CN109916872A - A kind of solid defects colour center polarizability detection system and method - Google Patents
A kind of solid defects colour center polarizability detection system and method Download PDFInfo
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Abstract
The invention discloses a kind of solid defects colour center polarizability detection system and methods.One embodiment of the present of invention uses the diamond for including high concentration NV colour center as sensing element, sample is manipulated, the polarization for realizing electron spin, by optical polarization pulse and optimal pulse spin projection detection method, to realize the measurement of polarizability.Compared to the methods of the fluorescence intensity of detection spin correlation, the detection of singlet infrared absorption and current detecting, the invention proposes the methods of a kind of electronic polarization of precise measurement solid defects colour center and optical pumping rate, signal-to-noise ratio is greatly improved, relaxation time substantially shortens, there is important application value for magnetic field measurement system aspect of performance of the analysis based on quantum principles, will serve in the engineering practices such as sensing measurement and control feedback.
Description
Technical field
The present invention relates to the polarization of quantum calculation, quantum Technology of Precision Measurement field more particularly to a kind of solid defects colour center
Rate detection system and method.
Background technique
As solid spin system, NV colour center is considered as a kind of up-and-coming quantum sensor, quantum sensing and
There is very big application potential in terms of quantum calculation.In order to realize relevant quantum application, need to carry out the manipulation of Quantum Spin
And detection.At present it is main spin detection method be detect spin correlation fluorescence intensity, there are also singlet infrared absorption detection and
Electric current detecting method.The above method concentrates on the opposite variation of operation after-polarization rate value, it show polarizability be in maximum value with
Some position or variable quantity between minimum value.However, specific polarizability is how many, cannot be obtained by these methods
The occurrence of polarizability.The value has important application value in terms of analyzing system performance, therefore measures the true of polarizability
Value is of great significance.
Summary of the invention
The technical problem to be solved in the present invention are as follows: the polarizability of accurate really measurement solid defects colour center realizes detection noise
Than being promoted.
According to one embodiment of present invention, the polarizability detection system and method for a kind of solid defects colour center are provided,
Include:
A kind of polarizability detection system of solid defects colour center, device are first as sensitivity using solid defects colour center is included
Part, a feature embodiments are diamond nitrogen-vacancy colour center material, manipulate to sample, realize the polarization of electron spin.It is logical
The light intensity for crossing change detection light (using 532nm laser for feature embodiments diamond nitrogen-vacancy system) obtains fluorescence data,
Data analysis is carried out to this group of data, feature embodiments are regression fit analysis, and then obtain the match value of polarizability.Detection system
System include excitation laser occur part, detection laser beam-generating section point, fluorescence detection optical path part, sample and its manipulate part and believe
Number acquisition and data processing section.
Part occurs for the excitation laser, including light source 1, the first photoswitch 2, the first wave plate of λ/2 3, plane mirror 4, the
The 8, first dichroscope 12 of one polarization beam apparatus (PBS), wherein light source 1 can be used but be not limited to 532nm laser, and the first light is opened
Closing 2 can be used but be not limited to acousto-optic modulator (AOM), and light source 1 generates continuous laser, and the first photoswitch 2 is in impulse generator 17
Control under realize and from continuous light input the conversion to pulse light output, become polarised light by the first wave plate of λ/2 3 and pass through polarization
The light intensity of the adjusting subsequent optical path of beam splitter (PBS) 8.The detection laser beam-generating section point, including detection light source 5, the second light are opened
The 6, the 2nd wave plate of λ/2 7, polarization beam apparatus (PBS) 8, dichroscope 12 are closed, wherein detection light source 5 can be used but be not limited to 532nm
Laser, the second photoswitch 6 can be used but be not limited to acousto-optic modulator (AOM), and detection light source 5 generates continuous laser, the second light
Switch 6, which is realized from continuous light, inputs the conversion to pulse light output, and polarization beam apparatus (PBS) 8 generates the detection light of power adjustable,
Second photoswitch 6 makes continuously survey light and input under the control of impulse generator 17 to become pulse microwave output；
The fluorescence detection optical path part, including photoelectric sensitive device 9, low-pass filter 10, baffle 11, two with holes
To Look mirror 12, object lens 13, wherein sensing element can be used but be not limited to avalanche photodide (APD), the fluorescence that sample issues
It is filtered through dichroscope 12 by the low-pass filtered device 10 of baffle of porous baffle 11 and is received by photoelectric sensitive device 9；
The sample manipulates part, including diamond sample 14, specimen holder 15, field generator for magnetic with it, wherein sample
Product frame 15 can be used but be not limited to printed circuit board, and diamond sample 14 is placed on specimen holder 15, and field generator for magnetic provides
The magnetic field needed in experimentation；
The signal acquisition and data processing section includes phosphor collection part and data processing section, and wherein fluorescence is received
The subsequent processing of electric signal is realized using master controller 16 for realizing phosphor collection, data processing section in collection part.
The polarizability detection system of the solid defects colour center, the impulse generator 17 are empty in master controller 16
The output of pulse is carried out under quasi- instrument controlling, thus control the first photoswitch 2, the second photoswitch 6, virtual instrument be can be used but not
It is limited to Labview software.
The polarizability detection system of the solid defects colour center, the signal acquisition and data processing section, including
Dichroscope 12, object lens 13, photoelectric sensitive device 9, master controller 16, wherein photoelectric sensitive device 9 can be used but not limited to
PN junction photodiode, the effect of 14 stimulated luminescence of diamond sample can generate fluorescence, and fluorescence passes through object lens 12, baffle with holes
11, low-pass filter 10 enters photoelectric sensitive device 9, and photoelectric sensitive device 9 is transferred to master after converting optical signals to electric signal
Control machine 16 carries out data processing and obtains the rotational parameters of system.
A kind of polarizability detection method of solid defects colour center, utilizes the polarizability detection system of the solid defects colour center
System completes the measurement of a polarizability parameter when use according to following timing:
Step 100 manipulates sample, realizes solid defects colour center electron-spin polarization；
Step 110 applies detection laser to sample, changes detection laser intensity, obtains one group of fluorescent pulse data；
Step 120 carries out Maximum-likelihood estimation or minimum variance estimate to fluorescent pulse data, obtains one group of polarizability Ρ
With the match value of light intensity Г；
Step 130 carries out Maximum-likelihood estimation or minimum variance estimate to the match value of this group of polarizability Ρ and light intensity Г,
Obtain the polarizability parameter of system；
Wherein, the method for changing light intensity in step 110, which can be used but not limited to using electronic framing program, controls λ/2
Wave plate and use PBS polarizing beam splitter.
Wherein, data analysis in step 120 and step 130, feature embodiments are regression fit analysis and parameter fitting
Method can be used but not limited to least square method Sum Maximum Likelihood Estimate method.
The advantages of the present invention over the prior art are that:
The present invention is compared to sides such as the fluorescence intensity of detection spin correlation, the detection of singlet infrared absorption and current detectings
Method obtains the match value of solid defects colour center material polarizability, then to this by being fitted analysis to multiple groups fluorescence data
Group match value carries out regression analysis, obtains the polarizability parameter of system.To realize the electronics of precise measurement solid defects colour center
Polarization and optical pumping rate, are greatly improved signal-to-noise ratio, and the relaxation time substantially shortens, for analyzing the magnetic based on quantum principles
There is important application value in terms of field measurement system performance.
Detailed description of the invention
Fig. 1 is a kind of process of the polarizability detection method based on diamond NV colour center provided by one embodiment of the present invention
Figure；
Fig. 2 is NV colour center level structure schematic diagram under zero magnetic field；
Fig. 3 is a kind of polarizability detection system figure based on diamond NV colour center provided by one embodiment of the present invention；
Fig. 4 is a kind of polarizability testing result figure based on diamond NV colour center provided by one embodiment of the present invention.
Specific embodiment
To make the technical solution of the embodiment of the present invention and becoming apparent from for advantage expression, below by drawings and examples,
Technical scheme of the present invention will be described in further detail.
Fig. 1 is a kind of process of the polarizability detection method based on diamond NV colour center provided by one embodiment of the present invention
Figure, Fig. 3 are a kind of polarizability detection system figure based on diamond NV colour center provided by one embodiment of the present invention, and Fig. 4 is this
A kind of polarizability testing result figure based on diamond NV colour center that invention one embodiment provides, as shown in figure 1, figure 3 and figure 4,
This method can include:
Step 100 manipulates sample, realizes NV colour center electron-spin polarization；
Step 110 applies detection laser to sample, changes detection laser intensity, obtains one group of fluorescent pulse data；
Optionally, the method for changing light intensity in step 110, which can be used but not limited to using electronic framing program, to be controlled
The wave plate of λ/2 and use PBS polarizing beam splitter；
Optical power determines that method is as follows: due to laser intensity be it is fixed, the mode for changing optical power is using electronic
Framing program controls the wave plate of λ/2, uses PBS as emphasis.Obtained first using light power meter rotation angle and optical power it
Between relationship, then obtained using APD rotation angle and steady-state fluorescence intensity between relationship.It in this way, can be with
Rotation angle is eliminated, and obtains the relationship between stable state luminous intensity and optical power and then obtains optical power.
Step 120 carries out Maximum-likelihood estimation or minimum variance estimate to fluorescent pulse data, obtains one group of polarizability Ρ
With the match value of light intensity Г；
Optionally, regression analysis and parameter fitness method can be used but not limited to least square method and pole in step 120
The maximum-likelihood estimation technique；
Step 130 carries out Maximum-likelihood estimation or minimum variance estimate to the match value of this group of polarizability Ρ and light intensity Г,
Obtain the polarizability parameter of system；
Optionally, regression analysis and parameter fitness method can be used but not limited to least square method and pole in step 130
The maximum-likelihood estimation technique；
For linear model, least square method may insure that estimation is unbiased esti-mator and minimum variance estimate.However, for
The optics dynamic approach of nonlinear function, it cannot be guaranteed that unbiasedness.In order to ensure the correctness of estimation, can be guaranteed according to theorem
Least Square Method by infinite approach true value, as long as observation is enough, no matter the estimation whether be it is unbiased, can obtain
Consistent estimated result.
Identical result is obtained using different approximating methods, that is, identical experimental data will obtain identical fitting knot
Fruit.So the result of both methods is different without what.This method can be commented to realize by the confidence interval of estimation
Estimate, and solves the problems, such as this using Monte Carlo simulation.As shown in figure 4, simulation result shows that estimation result meets normal state point
Cloth, it is consistent with theory analysis.Shown in the experimental series such as Fig. 4 (a) for estimating polarizability.The intensity of exciting light remains unchanged, this is really
Protect the condition for meeting independent measurement polarizability, that is, change the intensity of detection light in the case where not changing initial polarization rate.Pass through
This method obtains the absolute value of the polarizability of ODMR.It should be the result shows that maximum polarizability be 94.8% ± 0.2%, and anti-
After turning, the Minimum Polarization rate of acquisition is 78.2% ± 0.2%.
A kind of the polarizability detection system and method for solid defects colour center, device use and include solid defects colour center as quick
Sensing unit, a feature embodiments are diamond nitrogen-vacancy colour center material, manipulate to sample, realize the pole of electron spin
Change.Light intensity by changing detection light (using 532nm laser for feature embodiments diamond nitrogen-vacancy system) obtains fluorescence
Data carry out data analysis to this group of data, and feature embodiments are regression fit analysis, and then obtain the match value of polarizability.
Detection system include light source, polarization beam apparatus, sample and its manipulate part and signal acquisition and data processing section；
Part occurs for the excitation laser, including light source 1, the first photoswitch 2, the first wave plate of λ/2 3, plane mirror 4, partially
Shake beam splitter (PBS) 8, dichroscope 12, and wherein light source 1 can be used but be not limited to 532nm laser, and the first photoswitch 2 can make
With but be not limited to acousto-optic modulator (AOM), light source 1 generate continuous laser, the first photoswitch 2 is under the control of impulse generator 17
It realizes from continuous light and inputs the conversion to pulse light output, become polarised light by the wave plate of λ/2 3 and pass through polarization beam apparatus (PBS) 8
Adjust the light intensity of subsequent optical path.
The detection laser beam-generating section point, including detection light source 5, the second photoswitch 6, the 2nd wave plate of λ/2 7, polarization point
Beam device (PBS) 8, dichroscope 12, wherein detection light source 5 can be used but be not limited to 532nm laser, the second photoswitch 6 can make
With but be not limited to acousto-optic modulator (AOM), detection light source 5 generate continuous laser, the second photoswitch 6 realize from continuous light input to
The conversion of pulse light output, polarization beam apparatus (PBS) 8 generate the detection light of power adjustable, and the second photoswitch 6 is in impulse generator
Light input will continuously be surveyed by, which making under 17 control, becomes pulse microwave output；
The fluorescence detection optical path part, including photoelectric sensitive device 9, low-pass filter 10, baffle 11, two with holes
To Look mirror 12, object lens 13, wherein sensing element can be used but be not limited to avalanche photodide (APD), the fluorescence that sample issues
It is filtered through dichroscope 12 by the low-pass filtered device 10 of baffle of porous baffle 11 and is received by photoelectric sensitive device 9；
The sample manipulates part, including diamond sample 14, specimen holder 15, field generator for magnetic etc. with it, wherein
Specimen holder 15 can be used but be not limited to printed circuit board, and diamond sample 14 is placed on specimen holder 15, and field generator for magnetic mentions
For the magnetic field needed in experimentation；
The signal acquisition and data processing section includes phosphor collection part and data processing section, and wherein fluorescence is received
The subsequent processing of electric signal is realized using master controller 16 for realizing phosphor collection, data processing section in collection part.
The polarizability detection system of the solid defects colour center, the impulse generator 17 are empty in master controller 16
The output of pulse is carried out under quasi- instrument controlling, thus control the first photoswitch 2, the second photoswitch 6, virtual instrument be can be used but not
It is limited to Labview software.
The polarizability detection system of the solid defects colour center, the signal acquisition and data processing section, including
Dichroscope 12, object lens 13, photoelectric sensitive device 9, master controller 16, wherein photoelectric sensitive device 9 can be used but not limited to
PN junction photodiode, the effect of 14 stimulated luminescence of diamond sample can generate fluorescence, and fluorescence passes through object lens 12, baffle with holes
11, low-pass filter 10 enters photoelectric sensitive device 9, and photoelectric sensitive device 9 is transferred to master after converting optical signals to electric signal
Control machine 16 carries out data processing and obtains the rotational parameters of system.
One embodiment of the present of invention passes through the electronic polarization of precise measurement NV colour center and the method analysis of optical pumping rate
Its dynamic response characteristic, to realize the detection of system polarizability.The principle of concrete operation step is as follows:
As shown in Fig. 2, ground state is S=1 Spin-triplet and track singlet 3A2.Under zero magnetic field condition, null field overflows
(Zgs)|ms=± 1 > with | ms=0 > 2.87GHz in ground state.When analyze electronics optics behavioral characteristics when, can ignore by
The hyperfine structure that nuclear spin generates.First excited state is Spin-triplet and track doublet 3E, and fine structure includes |
Exy >, wherein ms=0 and | A1 >, | A2 >, | E12 >, wherein ms=± 1.Under cryogenic, the fine-structure levels of excitation state are each other
It is independent.However, at room temperature, phonon transition causes | A1 >, | A2 > and | E12 > by its particle distribution to averaged energy levels | 4 >
Less than nanosecond.There are two S=0 is unimodal and excitatory state 1A and 1E between ground state.The service life of 1A singlet is about 1ns, it can decline
1E singlet is reduced to, the service life is about 200ns at room temperature.Therefore, 1A singlet can be ignored.Pumping speed between different energy levels
Rate determines the optics dynamic characteristic of NV.
After Fig. 2, then triplet can be decayed: spoke by 532nm laser pump (ing) to excitation state by two paths
It penetrates and decays to identical ms ground state and emit photon and non-radiative decay is to 1A singlet.As temperature rises to room from 4k
Temperature, service life of singlet is from about 400ns to 150ns.Due to conventional method, parameter is obtained by k51+k52=4.91MHz experiment
?.
Therefore, rate equation is established as follows for quantitative analysis:
Wherein, kijIndicate the pumping rate between energy level i to j, kjiIndicate the pumping rate between energy level j to i, niIt indicates
Electron number in energy level i, njIndicate the electron number for being in energy level j.
General parameters is estimated, fitting function is necessary.However, for dynamical equation situation, be difficult to be had
There is the specific function of parameter.Even if obtaining this specific function, the complex form of this function makes it unsuitable for being fitted.Cause
This, solution is discretization to be carried out to dynamical equation, and the number of each timestamp is obtained under each pump rate and polarization
Value solution.Therefore, dynamical equation (1) will be from becoming:
Wherein, ni(tk) indicate in tkMoment is in the electron number of energy level i, nj(tk-1) indicate in tk-1Moment is in energy level j
Electron number, ni(tk-1) indicate in tk-1Moment is in the electron number of energy level i, and Δ t indicates discrete time interval.
Least square method is to minimize residual sum of squares (RSS).It is widely used in regression analysis and parameter fitting.The equation of LSE can
With as follows:
Wherein μ is the practical fluorescence by APD reading as voltage, and the practical fluorescence that factor-beta is equal to numerical simulation divides
The stationary value of stationary value.The parameter of parameter expression experimental system.This is formula above-mentioned (2).Propose a kind of measurement
The method of the polarizability unrelated with physical system, therefore should also be fitted the coefficient.However, due to luminous intensity and pumping rate it
Between proportionate relationship, fitting optimal light energy degree method mean to obtain, be equal to stable state luminous intensity divided by correspond to work as front pump
The stable state excitation state of Pu rate.
Another approximating method is maximum likelihood estimate.The method is that selection parameter makes selected sample parameter be
Probability is highest in the sample occurred,
The model of maximal possibility estimation is
Wherein, Ρ indicates that the polarizability of system detection, Г indicate the light intensity of system detection,For corresponding estimated value, x
Indicate the polarizability of fitting.
For single measurement point, the distribution of fluorescence data meets normal distribution, probability density function (PDF) are as follows:
Wherein xtkIndicate tkThe polarizability at moment,Indicate tkThe fluorescence voltage that moment APD reads, η indicate the fluorescence surveyed
The mean value of voltage, σ2For the variance of fluorescence voltage.
For entire single fluorescence waveform measurement, since each single measurement point is independence and same distribution, seemingly
Right function can be the orthogonal of all the points.Its probability density function can be write as:
Wherein, fluo indicates the system polarizability parameter of fitting.
If estimating that equation (6) can be further simplified using the method for first acquiring pumping rate are as follows:
It should be understood that in embodiments of the present invention, magnitude of the sequence numbers of the above procedures are not meant to the elder generation of execution sequence
Afterwards, the execution sequence of each process should be determined by its function and internal logic, the implementation process structure without coping with the embodiment of the present invention
At any restriction.
In addition, the terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates may exist
Three kinds of relationships, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.Separately
Outside, character "/" herein typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Those of ordinary skill in the art may be aware that list described in conjunction with the examples disclosed in the embodiments of the present disclosure
Member and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware
With the interchangeability of software, each exemplary composition and step are generally described according to function in the above description.This
A little functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Specially
Industry technical staff can use different methods to achieve the described function each specific application, but this realization is not
It is considered as beyond the scope of this invention.
It is apparent to those skilled in the art that for convenience of description and succinctly, foregoing description is
The specific work process of system, device and unit, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.
In several embodiments provided herein, it should be understood that disclosed systems, devices and methods, it can be with
It realizes by another way.For example, the apparatus embodiments described above are merely exemplary, for example, the division of unit,
Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be with
In conjunction with or be desirably integrated into another system, or some features can be ignored or not executed.In addition, shown or discussed
Mutual coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING of device or unit or logical
Letter connection is also possible to electricity, mechanical or other form connections.
Unit may or may not be physically separated as illustrated by the separation member, shown as a unit
Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple networks
On unit.It can select some or all of unit therein according to the actual needs to realize the mesh of the embodiment of the present invention
's.
It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit
It is that each unit physically exists alone, is also possible to two or more units and is integrated in one unit.It is above-mentioned integrated
Unit both can take the form of hardware realization, can also realize in the form of software functional units.
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be wanted with right
Subject to the protection scope asked.
The content that description in the present invention is not described in detail belongs to the prior art well known to professional and technical personnel in the field.
Claims (10)
1. a kind of solid defects colour center polarizability detection system, it is characterised in that: system uses and includes solid defects colour center conduct
Sensing element manipulates sample, realizes the polarization of electron spin；Light intensity by changing detection light obtains fluorescence data,
Data analysis is carried out to this group of data, and then obtains the match value of polarizability；Detection system includes that part, inspection occur for excitation laser
Survey laser beam-generating section point, fluorescence detection optical path part, sample and its manipulate partially and signal acquisition and data processing section.
2. solid defects colour center polarizability detection system according to claim 1, it is characterised in that: the excitation laser
Generating unit point includes light source (1), the first photoswitch (2), the first wave plate of λ/2 (3), plane mirror (4), polarization beam apparatus (PBS)
(8), dichroscope (12), wherein light source (1) can be used but be not limited to 532nm laser, and the first photoswitch (2) can be used but not
It is limited to acousto-optic modulator (AOM), light source (1) generates continuous laser, and the first photoswitch (2) is under the control of impulse generator (17)
It realizes from continuous light and inputs the conversion to pulse light output, become polarised light by the first wave plate of λ/2 (3) and pass through polarization beam apparatus
(PBS) (8) adjust the light intensity of subsequent optical path；The detection laser beam-generating section point includes detection light source (5), the second photoswitch
(6), the 2nd wave plate of λ/2 (7), polarization beam apparatus (PBS) (8), dichroscope (12), wherein detection light source (5) can be used but not
It is limited to 532nm laser, the second photoswitch (6) can be used but be not limited to acousto-optic modulator (AOM), and detection light source (5) generates company
Continuous laser, the second photoswitch (6), which is realized from continuous light, inputs the conversion to pulse light output, and polarization beam apparatus (PBS) (8) generates
The detection light of power adjustable, the second photoswitch (6) make continuously survey light and input under the control of impulse generator (17) to become arteries and veins
Rush microwave output.
3. solid defects colour center polarizability detection system according to claim 1, it is characterised in that: the fluorescence detection
Light path part, including photoelectric sensitive device (9), low-pass filter (10), baffle with holes (11), dichroscope (12), object lens
(13), wherein sensing element can be used but be not limited to avalanche photodide (APD), and the fluorescence that sample issues is through dichroscope
(12) it is received by baffle of porous baffle (11) low-pass filtered device (10) filtering by photoelectric sensitive device (9).
4. solid defects colour center polarizability detection system according to claim 1, it is characterised in that: the sample and its
Manipulate part, including diamond sample (14), specimen holder (15), field generator for magnetic, wherein specimen holder (15) can be used but not
It is limited to printed circuit board, diamond sample (14) is placed on specimen holder (15), and field generator for magnetic provides to be needed in experimentation
The magnetic field wanted.
5. solid defects colour center polarizability detection system according to claim 1, it is characterised in that: the signal acquisition
It include phosphor collection part and data processing section with data processing section, wherein phosphor collection part is for realizing fluorescence receipts
Collection, data processing section realize the subsequent processing of electric signal using master controller (16).
6. solid defects colour center polarizability detection system according to claim 1-5, it is characterised in that: described
Impulse generator (17) carries out the output of pulse under the control of master controller (16) virtual instrument, thus the first photoswitch of control
(2), the second photoswitch (6), virtual instrument can be used but be not limited to Labview software.
7. solid defects colour center polarizability detection system according to claim 1-5, it is characterised in that: described
Signal acquisition and data processing section, including dichroscope (12), object lens (13), photoelectric sensitive device (9), master controller
(16), wherein photoelectric sensitive device (9) can be used but not limited to PN junction photodiode, diamond sample (14) stimulated luminescence
Effect can generate fluorescence, and fluorescence enters Electrophotosensitive by dichroscope (12), baffle with holes (11), low-pass filter (10)
Device (9), photoelectric sensitive device (9), which converts optical signals to be transferred to master controller (16) after electric signal, to carry out data processing and obtains
To the rotational parameters of system.
8. a kind of solid defects colour center polarizability detection method utilizes the described in any item solid defects colour centers of claim 1-7
Polarizability detection system, it is characterised in that: complete the measurement of a polarizability parameter when this method uses according to following timing:
Step 100 manipulates sample, realizes solid defects colour center electron-spin polarization；
Step 110 applies detection laser to sample, changes detection laser intensity, obtains one group of fluorescent pulse data；
Step 120 carries out Maximum-likelihood estimation or minimum variance estimate to fluorescent pulse data, obtains one group of polarizability Ρ and light
The match value of strong Г；
Step 130 carries out Maximum-likelihood estimation or minimum variance estimate to the match value of this group of polarizability Ρ and light intensity Г, obtains
The polarizability of system is joined.
9. a kind of solid defects colour center polarizability detection method according to claim 8, it is characterised in that: in step 110
The method for changing light intensity, which can be used but not limited to using electronic framing program, controls the wave plate of λ/2 and using PBS polarisation point
Beam device.
10. a kind of solid defects colour center polarizability detection method according to claim 8, it is characterised in that: step 120 with
And data are analyzed in step 130, feature embodiments are that regression fit analysis and parameter fitness method can be used but not limited to most
Small square law Sum Maximum Likelihood Estimate method.
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| CN110596630A (en) * | 2019-09-19 | 2019-12-20 | 北京航空航天大学 | Frequency calibration system and method based on diamond NV color center quantum precision measurement device |
| CN112083364A (en) * | 2020-07-29 | 2020-12-15 | 奥为电子科技(南京)有限公司 | Microwave field and temperature field array type quantitative test system and method |
| CN112285080A (en) * | 2020-10-20 | 2021-01-29 | 北京航空航天大学 | Method for improving signal-to-noise ratio of diamond negatively charged NV color center detection |
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| CN110596630B (en) * | 2019-09-19 | 2020-10-16 | 北京航空航天大学 | Frequency calibration system and method based on diamond NV color center quantum precision measurement device |
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| CN112083364B (en) * | 2020-07-29 | 2023-09-08 | 奥为电子科技(南京)有限公司 | Microwave field and temperature field array type quantitative test system and method |
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| CN112285080B (en) * | 2020-10-20 | 2022-01-07 | 北京航空航天大学 | Method for improving signal-to-noise ratio of diamond negatively charged NV color center detection |
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