35 results about "Diamond color" patented technology

The invention discloses a high-resolution optical fiber integrated diamond color center sensor and a measuring method, the sensor comprises an optical fiber responsible for inputting exciting light and collecting fluorescence, the end face of the optical fiber is provided with a diamond color center, the diamond color center is excited by the output of the optical fiber, and a quartz capillary is arranged outside the optical fiber and the diamond color center. A microwave antenna is wound outside the quartz capillary tube, and a part of a bare wire of the microwave antenna is connected with the radio frequency line. The measuring method comprises the following steps: exciting a diamond color center; applying microwaves to the diamond color center; fluorescence generated by stimulated radiation of the NV color center is output by the optical fiber circulator and is input into the photoelectric detector through the filter; the upper computer controls the microwave generator to sweep frequency; the photoelectric detector performs photoelectric conversion, and the upper computer processes microwave frequency sweeping signals and electric signals. The magnetic field size and the temperature size of the sample to be measured in the micro space can be measured, and the device has the advantages of being high in spatial resolution, high in integration level, high in flexibility, high in controllability and the like.

The invention belongs to the technical field of micro-nano machining, and particularly relates to a preparation method of a diamond color center array based on a phase separation nano mask. The invention comprises two schemes. The scheme I comprises the following steps: pretreating a diamond raw material; depositing a hard mask layer on the surface of the diamond; coating an adhesion layer; coating a phase-separable patterned block copolymer or assembling high polymer materials such as biological macromolecules and the like; the diamond is subjected to annealing treatment; forming a nano mask by selectively etching the surface film layer; injecting nitrogen ions to form an NV color center array; removing the hard mask; and surface carbon impurities are removed through vacuum high-temperature annealing and acid pickling, and the high-quality color center array is obtained. The second scheme comprises a deposition step of simplifying a hard mask, and a phase-separable patterned high polymer material thick film is directly coated on the surface of the diamond raw material. By adopting two different technological processes, the preparation of the nano mask ion implantation color center array which is low in cost, high in mask precision and resolution, high in flux, extensible and large in area is realized.

The invention provides a magnetic flux acquirer and a diamond color center micro-nano scale magnetic field measuring device and method.The magnetic flux acquirer comprises a first magnetic guide probe and a second magnetic guide probe, and the first magnetic guide probe and the second magnetic guide probe are the same in shape and symmetrically installed on the two sides of a diamond; the first magnetic guide probe and the second magnetic guide probe clamp the diamond and are used for guiding magnetic induction lines to the diamond, and the first magnetic guide probe and the second magnetic guide probe are both made of high-permeability materials; the diamond color center magnetic field measuring device based on the magnetic flux acquirer can measure the magnetic property of a micro-nano scale sample; according to the diamond color center-based micro-nano scale magnetic field measuring device, the sensitivity of micro-nano scale magnetic field sensing can be improved by applying a magnetic field modulation detection method. According to the technical scheme, the technical problem that in the prior art, the requirement for sensitivity improvement of micro-nano-scale magnetic field precision measurement is difficult to meet is solved.

The invention relates to the technical field of diamond color center quantum light sources, in particular to a method for preparing a diamond color center in a positioning mode, and the method comprises the following steps that a single-face polished sapphire sheet serves as a substrate, and a microwave plasma chemical vapor deposition method is adopted for preparing a single crystal diamond with a (001) surface; preparing a metal layer on the surface of the monocrystal diamond by adopting a physical vapor deposition method, and dehumidifying and self-assembling to form balls; etching the surface of the monocrystal diamond (001) at a high temperature in a hydrogen atmosphere to form a conical pit structure with a different surface; and selectively growing a diamond color center in the cone pit by adopting a chemical vapor deposition method. Aiming at the problems that the existing ion implantation technology for positioning and preparing the diamond color center is difficult to realize nanoscale accurate control and high in cost, a foundation is laid for the integration and low-cost preparation of the high-purity and high-brightness diamond single photon source.

1. Name of the product in this design: Magnetic Sheet (Diamond Stained Window Construction Sheet). 2. Purpose of this design: For building toys using magnetic tile blocks. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the key design points: Design 1 3D view. 5. Designate Design 1 as the base design. 6. This product is made of transparent material.

The invention relates to the technical field of diamond color center quantum light sources, in particular to a method for preparing a diamond color center in a positioning mode, and the method comprises the following steps that a single-face polished sapphire sheet serves as a substrate, and a microwave plasma chemical vapor deposition method is adopted for preparing a single crystal diamond with a (001) surface; preparing a metal layer on the surface of the monocrystal diamond by adopting a physical vapor deposition method, and dehumidifying and self-assembling to form balls; etching the surface of the monocrystal diamond (001) at a high temperature in a hydrogen atmosphere to form a conical pit structure with a different surface; and selectively growing a diamond color center in the cone pit by adopting a chemical vapor deposition method. Aiming at the problems that the existing ion implantation technology for positioning and preparing the diamond color center is difficult to realize nanoscale accurate control and high in cost, a foundation is laid for the integration and low-cost preparation of the high-purity and high-brightness diamond single photon source.

The invention relates to the technical field of temperature control, in particular to a temperature control system and method based on an NV color center, and the system comprises a diamond NV color center temperature sensing module which is used for sensing the temperature change of a target area in real time and generating a corresponding fluorescence signal; the dual-channel demodulation and signal processing module is connected with the diamond NV color center temperature sensing module and is used for extracting an actual temperature value from the fluorescence signal; the PID temperature control module is connected with the dual-channel demodulation and signal processing module and is used for generating a control signal according to the deviation between the actual temperature value and the target temperature value; and the adjustment execution module is connected with the PID temperature control module and is used for adjusting the temperature of the target area according to the control signal. The high-stability temperature control system has the beneficial effects that diamond NV color center quantum sensing, two-channel demodulation and PID closed-loop control technologies are fused, and high-stability temperature control of milliKelvin-level precision and microsecond-level response under the micro-nano scale is realized.

Local quantum communication networks for general-purpose quantum computing may use millions of physical qubits to encode thousands of logical qubits, presenting a substantial hardware architecture challenge. Our modular Quantum System-on-Chip (QSoC) architecture uses a quantum microchiplet (QMC) that features compact two-dimensional arrays of diamond color centers with a resonant dielectric antenna integrated on a foundry-processed chip. Our QSoC architecture enables full connectivity for quantum memory arrays in a set of different resonant frequencies and offers the possibility of further scaling the solid-state physical qubit number via larger and denser QMC arrays and optical frequency multiplexing networking. Our QSoC architecture can efficiently generate a large scale fully connected qubit state by tuning the emitters' emission frequency. Larger qubit resources can achieve a connected qubit cluster state with less tunabiliy. Our QSoC architecture can be readily extended to other solid-state quantum memory platforms.

The present invention discloses a method for determining the type and color grade of diamonds based on Raman spectroscopy with an excitation wavelength of 405 nm. The method can determine the natural and synthetic properties of diamonds and provide a theoretical basis and technical support for the grading of diamond colors. The present invention relates to the field of determining the type of diamonds, i.e., whether they contain impurity N elements and the color grade of diamonds, and specifically to a method for detecting and identifying N3 structural defects in diamond crystal structures based on Raman spectroscopy with an excitation wavelength of 405 nm, and then determining the type and color grade of diamonds. The identification method of the present invention is accurate, non-destructive, and rapid, and can provide a universal and convenient directional identification basis for the qualitative determination of the natural and synthetic properties and color grades of diamonds, and provide a strong intellectual guarantee for the healthy and stable development of the diamond market.

The application belongs to the technical fields of diamond color center sensing and micro-nano optical preparation, and specifically discloses a dual-spectral-line resonance self-alignment NV color center flake on-sensor and a preparation method. The device takes a diamond film as a quantum defect host, constructs a micro-nano resonant cavity coupled with a ring waveguide above the diamond film, makes a first mode of a pump spectral line and a second mode of an emission spectral line satisfy the conditions of separate mode order, separate field intensity and low overlap in the same cavity, and realizes the mode coordination of excitation enhancement and emission enhancement. In the preparation, an un-released micro-cavity is first formed and used as an ion implantation hard mask, so that the lateral scattering area of the ion is matched with the evanescent field of the micro-cavity edge; then, the NV color center is annealed and activated in a full support state; finally, the sacrifice layer is removed to complete the suspension release, so as to improve the optical response efficiency, color center positioning accuracy and thermal mechanical stability.

The invention discloses a signal processing system based on a diamond color center quantum sensor, and the system comprises an NV diamond color center sensor which is used for obtaining a partial discharge signal and transmitting the partial discharge signal to a data collection module of an FPGA control module; the data acquisition module is used for transmitting the partial discharge signals to a multi-frequency synchronization module, so that the multi-frequency synchronization module generates a plurality of reference signals according to the partial discharge signals, phase locking is carried out on the partial discharge signals through the reference signals, and the partial discharge signals after frequency point synchronization are obtained; the partial discharge signal after frequency point synchronization is transmitted to the data processing unit; and the data processing unit is used for storing the partial discharge signal after the frequency point synchronization to the data storage unit and outputting the partial discharge signal after the frequency point synchronization. According to the invention, clock synchronization of multiple frequency points in the partial discharge signal can be realized.

This invention belongs to the field of micro / nano fabrication technology, specifically a method for preparing a diamond color center array based on a phase-separated nanomask. The invention includes two schemes: Scheme 1 includes: pretreatment of diamond raw material; deposition of a hard mask layer on the diamond surface; coating an adhesive layer; coating with a phase-separable patterned block copolymer or a polymeric material such as a biomolecule that can be assembled; annealing the diamond; selectively etching the surface film to form a nanomask; nitrogen ion implantation to form an NV color center array; removing the hard mask; and removing surface carbon impurities through vacuum high-temperature annealing and acid washing to obtain a high-quality color center array. Scheme 2 simplifies the hard mask deposition steps by directly coating a thick film of a phase-separable patterned polymeric material onto the diamond raw material surface. This invention achieves low-cost, high-mask precision and resolution, high-throughput scalability, and large-area nanomask ion implantation color center array preparation by employing two different process flows.

The invention discloses an integrated quantum biochip and a preparation and application method thereof, the structure of the integrated quantum biochip comprises a chip prepared by demoulding a PDMS mixed solution, an optical fiber and a diamond color center arranged in a cross-shaped groove in the chip, output laser of the optical fiber excites the diamond color center, fluorescence of excited radiation of the diamond color center is collected by the optical fiber, and the optical fiber is used for detecting the fluorescence of the diamond color center. A microwave antenna is arranged outside the diamond color center, the microwave antenna is arranged at the bottom of the chip, and a pin of the microwave antenna is connected with a radio frequency line; the preparation and application method comprises the following steps: preparing the chip; extruding and fixing a diamond color center; connecting a silica gel hose; fixing the microwave antenna; the diamond color center is excited, and microwaves are applied; fluorescence generated by stimulated radiation is output by the optical fiber circulator; the upper computer controls the microwave generator to sweep frequency; converting the received optical signal into an electric signal; the device can measure the magnetic field size and the temperature size of the trace liquid to be measured, and has the advantages of being high in spatial resolution, high in integration level, high in expansibility and high in controllability.

A diamond sensor unit includes: a diamond having a color center with electron spin; an excitation light irradiation part that irradiates the diamond with excitation light; a first patch antenna that receives electromagnetic waves; an electromagnetic wave irradiation part that irradiates the diamond with the electromagnetic waves received by the first patch antenna; a detection part that detects radiated light radiated from the color center of the diamond after the diamond is irradiated with the excitation light and the electromagnetic waves; and an optical waveguide that transmits the excitation light and the radiated light.

The application relates to a plasma processing device and an automatic uniformity regulating method. The device comprises a plasma chamber, a first electrode and a second electrode oppositely arranged in the chamber, and a radio frequency feeding device for transmitting a radio frequency current to the second electrode; a sensing layer containing diamond color centers is formed on the surface of the radio frequency feeding device in the chamber; by exciting the color centers and collecting the fluorescent signal, the real-time magnetic field distribution of the surface area of the radio frequency feeding device is determined, and a regulating signal is generated based on the comparison result with a target magnetic field distribution, so that the radio frequency current is regulated in a closed loop control mode, and the magnetic field distribution of the wafer carrying area tends to approach the target magnetic field distribution. The application can realize real-time measurement of three-dimensional vector magnetic field with high spatial resolution and millisecond-level closed loop control in situ, so that the uniformity of plasma processing is significantly improved.

The utility model relates to the technical field of composite glitter films, and particularly discloses an environment-friendly composite glitter film with gradient colors, which comprises a base material, a gradient color layer, a glitter film layer and a composite layer, the base material adopts an environment-friendly novel material CPP (Cast Polypropylene) original film, and the thickness of the base material is 30 [mu] m to 60 [mu] m; according to the gradient color layer, the gradient color layer is formed on the surface of the CPP original film, and the gradient color layer is made of environment-friendly dye; according to the glitter film layer, a glitter film is compounded on the surface of the gradient color layer, and the glitter film layer has a multi-diamond color effect. According to the composite layer, the gradient color layer and the glitter film layer are bonded together through high polymer material glue, and the final composite film material is formed.

The automatic diamond color grader can carry out color grading on diamonds on a continuous line, and manual color evaluation is not needed. And a sample diamond is conveyed by the input conveying belt and is placed on the mounting seat on the rotating plate by the mechanical arm. Nm mounting seats are arranged on the rotating plate, and Nr colorimetric stones with known color grades and Ns sample diamonds are mounted on the mounting seats. The camera shoots pictures of all diamonds on the rotating plate, then the stepping motor rotates the rotating plate by 360 / Nm degrees, and another picture is shot. The operation is repeated for Nm times, so that the sample diamond and all the colorimetric stones are respectively imaged at all Nm possible rotating positions. Averaging the pixels of all positions of each diamond to obtain x and y average values of each diamond; and the color grade of the sample diamond is the closest colorimetric stone with light x and y average values.

The invention provides a high-frequency microwave frequency source and communication equipment, and relates to the technical field of frequency sources. The frequency source comprises a laser, a diamond color center, a gain medium ring, a resonant cavity, a superconducting magnet coil, an antenna and a DDS. The diamond color center is arranged in the gain medium ring, and the axial direction is perpendicular to the direction of an oscillating magnetic field of the gain medium ring; the gain medium ring is arranged in the resonant cavity, and the axial direction of the diamond color center is perpendicular to the magnetic field direction of the resonant cavity; the resonant cavity is arranged in the superconducting magnet coil, and the axial direction of the diamond color center is parallel to the magnetic field direction; laser emitted by the laser device is incident along the axial direction of the diamond color center; the input end of the DDS penetrates through the side wall of the resonant cavity and is connected with an antenna arranged in the resonant cavity, and the output end of the DDS is used for outputting terahertz signals. Terahertz signals are generated by means of the stimulated radiation phenomenon caused by Zeeman splitting in the diamond color center, the power is large, the signal-to-noise ratio is high, and the stability is good.

The automatic diamond color grader can carry out color grading on diamonds on a continuous line, and manual color evaluation is not needed. And a sample diamond is conveyed by the input conveying belt and is placed on the mounting seat on the rotating plate by the mechanical arm. Nm mounting seats are arranged on the rotating plate, and Nr colorimetric stones with known color grades and Ns sample diamonds are mounted on the mounting seats. The camera shoots pictures of all diamonds on the rotating plate, then the stepping motor rotates the rotating plate by 360 / Nm degrees, and another picture is shot. The operation is repeated for Nm times, so that the sample diamond and all the colorimetric stones are respectively imaged at all Nm possible rotating positions. Averaging the pixels of all positions of each diamond to obtain x and y average values of each diamond; and the color grade of the sample diamond is the closest colorimetric stone with light x and y average values.

The application discloses integrated quantum diamond magnetometer, belongs to quantum magnetic sensing technical field, including by laser, optical fiber beam splitter, optical fiber probe, diamond particle, filter system, optical detector, microwave source, isolator, microwave antenna, phase-locked control system and scanning module composition;Adopt high numerical aperture optical fiber and diamond color center optical coupling, improve the transmission efficiency of excitation light and fluorescence;The microwave structure is integrated in the optical fiber probe, realizes the all-fiber integration of the light and microwave system integration;The optical fiber probe is filled with high transmission solidified material between the diamond, avoids the color center damage;The scanning module composed of the non-magnetic object table and the displacement table can realize the relative displacement of the probe and the sample, complete the three-dimensional scanning imaging of the strong gradient magnetic field. The integrated quantum diamond magnetometer provided by the application solves the problems of low integration degree of traditional equipment, light path drift and inability to realize gradient field scanning, and is convenient for equipment landing and popularization.

The invention discloses a multi-sensing-unit mutual correction tracking quantum magnetic measurement method and system for tunnel magnetoresistance and a diamond color center, a storage medium and electronic equipment. The method comprises the following steps: measuring an absolute magnetic field value of a microwave signal based on an NV color center sensing unit; determining calibration parameters of the TMR sensing unit based on the absolute magnetic field value; the voltage value output by the TMR sensing unit with the determined calibration parameters is converted into a TMR prediction magnetic field, and the TMR prediction microwave frequency is obtained through the TMR prediction magnetic field; calculating an NV measurement magnetic field based on the TMR prediction microwave frequency or the NV prediction frequency calculated by the NV color center sensing unit in the previous period; and calculating a magnetic field tracking signal based on the TMR prediction magnetic field and the NV measurement magnetic field, and taking the magnetic field tracking signal as a final magnetic field intensity value.

The invention relates to the technical field of terahertz signal detection, and provides a terahertz signal detection fluorescence system based on a diamond color center, and the system comprises an objective table which is provided with a diamond; the terahertz signal generation light path is used for generating a terahertz signal with adjustable frequency and acting on a Pb color center of the diamond; the phonon signal detection light path comprises a fluorescence detection module, a demodulation module and a signal processing module, the fluorescence detection module is used for enabling generated laser to act on the Pb color center of the diamond to generate a mixed fluorescence signal, the demodulation module is used for separating the mixed fluorescence signal to obtain two light signals, the intensity difference is determined according to the two light signals, and the signal processing module is used for processing the intensity difference; the signal processing module is used for determining the numerical value of the terahertz signal based on the electric signal. Therefore, high-sensitivity and direction-selectivity detection and real-time monitoring of terahertz signals can be realized by utilizing the quantum characteristic of the Pb color center of the diamond and the collaborative design of double optical paths.

The invention discloses a diamond NV color center laser and a preparation method thereof, and the preparation method comprises the following steps: preparing a diamond color center sample through a high-pressure and high-temperature method, carrying out the ultrasonic cleaning of the diamond color center sample, carrying out the spin coating of photoresist, carrying out the exposure of the photoresist through a double-beam interference exposure system, and carrying out the development of the sample. A patterned photoresist is obtained; plating a metal nickel mask layer on the surface of the patterned photoresist; stripping the photoresist and the nickel layer on the photoresist to form an arrayed metal nickel layer; performing thermal chemical etching to obtain a micron column; removing a nickel layer to obtain a color center diamond micron column resonant cavity array; and finally, laser emission of the NV color center is realized by utilizing a laser pumping single micron wire. Compared with the traditional electron beam exposure and dry etching combined process, the method has the advantages of large-area preparation, deep etching, low preparation cost and the like, and meanwhile, the device has the advantages of compact structure, small size, small optical loss and the like.

1. The name of the design product: magnetic sheet (diamond color window building sheet). 2. The use of the design product: building toys for magnetic sheet building blocks. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. The design product is made of transparent material.

An automated diamond color-grading machine color grades a continuous line of diamonds without human color evaluation. A sample diamond is carried by an input conveyor and placed on a mount on a rotating plate by a robotic arm. The rotating plate has Nm mounts with Nr master stones of known color grades and Ns sample diamonds. A camera takes a photo of the rotating plate with all diamonds and then a step motor rotates the plate by 360 / Nm degrees and another photo captured. This is repeated Nm times so that the sample diamond and all master stones are each imaged in all Nm possible rotational positions. Pixels are averaged over all positions for each diamond to get an average x, y value for each diamond. The color grade of the sample diamond is the master stone with the closest less-color x,y average.

The utility model relates to the technical field of laser processing, in particular to a diamond color center processing system. Comprising a laser beam splitting module, laser is split into processing laser and initial intensity detection laser, the processing laser is used for preparing the diamond NV color center, sample detection laser containing target fluorescence and intensity detection laser are obtained at the same time, the sample detection laser is subjected to fluorescence filtering to obtain the target fluorescence, then detection is conducted, and the preparation effect of the NV color center is obtained; the intensity detection laser performs fluorescence isolation to obtain light except target fluorescence, then detection is performed, whether the processing laser meets the requirement for NV color center preparation or not is judged, and the diamond color center processing system integrating NV color center preparation, detection and characterization is achieved. The wavelength of laser used by the diamond color center machining system and an optical element can be flexibly adjusted according to experimental requirements, and femtosecond laser precise micro-nano machining on the surface or the interior of diamond or other hard materials at normal temperature and normal pressure is achieved.

The present invention discloses a magnetic detection device and method based on NV color centers under ultrahigh pressure, which belongs to the field of extreme physical property characterization. A [111]-face diamond with a diameter of 100μm and containing NV color centers is used as the upper and lower anvils of the DAC device, wherein the 100μm table enables the pressure inside the pressure chamber to reach an ultrahigh pressure environment of more than 100 GPa, and the pressure conditions are higher; and compared with ordinary diamond color centers, the color centers in the [111] direction have higher signal quality under ultrahigh pressure; an antenna is made of aluminum foil and placed between the upper and lower anvils, so that it deforms into a microstrip patch antenna close to the anvil surface under ultrahigh pressure environment. Compared with other types of antennas, it has the highest quality of microwave signal transmission and the lowest loss, and can measure optical detection magnetic resonance (ODMR) spectrum under ultrahigh pressure conditions of 100 GPa and above. The present invention can perform relatively accurate quantitative testing of the magnetic properties of materials under ultrahigh pressure in a highly integrated manner.

The application provides a diamond color center microwave generator and a preparation method thereof. The diamond color center microwave generator is composed of arrayed diamond color center columns, laser diodes, sapphire resonant cavities, copper resonant cavities and microwave antennas. The diamond color center columns of each array unit can realize energy level deflection under the action of an external magnetic field, particle number inversion under the action of laser excitation, stimulated radiation under the action of external microwave particles received by the microwave antennas, and avalanche microwave particle amplification after resonance of the sapphire resonant cavities and the copper resonant cavities. The output powers of the array units are accumulated, and the microwave output power of the diamond color center microwave generator is increased.

Local quantum communication networks for general-purpose quantum computing may use millions of physical qubits to encode thousands of logical qubits, presenting a substantial hardware architecture challenge. Our modular Quantum System-on-Chip (QSoC) architecture uses a quantum microchiplet (QMC) that features compact two-dimensional arrays of diamond color centers with a resonant dielectric antenna integrated on a foundry-processed chip. Our QSoC architecture enables full connectivity for quantum memory arrays in a set of different resonant frequencies and offers the possibility of further scaling the solid-state physical qubit number via larger and denser QMC arrays and optical frequency multiplexing networking. Our QSoC architecture can efficiently generate a large scale fully connected qubit state by tuning the emitters' emission frequency. Larger qubit resources can achieve a connected qubit cluster state with less tunabiliy. Our QSoC architecture can be readily extended to other solid-state quantum memory platforms.

The application provides a quantum current sensor and a current measurement method, which comprise a diamond NV sensing chip, a magnetic concentrating ring, a laser source, a photoelectric conversion module, a microwave modulation and demodulation module and a magnetic flux regulation module; the magnetic concentrating ring is provided with an opening for sensing the magnetic flux of a measured wire; the diamond NV sensing chip is used for detecting the magnetic flux at the opening; the laser source is used for generating a laser signal of a preset wavelength and outputting the laser signal to the diamond NV sensing chip; the photoelectric conversion module receives a reflected fluorescent signal, converts the fluorescent signal into an electric signal and transmits the electric signal to the microwave modulation and demodulation module to finally obtain a demodulation voltage; and the magnetic flux regulation module obtains a reverse magnetic flux loaded to the magnetic flux detection module based on the demodulation voltage, so as to maintain the magnetic flux at the opening. The application provides the reverse magnetic flux, so that the magnetic field sensed at the NV color center is always in a small range, the problem that the diamond NV color center is difficult to detect under a large current magnetic field is avoided, and the dynamic range of the diamond NV color center for measuring the current is effectively widened.