracts the liquid for carrying single-photon source to stay in the resonant cavity, and make to stay in the resonance
The liquid of the intracavitary carrying single-photon source issues single photon under the irradiation of the laser, and the single photon is coupled to institute
State waveguide internal transmission.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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